131 lines
4.6 KiB
Bash
131 lines
4.6 KiB
Bash
#!/usr/bin/env bash
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# Steps of the reusable workflow .gitea/workflows/code-metrics.yml (ADR-0010).
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# The workflow checks out the calling repository, fetches this file into
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# shared-scripts/ and runs one command per step:
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#
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# code-metrics.sh validate check the inputs, before anything is counted
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# code-metrics.sh measure count the code, read the coverage report and
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# write the badge files (count_loc.py, badges.py)
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# code-metrics.sh publish commit the badge files to the badges branch,
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# and nothing when none of them changed
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#
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# Settings come from the environment, never from interpolated expressions:
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# WORKING_DIRECTORY, EXCLUDE, COVERAGE_REPORT, COVERAGE_WARN, COVERAGE_GOOD,
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# BADGES_BRANCH, BADGES_OUT (the directory of the badge files; a temporary
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# directory under RUNNER_TEMP by default).
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# Every failure is printed as ::error::[category] message.
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TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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OUT_DIR="${BADGES_OUT:-${RUNNER_TEMP:-/tmp}/code-metrics}"
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ALLOWED_FILES='^(code-files\.svg|code-lines\.svg|coverage\.svg|code-metrics\.json)$'
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COMMIT_MESSAGE="Update code metrics badges [skip ci]"
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fail() {
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echo "::error::[configuration] $1"
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exit 1
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}
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relative_path() {
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case "$1" in
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"" | /* | .. | ../* | */.. | */../*) return 1 ;;
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esac
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}
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validate_inputs() {
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set -u
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relative_path "$WORKING_DIRECTORY" ||
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fail "working-directory must be a relative path inside the repository."
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[ -d "$WORKING_DIRECTORY" ] ||
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fail "working-directory '$WORKING_DIRECTORY' does not exist."
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if [ -n "$COVERAGE_REPORT" ]; then
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relative_path "$COVERAGE_REPORT" ||
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fail "coverage-report must be a relative path inside the repository."
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fi
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case "$BADGES_BRANCH" in
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main | master | HEAD | "") fail "badges-branch '$BADGES_BRANCH' must not be a default branch." ;;
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esac
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git check-ref-format --branch "$BADGES_BRANCH" > /dev/null 2>&1 ||
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fail "badges-branch '$BADGES_BRANCH' is not a valid branch name."
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echo "Counting ${WORKING_DIRECTORY}; badges go to the branch ${BADGES_BRANCH}"
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}
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measure() {
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set -eu
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metrics="$(mktemp)"
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python3 "$TOOLS_DIR/count_loc.py" \
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--directory "$WORKING_DIRECTORY" --exclude "$EXCLUDE" --output "$metrics"
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rm -rf "$OUT_DIR"
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python3 "$TOOLS_DIR/badges.py" \
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--metrics "$metrics" --output-dir "$OUT_DIR" \
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--coverage-report "$COVERAGE_REPORT" \
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--coverage-warn "$COVERAGE_WARN" --coverage-good "$COVERAGE_GOOD"
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rm -f "$metrics"
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}
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# Copy the badge files into the worktree and stage them; return 0 when
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# something differs from the branch.
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stage_files() {
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local worktree="$1" file
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for file in "$OUT_DIR"/*; do
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cp "$file" "$worktree/$(basename "$file")"
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done
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git -C "$worktree" add -- .
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! git -C "$worktree" diff --cached --quiet
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}
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commit_files() {
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git -C "$1" -c user.name="code-metrics" -c user.email="code-metrics@invalid" \
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commit --quiet -m "$COMMIT_MESSAGE"
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}
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publish() {
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set -eu
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[ -d "$OUT_DIR" ] || fail "no badge files in '$OUT_DIR'; run measure first."
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local worktree exists=0 committed=0 attempt
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worktree="$(mktemp -d)"
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if git fetch --quiet origin "+refs/heads/$BADGES_BRANCH:refs/remotes/origin/$BADGES_BRANCH" 2> /dev/null; then
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exists=1
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if git ls-tree -r --name-only "origin/$BADGES_BRANCH" | grep -qvE "$ALLOWED_FILES"; then
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fail "branch '$BADGES_BRANCH' holds files that are not badge files; it is not a badges branch."
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fi
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git worktree add --quiet --detach "$worktree" "origin/$BADGES_BRANCH"
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else
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git worktree add --quiet --detach "$worktree" HEAD
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git -C "$worktree" checkout --quiet --orphan "$BADGES_BRANCH"
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git -C "$worktree" rm -rfq --ignore-unmatch .
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fi
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for attempt in 1 2; do
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if [ "$committed" -eq 0 ]; then
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if stage_files "$worktree"; then
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commit_files "$worktree"
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committed=1
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elif [ "$exists" -eq 1 ]; then
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echo "Badges are current; nothing to commit."
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break
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fi
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fi
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if git -C "$worktree" push --quiet origin "HEAD:refs/heads/$BADGES_BRANCH"; then
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echo "Published the badges to the branch ${BADGES_BRANCH}."
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break
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fi
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[ "$attempt" -lt 2 ] || fail "the push to '$BADGES_BRANCH' failed twice."
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if git fetch --quiet origin "+refs/heads/$BADGES_BRANCH:refs/remotes/origin/$BADGES_BRANCH" 2> /dev/null; then
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git -C "$worktree" reset --quiet --hard "origin/$BADGES_BRANCH"
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exists=1
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committed=0
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fi
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done
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git worktree remove --force "$worktree"
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}
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case "${1:-}" in
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validate) validate_inputs ;;
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measure) measure ;;
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publish) publish ;;
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*)
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echo "::error::[configuration] usage: code-metrics.sh validate|measure|publish" >&2
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exit 2
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;;
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esac
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