diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..b648216
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,21 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+version: 2
+updates:
+ - package-ecosystem: "github-actions"
+ directory: "/"
+ schedule:
+ interval: "daily"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..31b2a5f
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,62 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+name: Release
+on:
+ push:
+ tags:
+ - "*"
+jobs:
+ github:
+ name: GitHub
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v4
+ - name: Extract release note
+ run: |
+ ruby \
+ -e 'print("## rubygems-requirements-system "); \
+ puts(ARGF.read.split(/^## /)[1]. \
+ gsub(/ {.+?}/, ""). \
+ gsub(/\[(.+?)\]\[.+?\]/) {$1})' \
+ doc/text/news.md > release-note.md
+ - name: Upload to release
+ run: |
+ title=$(head -n1 release-note.md | sed -e 's/^## //')
+ tail -n +2 release-note.md > release-note-without-version.md
+ gh release create ${GITHUB_REF_NAME} \
+ --discussion-category Announcements \
+ --notes-file release-note-without-version.md \
+ --title "${title}"
+ env:
+ GH_TOKEN: ${{ github.token }}
+ rubygems:
+ name: RubyGems
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ permissions:
+ id-token: write
+ environment: release
+ steps:
+ - uses: actions/checkout@v4
+ - uses: ruby/setup-ruby@v1
+ with:
+ ruby-version: ruby
+ bundler-cache: true
+ - uses: rubygems/configure-rubygems-credentials@v1.0.0
+ - name: Push gems
+ run: |
+ bundle exec rake release:rubygem_push
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..fe0b39b
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,93 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+name: Test
+on:
+ - push
+ - pull_request
+jobs:
+ docker:
+ name: ${{ matrix.distribution }}
+ strategy:
+ fail-fast: false
+ matrix:
+ distribution:
+ - almalinux-9
+ - alpine-linux
+ - alt-linux
+ - amazon-linux-2
+ - amazon-linux-2023
+ - arch-linux
+ - conda
+ - debian-bookworm
+ - fedora
+ - gentoo-linux
+ - opensuse
+ - pld-linux
+ - ubuntu-20.04
+ - ubuntu-22.04
+ - ubuntu-24.04
+ runs-on: ubuntu-latest
+ timeout-minutes: 60
+ steps:
+ - uses: actions/checkout@v4
+ - name: Prepare cache for Gentoo Linux
+ if: |
+ matrix.distribution == 'gentoo-linux'
+ run: |
+ docker pull gentoo/portage
+ gentoo_portage_id=$(docker image inspect gentoo/portage | jq -r ".[0].Id")
+ echo "GENTOO_PORTAGE_ID=${gentoo_portage_id}" >> "${GITHUB_ENV}"
+ - name: Cache binary packages for Gentoo Linux
+ if: |
+ matrix.distribution == 'gentoo-linux'
+ uses: actions/cache@v4
+ with:
+ path: .cache
+ key: ${{ matrix.distribution }}-${{ env.GENTOO_PORTAGE_ID }}
+ restore-keys: ${{ matrix.distribution }}-
+ - name: Build Docker image
+ run: |
+ docker compose build ${{ matrix.distribution }}
+ - name: Run
+ run: |
+ docker compose run --rm ${{ matrix.distribution }}
+ native:
+ name: ${{ matrix.ruby-version }} on ${{ matrix.runs-on }}
+ strategy:
+ fail-fast: false
+ matrix:
+ runs-on:
+ - macos
+ - ubuntu
+ ruby-version:
+ - "3.4"
+ - "3.3"
+ - "3.2"
+ - "3.1"
+ runs-on: ${{ matrix.runs-on }}-latest
+ timeout-minutes: 15
+ steps:
+ - uses: actions/checkout@v4
+ - uses: ruby/setup-ruby@v1
+ with:
+ ruby-version: ${{ matrix.ruby-version }}
+ bundler-cache: true
+ - name: Install
+ run: bundle exec rake install
+ - name: Install glib2 gem
+ run: |
+ MAKEFLAGS="-j$(ruby -r etc -e 'puts Etc.nprocessors')" \
+ gem install glib2
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d8b0c09
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,17 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+/.cache/
+/pkg/
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..47dd8c6
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,25 @@
+# -*- ruby -*-
+#
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+source "https://rubygems.org/"
+
+gemspec
+
+gem "bundler"
+gem "rake"
+
+gem "cairo", path: File.join(__dir__, "rcairo")
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d51768f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,141 @@
+# rubygems-requirements-system
+
+## Summary
+
+This is a RubyGems plugin. This installs system packages that are
+needed by a gem automatically.
+
+This is convenient for both of users and developers.
+
+Users don't need to install gem dependencies separately.
+
+Developers don't need to write documents how to install gem
+dependencies.
+
+## Motivation
+
+Bindings are helpful for developers because developers don't need to
+re-implement existing features. But users need to install not only
+bindings but also dependencies.
+
+There are some approaches to reduce the inconvenience:
+
+1. Installs dependencies automatically
+2. Bundles dependencies (a.k.a. fat gem)
+
+The 1. approach is used by Ruby-GNOME packages such as glib2 gem and
+gtk4 gem.
+
+The 2. approach is used by Nokogiri.
+
+If gems that use the 2. approach are maintained actively, there are
+not much problems. There are several problems otherwise. For example,
+security concerns and new CRuby support.
+
+See also:
+https://slide.rabbit-shocker.org/authors/kou/rubykaigi-takeout-2020/
+
+The 1. approach will reduce maintenance costs. It will help both of
+developers and users. If we can reduce maintenance costs for
+developers, developers can focus on new features and bug fixes than
+releases.
+
+## Usage
+
+Add `rubygems-requirements-system` to your gem's runtime dependencies:
+
+```ruby
+Gem::Specification.new do |spec|
+ # ...
+ spec.add_runtime_dependency("rubygems-requirements-system")
+ # ...
+end
+```
+
+Add dependency information to `Gem::Specification#requirements`:
+
+```ruby
+Gem::Specification.new do |spec|
+ # ...
+
+ # Install GObject. Package ID is pkg-config's package name for now.
+ # We'll add support for other package system's name such as CMake
+ # package's name.
+ # We can specify package names for each platform.
