#!/usr/bin/env bash set -euo pipefail INITIAL_COMMIT="false" GITHUB_OUTPUT=${GITHUB_OUTPUT:-""} EXTRA_ARGS="--no-tags" PREVIOUS_SHA="" CURRENT_SHA="" DIFF="..." if [[ "$GITHUB_REF" == "refs/tags/"* ]]; then EXTRA_ARGS="" fi if [[ "$GITHUB_EVENT_HEAD_REPO_FORK" == "true" ]]; then DIFF=".." fi echo "::group::changed-files-diff-sha" if [[ -n $INPUT_PATH ]]; then REPO_DIR="$GITHUB_WORKSPACE/$INPUT_PATH" echo "::debug::Resolving repository path: $REPO_DIR" if [[ ! -d "$REPO_DIR" ]]; then echo "::error::Invalid repository path: $REPO_DIR" exit 1 fi cd "$REPO_DIR" fi function __version() { echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }'; } echo "Verifying git version..." GIT_VERSION=$(git --version | awk '{print $3}') && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::git not installed" exit 1 fi if [[ $(__version "$GIT_VERSION") -lt $(__version "2.18.0") ]]; then echo "::error::Invalid git version. Please upgrade ($GIT_VERSION) to >= (2.18.0)" exit 1 else echo "Valid git version found: ($GIT_VERSION)" fi if [[ -z $GITHUB_BASE_REF ]]; then echo "Running on a push event..." TARGET_BRANCH=$GITHUB_REFNAME CURRENT_BRANCH=$TARGET_BRANCH echo "::debug::Getting HEAD SHA..." if [[ -n "$INPUT_UNTIL" ]]; then echo "::debug::Getting HEAD SHA for '$INPUT_UNTIL'..." CURRENT_SHA=$(git log -1 --format="%H" --date=local --until="$INPUT_UNTIL") && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::Invalid until date: $INPUT_UNTIL" exit 1 fi else if [[ -z $INPUT_SHA ]]; then CURRENT_SHA=$(git rev-list -n 1 HEAD 2>&1) && exit_status=$? || exit_status=$? else # shellcheck disable=SC2086 git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin "$CURRENT_BRANCH" CURRENT_SHA=$INPUT_SHA; exit_status=$? fi fi echo "::debug::Verifying the current commit SHA: $CURRENT_SHA" git rev-parse --quiet --verify "$CURRENT_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::Unable to locate the current sha: $CURRENT_SHA" echo "::error::Please verify that current sha is valid, and increase the fetch_depth to a number higher than $INPUT_FETCH_DEPTH." exit 1 else echo "::debug::Current SHA: $CURRENT_SHA" fi if [[ -z $INPUT_BASE_SHA ]]; then if [[ -n "$INPUT_SINCE" ]]; then echo "::debug::Getting base SHA for '$INPUT_SINCE'..." PREVIOUS_SHA=$(git log --format="%H" --date=local --since="$INPUT_SINCE" | tail -1) && exit_status=$? || exit_status=$? if [[ -z "$PREVIOUS_SHA" ]]; then echo "::error::Unable to locate a previous commit for the specified date: $INPUT_SINCE" exit 1 fi else if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "true" ]]; then PREVIOUS_SHA="" if [[ "$GITHUB_EVENT_FORCED" == "false" || -z "$GITHUB_EVENT_FORCED" ]]; then PREVIOUS_SHA=$GITHUB_EVENT_BEFORE fi else PREVIOUS_SHA=$(git rev-list -n 1 "$TARGET_BRANCH" 2>&1) && exit_status=$? || exit_status=$? if [[ -z "$PREVIOUS_SHA" ]]; then if [[ "$GITHUB_EVENT_FORCED" == "false" || -z "$GITHUB_EVENT_FORCED" ]]; then PREVIOUS_SHA=$GITHUB_EVENT_BEFORE fi fi fi if [[ -z "$PREVIOUS_SHA" || "$PREVIOUS_SHA" == "0000000000000000000000000000000000000000" ]]; then PREVIOUS_SHA=$(git rev-parse "$(git branch -r --sort=-committerdate | head -1 | xargs)") fi if [[ "$PREVIOUS_SHA" == "$CURRENT_SHA" ]]; then if ! git rev-parse "$PREVIOUS_SHA^1" &>/dev/null; then INITIAL_COMMIT="true" PREVIOUS_SHA=$(git rev-parse "$CURRENT_SHA") echo "::warning::Initial commit detected no previous commit found." else PREVIOUS_SHA=$(git rev-parse "$PREVIOUS_SHA^1") fi else if [[ -z "$PREVIOUS_SHA" ]]; then echo "::error::Unable to locate a previous commit." exit 1 fi fi fi else # shellcheck disable=SC2086 git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin "$CURRENT_BRANCH" PREVIOUS_SHA=$INPUT_BASE_SHA fi echo "::debug::Target branch $TARGET_BRANCH..." echo "::debug::Current branch $CURRENT_BRANCH..." echo "::debug::Verifying the previous commit SHA: $PREVIOUS_SHA" git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::Unable to locate the previous sha: $PREVIOUS_SHA" echo "::error::Please verify that the previous sha commit is valid, and increase the fetch_depth to a number higher than $INPUT_FETCH_DEPTH." exit 1 fi else echo "Running on a pull