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#!/usr/bin/env bash

# Lightweight CLI wrapper for cncfdm.py that picks a Python 2/PyPy interpreter

# and points the engine at this repo's src/ directory by default.

# Usage: git log ... | ./gitdm [cncfdm options]

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

BASE_DIR="$SCRIPT_DIR/src"

ENGINE="$SCRIPT_DIR/src/cncfdm.py"

# Allow override

PY_BIN=${GITDM_PY:-}

pick_python() {

if [[ -n "${PY_BIN}" ]]; then

echo "$PY_BIN"

return

fi

# Prefer explicit Python 2 binaries, then PyPy, then fall back to python if it is v2

for cand in python2 pypy pypy2; do

if command -v "$cand" >/dev/null 2>&1; then

echo "$cand"; return

fi

done

if command -v python >/dev/null 2>&1; then

if python - <<'PY'

import sys

sys.exit(0 if sys.version_info[0] == 2 else 1)

PY

then

echo python; return

fi

fi

echo "" # not found

}

PY_CMD=$(pick_python || true)

if [[ -z "$PY_CMD" ]]; then

echo "error: gitdm requires Python 2 or PyPy. Install python2/pypy or set GITDM_PY to a suitable interpreter." >&2

exit 1

fi

exec "$PY_CMD" "$ENGINE" -b "$BASE_DIR/" "$@"