+ spec.requirements << "system: gobject-2.0: alt_linux: glib2-devel"
+ spec.requirements << "system: gobject-2.0: arch_linux: glib2"
+ spec.requirements << "system: gobject-2.0: conda: glib"
+ spec.requirements << "system: gobject-2.0: debian: libglib2.0-dev"
+ spec.requirements << "system: gobject-2.0: gentoo_linux: dev-libs/glib"
+ spec.requirements << "system: gobject-2.0: homebrew: glib"
+ spec.requirements << "system: gobject-2.0: macports: glib2"
+ # We can omit the Red Hat Enterprise Linux family case because
+ # "pkgconfig(gobject-2.0)" can be generated automatically.
+ spec.requirements << "system: gobject-2.0: rhel: pkgconfig(gobject-2.0)"
+
+ # ...
+end
+```
+
+You can require dependency A or B. For example, you can require
+`mysqlclient` or `libmariadb`.
+
+```ruby
+Gem::Specification.new do |spec|
+ # ...
+
+ # We need mysqliclient or libmariadb for this gem.
+ spec.requirements << "system: mysqlclient|libmariadb: arch_linux: mariadb-libs"
+ spec.requirements << "system: mysqlclient|libmariadb: debian: libmysqlclient-dev"
+ spec.requirements << "system: mysqlclient|libmariadb: debian: libmariadb-dev"
+
+ # ...
+end
+```
+
+You can install multiple packages for a dependency.
+
+```ruby
+Gem::Specification.new do |spec|
+ # ...
+
+ # We need to install multiple packages to use cairo with conda.
+ spec.requirements << "system: cairo: conda: cairo"
+ spec.requirements << "system: cairo: conda: expat"
+ spec.requirements << "system: cairo: conda: xorg-kbproto"
+ spec.requirements << "system: cairo: conda: xorg-libxau"
+ spec.requirements << "system: cairo: conda: xorg-libxext"
+ spec.requirements << "system: cairo: conda: xorg-libxrender"
+ spec.requirements << "system: cairo: conda: xorg-renderproto"
+ spec.requirements << "system: cairo: conda: xorg-xextproto"
+ spec.requirements << "system: cairo: conda: xorg-xproto"
+ spec.requirements << "system: cairo: conda: zlib"
+
+ # ...
+end
+```
+
+## Requirements
+
+RubyGems 3.5.0 or later is required. RubyGems can load installed
+plugin immediately since 3.5.0.
+
+If `gem install glib2` installs rubygems-requirements-system gem as a
+dependency, old RubyGems doesn't use a RubyGems plugin in
+rubygems-requirements-system gem while installing glib2 gem. So glib2
+gem dependencies aren't installed automatically.
+
+## History
+
+This is based on
+[native-package-installer](https://github.com/ruby-gnome/native-package-installer)
+gem. We could add support for RubyGems plugin to
+native-package-installer but we didn't. Because "native" package isn't
+a natural name for a package on the target platform. We want to use
+other word than "native". So we create a new gem.
+
+## License
+
+Copyright (C) 2013-2025 Ruby-GNOME Project Team
+
+LGPL-3 or later. See doc/text/lgpl-3.txt for details.
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..82ee022
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,25 @@
+# -*- ruby -*-
+#
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require "bundler/gem_helper"
+
+base_dir = File.dirname(__FILE__)
+helper = Bundler::GemHelper.new(base_dir)
+def helper.version_tag
+ version
+end
+helper.install
diff --git a/compose.yaml b/compose.yaml
new file mode 100644
index 0000000..5222247
--- /dev/null
+++ b/compose.yaml
@@ -0,0 +1,172 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+services:
+ almalinux-9:
+ build:
+ context: .
+ dockerfile: dockerfiles/almalinux.dockerfile
+ args:
+ VERSION: "9"
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ alpine-linux:
+ build:
+ context: .
+ dockerfile: dockerfiles/alpine-linux.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ alt-linux:
+ build:
+ context: .
+ dockerfile: dockerfiles/alt-linux.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ amazon-linux-2:
+ build:
+ context: .
+ dockerfile: dockerfiles/amazon-linux-2.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ amazon-linux-2023:
+ build:
+ context: .
+ dockerfile: dockerfiles/amazon-linux-2023.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ arch-linux:
+ build:
+ context: .
+ dockerfile: dockerfiles/arch-linux.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ conda:
+ build:
+ context: .
+ dockerfile: dockerfiles/conda.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ debian-bookworm:
+ build:
+ context: .
+ dockerfile: dockerfiles/debian.dockerfile
+ args:
+ CODE_NAME: "bookworm"
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ fedora:
+ build:
+ context: .
+ dockerfile: dockerfiles/fedora.dockerfile
+ args:
+ VERSION: "latest"
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ gentoo-linux-portage:
+ image: gentoo/portage
+ command:
+ /bin/true
+
+ gentoo-linux:
+ build:
+ context: .
+ dockerfile: dockerfiles/gentoo-linux.dockerfile
+ volumes:
+ - .:/host:delegated
+ - .cache/gentoo-linux/binpkgs:/var/cache/binpkgs:delegated
+ volumes_from:
+ - gentoo-linux-portage
+ command:
+ /host/dockerfiles/run-test-gentoo-linux.sh
+
+ opensuse:
+ build:
+ context: .
+ dockerfile: dockerfiles/opensuse.dockerfile
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ pld-linux:
+ build:
+ context: .
+ dockerfile: dockerfiles/pld-linux.dockerfile
+ volumes:
+ - .:/host:delegated
+ security_opt:
+ - seccomp:unconfined
+ command:
+ /host/dockerfiles/run-test.sh
+
+ ubuntu-20.04:
+ build:
+ context: .
+ dockerfile: dockerfiles/ubuntu.dockerfile
+ args:
+ VERSION: "20.04"
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ ubuntu-22.04:
+ build:
+ context: .
+ dockerfile: dockerfiles/ubuntu.dockerfile
+ args:
+ VERSION: "22.04"
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
+
+ ubuntu-24.04:
+ build:
+ context: .
