#!/bin/sh
# SPDX-FileCopyrightText: 2026 GPForum Contributors
# SPDX-License-Identifier: BSD-3-Clause

set -eu

root=$(CDPATH= cd -- "$(dirname "$0")/.." && pwd)

set -- perltidy

# Route through the project wrapper so the locked tree and the validated
# interpreter are used, instead of whatever happens to be on PATH.
if [ -d "$root/local" ]; then
    set -- "$root/script/gpforum-carton" exec perltidy
fi

tmp_dir="${TMPDIR:-/tmp}/gpforum-perltidy-check.$$"
mkdir -p "$tmp_dir"
trap 'rm -rf "$tmp_dir"' EXIT HUP INT TERM

file_list="$tmp_dir/files"
find bin lib t script \
    -type f \( -path 'bin/*' -o -name '*.pm' -o -name '*.pl' -o -name '*.t' \) \
    -print0 > "$file_list" 2>/dev/null || true

# script/ holds a mix of shell and Perl. Both this gate and script/perlcritic
# select the Perl programs by shebang, so the two agree about which files the
# house style applies to.
for candidate in script/*; do
    [ -f "$candidate" ] || continue
    if head -n 1 "$candidate" | grep -q 'perl'; then
        printf '%s\0' "$candidate" >> "$file_list"
    fi
done

if [ ! -s "$file_list" ]; then
    echo "No Perl files found."
    exit 0
fi

# The same byte comparison belongs to Perl::Tidy's --assert-tidy. Batch
# the inputs so the validated interpreter and formatter start once per
# argument-size batch, rather than once for every file in the repository.
# Output stays in the owned temporary directory; no source is rewritten.
xargs -0 "$@" --assert-tidy --standard-error-output \
    --profile="$root/.perltidyrc" --output-path="$tmp_dir" < "$file_list"