Cacher is the code snippet organizer for pro developers

#!/bin/bash 

TEMP_DIR=`mktemp -d`

# Show counter if number of files is greater than this
COUNTER_VISIBLE=1

COMPANY=""
SCRIPT=`basename $0`
EXCLUDE_FILE="" # Name of exclude list file
TOOL=1 # Default "cloc"
FILTER="\.[ch]p{0,2}$" # Default file filter

function help {
	echo
	echo "Usage: $SCRIPT [options]"

	echo "  Options:"
	echo "    --all 		Analyze ALL files, no filtering is done."
	echo "    --exlude-list= 	File containing exclude list (see comment below)."
	echo "    -c, --company= 	Company name as shown in email address (REQUIRED)."
	echo "    -f, --file-filter= 	File filter. Default \.[ch]p{0,2}$ which includes C and C++ files."
	echo "    -t. --tool 		LOC count tool to use. 1 = cloc (default), 2 = sloccount."
	echo "    -h, --help 		This help text."
	echo 
	echo " 	Exclude list can be used to exclude files or directories from
	the analysis. Simply list them relative to the root of the repository
	directory."
	echo
	echo " 	Script requires a relatively new version of Git that supports --show-email."
	echo
}

while test $# -gt 0; do
	case "$1" in
		-h)
			help
			exit 1
			;;
		--help)
			help
			exit 1
			;;
		--all)
			FILTER=""
			shift
			;;
		-f)
			shift
			if test $# -gt 0; then
				FILTER=$1
			fi
			shift
			;;
		--file-filter*)
			FILTER=`echo $1|sed -e 's/^[^=]*=/g'`	
			;;
		-c)
			shift
			if test $# -gt 0; then
				COMPANY=$1
			fi
			shift
			;;
		--company*)
			COMPANY=`echo $1|sed -e 's/^[^=]*=//g'`
			shift
			;;
		--exclude-list*)
			if [ $# -gt 0 ]; then
				EXCLUDE_FILE=`echo $1|sed -e 's/^[^=]*=//g'`
			else
				echo "Exclude file missing!"
				exit 1
			fi
			shift
			;;
		-t)
			shift
			if test $# -gt 0; then
				TOOL=$1
			fi
			shift
			;;
		*)
			break;
			;;
	esac
done


if [ "$COMPANY" == "" ]; then
	echo "Company name missing, exiting."
	echo "Try $SCRIPT -h"
	exit 1
fi

echo "Copying directory structure to $TEMP_DIR."

cp -r * $TEMP_DIR
find $TEMP_DIR -type f -exec rm "{}" \;

# Get list of authors from company (emails only)
echo "Creating list of authors into authors.txt..."
git log --oneline --format="%ae" |grep $COMPANY |sort |uniq > authors.txt

# Create blame file of all source code
echo "Creating list of files..."
git ls-files --full-name > $TEMP_DIR/file-list.txt
TOTAL_FILES=`wc -l < $TEMP_DIR/file-list.txt`

if [ "$FILTER" != "" ]; then
	# Only include code files (c, h, cpp, hpp)
	egrep -e $FILTER < $TEMP_DIR/file-list.txt > $TEMP_DIR/file-list.tmp
	mv $TEMP_DIR/file-list.tmp $TEMP_DIR/file-list.txt
fi

INCLUDED_FILES=`wc -l < $TEMP_DIR/file-list.txt`
echo "Total number of files: $TOTAL_FILES"
echo "Total number of files to analyze: $INCLUDED_FILES"

echo
echo "Removing files with no edits by $COMPANY..."
counter=1
while read file
do
	if [ $INCLUDED_FILES -gt $COUNTER_VISIBLE  ]; then
		echo -en "\r$counter / $INCLUDED_FILES ($file)                                                    "
	fi
	# Only include files that have edits by company 
	BY_COMPANY=`git log --oneline --format="%ae" "$file" |grep -i $COMPANY`
	if [ "$BY_COMPANY" != "" ]; then
		echo $file >> $TEMP_DIR/file-list.tmp
	fi
	counter=`expr $counter + 1`
done < $TEMP_DIR/file-list.txt

echo

if [ -e $TEMP_DIR/file-list.tmp ]; then
	mv $TEMP_DIR/file-list.tmp $TEMP_DIR/file-list.txt
fi

# Remove temp files
CURR_DIR=`pwd`

if [ "$EXCLUDE_FILE" != "" ]; then
	echo "Handling exclude list..."
	grep -vFf $EXCLUDE_FILE $TEMP_DIR/file-list.txt > $TEMP_DIR/file-filtered.txt
	mv $TEMP_DIR/file-filtered.txt $TEMP_DIR/file-list.txt
fi

COMPANY_FILES=`wc -l < $TEMP_DIR/file-list.txt`

echo "Files removed: `expr $INCLUDED_FILES - $COMPANY_FILES`"
echo

# For each file, find lines of code added or edited by company employee and
# only copy those lines to the temporary directory.
echo "Removing code not written by $COMPANY.."
counter=1
while read file
do
	if [ $COMPANY_FILES -gt $COUNTER_VISIBLE  ]; then
		echo -en "\r$counter / $COMPANY_FILES ($file)                                                    "
	fi
	git blame -w --show-email "$file" > "$TEMP_DIR/$file.back"
	grep -Ff authors.txt "$TEMP_DIR/$file.back" > "$TEMP_DIR/$file.back2"
	# Remove git blame stuff
	sed 's/\w*\s(<.*>\s*\w*-\w*-\w*\s\w*:\w*\w*:\w*\s+\w*\s*\w*)//' < "$TEMP_DIR/$file.back2" > "$TEMP_DIR/$file"
	counter=`expr $counter + 1`
done < $TEMP_DIR/file-list.txt

echo 
echo

if [ "$EXCLUDE_FILE" != "" ]; then
	cp $EXCLUDE_FILE $TEMP_DIR
fi

cd $TEMP_DIR
find $TEMP_DIR -name "*.back*" -exec rm "{}" \;

echo "Running analysis"
echo "----------------"

# Count lines & print results
if [ $TOOL -eq 2 ]; then
	if [ "$EXCLUDE_FILE" != "" ]; then
		echo "Handling exclude list..."
		while read file 
		do
			if [ -d "$file" ]; then
				echo "Removing dir $file"
				rm -rf $file
			else
				echo "Removing $file"
				rm $file
			fi
		done < $EXCLUDE_FILE
	fi


	sloccount .
else
	cloc --list-file $TEMP_DIR/file-list.txt
fi

cd $CURR_DIR