+ dockerfile: dockerfiles/ubuntu.dockerfile
+ args:
+ VERSION: "24.04"
+ volumes:
+ - .:/host:delegated
+ command:
+ /host/dockerfiles/run-test.sh
diff --git a/doc/text/gpl-3.txt b/doc/text/gpl-3.txt
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/doc/text/gpl-3.txt
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+ To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received. You must make sure that they, too, receive
+or can get the source code. And you must show them these terms so they
+know their rights.
+
+ Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+ For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+ Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so. This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software. The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable. Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products. If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+ Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary. To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ TERMS AND CONDITIONS
+
+ 0. Definitions.
+
+ "This License" refers to version 3 of the GNU General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+ "The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+ To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+ A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+ To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+ To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+ An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+ 1. Source Code.
+
+ The "source code" for a work means the preferred form of the work
+for making modifications to it. "Object code" means any non-source
+form of a work.
+
+ A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+ The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+ The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities. However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
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+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
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+
+ Nothing in this License shall be construed as excluding or limiting
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+ 12. No Surrender of Others' Freedom.
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+ The Free Software Foundation may publish revised and/or new versions of
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+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+ 16. Limitation of Liability.
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+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
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+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
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+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
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+
+ Copyright (C)
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+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/doc/text/lgpl-3.txt b/doc/text/lgpl-3.txt
new file mode 100644
index 0000000..0a04128
--- /dev/null
+++ b/doc/text/lgpl-3.txt
@@ -0,0 +1,165 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
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+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
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+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
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+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
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+ 4. Combined Works.
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+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/dockerfiles/almalinux.dockerfile b/dockerfiles/almalinux.dockerfile
new file mode 100644
index 0000000..79dd0d6
--- /dev/null
+++ b/dockerfiles/almalinux.dockerfile
@@ -0,0 +1,42 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+ARG VERSION
+FROM almalinux:${VERSION}
+
+RUN \
+ dnf install -y \
+ gcc \
+ make \
+ redhat-rpm-config \
+ ruby-devel \
+ sudo \
+ which && \
+ dnf clean all
+
+RUN \
+ gem install --no-user-install \
+ bundler \
+ rake
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/alpine-linux.dockerfile b/dockerfiles/alpine-linux.dockerfile
new file mode 100644
index 0000000..2c28516
--- /dev/null
+++ b/dockerfiles/alpine-linux.dockerfile
@@ -0,0 +1,47 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM alpine
+
+RUN \
+ apk update && apk upgrade && \
+ apk add \
+ bash \
+ build-base \
+ gcc \
+ make \
+ ruby \
+ ruby-dev \
+ openssl \
+ openssl-dev \
+ zlib \
+ zlib-dev \
+ sudo \
+ which
+
+RUN \
+ gem install --no-user-install \
+ bundler \
+ rake
+
+RUN \
+ adduser devel -G wheel -D -h /home/devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/alt-linux.dockerfile b/dockerfiles/alt-linux.dockerfile
new file mode 100644
index 0000000..5a57221
--- /dev/null
+++ b/dockerfiles/alt-linux.dockerfile
@@ -0,0 +1,38 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM alt
+
+RUN \
+ apt-get update && \
+ apt-get install -y \
+ gcc \
+ libruby-devel \
+ libpcre-devel \
+ make \
+ rake \
+ ruby \
+ sudo \
+ which
+
+RUN \
+ useradd --user-group --groups wheel --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/amazon-linux-2.dockerfile b/dockerfiles/amazon-linux-2.dockerfile
new file mode 100644
index 0000000..9d72c78
--- /dev/null
+++ b/dockerfiles/amazon-linux-2.dockerfile
@@ -0,0 +1,43 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM amazonlinux:2
+
+RUN \
+ amazon-linux-extras install -y ruby3.0 && \
+ yum install -y \
+ gcc \
+ make \
+ redhat-rpm-config \
+ ruby-devel \
+ shadow-utils \
+ sudo \
+ which && \
+ yum clean all
+
+RUN \
+ gem install --no-user-install \
+ bundler \
+ rake
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/amazon-linux-2023.dockerfile b/dockerfiles/amazon-linux-2023.dockerfile
new file mode 100644
index 0000000..6331961
--- /dev/null
+++ b/dockerfiles/amazon-linux-2023.dockerfile
@@ -0,0 +1,41 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM amazonlinux:2023
+
+RUN \
+ dnf install -y \
+ gcc \
+ make \
+ ruby-devel \
+ shadow-utils \
+ sudo \
+ which && \
+ dnf clean all
+
+RUN \
+ gem install --no-user-install \
+ bundler \
+ rake
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/arch-linux.dockerfile b/dockerfiles/arch-linux.dockerfile
new file mode 100644
index 0000000..ebb770b
--- /dev/null
+++ b/dockerfiles/arch-linux.dockerfile
@@ -0,0 +1,39 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM archlinux
