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diff-sha.sh
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diff-sha.sh
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#!/usr/bin/env bash
set -eu
INITIAL_COMMIT="false"
GITHUB_OUTPUT=${GITHUB_OUTPUT:-""}
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
echo "Verifying git version..."
function __version() {
echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }';
}
GIT_VERSION=$(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 $(__version "2.18.0") ]]; then
echo "::error::Invalid git version. Please upgrade git ($GIT_VERSION) to >= (2.18.0)"
exit 1
else
echo "Valid git version found: ($GIT_VERSION)"
fi
echo "::debug::Getting HEAD SHA..."
if [[ -z $INPUT_SHA ]]; then
if [[ -n "$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: $INPUT_UNTIL"
exit 1
fi
else
CURRENT_SHA=$(git rev-list -n 1 "HEAD" 2>&1) && exit_status=$? || exit_status=$?
fi
else
CURRENT_SHA=$INPUT_SHA; exit_status=$?
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::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
exit 1
else
echo "::debug::Current SHA: $CURRENT_SHA"
fi
if [[ -z $GITHUB_BASE_REF ]]; then
echo "Running on a push event..."
TARGET_BRANCH=${GITHUB_REF/refs\/heads\//} && exit_status=$? || exit_status=$?
CURRENT_BRANCH=$TARGET_BRANCH && exit_status=$? || exit_status=$?
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: $INPUT_SINCE"
exit 1
fi
else
git fetch --no-tags -u --progress origin --depth="$INPUT_TARGET_BRANCH_FETCH_DEPTH" "${TARGET_BRANCH}":"${TARGET_BRANCH}" && exit_status=$? || exit_status=$?
PREVIOUS_SHA=""
if [[ "$GITHUB_EVENT_FORCED" == "false" ]]; then
PREVIOUS_SHA=$GITHUB_EVENT_BEFORE
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
PREVIOUS_SHA=$(git rev-parse "$CURRENT_SHA^1")
if [[ "$PREVIOUS_SHA" == "$CURRENT_SHA" ]]; then
INITIAL_COMMIT="true"
echo "::debug::Initial commit detected"
fi
fi
if [[ -z "$PREVIOUS_SHA" ]]; then
echo "::error::Unable to locate a previous commit"
exit 1
fi
fi
else
PREVIOUS_SHA=$INPUT_BASE_SHA
TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1) && exit_status=$? || exit_status=$?
CURRENT_BRANCH=$TARGET_BRANCH
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: $PREVIOUS_SHA"
echo "::error::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
exit 1
fi
else
echo "Running on a pull request event..."
TARGET_BRANCH=$GITHUB_BASE_REF
CURRENT_BRANCH=$GITHUB_HEAD_REF
git fetch --no-tags -u --progress origin --depth="$INPUT_TARGET_BRANCH_FETCH_DEPTH" "${TARGET_BRANCH}":"${TARGET_BRANCH}" &&
exit_status=$? || exit_status=$?
if [[ -z $INPUT_BASE_SHA ]]; then
PREVIOUS_SHA=$GITHUB_EVENT_PULL_REQUEST_BASE_SHA && exit_status=$? || exit_status=$?
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: $PREVIOUS_SHA"
echo "::error::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
exit 1
fi
fi
if [[ -n "$PREVIOUS_SHA" && -n "$CURRENT_SHA" && "$PREVIOUS_SHA" == "$CURRENT_SHA" && "$INITIAL_COMMIT" == "false" ]]; then
echo "::error::Similar commit hashes detected: previous sha: $PREVIOUS_SHA is equivalent to the current sha: $CURRENT_SHA"
echo "::error::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
exit 1
fi
if [[ -z "$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 <<EOF >> "$GITHUB_OUTPUT"
target_branch=$TARGET_BRANCH
current_branch=$CURRENT_BRANCH
previous_sha=$PREVIOUS_SHA
current_sha=$CURRENT_SHA
EOF
fi
echo "::endgroup::"