#!/usr/bin/env bash
## Formatting check script for CircleCI
##
## 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 formatting check 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

changed_f_as_args=()
while read p
do
    if [ -f "$p" ]; then
        if [ ${p: -4} == ".org" ]; then
            changed_f_as_args+=("${p}")
        fi
    fi
done </tmp/changed_files

echo_headline "CHECKING FOR MISPLACED SPACES AND TABS:"
old_head=$(git rev-parse --short HEAD)
git reset -q "${first_commit}^"
git add -N .
git diff --check --color > space_test_result
if [[ -s space_test_result ]]; then
    cat space_test_result
    exit 1
fi
git reset $old_head
echo "Done."

if [ ${#changed_f_as_args[@]} -ne 0 ]; then

    echo_headline "TESTING DOCUMENTATION FORMATTING:"
    emacs -batch -l /opt/spacedoc/emacs_tools/docfmt/run.el -no-site-file \
          -q $(printf "%s " "${changed_f_as_args[@]}")
    if [ $? -ne 0 ]; then
        echo "Documentation formatting script failed"
        exit 2
    fi
    git diff --color HEAD > spacefmt_result
    if [[ -s spacefmt_result ]]; then
        echo_headline "PLEASE APPLY CHANGES BELOW:"
        cat spacefmt_result
        exit 1
    fi

    echo_headline "TESTING DOCUMENTATION WITH SDN EXPORT:"
    emacs -batch -l /opt/spacedoc/emacs_tools/export/run.el -no-site-file \
          -q /root/.emacs.d/ $(printf "%s " "${changed_f_as_args[@]}")
    if [ $? -ne 0 ]; then
        echo "Documentation needs some fixing ;)"
        exit 1
    fi

#    echo_headline "VALIDATING DOCUMENTATION:"
#    sdn validate /opt/spacedoc/emacs_tools/export/target
#    if [ $? -ne 0 ]; then
#        echo "Validation failed."
#        exit 2
#    fi
#    echo "Done."

else
    echo "This commit doesn't change documentation files."
fi

echo "All test passed."