+
+RUN \
+ pacman --sync --noconfirm --refresh --sysupgrade && \
+ pacman --sync --noconfirm \
+ gcc \
+ make \
+ ruby \
+ sudo \
+ which
+
+RUN \
+ gem install --no-user-install bundler rake
+
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/conda.dockerfile b/dockerfiles/conda.dockerfile
new file mode 100644
index 0000000..e825f18
--- /dev/null
+++ b/dockerfiles/conda.dockerfile
@@ -0,0 +1,22 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM continuumio/miniconda3
+
+RUN \
+ conda install -c conda-forge -y --quiet \
+ compilers \
+ make \
+ ruby
diff --git a/dockerfiles/debian.dockerfile b/dockerfiles/debian.dockerfile
new file mode 100644
index 0000000..1a26595
--- /dev/null
+++ b/dockerfiles/debian.dockerfile
@@ -0,0 +1,40 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+ARG CODE_NAME
+FROM debian:${CODE_NAME}
+
+RUN \
+ echo "debconf debconf/frontend select Noninteractive" | \
+ debconf-set-selections
+
+RUN \
+ apt-get update && \
+ apt-get install -y \
+ gcc \
+ make \
+ ruby-bundler \
+ ruby-dev \
+ sudo
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/fedora.dockerfile b/dockerfiles/fedora.dockerfile
new file mode 100644
index 0000000..fe61669
--- /dev/null
+++ b/dockerfiles/fedora.dockerfile
@@ -0,0 +1,39 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+ARG VERSION
+FROM fedora:${VERSION}
+
+RUN \
+ dnf install -y \
+ gcc \
+ make \
+ redhat-rpm-config \
+ ruby-devel \
+ rubygem-bundler \
+ rubygem-rake \
+ sudo \
+ which && \
+ dnf clean all
+
+RUN \
+ useradd --user-group --create-home native-package-installer
+
+RUN \
+ echo "native-package-installer ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/native-package-installer
+
+USER native-package-installer
+WORKDIR /home/native-package-installer
diff --git a/dockerfiles/gentoo-linux.dockerfile b/dockerfiles/gentoo-linux.dockerfile
new file mode 100644
index 0000000..65ab4bb
--- /dev/null
+++ b/dockerfiles/gentoo-linux.dockerfile
@@ -0,0 +1,33 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM gentoo/stage3
+
+RUN \
+ ( \
+ echo "BINPKG_FORMAT=\"gpkg\""; \
+ echo "FEATURES=\"buildpkg\""; \
+ echo "MAKEOPTS=\"-j$(($(nproc) +1))\""; \
+ ) >> /etc/portage/make.conf
+
+RUN \
+ useradd --user-group --create-home devel
+
+# RUN \
+# echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+# EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+# USER devel
+# WORKDIR /home/devel
diff --git a/dockerfiles/opensuse.dockerfile b/dockerfiles/opensuse.dockerfile
new file mode 100644
index 0000000..81edb18
--- /dev/null
+++ b/dockerfiles/opensuse.dockerfile
@@ -0,0 +1,36 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM opensuse/leap
+
+RUN \
+ zypper --non-interactive install \
+ gcc \
+ make \
+ ruby2.5-devel \
+ ruby2.5-rubygem-bundler \
+ ruby2.5-rubygem-rake \
+ sudo \
+ which
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/pld-linux.dockerfile b/dockerfiles/pld-linux.dockerfile
new file mode 100644
index 0000000..8026459
--- /dev/null
+++ b/dockerfiles/pld-linux.dockerfile
@@ -0,0 +1,36 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+FROM registry.gitlab.com/pld-linux/pld
+
+RUN \
+ poldek --noask --update --upgrade \
+ gcc \
+ make \
+ ruby \
+ ruby-bundler \
+ ruby-rake \
+ sudo \
+ which
+
+RUN \
+ adduser -S devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/dockerfiles/run-test-gentoo-linux.sh b/dockerfiles/run-test-gentoo-linux.sh
new file mode 100755
index 0000000..e4aaca2
--- /dev/null
+++ b/dockerfiles/run-test-gentoo-linux.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+#
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+set -eux
+
+emerge \
+ --usepkg \
+ app-admin/sudo \
+ dev-lang/ruby
+
+mkdir -p /etc/sudoers.d
+echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+cd ~devel
+sudo -u devel -H \
+ $(dirname $0)/run-test.sh --no-user-install "$@"
diff --git a/dockerfiles/run-test.sh b/dockerfiles/run-test.sh
new file mode 100755
index 0000000..88a48b9
--- /dev/null
+++ b/dockerfiles/run-test.sh
@@ -0,0 +1,32 @@
+#!/bin/bash -l
+#
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+set -eux
+
+rm -rf build
+cp -r /host build
+cd build
+
+if sudo which rake; then
+ sudo rake install
+else
+ rake install
+fi
+
+cd test/fixture/dummy-cairo
+gem build *.gemspec
+gem install --user-install ./*.gem "$@"
diff --git a/dockerfiles/ubuntu.dockerfile b/dockerfiles/ubuntu.dockerfile
new file mode 100644
index 0000000..29d4381
--- /dev/null
+++ b/dockerfiles/ubuntu.dockerfile
@@ -0,0 +1,40 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+ARG VERSION
+FROM ubuntu:${VERSION}
+
+RUN \
+ echo "debconf debconf/frontend select Noninteractive" | \
+ debconf-set-selections
+
+RUN \
+ apt-get update && \
+ apt-get install -y \
+ gcc \
+ make \
+ ruby-bundler \
+ ruby-dev \
+ sudo
+
+RUN \
+ useradd --user-group --create-home devel
+
+RUN \
+ echo "devel ALL=(ALL:ALL) NOPASSWD:ALL" | \
+ EDITOR=tee visudo -f /etc/sudoers.d/devel
+
+USER devel
+WORKDIR /home/devel
diff --git a/lib/rubygems-requirements-system/executable-finder.rb b/lib/rubygems-requirements-system/executable-finder.rb
new file mode 100644
index 0000000..5113d72
--- /dev/null
+++ b/lib/rubygems-requirements-system/executable-finder.rb
@@ -0,0 +1,87 @@
+# Copyright (C) 2013-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require "rbconfig"
+
+module RubyGemsRequirementsSystem
+ class ExecutableFinder
+ class << self
+ def find(basename)
+ new(basename).find
+ end
+
+ def exist?(basename)
+ new(basename).exist?
+ end
+ end
+
+ def initialize(basename)
+ @basename = basename
+ @appended_paths = []
+ end
+
+ def find
+ extensions = detect_extensions
+ paths.each do |path|
+ executable_file = File.join(path, @basename)
+ return executable_file if executable?(executable_file)
+ extensions.each do |extension|
+ executable_file_with_extension = executable_file + extension
+ if executable?(executable_file_with_extension)
+ return executable_file_with_extension
+ end
+ end
+ end
+ nil
+ end
+
+ def exist?
+ not find.nil?
+ end
+
+ def append_path(path)
+ @appended_paths << path
+ end
+
+ private
+ def paths
+ path_env = ENV["PATH"]
+ if path_env
+ base_paths = path_env.split(File::PATH_SEPARATOR)
+ else
+ base_paths = ["/usr/local/bin", "/usr/bin", "/bin"]
+ end
+ base_paths + @appended_paths
+ end
+
+ def detect_extensions
+ exts = RbConfig::CONFIG["EXECUTABLE_EXTS"]
+ return exts.split if exts
+ ext = RbConfig::CONFIG["EXEEXT"]
+ return [ext] if ext
+ []
+ end
+
+ def executable?(path)
+ begin
+ stat = File.stat(path)
+ rescue SystemCallError
+ false
+ else
+ stat.file? and stat.executable?
