I wanted to figure out where I used a library in existing code.
This is what I wound up doing in zsh:
brennen@exuberance 11:48:07 /home/brennen/code $ for foo in `ls -f`; do; if [[ -d $foo/.git ]]; then cd $foo; echo '--' $foo '--'; git grep 'IPC::System::Simple'; cd ~/code; fi; done
-- thcipriani-dotfiles --
-- sfe-sysadmin --
-- pi_bootstrap --
-- bpb-kit --
-- batchpcb --
-- according-to-pete --
-- meatbags --
-- sfe-paleo --
-- instruct --
-- sfe-openstack --
-- YouTube_Captions --
-- batchpcb_rails --
-- userland-book --
slides/render.pl:use IPC::System::Simple qw(capturex);
-- sfe-custom-queries --
-- brennen-sparklib-fork --
-- tilde.club --
-- display --
-- sfe-chef --
-- xrectsel --
-- git-feed --
git-feed:use IPC::System::Simple qw(capturex);
sample_feed.xml: use IPC::System::Simple qw(capturex);
sample_feed.xml:+use IPC::System::Simple qw(capturex);
-- reddit --
-- rtd-tools --
-- sparkfun --
-- mru --
Lame-ish, but I'm perpetually forgetting shell loop and conditional syntax, so it seems worth making a note of.