Remove travis caching and avoid rate limiting. (#962)

The caching only saves a few minutes and seems brittle.

.travis.yml

@@ -1,29 +1,19 @@
 sudo: required
 services: docker
 
-# Cache intermediate Docker layers. For a description of how this works, see:
-# https://giorgos.sealabs.net/docker-cache-on-travis-and-docker-112.html
-cache:
-  directories:
-    - /home/travis/docker/
-
 env:
-  matrix:
-  - VIM_VERSION="7.4" PYTHON_IMAGE=2.7-stretch TAG=vim_74_py2 DOCKER_CACHE_FILE=/home/travis/docker/vim_74_py2.tar.gz
-  - VIM_VERSION="8.0" PYTHON_IMAGE=2.7-stretch TAG=vim_80_py2 DOCKER_CACHE_FILE=/home/travis/docker/vim_80_py2.tar.gz
-  - VIM_VERSION="git" PYTHON_IMAGE=2.7-stretch TAG=vim_git_py2 DOCKER_CACHE_FILE=/home/travis/docker/vim_git_py2.tar.gz
-  - VIM_VERSION="7.4" PYTHON_IMAGE=3.6-stretch TAG=vim_74_py3 DOCKER_CACHE_FILE=/home/travis/docker/vim_74_py3.tar.gz
-  - VIM_VERSION="8.0" PYTHON_IMAGE=3.6-stretch TAG=vim_80_py3 DOCKER_CACHE_FILE=/home/travis/docker/vim_80_py3.tar.gz
-  - VIM_VERSION="git" PYTHON_IMAGE=3.6-stretch TAG=vim_git_py3 DOCKER_CACHE_FILE=/home/travis/docker/vim_git_py3.tar.gz
-  global:
-    secure: PFU1Md8NuN6SQNjx6SsHX7icS9Tacb0xS0Ue9SHll1U7FNdI90F/gnokR6v+j7sdvoiLkwRSwUXeYUmrZS/d9qq8yiRxuqcj/Y0TfHVKqcLXXV/m9xWAN2UKRVF7Z1neerznk52Roo3IRqwgd9U+6d3bTthHKKYg4azBqTM7AFE=
-before_install: docker/load_docker_cache.sh
+  - VIM_VERSION="7.4" PYTHON_IMAGE=2.7-stretch TAG=vim_74_py2
+  - VIM_VERSION="8.0" PYTHON_IMAGE=2.7-stretch TAG=vim_80_py2
+  - VIM_VERSION="git" PYTHON_IMAGE=2.7-stretch TAG=vim_git_py2
+  - VIM_VERSION="7.4" PYTHON_IMAGE=3.6-stretch TAG=vim_74_py3
+  - VIM_VERSION="8.0" PYTHON_IMAGE=3.6-stretch TAG=vim_80_py3
+  - VIM_VERSION="git" PYTHON_IMAGE=3.6-stretch TAG=vim_git_py3
+
 install:
-   - docker build -t ultisnips:${TAG} --build-arg PYTHON_IMAGE=${PYTHON_IMAGE} --build-arg VIM_VERSION=${VIM_VERSION} --build-arg GITHUB_ACCESS_TOKEN=${GITHUB_ACCESS_TOKEN} .
+   - docker build -t ultisnips:${TAG} --build-arg PYTHON_IMAGE=${PYTHON_IMAGE} --build-arg VIM_VERSION=${VIM_VERSION} .
 
 script:
    - docker run -it ultisnips:${TAG} docker/run_tests.sh
-   - docker/save_docker_cache.sh
 
 notifications:
   webhooks:

Dockerfile

@@ -3,7 +3,6 @@ ARG PYTHON_IMAGE
 FROM python:${PYTHON_IMAGE}
 
 ARG VIM_VERSION
-ARG GITHUB_ACCESS_TOKEN
 
 COPY docker/install_packages.sh src/scripts/
 RUN src/scripts/install_packages.sh
@@ -12,26 +11,9 @@ RUN src/scripts/download_vim.sh
 COPY docker/build_vim.sh src/scripts/
 RUN src/scripts/build_vim.sh
 
-# We clone the plugins we currently depend on manually here. Initially we check
-# if their master has changed since last time we build, this will invalidate
-# the cache.
-RUN mkdir -p /tmp/UltiSnips_test_vim_plugins
-
-ADD https://api.github.com/repos/tpope/vim-pathogen/git/refs/heads/master?access_token=$GITHUB_ACCESS_TOKEN \
-    /src/scripts/vim-pathogen_version.json
-RUN git clone --recursive --depth 1 https://github.com/tpope/vim-pathogen /tmp/UltiSnips_test_vim_plugins/vim-pathogen
-
-ADD https://api.github.com/repos/ervandew/supertab/git/refs/heads/master?access_token=$GITHUB_ACCESS_TOKEN \
-    /src/scripts/supertab_version.json
-RUN git clone --recursive --depth 1 https://github.com/ervandew/supertab /tmp/UltiSnips_test_vim_plugins/supertab
-
-# Unidecode is not a Vim plugin, but a Python library we depend on. We also
-# install the latest version through pip. But we still use GitHub activity as a
-# marker to invalidate the installation step, just to make sure we occasionally
-# reinstall a new version.
-ADD https://api.github.com/repos/avian2/unidecode/git/refs/heads/master?access_token=$GITHUB_ACCESS_TOKEN \
-    /src/scripts/unidecode_version.json
 RUN pip install unidecode
 
 COPY . /src/UltiSnips
 WORKDIR /src/UltiSnips
+
+RUN ./test_all.py --clone-plugins