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/installer.rb b/lib/rubygems-requirements-system/installer.rb
new file mode 100644
index 0000000..1e8802d
--- /dev/null
+++ b/lib/rubygems-requirements-system/installer.rb
@@ -0,0 +1,114 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require "shellwords"
+
+require "pkg-config"
+
+require_relative "version"
+
+require_relative "platform"
+
+module RubyGemsRequirementsSystem
+ Package = Struct.new(:id, :operator, :version) do
+ def valid?
+ return false if id.empty?
+ return false if operator and version.nil?
+ true
+ end
+ end
+
+ Requirement = Struct.new(:packages, :system_packages) do
+ def satisfied?
+ packages.any? do |package|
+ installed?(package)
+ end
+ end
+
+ private
+ def installed?(package)
+ package_config = PKGConfig.package_config(package.id)
+ begin
+ package_config.cflags
+ rescue PackageConfig::NotFoundError
+ return false
+ end
+
+ return true if package.version.nil?
+
+ current_version = Gem::Version.new(package_config.version)
+ required_version = Gem::Version.new(package.version)
+ current_version.__send__(package.operator, required_version)
+ end
+ end
+
+ class Installer
+ include Gem::UserInteraction
+
+ def initialize(gemspec)
+ @gemspec = gemspec
+ @platform = Platform.detect
+ end
+
+ def install
+ requirements = parse_requirements(@gemspec.requirements)
+ requirements.all? do |requirement|
+ next true if requirement.satisfied?
+ @platform.install(requirement)
+ end
+ end
+
+ private
+ def parse_requirements(gemspec_requirements)
+ requirements = {}
+ gemspec_requirements.each do |gemspec_requirement|
+ components = gemspec_requirement.split(/: +/, 4)
+ next unless components.size == 4
+
+ id, raw_packages, platform, system_package = components
+ next unless id == "system"
+
+ packages = parse_packages(raw_packages)
+ next if packages.empty?
+
+ next unless @platform.target?(platform)
+ requirements[packages] ||= []
+ requirements[packages] << system_package
+ end
+ requirements.collect do |packages, system_packages|
+ Requirement.new(packages, system_packages)
+ end
+ end
+
+ def parse_packages(raw_packages)
+ packages = raw_packages.split(/\s*\|\s*/).collect do |raw_package|
+ Package.new(*raw_package.split(/\s*(==|!=|>=|>|<=|<)\s*/, 3))
+ end
+ # Ignore this requirement if any invalid package is included.
+ # We must not report an error for this because
+ # Gem::Specification#requirements is a free form
+ # configuration. So there are configuration values that use
+ # "system: ..." but not for this plugin. We can report a
+ # warning instead.
+ packages.each do |package|
+ unless package.valid?
+ # TODO: Report a warning
+ return []
+ end
+ end
+ packages
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/os-release.rb b/lib/rubygems-requirements-system/os-release.rb
new file mode 100644
index 0000000..5a46647
--- /dev/null
+++ b/lib/rubygems-requirements-system/os-release.rb
@@ -0,0 +1,59 @@
+# Copyright (C) 2021-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+module RubyGemsRequirementsSystem
+ class OSRelease
+ include Enumerable
+
+ def initialize
+ parse
+ end
+
+ def each(&block)
+ @variables.each(&block)
+ end
+
+ def [](key)
+ @variables[key]
+ end
+
+ def id
+ self["ID"]
+ end
+
+ def id_like
+ (self["ID_LIKE"] || "").split(/ /)
+ end
+
+ def version
+ self["VERSION"]
+ end
+
+ private
+ def parse
+ @variables = {}
+ path = "/etc/os-release"
+ return unless File.exist?(path)
+ File.foreach(path) do |line|
+ key, value = line.strip.split("=", 2)
+ next if value.nil?
+ if value.start_with?("\"") and value.end_with?("\"")
+ value = value[1..-2]
+ end
+ @variables[key] = value
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/package.rb b/lib/rubygems-requirements-system/package.rb
new file mode 100644
index 0000000..ca61ea0
--- /dev/null
+++ b/lib/rubygems-requirements-system/package.rb
@@ -0,0 +1,17 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+module RubyGemsRequirementsSystem
+end
diff --git a/lib/rubygems-requirements-system/platform.rb b/lib/rubygems-requirements-system/platform.rb
new file mode 100644
index 0000000..cf89436
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform.rb
@@ -0,0 +1,72 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+module RubyGemsRequirementsSystem
+ module Platform
+ PLATFORM_CLASSES = []
+
+ class << self
+ def register(platform_class)
+ PLATFORM_CLASSES << platform_class
+ end
+
+ def detect
+ PLATFORM_CLASSES.reverse_each do |platform_class|
+ return platform_class.new if platform_class.current_platform?
+ end
+ Unknown.new
+ end
+ end
+ end
+end
+
+require_relative "platform/base"
+
+# macOS
+require_relative "platform/macports"
+
+
+# FreeBSD
+require_relative "platform/freebsd"
+
+
+# Linux
+require_relative "platform/arch-linux"
+require_relative "platform/gentoo-linux"
+
+require_relative "platform/debian"
+require_relative "platform/ubuntu"
+require_relative "platform/alt-linux"
+
+require_relative "platform/pld-linux"
+
+require_relative "platform/fedora"
+require_relative "platform/red-hat-enterprise-linux"
+require_relative "platform/amazon-linux-2"
+require_relative "platform/amazon-linux-2023"
+
+require_relative "platform/suse"
+
+require_relative "platform/alpine-linux"
+
+
+# Platform independent
+require_relative "platform/homebrew"
+require_relative "platform/conda"
+# TODO: Conan
+# TODO: vcpkg
+
+# Fallback
+require_relative "platform/unknown"
diff --git a/lib/rubygems-requirements-system/platform/alpine-linux.rb b/lib/rubygems-requirements-system/platform/alpine-linux.rb
new file mode 100644
index 0000000..5b79150
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/alpine-linux.rb
@@ -0,0 +1,44 @@
+# Copyright (C) 2023-2024 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class AlpineLinux < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id == "alpine"
+ end
+ end
+
+ def target?(platform)
+ platform == "alpine_linux"
+ end
+
+ private
+ def need_super_user_priviledge?
