#!/bin/sh

# An example hook script to verify what is about to be pushed.  Called by "git
# push" after it has checked the remote status, but before anything has been
# pushed.  If this script exits with a non-zero status nothing will be pushed.
#
# This hook is called with the following parameters:
#
# $1 -- Name of the remote to which the push is being done
# $2 -- URL to which the push is being done
#
# If pushing without using a named remote those arguments will be equal.
#
# Information about the commits which are being pushed is supplied as lines to
# the standard input in the form:
#
#   <local ref> <local sha1> <remote ref> <remote sha1>
#
# This sample shows how to prevent push of commits where the log message starts
# with "WIP" (work in progress).

remote="$1"
url="$2"

z40=0000000000000000000000000000000000000000
composer=${composer-'composer'}

while read local_ref local_sha remote_ref remote_sha
do
    if [ "$local_sha" = $z40 ]
    then
        # Handle delete
        :
    else
        if [ "$remote_sha" = $z40 ]
        then
            # New branch, examine all commits
            range="$local_sha"
        else
            # Update to existing branch, examine new commits
            range="$remote_sha..$local_sha"
        fi

        # Run coding standards check over modified files.
        modified_files=$(git diff --diff-filter=d --name-only "$range" | grep -v '\.\(jpg\|jpeg\|png\|gif\|bmp\|svg\|webp\)$')
        if [ -n "$modified_files" ]
        then
            $composer phpcs $modified_files
            if [ $? -ne 0 ]
            then
                echo >&2 "A coding standards regression was introduced, please fix it before pushing."
                exit 1
            fi
        fi
    fi
done

exit 0