Bash tips: Easier git branch deleting and checking out

    31 Jul 2017
    Liam Griffin-Jowett

    Liam Griffin-Jowett

    See author's bio and posts

    I aspire to be a true lazy programmer.

    Every repetitive action I try to automate. Every task that doesn’t translate to automation I try to shrink, saving as many keystrokes as possible. Such it is with deleting git branches.

    Easier deleting

    If you use pull requests in your daily coding life, you’ll know about having to clean up unneeded branches after finishing your task and merging the PR. I created a function to make this easier:

    function git_branch_delete_like () {
  # get all local branches
  git for-each-ref --format='%(refname:strip=2)' refs/heads/* | \ 
  # filter for the matching pattern 
  grep $1 | \
  # delete all matching branches
  xargs git branch -D 
}

    The delete like also solves the problem of "Damn I can’t remember the name of my branch, but it was something like fix-terrible-bug". Just do git_branch_delete_like bug. Of course, by putting this in your ~/.bashrc you have autocompletion so you don’t need to type the whole function name out, however I still find it a bit to flow-disrupting to do git_b<TAB>, so I aliased it to gbd.

    alias gbd="git_branch_delete_like"

    And my branch deleting laziness is complete.

    $ gbd bug
Deleted branch fix-super-terrible-bug (was 6dd0640).

    Easier checking out

    Following on from this, here’s a way to checkout a branch matching against a pattern, for when you can’t remember the actual name of a branch.

    I’ve also added a little extra functionality to try and checkout a remote branch if there is no matching branch locally.

    function git_checkout_like() {
  MATCHING_LOCAL_BRANCH=$(git for-each-ref --format='%(refname:strip=2)' refs/heads/* | grep $1)
  if [ -n "$MATCHING_LOCAL_BRANCH" ]
  then
    git checkout $MATCHING_LOCAL_BRANCH
  else
    # try and find a matching remote branch
    git for-each-ref --format='%(refname:strip=3)' refs/remotes/** | \
    grep $1 | \
    xargs git checkout
  fi
}

    As before, I’ve aliased this to something short:

    alias gcl=git_checkout_like

    Now I can checkout with ease!

    $ git branch
* master
  my-feature
  my-other-feature
$ gcl other
Switched to branch 'my-other-feature'
$ git branch -r
  origin/HEAD -> origin/master
  origin/master
  origin/coworkers-feature-that-he-wants-you-to-check
$ gcl coworkers
Branch coworkers-feature-that-he-wants-you-to-check set up to track remote branch coworkers-feature-that-he-wants-you-to-check from origin.
Switched to a new branch 'coworkers-feature-that-he-wants-you-to-check'

    Caveats

    If there is more than one branch that matches your pattern you’ll get an error. I did think about just checking out the first available branch that matches the pattern, but as it might not be the branch you were after I decided to leave it out.

    Stay lazy.

    This post was cross-posted to my personal blog.

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