I currently have a handful of containerized apps that I maintain in a shared repository and a few more that are in their own repositories. I wanted to be able to trigger builds of all my container projects from a single post-receive hook so I leaned on the work I did previously cleaning up my git hooks and created a script that will look in the root of the repository for a Dockerfile and if it finds one will launch a builder container using the same python script that I wrote about previously.
Now any time I push to master the post-receive hook will launch a container which will build the container, push it to my private registry and export a copy to a tarball on an internal website. This simplifies my work flow quite a bit as I no longer have to remember to run make(1) after I commit my work.
If you are interested, the hooks are available
in my misc git repository. The one you are interested is likely
post-receive.d/build-single-container. There is a slightly more complex
script that runs in the shared repository that is able to call builders for
any project inside the repository that needs building. That script is below.
#!/bin/sh # container post-receive hook # (c) 2019 Matthew J. Ernisse <matt@going-flying.com> # All Rights Reserved. # set -e GIT_AUTHOR="" GIT_BRANCH="" GIT_DIR=$(git rev-parse --git-dir 2>/dev/null) PROJECTS="" REV=0 add_to() { local global_var new_var # $1 may be blank on first iter if [ -z "$2" ]; then echo "$1" return fi global_var="$1" new_var="$2" for x in $global_var; do if [ "$x" = "$new_var" ]; then echo "$global_var" return fi done echo "$global_var $new_var" return } try_container() { if [ -z "$1" ]; then echo "usage: try_container project" return 1 fi echo "*** Launching builder for $1" /srv/git/global-hooks/start-container-builder.py \ "$1" "$REV" "$GIT_AUTHOR" } if [ -z "$GIT_DIR" ]; then echo >&2 "fatal: post-receive GIT_DIR not set" exit 1 fi while read oldrev newrev refname; do GIT_BRANCH=$refname REV=$newrev done GIT_AUTHOR=$(git show --format='%ae' --no-patch $REV) for fn in $(git diff-tree --no-commit-id --name-only -r $REV); do PROJECTS="$(add_to $PROJECTS $(dirname $fn))" done if [ ! "$GIT_BRANCH" = "refs/heads/master" ]; then echo "*** Non master commit (${GIT_BRANCH}), refusing to build..." exit fi if [ -n "$PROJECTS" ]; then for project in $PROJECTS; do if [ -z "$project" ]; then continue fi if [ "$project" = "." ]; then continue fi try_container "$project" done fi
I hope this helps you or at least proves that you do not need a large and complex CI/CD system for small projects, git comes with all the pieces you need built in.