git grep by file extensions

Question

I know that, if I wanted to grep for a pattern only on files with certain extensions, I could do this:

// searches recursively and matches case insensitively in only javascript files // for "res" from the current directory grep -iIr --include=*.js res ./ 

I've been trying to search for a way to do this via git grep as well (to take advantage of git grep's speed from the indexes it stores with its tree), but to no avail. I saw here that excluding certain file types is not possible.

Answer 1

Yes, for example:

git grep res -- '*.js' 

Answer 2

Try doing this :

find . -type f -iname '*.js' -exec grep -i 'pattern' {} +