+ true
+ end
+
+ def install_command_line(package)
+ ["apk", "add", package]
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/alt-linux.rb b/lib/rubygems-requirements-system/platform/alt-linux.rb
new file mode 100644
index 0000000..f609eac
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/alt-linux.rb
@@ -0,0 +1,52 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class ALTLinux < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id == "altlinux"
+ end
+ end
+
+ def target?(platform)
+ platform == "alt_linux"
+ end
+
+ private
+ def install_command_line(package)
+ [
+ "env",
+ "DEBIAN_FRONTEND=noninteractive",
+ "apt-get",
+ "install",
+ "-V",
+ "-y",
+ package,
+ ]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/amazon-linux-2.rb b/lib/rubygems-requirements-system/platform/amazon-linux-2.rb
new file mode 100644
index 0000000..708a899
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/amazon-linux-2.rb
@@ -0,0 +1,50 @@
+# Copyright (C) 2022-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "red-hat-enterprise-linux"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class AmazonLinux2 < RedHatEnterpriseLinux
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id == "amzn" and os_release.version == "2"
+ end
+ end
+
+ def target?(platform)
+ case platform
+ when "amazon_linux_2", "amazon_linux"
+ true
+ else
+ super
+ end
+ end
+
+ private
+ def install_command_line(package)
+ [
+ "yum",
+ "install",
+ "-y",
+ package,
+ ]
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/amazon-linux-2023.rb b/lib/rubygems-requirements-system/platform/amazon-linux-2023.rb
new file mode 100644
index 0000000..f9e0186
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/amazon-linux-2023.rb
@@ -0,0 +1,40 @@
+# Copyright (C) 2023-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "fedora"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class AmazonLinux2023 < Fedora
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id == "amzn" and os_release.version == "2023"
+ end
+ end
+
+ def target?(platform)
+ case platform
+ when "amazon_linux_2023", "amazon_linux"
+ true
+ else
+ super
+ end
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/arch-linux.rb b/lib/rubygems-requirements-system/platform/arch-linux.rb
new file mode 100644
index 0000000..8f19515
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/arch-linux.rb
@@ -0,0 +1,43 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class ArchLinux < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ ExecutableFinder.exist?("pacman")
+ end
+ end
+
+ def target?(platform)
+ platform == "arch_linux"
+ end
+
+ private
+ def install_command_line(package)
+ ["pacman", "-S", "--noconfirm", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/base.rb b/lib/rubygems-requirements-system/platform/base.rb
new file mode 100644
index 0000000..4027caf
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/base.rb
@@ -0,0 +1,135 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require "fileutils"
+
+require_relative "../executable-finder"
+require_relative "../os-release"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Base
+ include Gem::UserInteraction
+
+ def target?(platform)
+ raise NotImpelementedError
+ end
+
+ def install(requirement)
+ synchronize do
+ target_packages(requirement).any? do |package|
+ install_package(package) and requirement.satisfied?
+ end
+ end
+ end
+
+ private
+ def sudo
+ if have_priviledge?
+ nil
+ else
+ @sudo ||= ExecutableFinder.find("sudo")
+ end
+ end
+
+ def synchronize
+ if Gem.respond_to?(:state_home)
+ state_home = Gem.state_home
+ else
+ state_home =
+ ENV["XDG_STATE_HOME"] ||
+ File.join(Gem.user_home, ".local", "state")
+ end
+ lock_file_path = File.join(state_home,
+ "gem",
+ "requirements_system_lock")
+ FileUtils.mkdir_p(File.dirname(lock_file_path))
+ File.open(lock_file_path, "w") do |lock_file|
+ lock_file.flock(File::LOCK_EX)
+ yield
+ end
+ end
+
+ def super_user?
+ Process.uid.zero?
+ end
+
+ def need_super_user_priviledge?
+ raise NotImpelementedError
+ end
+
+ def have_priviledge?
+ return true unless need_super_user_priviledge?
+ super_user?
+ end
+
+ def target_packages(requirement)
+ requirement.system_packages
+ end
+
+ def install_package(package)
+ command_line = prepare_command_line(package)
+ if command_line
+ unless run_command_line(package, "prepare", command_line)
+ return false
+ end
+ end
+ run_command_line(package, "install", install_command_line(package))
+ end
+
+ def run_command_line(package, action, command_line)
+ failed_to_get_super_user_priviledge = false
+ command_line = install_command_line(package)
+ if have_priviledge?
+ succeeded = system(*command_line)
+ else
+ if sudo
+ prompt = "[sudo] password for %u to #{action} <#{package}>: "
+ command_line = [sudo, "-p", prompt, *command_line]
+ succeeded = system(*command_line)
+ else
+ succeeded = false
+ failed_to_get_super_user_priviledge = true
+ end
+ end
+ if failed_to_get_super_user_priviledge
+ result_message = "require super user privilege"
+ else
+ result_message = succeeded ? "succeeded" : "failed"
+ end
+ say("#{action.capitalize} '#{package}' system package: #{result_message}")
+
+ unless succeeded
+ escaped_command_line = command_line.collect do |part|
+ Shellwords.escape(part)
+ end
+ alert_warning("'#{package}' system package is required.")
+ alert_warning("Run the following command " +
+ "to #{action} required system package: " +
+ escaped_install_command.join(" "))
+ end
+ succeeded
+ end
+
+ def prepare_command_line(package)
+ nil
+ end
+
+ def install_command_line(package)
+ raise NotImpelementedError
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/conda.rb b/lib/rubygems-requirements-system/platform/conda.rb
new file mode 100644
index 0000000..3736a60
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/conda.rb
@@ -0,0 +1,43 @@
+# Copyright (C) 2023-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Conda < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ ENV["CONDA_PREFIX"] && ExecutableFinder.exist?("conda")
+ end
+ end
+
+ def target?(platform)
+ platform == "conda"
+ end
+
+ private
+ def install_command_line(package)
+ ["conda", "install", "-c", "conda-forge", "-y", package]
+ end
+
+ def need_super_user_priviledge?
