pre-commit

#!/bin/bash

# Ensures that the license blurb is added to all source code.

findup() {
	if [[ -f "$1/$2" ]]; then
		echo "$1"
	else
		findUp "$1/.." "$2"
	fi
}

ROOT=$(realpath "$(findup "." "setup.py")")
LICENSE_EXEC="$ROOT/node_modules/.bin/uber-licence"

ensure_license() {
	cwd="$(pwd)"
	# This is ugly but it basically executes the uber-license tool, parses the
	# output to figure out which files were changed, and stages them into the
	# commit.
	("$LICENSE_EXEC" --file '*.py' || exit 1) \
		| grep '^fixed file ' |  perl -F"'" -ane 'print "$F[1]\n"' \
		| while read fileName; do
			echo "License added to $cwd/$fileName"
			git add "$fileName"
		  done
}

unset GIT_DIR

# Ensure uber-licence is installed.
if [[ ! -x "$LICENSE_EXEC" ]]; then
	echo "uber-licence is not installed. Installing."
	pushd "$ROOT" &>/dev/null
	npm i uber-licence
	popd &>/dev/null
fi

for d in tchannel tests benchmarks examples; do
	pushd "$ROOT/$d" &>/dev/null
	ensure_license
	popd &>/dev/null
done