Build ctags/cscope automatically

xref

#!/bin/bash

set -o noglob

function addfiles {
	NAME="$1"
	find $EXCLUDE -name "$NAME" >> cscope.files
}

function autoignore {
	NAME="$1"
	if ! [ -e .xrefignore ] || ! grep -q "$NAME" .xrefignore; then
		if [ -d "$NAME" ]; then
			echo "$NAME/**" >> .xrefignore
		fi
		else if [ -e "$NAME" ]; then
			echo "$NAME" >> .xrefignore
		fi
	fi
}

# auto ignore certain things
#autoignore './node_modules'

# build exclude params
if [ -e .xrefignore ]; then
	EXCLUDE=""
	for path in $(cat .xrefignore); do
		EXCLUDE="$EXCLUDE -not -path $path"
	done
fi

NAMES=""
for name in "*.py" "*.cpp" "*.c" "*.h" "*.js" "*.java" "*.html" "*.proto" "*.php" "*.sh"; do
	if [ -z "$NAMES" ]; then
		NAMES="-name $name"
	else
		NAMES="$NAMES -o -name $name"
	fi
done
NAMES="( $NAMES )"

find $EXCLUDE $NAMES > cscope.files
sort cscope.files > cscope.files_sorted
mv cscope.files_sorted cscope.files

# configure ctags to handle javascript
cat << EOF > .ctags
--langdef=js
--langmap=js:.js
--regex-js=/([A-Za-z0-9._$]+)[ \t]*[:=][ \t]*\{/\1/,object/
--regex-js=/([A-Za-z0-9._$()]+)[ \t]*[:=][ \t]*function[ \t]*\(/\1/,function/
--regex-js=/function[ \t]+([A-Za-z0-9._$]+)[ \t]*\(([^)])\)/\1/,function/
--regex-js=/([A-Za-z0-9._$]+)[ \t]*[:=][ \t]*\[/\1/,array/
--regex-js=/([^= ]+)[ \t]*=[ \t]*[^"]'[^']*/\1/,string/
--regex-js=/([^= ]+)[ \t]*=[ \t]*[^']"[^"]*/\1/,string/

--langdef=protobuf
--langmap=protobuf:.proto
--regex-protobuf=/message ([A-Za-z0-9._$]+)[ \t]*\{/\1/,object/

--PHP-kinds=+cf
-h .php
--regex-PHP=/abstract class ([^ ]*)/\1/c/
--regex-PHP=/interface ([^ ]*)/\1/c/
--regex-PHP=/(public |static |abstract |protected |private )+function ([^ (]*)/\2/f/
EOF

# tell git to ignore this stuff
if [ -e .git/info/exclude ]; then
	if ! grep -q .xrefignore .git/info/exclude; then
		echo ".xrefignore" >> .git/info/exclude
	fi
	if ! grep -q .ctags .git/info/exclude; then
		echo ".ctags" >> .git/info/exclude
	fi
	if ! grep -q tags .git/info/exclude; then
		echo "tags" >> .git/info/exclude
	fi
	if ! grep -q cscope.out .git/info/exclude; then
		echo "cscope.out" >> .git/info/exclude
	fi
	if ! grep -q cscope.files .git/info/exclude; then
		echo "cscope.files" >> .git/info/exclude
	fi
fi

rm -f tags
xargs ctags -f tags --append < cscope.files
cscope -i cscope.files -f cscope.out -b