buildbot: Add script to automatically perform builds on git repositories

This commit adds a script that can be used to watch a git repository for
changes and automatically perform a task if a change has been detected.

diff --git a/buildbot.sh b/buildbot.sh
new file mode 100644 (file)
index 0000000..a8f58e1
--- /dev/null
+++ b/buildbot.sh
@@ -0,0 +1,146 @@
+#!/bin/bash
+
+sem="buildbot"
+
+build_packages() {
+       local sourcetree="$1"
+       local gpgkey="$2"
+
+       local output
+       local package
+       local npkgs
+
+       npkgs=0
+
+       if ! output=(cd "$sourcetree" && dpkg-buildpackage --sign-key="$gpgkey"); then
+               log_error "Could not build $sourcetree"
+               echo "$output" | log_highlight "dpkg-buildpackage" | log_error
+
+               return 1
+       fi
+
+       while read -r package; do
+               if ! output=$(dpkg-sig --sign builder -k "$gpgkey" "$package"); then
+                       log_error "Could not sign $package"
+                       echo "output" | log_highlight "dpkg-sig" | log_error
+                       return 1
+               fi
+
+               if ! realpath "$package"; then
+                       log_error "Could not normalize path $package"
+                       return 1
+               fi
+
+               ((npkgs++))
+       done < <(find "$sourcetree/.." -mindepth 1 -maxdepth 1 -type f -iname "*.deb")
+
+       if (( npkgs == 0 )); then
+               return 1
+       fi
+
+       return 0
+}
+
+queue_put_package() {
+       local queue="$1"
+
+       local lock
+       local sem
+
+       lock="$queue/lock"
+       sem="$queue/sem"
+
+       if ! mutex_lock "$lock"; then
+               log_error "Could not acquire lock on $queue"
+               return 1
+       fi
+
+       log_info "Moving $package to $queue"
+       if ! mv "$package" "$queue/queue"; then
+               log_error "Could not move $package"
+       else
+               if ! sem_post "$sem"; then
+                       log_error "Could not post semaphore $sem"
+               fi
+       fi
+
+       mutex_unlock "$lock"
+
+       return 0
+}
+
+move_packages() {
+       local queue="$1"
+
+       local lock
+       local sem
+
+       lock="$resultdir/lock"
+       sem="$resultdir/queued"
+
+       while read -r package; do
+               queue_put_package "$queue" "$package"
+       done
+
+       return 0
+}
+
+build_repository() {
+       local repository="$1"
+       local gpgkey="$2"
+       local resultdir="$3"
+
+       local buildroot
+       local packages
+       local err
+
+       err=1
+
+       if ! buildroot=$(mktemp -d); then
+               log_error "Could not create buildroot"
+               return 1
+       fi
+
+       if ! git clone "$repository" "$buildroot/source" &>/dev/null; then
+               log_error "Could not checkout source"
+       elif ! packages=$(build_packages "$buildroot/source" "$gpgkey"); then
+               log_error "Could not build package"
+       elif ! move_packages "$resultdir" <<< "$packages"; then
+               log_error "Could not move packages"
+       else
+               log_info "Build succeeded: $repository"
+               err=0
+       fi
+
+       if ! rm -rf "$buildroot"; then
+               log_error "Could not clean up $buildroot"
+       fi
+
+       return "$err"
+}
+
+
+main() {
+       opt_add_arg "k" "gpgkey"     "yes" "" "The GPG key id to use"
+       opt_add_arg "q" "queue"      "yes" "" "The queue where new packages should be placed"
+       opt_add_arg "r" "repository" "yes" "" "The repository to watch"
+
+       if ! opt_parse "$@"; then
+               return 1
+       fi
+
+       return 0
+}
+
+{
+       if ! . toolbox.sh; then
+               exit 1
+       fi
+
+       if ! include "log" "opt" "conf" "sem"; then
+               exit 1
+       fi
+
+       main "$@"
+       exit "$?"
+}