+ false
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/debian.rb b/lib/rubygems-requirements-system/platform/debian.rb
new file mode 100644
index 0000000..0faafde
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/debian.rb
@@ -0,0 +1,67 @@
+# Copyright (C) 2013-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Debian < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ case os_release.id
+ when "debian", "raspbian"
+ return true
+ else
+ return true if os_release.id_like.include?("debian")
+ end
+ false
+ end
+ end
+
+ def target?(platform)
+ case platform
+ when "debian", "raspbian"
+ true
+ else
+ false
+ end
+ end
+
+ private
+ def prepare_command_line(package)
+ ["apt-get", "update"]
+ end
+
+ def install_command_line(package)
+ [
+ "env",
+ "DEBIAN_FRONTEND=noninteractive",
+ "apt-get",
+ "install",
+ "-V",
+ "-y",
+ package,
+ ]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/fedora.rb b/lib/rubygems-requirements-system/platform/fedora.rb
new file mode 100644
index 0000000..b1bbf6f
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/fedora.rb
@@ -0,0 +1,44 @@
+# Copyright (C) 2021-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "red-hat-enterprise-linux"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Fedora < RedHatEnterpriseLinux
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id == "fedora" or os_release.id_like.include?("fedora")
+ end
+ end
+
+ def target?(platform)
+ platform == "fedora" || super
+ end
+
+ private
+ def install_command_line(package)
+ ["dnf", "install", "-y", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/freebsd.rb b/lib/rubygems-requirements-system/platform/freebsd.rb
new file mode 100644
index 0000000..ab0c36f
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/freebsd.rb
@@ -0,0 +1,43 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class FreeBSD < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ ExecutableFinder.exist?("pkg")
+ end
+ end
+
+ def target?(platform)
+ platform == "freebsd"
+ end
+
+ private
+ def install_command_line(package)
+ ["pkg", "install", "-y", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/gentoo-linux.rb b/lib/rubygems-requirements-system/platform/gentoo-linux.rb
new file mode 100644
index 0000000..1343e30
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/gentoo-linux.rb
@@ -0,0 +1,50 @@
+# Copyright (C) 2022-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class GentooLinux < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ case os_release.id
+ when "gentoo"
+ return true
+ else
+ return true if os_release.id_like.include?("gentoo")
+ end
+ false
+ end
+ end
+
+ def target?(platform)
+ platform == "gentoo_linux"
+ end
+
+ private
+ def install_command_line(package)
+ ["emerge", "--getbinpkg", "--usepkg", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/homebrew.rb b/lib/rubygems-requirements-system/platform/homebrew.rb
new file mode 100644
index 0000000..f873825
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/homebrew.rb
@@ -0,0 +1,43 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Homebrew < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ ExecutableFinder.exist?("brew")
+ end
+ end
+
+ def target?(platform)
+ platform == "homebrew"
+ end
+
+ private
+ def install_command_line(package)
+ ["brew", "install", package]
+ end
+
+ def need_super_user_priviledge?
+ false
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/macports.rb b/lib/rubygems-requirements-system/platform/macports.rb
new file mode 100644
index 0000000..0d6b9f1
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/macports.rb
@@ -0,0 +1,43 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class MacPorts < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ ExecutableFinder.exist?("port")
+ end
+ end
+
+ def target?(platform)
+ platform == "macports"
+ end
+
+ private
+ def install_command_line(package)
+ ["port", "install", "-y", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/pld-linux.rb b/lib/rubygems-requirements-system/platform/pld-linux.rb
new file mode 100644
index 0000000..5072704
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/pld-linux.rb
@@ -0,0 +1,43 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class PLDLinux < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ ExecutableFinder.exist?("poldek")
+ end
+ end
+
+ def target?(platform)
+ platform == "pld_linux"
+ end
+
+ private
+ def install_command_line(package)
+ ["poldek", "--up", "-u", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/red-hat-enterprise-linux.rb b/lib/rubygems-requirements-system/platform/red-hat-enterprise-linux.rb
new file mode 100644
index 0000000..d656bd0
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/red-hat-enterprise-linux.rb
@@ -0,0 +1,67 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class RedHatEnterpriseLinux < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id_like.include?("rhel")
+ end
+ end
+
+ def target?(platform)
+ case platform
+ when "rhel"
+ true
+ when "redhat" # For backward compatibility
+ true
+ else
+ false
+ end
+ end
+
+ private
+ def target_packages(requirement)
+ super +
+ requirement.packages.collect {|package| "pkgconfig(#{package.id})"}
+ end
+
+ def install_command_line(package)
+ if major_version >= 9
+ ["dnf", "install", "--enablerepo=crb", "-y", package]
+ elsif major_version >= 8
+ ["dnf", "install", "--enablerepo=powertools", "-y", package]
+ else
+ ["yum", "install", "-y", package]
+ end
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+
+ def major_version
+ major_version_string = File.read("/etc/redhat-release")[/(\d+)/, 0]
+ Integer(major_version_string, 10)
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/suse.rb b/lib/rubygems-requirements-system/platform/suse.rb
new file mode 100644
index 0000000..1127162
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/suse.rb
@@ -0,0 +1,51 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class SUSE < Base
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ os_release.id_like.include?("suse")
+ end
+ end
+
+ def target?(platform)
+ case platform
+ when "suse"
+ true
+ when "fedora", "rhel", "redhat"
+ true # Most packages have the same name with Fedora/RHEL's one
+ else
+ false
+ end
+ end
+
+ private
+ def install_command_line(package)
+ ["zypper", "--non-interactive", "install", package]
+ end
+
+ def need_super_user_priviledge?
+ true
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/ubuntu.rb b/lib/rubygems-requirements-system/platform/ubuntu.rb
new file mode 100644
index 0000000..15e394a
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/ubuntu.rb
@@ -0,0 +1,41 @@
+# Copyright (C) 2021-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "debian"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Ubuntu < Debian
+ Platform.register(self)
+
+ class << self
+ def current_platform?
