---
title: Git tricks
layout: default
---

## Refs

    HEAD^       # 1 commit before head
    HEAD^^      # 2 commits before head
    HEAD~5      # 5 commits before head

## Branches

    # create a new branch
      git checkout -b $branchname
      git push origin $branchname --set-upstream

    # get a remote branch
      git fetch origin
      git checkout --track origin/$branchname

    # delete local remote-tracking branches (lol)
      git remote prune origin

    # list merged branches
      git branch -a --merged

    # delete remote branch
      git push origin :$branchname

Submodules
----------

    # Import .gitmodules
      git submodule init

    # Clone missing submodules, and checkout commits
      git submodule update --init --recursive

    # Update remote URLs in .gitmodules
    # (Use when you changed remotes in submodules)
      git submodule sync

Diff
----

### Diff with stats

    git diff --stat
    app/a.txt    | 2 +-
    app/b.txt    | 8 ++----
    2 files changed, 10 insertions(+), 84 deletions(-)

### Just filenames

    git diff --summary

Log options
-----------

    --oneline
      e11e9f9 Commit message here

    --decorate
      shows "(origin/master)"

    --graph
      shows graph lines

    --date=relative
      "2 hours ago"

Misc
----

### Cherry pick

    git rebase 76acada^

## Misc

    # get current sha1 (?)
      git show-ref HEAD -s

    # show single commit info
      git log -1 f5a960b5

## Short log

     $ git shortlog
     $ git shortlog HEAD~20..    # last 20 commits

     James Dean (1):
         Commit here
         Commit there

     Frank Sinatra (5):
         Another commit
         This other commit

## Bisect

    git bisect start HEAD HEAD~6
    git bisect run npm test
    git checkout refs/bisect/bad   # this is where it screwed up
    git bisect reset

### Manual bisection

    git bisect start
    git bisect good   # current version is good

    git checkout HEAD~8
    npm test          # see if it's good
    git bisect bad    # current version is bad

    git bisect reset  # abort

## Searching

    git log --grep="fixes things"  # search in commit messages
    git log -S"window.alert"       # search in code
    git log -G"foo.*"              # search in code (regex)