script to recursively git grep multiple repos in subdirectories

m-git-grep.sh

#!/usr/bin/env sh
#
# Git grep on multiple repos in descendant directories from cwd

set -euo pipefail
IFS=$'\n\t'

# how many directories to recurse - helps with performance to keep it low
# but may miss subdirectories if too low
# it can be overriden  by setting this variable in the calling shell
MAXDEPTH=${MAXDEPTH:-3}

find . -maxdepth "$MAXDEPTH" -type d -name .git -print0 | \
    xargs -0 -I@@ sh -c \
        'cd "@@/.." ; GIT_PAGER="" git grep --color "$@" | sed -e "s#^#${PWD}/#"' \
         -- "$@"