update

#!/bin/bash
#
# This is an example for a Git Checkstyle "update" hook
#
# Author: Adrian Mörchen
#
# Inspired by (Thank you all!):
#   * Our old SVN Checkstyle Hook for Communote (http://www.communote.com)
# 	* https://gist.github.com/davetron5000/37350
#   * https://gist.github.com/caniszczyk/1327469
#   * http://bluec0re.blogspot.de/2012/05/git-pre-receive-hook-with-checkstyle.html
#   * http://ncona.com/2013/01/git-hook-to-run-code-static-analysis/
#   * and a lot of others and Google and SE search
#

source hooks/checkstyle.cfg

echo " "
echo "Checking your style (Version: 06/26/2013). Please wait..."
echo " "

refname=$1 
oldrev=$(git rev-parse $2)
newrev=$(git rev-parse $3)
exit_status=0
    
mkdir -p $TEMP_BASE_PATH/$newrev
mkdir -p $TEMP_BASE_PATH/results

git diff-tree --no-commit-id -r $oldrev $newrev > $TEMP_BASE_PATH/$newrev/git_diff-tree
          
while read -r line; do
    # Example of line: :000000 100644 0000000000000000000000000000000000000000 af7077beb4e7ef5323e231c3c585a41938a73767 A test.txt
    line=$(echo $line | tr ":" " ")
    commit_parameters=($line)
    if [ "${commit_parameters[4]}" != "D" ]; then
		if [ "${commit_parameters[5]: -5}" == ".java" ]; then
			# echo "Found file ${commit_parameters[5]} in revision ${commit_parameters[3]}"
			temp_file=$TEMP_BASE_PATH/$newrev/${commit_parameters[3]}/${commit_parameters[5]}
			mkdir -p $(dirname $temp_file)
			git show $newrev:${commit_parameters[5]} > $temp_file
			mkdir -p $(dirname $TEMP_BASE_PATH/results/${commit_parameters[5]}_new.log)
			$CHECKSTYLE_COMMAND $temp_file | grep -v "Starting audit" | grep -v "Audit done" > $TEMP_BASE_PATH/results/${commit_parameters[5]}_new.log
			if [ -f $TEMP_BASE_PATH/results/${commit_parameters[5]}_old.log ]; then
				checkstyle_old_count=$(wc -l < $TEMP_BASE_PATH/results/${commit_parameters[5]}_old.log)
			else
				checkstyle_old_count=$NO_OLD_FILE_ALLOWED_ERRORS
			fi 		  
			checkstyle_new_count=$(wc -l < $TEMP_BASE_PATH/results/${commit_parameters[5]}_new.log)
			if [ $checkstyle_new_count -gt $checkstyle_old_count ]; then
			    exit_status=1
			    echo " "
				echo "${commit_parameters[5]}: There was/where $checkstyle_new_count checkstyle error(s) (old $checkstyle_old_count), please review and fix them:"
				echo " "
				sed 's|'$TEMP_BASE_PATH/$newrev'||g' < $TEMP_BASE_PATH/results/${commit_parameters[5]}_new.log
				echo " "
			else
				if [ -f $TEMP_BASE_PATH/results/${commit_parameters[5]}_old.log ]; then
					rm $TEMP_BASE_PATH/results/${commit_parameters[5]}_old.log
				fi
				mv $TEMP_BASE_PATH/results/${commit_parameters[5]}_new.log $TEMP_BASE_PATH/results/${commit_parameters[5]}_old.log
			fi
		fi
    fi
done < $TEMP_BASE_PATH/$newrev/git_diff-tree

rm -r $TEMP_BASE_PATH/$newrev

echo " "
echo "Done. Thanks for your patience."
echo " "
exit $exit_status