set -euo pipefail

mode="${1:-code}"

base_sha="${2:-${BASE_SHA:-}}"

head_sha="${3:-${HEAD_SHA:-}}"

if [ -z "${GITHUB_OUTPUT:-}" ]; then

echo "GITHUB_OUTPUT is not set." >&2

exit 1

unknown_changes() {

}

if [[ "$mode" = docs-only || "$mode" = docs-deploy ]] && { [ -z "$base_sha" ] || [ -z "$head_sha" ]; }; then

unknown_changes

if [ -z "$head_sha" ]; then

head_sha="$(git rev-parse HEAD 2>/dev/null || true)"

if [ -z "$base_sha" ]; then

if ! git rev-parse --verify origin/main >/dev/null 2>&1; then

git fetch --no-tags --depth=1 origin main || true

fi

if git rev-parse --verify origin/main >/dev/null 2>&1 && [ -n "$head_sha" ]; then

base_sha="$(git merge-base origin/main "$head_sha" 2>/dev/null || true)"

fi

if [ -z "$base_sha" ] || [ -z "$head_sha" ]; then

unknown_changes

if [ "$base_sha" = "0000000000000000000000000000000000000000" ]; then

unknown_changes

for sha in "$base_sha" "$head_sha"; do

if ! git cat-file -e "$sha^{commit}" 2>/dev/null; then

git fetch --no-tags --depth=1 origin "$sha" || true

fi

if ! git cat-file -e "$sha^{commit}" 2>/dev/null; then

unknown_changes

fi

changed_files=$(mktemp)

trap 'rm -f "$changed_files"' EXIT

if ! git diff --name-only --no-renames -z "$base_sha" "$head_sha" -- > "$changed_files"; then

unknown_changes

docs_pattern='^(docs/|mkdocs\.yml$)'

if [ "$mode" = "docs-deploy" ]; then

while IFS= read -r -d '' path; do

if [[ "$path" = uv.lock || "$path" = .github/workflows/docs.yml ]]; then

echo "run=true" >> "$GITHUB_OUTPUT"

exit 0

fi

done < "$changed_files"

mode=docs-only

case "$mode" in

code)

pattern='^(\.github/release/|src/|tests/|integration_tests/|examples/|docs/scripts/|\.agents/skills/(code-change-verification|examples-auto-run|examples-run-analysis|integration-tests)/|\.github/scripts/|\.github/workflows/(tests|docs|publish|repo-skills|release-please|release-candidate|release-readiness|release-readiness-refresh)\.yml$|release-please-config\.json$|\.release-please-manifest\.json$|pyproject\.toml$|uv\.lock$|Makefile$|pyrightconfig\.json$)'

;;

docs)

pattern='^(docs/|mkdocs\.yml$|uv\.lock$|\.github/workflows/docs\.yml$)'

;;

docs-only)

pattern="$docs_pattern"

;;

*)

pattern="$mode"

;;

run=false

while IFS= read -r -d '' path; do

if [[ "$path" =~ $pattern ]]; then

run=true

elif [ "$mode" = "docs-only" ]; then

run=false

break

fi

done < "$changed_files"

echo "run=$run" >> "$GITHUB_OUTPUT"