entrypoint.sh

#!/usr/bin/env bash

set -euo pipefail

INPUT_SEPARATOR="${INPUT_SEPARATOR//\%/%25}"
INPUT_SEPARATOR="${INPUT_SEPARATOR//\./%2E}"
INPUT_SEPARATOR="${INPUT_SEPARATOR//\\n/%0A}"
INPUT_SEPARATOR="${INPUT_SEPARATOR//\\r/%0D}"

echo "::group::verify-changed-files"
echo "::debug::Separator: $INPUT_SEPARATOR"

git config --global core.quotepath "$INPUT_QUOTEPATH"

OS=$(uname -s)

if [[ -n $INPUT_PATH ]]; then
  if [[ "$OS" == "NT"* ]] || [[ "$OS" == "MINGW"* ]] || [[ "$OS" == *"MSYS"* ]]; then
    REPO_DIR="$GITHUB_WORKSPACE\\$INPUT_PATH"
  else
    REPO_DIR="$GITHUB_WORKSPACE/$INPUT_PATH"
  fi

  echo "Resolving repository path: $REPO_DIR"
  if [[ ! -d "$REPO_DIR" ]]; then
    echo "::error::Invalid repository path: $REPO_DIR"
    echo "::endgroup::"
    exit 1
  fi
  cd "$REPO_DIR"
fi

GIT_STATUS_EXTRA_ARGS="-u --porcelain"

if [[ "$INPUT_MATCH_GITIGNORE_FILES" == "true" ]]; then
  GIT_STATUS_EXTRA_ARGS+=" --ignored"
fi

if [[ -n "$INPUT_FILES_PATTERN_FILE" ]]; then
  TRACKED_FILES=$(git diff --diff-filter=ACMUXTR --name-only | { grep -x -E -f "$INPUT_FILES_PATTERN_FILE" || true; } | perl -pe 's/([$\(\)`|&;])/\\$1/g' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')

  # Find untracked changes
  # shellcheck disable=SC2086
  UNTRACKED_OR_IGNORED_FILES=$(git status $GIT_STATUS_EXTRA_ARGS | awk '/\?\?|!!/ {print $2}' | { grep -x -E -f "$INPUT_FILES_PATTERN_FILE" || true; } | perl -pe 's/([$\(\)`|&;])/\\$1/g' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')

  # Find unstaged deleted files
  UNSTAGED_DELETED_FILES=$(git ls-files --deleted | { grep -x -E -f "$INPUT_FILES_PATTERN_FILE" || true; } | perl -pe 's/([$\(\)`|&;])/\\$1/g' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
else
  TRACKED_FILES=$(git diff --diff-filter=ACMUXTR --name-only | perl -pe 's/([$\(\)`|&;])/\\$1/g' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')

  # Find untracked changes
  # shellcheck disable=SC2086
  UNTRACKED_OR_IGNORED_FILES=$(git status $GIT_STATUS_EXTRA_ARGS | awk '/\?\?|!!/ {print $2}' | perl -pe 's/([$\(\)`|&;])/\\$1/g' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')

  # Find unstaged deleted files
  UNSTAGED_DELETED_FILES=$(git ls-files --deleted | perl -pe 's/([$\(\)`|&;])/\\$1/g' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
fi

echo "::debug::Tracked changed files: $TRACKED_FILES"
echo "::debug::Untracked/Ignored changed files: $UNTRACKED_OR_IGNORED_FILES"
echo "::debug::Unstaged changed files: $UNSTAGED_DELETED_FILES"

# Function to concatenate unique filenames with a specified separator
function concatenate_unique_filenames() {
  local separator=$1
  shift
  local filenames=""
  
  for files in "$@"; do
    if [[ -n $files ]]; then
      if [[ -n $filenames ]]; then
        filenames+="$separator$files"
      else
        filenames="$files"
      fi
    fi
  done

  filenames=$(echo "$filenames" | tr "$separator" '\n' | sort -u | tr '\n' "$separator")
  filenames=${filenames%"$separator"}  # Remove trailing separator

  echo "$filenames"
}

# Concatenate non-empty strings with a '|' separator and Remove duplicate entries
CHANGED_FILES=$(concatenate_unique_filenames "|" "$TRACKED_FILES" "$UNTRACKED_OR_IGNORED_FILES" "$UNSTAGED_DELETED_FILES")

if [[ -n "$CHANGED_FILES" ]]; then
  echo "::debug::Changed files: $CHANGED_FILES"
  echo "Found uncommitted changes"

  CHANGED_FILES=$(echo "$CHANGED_FILES" | awk '{gsub(/\|/,"\n"); print $0;}' | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')

  echo "files_changed=true" >> "$GITHUB_OUTPUT"
  echo "changed_files=$CHANGED_FILES" >> "$GITHUB_OUTPUT"

  if [[ "$INPUT_FAIL_IF_CHANGED" == "true" ]]; then
    if [[ -n "$INPUT_FAIL_MSG" ]]; then
      echo "::error::$INPUT_FAIL_MSG"
    fi
    exit 1
  fi
else
  echo "No changes found."
  echo "files_changed=false" >> "$GITHUB_OUTPUT"
  
  if [[ "$INPUT_FAIL_IF_UNCHANGED" == "true" ]]; then
      if [[ -n "$INPUT_FAIL_MSG" ]]; then
        echo "$INPUT_FAIL_MSG"
      fi
      exit 1
  fi
fi

echo "::endgroup::"