71 lines
2.4 KiB
Bash
Executable file
71 lines
2.4 KiB
Bash
Executable file
#!/usr/bin/env bash
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##
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# Pushes commits to a GitHub repo
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#
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# @author Daniel Rudolf
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# @link http://picocms.org
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# @license http://opensource.org/licenses/MIT
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#
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set -e
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# parameters
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CHECK_REPO_SLUG="$1" # optional GitHub repo (e.g. picocms/Pico) to check
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# its latest commit as basic race condition protection
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CHECK_REMOTE_REF="$2" # optional remote Git reference (e.g. heads/master)
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CHECK_LOCAL_COMMIT="$3" # optional local commit SHA1
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# print parameters
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echo "Deploying repo..."
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printf 'CHECK_REPO_SLUG="%s"\n' "$CHECK_REPO_SLUG"
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printf 'CHECK_REMOTE_REF="%s"\n' "$CHECK_REMOTE_REF"
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printf 'CHECK_LOCAL_COMMIT="%s"\n' "$CHECK_LOCAL_COMMIT"
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echo
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# check for changes
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if [ -z "$(git log --oneline '@{upstream}..')" ]; then
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printf 'Nothing to deploy; skipping...\n\n'
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exit 0
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fi
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# race condition protection for concurrent Travis builds
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# this is no definite protection (race conditions are still possible during `git push`),
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# but it should give a basic protection without disabling concurrent builds completely
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if [ -n "$CHECK_REPO_SLUG" ] && [ -n "$CHECK_REMOTE_REF" ] && [ -n "$CHECK_LOCAL_COMMIT" ]; then
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# retrieve information using GitHub APIv3
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printf 'Checking latest commit...\n'
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CHECK_API_URL="https://api.github.com/repos/$CHECK_REPO_SLUG/git/refs/$CHECK_REMOTE_REF"
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if [ -n "$GITHUB_OAUTH_TOKEN" ]; then
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CHECK_API_RESPONSE="$(wget -O- --header="Authorization: token $GITHUB_OAUTH_TOKEN" "$CHECK_API_URL" 2> /dev/null)"
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else
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CHECK_API_RESPONSE="$(wget -O- "$CHECK_API_URL" 2> /dev/null)"
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fi
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# evaluate JSON response
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CHECK_REMOTE_COMMIT="$(echo "$CHECK_API_RESPONSE" | php -r "
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\$json = json_decode(stream_get_contents(STDIN), true);
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if (\$json !== null) {
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if (isset(\$json['ref']) && (\$json['ref'] === 'refs/$CHECK_REMOTE_REF')) {
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if (isset(\$json['object']) && isset(\$json['object']['sha'])) {
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echo \$json['object']['sha'];
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}
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}
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}
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")"
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# compare source reference against the latest commit
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if [ "$CHECK_REMOTE_COMMIT" != "$CHECK_LOCAL_COMMIT" ]; then
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echo "Latest local commit '$CHECK_LOCAL_COMMIT' doesn't match latest remote commit '$CHECK_REMOTE_COMMIT'; aborting..." >&2
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exit 1
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fi
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echo
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fi
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# push changes
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printf 'Pushing changes...\n'
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git push
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echo
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