request event..." TARGET_BRANCH=$GITHUB_BASE_REF CURRENT_BRANCH=$GITHUB_HEAD_REF if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "true" ]]; then TARGET_BRANCH=$CURRENT_BRANCH fi echo "Fetching remote refs..." if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "false" ]]; then # shellcheck disable=SC2086 git fetch -u --progress $EXTRA_ARGS --depth="$INPUT_FETCH_DEPTH" origin +refs/heads/"$TARGET_BRANCH":refs/remotes/origin/"$TARGET_BRANCH" 1>/dev/null git branch --track "$TARGET_BRANCH" origin/"$TARGET_BRANCH" 2>/dev/null || true else # shellcheck disable=SC2086 git fetch $EXTRA_ARGS -u --progress --depth="$INPUT_FETCH_DEPTH" origin +"$GITHUB_REF":refs/remotes/origin/"$CURRENT_BRANCH" fi echo "::debug::Getting HEAD SHA..." if [[ -n "$INPUT_UNTIL" ]]; then echo "::debug::Getting HEAD SHA for '$INPUT_UNTIL'..." CURRENT_SHA=$(git log -1 --format="%H" --date=local --until="$INPUT_UNTIL") && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::Invalid until date: $INPUT_UNTIL" exit 1 fi else if [[ -z $INPUT_SHA ]]; then CURRENT_SHA=$(git rev-list --no-merges -n 1 HEAD 2>&1) && exit_status=$? || exit_status=$? else CURRENT_SHA=$INPUT_SHA; exit_status=$? fi fi echo "::debug::Verifying the current commit SHA: $CURRENT_SHA" git rev-parse --quiet --verify "$CURRENT_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::Unable to locate the current sha: $CURRENT_SHA" echo "::error::Please verify that current sha is valid, and increase the fetch_depth to a number higher than $INPUT_FETCH_DEPTH." exit 1 else echo "::debug::Current SHA: $CURRENT_SHA" fi if [[ -z $INPUT_BASE_SHA ]]; then if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "true" ]]; then PREVIOUS_SHA=$GITHUB_EVENT_BEFORE if ! git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1; then # shellcheck disable=SC2046 PREVIOUS_SHA=$(git rev-parse origin/"$CURRENT_BRANCH" 2>&1) && exit_status=$? || exit_status=$? fi else PREVIOUS_SHA=$GITHUB_EVENT_PULL_REQUEST_BASE_SHA if ! git diff --name-only --ignore-submodules=all "$PREVIOUS_SHA$DIFF$CURRENT_SHA" 1>/dev/null 2>&1; then PREVIOUS_SHA=$(git merge-base "$PREVIOUS_SHA" "$CURRENT_SHA" 2>&1) && exit_status=$? || exit_status=$? fi fi if [[ -z "$PREVIOUS_SHA" || "$PREVIOUS_SHA" == "$CURRENT_SHA" ]]; then PREVIOUS_SHA=$GITHUB_EVENT_PULL_REQUEST_BASE_SHA && exit_status=$? || exit_status=$? fi if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "false" ]]; then if [[ -f .git/shallow ]]; then depth=$INPUT_FETCH_DEPTH max_depth=$INPUT_MAX_FETCH_DEPTH for ((i=0; i/dev/null 2>&1; then break fi done if ((i >= max_depth)); then echo "::error::Unable to locate a common ancestor between $TARGET_BRANCH and $CURRENT_BRANCH with: $PREVIOUS_SHA$DIFF$CURRENT_SHA" exit 1 fi else echo "::debug::Not a shallow clone, skipping merge-base check." fi fi echo "::debug::Previous SHA: $PREVIOUS_SHA" else PREVIOUS_SHA=$INPUT_BASE_SHA && exit_status=$? || exit_status=$? fi echo "::debug::Target branch: $TARGET_BRANCH" echo "::debug::Current branch: $CURRENT_BRANCH" echo "::debug::Verifying the previous commit SHA: $PREVIOUS_SHA" git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$? if [[ $exit_status -ne 0 ]]; then echo "::error::Unable to locate the previous sha: $PREVIOUS_SHA" echo "::error::Please verify that the previous sha is valid, and increase the fetch_depth to a number higher than $INPUT_FETCH_DEPTH." exit 1 fi fi if [[ "$PREVIOUS_SHA" == "$CURRENT_SHA" && "$INITIAL_COMMIT" == "false" ]]; then echo "::error::Similar commit hashes detected: previous sha: $PREVIOUS_SHA is equivalent to the current sha: $CURRENT_SHA." echo "::error::Please verify that both commits are valid, and increase the fetch_depth to a number higher than $INPUT_FETCH_DEPTH." exit 1 fi if [[ -z "$GITHUB_OUTPUT" ]]; then echo "::set-output name=target_branch::$TARGET_BRANCH" echo "::set-output name=current_branch::$CURRENT_BRANCH" echo "::set-output name=previous_sha::$PREVIOUS_SHA" echo "::set-output name=current_sha::$CURRENT_SHA" else cat <> "$GITHUB_OUTPUT" target_branch=$TARGET_BRANCH current_branch=$CURRENT_BRANCH previous_sha=$PREVIOUS_SHA current_sha=$CURRENT_SHA EOF fi echo "::endgroup::"