Quick tip: Grep in Git
This quick tip is about two small features of Git I wish I had known about earlier, as it makes it way easier to search through it.
git-grep
git-grep is a way to search through your tracked files for whatever you provide. For example, if you want all files containing the word "index":
git grep index

You can limit the search to specific files—for example, if you want to filter the above example to just JSON files:
git grep index -- '*.json'

You can also search for multiple items in a single file—for example, if you want to find all files containing both "index" and "model":
git grep --all-match -e index -e model

git-log grep
git log has a grep function too, which is awesome for finding commit messages with a specific word or words. For example, if you want to find all commits about "Speaker" for DevConf, you could run:
git log --all --grep="Speaker"
