Remove Bionic from future releases (Garden+)

.github/workflows/ci.yml

@@ -3,17 +3,6 @@ name: Ubuntu CI
 on: [push, pull_request]
 
 jobs:
-  bionic-ci:
-    runs-on: ubuntu-latest
-    name: Ubuntu Bionic CI
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Compile and test
-        id: ci
-        uses: ignition-tooling/action-ignition-ci@bionic
-        with:
-          codecov-enabled: true
   focal-ci:
     runs-on: ubuntu-latest
     name: Ubuntu Focal CI
@@ -23,3 +12,7 @@ jobs:
       - name: Compile and test
         id: ci
         uses: ignition-tooling/action-ignition-ci@focal
+        with:
+          codecov-enabled: true
+          cppcheck-enabled: true
+          cpplint-enabled: true

README.md

@@ -10,7 +10,7 @@
 Build | Status
 -- | --
 Test coverage | [![codecov](https://codecov.io/gh/ignitionrobotics/ign-gazebo/branch/main/graph/badge.svg)](https://codecov.io/gh/ignitionrobotics/ign-gazebo)
-Ubuntu Bionic | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=ignition_gazebo-ci-main-bionic-amd64)](https://build.osrfoundation.org/job/ignition_gazebo-ci-main-bionic-amd64)
+Ubuntu Focal | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=ignition_gazebo-ci-main-focal-amd64)](https://build.osrfoundation.org/job/ignition_gazebo-ci-main-focal-amd64)
 Homebrew      | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=ignition_gazebo-ci-main-homebrew-amd64)](https://build.osrfoundation.org/job/ignition_gazebo-ci-main-homebrew-amd64)
 Windows       | [![Build Status](https://build.osrfoundation.org/job/ign_gazebo-ci-win/badge/icon)](https://build.osrfoundation.org/job/ign_gazebo-ci-win/)
 

docker/README.md

@@ -110,15 +110,9 @@ Docker has two available versions: Community Edition (CE) and Enterprise Edition
         # Add the official GPG key of Docker
         curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
 
-1. Setup Docker using 1 of the two options below.
+1. Setup Docker.
 
-    1. Ubuntu Bionic users
-
-            sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) edge"
-
-    1. Everyone else.
-
-            sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+        sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
 
 1. Install Docker
 

tutorials/install.md

@@ -18,7 +18,7 @@ Throughout this tutorial, be sure to replace `<#>` with a number value, such as
 
 ## Binary Install
 
-### Ubuntu 18.04 or above
+### Ubuntu 20.04 or above
 
 The binary install method will use pre-built packages which are typically
 available through a package management utility such as [Apt](https://wiki.debian.org/Apt).
@@ -57,7 +57,7 @@ installing Ignition Gazebo from source.
 Install from source if you're interested in changing the source code or need a
 feature which hasn't been released yet.
 
-### Ubuntu 18.04 or above
+### Ubuntu 20.04 or above
 
 1. Install tools
   ```
@@ -82,13 +82,7 @@ feature which hasn't been released yet.
     $(sort -u $(find . -iname 'packages-'`lsb_release -cs`'.apt' -o -iname 'packages.apt' | tr '\n' ' '))
   ```
 
-5. (Ubuntu 18.04 only) Configure gcc8
-  ```
-  sudo apt-get install g++-8
-  sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800 --slave /usr/bin/g++ g++ /usr/bin/g++-8 --slave /usr/bin/gcov gcov /usr/bin/gcov-8
-  ```
-
-6. Configure and build.
+5. Configure and build.
   ```
   cd ign-gazebo
   mkdir build