+ os_release = OSRelease.new
+ case os_release.id
+ when "ubuntu"
+ return true
+ else
+ return true if os_release.id_like.include?("ubuntu")
+ end
+ false
+ end
+ end
+
+ def target?(platform)
+ platform == "ubuntu" || super
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/platform/unknown.rb b/lib/rubygems-requirements-system/platform/unknown.rb
new file mode 100644
index 0000000..baa503a
--- /dev/null
+++ b/lib/rubygems-requirements-system/platform/unknown.rb
@@ -0,0 +1,31 @@
+# Copyright (C) 2017-2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "base"
+
+module RubyGemsRequirementsSystem
+ module Platform
+ class Unknown < Base
+ def target?(platform)
+ false
+ end
+
+ private
+ def need_super_user_priviledge?
+ false
+ end
+ end
+ end
+end
diff --git a/lib/rubygems-requirements-system/version.rb b/lib/rubygems-requirements-system/version.rb
new file mode 100644
index 0000000..4fab162
--- /dev/null
+++ b/lib/rubygems-requirements-system/version.rb
@@ -0,0 +1,18 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+module RubyGemsRequirementsSystem
+ VERSION = "1.0.0"
+end
diff --git a/lib/rubygems_plugin.rb b/lib/rubygems_plugin.rb
new file mode 100644
index 0000000..30fd33b
--- /dev/null
+++ b/lib/rubygems_plugin.rb
@@ -0,0 +1,21 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "rubygems-requirements-system/installer"
+
+Gem.pre_install do |installer|
+ installer = RubyGemsRequirementsSystem::Installer.new(installer.spec)
+ installer.install
+end
diff --git a/rubygems-requirements-system.gemspec b/rubygems-requirements-system.gemspec
new file mode 100644
index 0000000..1194d91
--- /dev/null
+++ b/rubygems-requirements-system.gemspec
@@ -0,0 +1,42 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require_relative "lib/rubygems-requirements-system/version"
+
+Gem::Specification.new do |spec|
+ spec.name = "rubygems-requirements-system"
+ spec.version = RubyGemsRequirementsSystem::VERSION
+ spec.authors = ["Sutou Kouhei"]
+ spec.email = ["kou@clear-code.com"]
+ spec.summary = "Users can install system packages automatically on \"gem install\""
+ spec.description = <<-DESCRIPTION.strip
+Users need to install system packages to install an extension library
+that depends on system packages. It bothers users because users need to
+install system packages and an extension library separately.
+
+rubygems-requirements-system helps to install system packages on "gem install".
+Users can install both system packages and an extension library by one action,
+"gem install".
+ DESCRIPTION
+ spec.homepage = "https://github.com/ruby-gnome/rubygems-requirements-system"
+ spec.licenses = ["LGPL-3.0+"]
+ spec.require_paths = ["lib"]
+
+ spec.files = ["README.md", "Rakefile"]
+ spec.files += Dir.glob("lib/**/*.rb")
+ spec.files += Dir.glob("doc/text/**/*.*")
+
+ spec.add_runtime_dependency("pkg-config")
+end
diff --git a/test/fixture/dummy-cairo/dummy-cairo.gemspec b/test/fixture/dummy-cairo/dummy-cairo.gemspec
new file mode 100644
index 0000000..67b2d0d
--- /dev/null
+++ b/test/fixture/dummy-cairo/dummy-cairo.gemspec
@@ -0,0 +1,54 @@
+# -*- ruby -*-
+#
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+Gem::Specification.new do |spec|
+ spec.name = "dummy-cairo"
+ spec.version = "1.0.0"
+ spec.authors = ["Sutou Kouhei"]
+ spec.email = ["kou@cozmixng.org"]
+ spec.licenses = ["LGPL-3.0+"]
+ spec.summary = "Dummy gem that uses cairo"
+ spec.description = "This is for testing rubygems-requirements-system"
+ spec.extensions = ["ext/dummy-cairo/extconf.rb"]
+ spec.files = ["ext/dummy-cairo/extconf.rb"]
+
+ spec.add_runtime_dependency("rubygems-requirements-system")
+
+ spec.requirements << "system: cairo >= 1.2.0: alpine_linux: cairo-dev"
+ spec.requirements << "system: cairo >= 1.2.0: alt_linux: bzlib-devel"
+ spec.requirements << "system: cairo >= 1.2.0: alt_linux: libXdmcp-devel"
+ spec.requirements << "system: cairo >= 1.2.0: alt_linux: libbrotli-devel"
+ spec.requirements << "system: cairo >= 1.2.0: alt_linux: libcairo-devel"
+ spec.requirements << "system: cairo >= 1.2.0: alt_linux: libexpat-devel"
+ spec.requirements << "system: cairo >= 1.2.0: alt_linux: libpixman-devel"
+ spec.requirements << "system: cairo >= 1.2.0: arch_linux: cairo"
+ spec.requirements << "system: cairo >= 1.2.0: conda: cairo"
+ spec.requirements << "system: cairo >= 1.2.0: conda: expat"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-kbproto"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-libxau"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-libxext"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-libxrender"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-renderproto"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-xextproto"
+ spec.requirements << "system: cairo >= 1.2.0: conda: xorg-xproto"
+ spec.requirements << "system: cairo >= 1.2.0: conda: zlib"
+ spec.requirements << "system: cairo >= 1.2.0: debian: libcairo2-dev"
+ spec.requirements << "system: cairo >= 1.2.0: gentoo_linux: cairo"
+ spec.requirements << "system: cairo >= 1.2.0: homebrew: cairo"
+ spec.requirements << "system: cairo >= 1.2.0: macports: cairo"
+ spec.requirements << "system: cairo >= 1.2.0: rhel: cairo-devel"
+end
diff --git a/test/fixture/dummy-cairo/ext/dummy-cairo/extconf.rb b/test/fixture/dummy-cairo/ext/dummy-cairo/extconf.rb
new file mode 100644
index 0000000..65d3686
--- /dev/null
+++ b/test/fixture/dummy-cairo/ext/dummy-cairo/extconf.rb
@@ -0,0 +1,24 @@
+# Copyright (C) 2025 Ruby-GNOME Project Team
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program. If not, see .
+
+require "mkmf"
+
+require "pkg-config"
+
+unless PKGConfig.have_package("cairo")
+ exit(false)
+end
+
+create_makefile("dummy_cairo")