#!/usr/bin/env bash
## This script selects changed files.
##
## Copyright (c) 2012-2014 Sylvain Benner
## Copyright (c) 2014-2018 Sylvain Benner & Contributors
##
## Author: Eugene Yaremenko
## URL: https://github.com/syl20bnr/spacemacs
##
## This file is not part of GNU Emacs.
##
## License: GPLv3

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "${DIR}/shared"

if [[ -z "${CIRCLE_PR_NUMBER// }" ]]; then
    echo "Skipping documentation validation for branch update."
    exit 0
fi

pr_patch_URL="https://patch-diff.githubusercontent.com/raw/"
pr_patch_URL+="${CIRCLE_PROJECT_USERNAME}/"
pr_patch_URL+="${CIRCLE_PROJECT_REPONAME}/pull/"
pr_patch_URL+="${CIRCLE_PR_NUMBER}.patch"

echo "PATCH_URL: \"${pr_patch_URL}\""

curl "${pr_patch_URL}" --output /tmp/patch --silent
first_commit=$(echo $(head -n 1 /tmp/patch) | sed -n 's/From \([a-zA-Z0-9]\+\).*/\1/p')

if [[ -z "${first_commit// }" ]]; then
    echo "Can't find first commit"
    exit 1
else
    echo "First commit: ${first_commit}"
fi

git diff --name-only "${first_commit}^" HEAD > /tmp/changed_files
if [ $? -ne 0 ]; then
    echo "Git diff failed"
    exit 1
fi

echo_headline "CHANGED FILES:"
cat /tmp/changed_files