This is a small collection of simple
git tips and tricks I use to
make my life easier.
Quickly amend an existing commit with new files
I have this alias in place that will amend the current commit while automatically re-using the existing commit message:
alias.fix=commit --amend -C HEAD
With this in place, fixing a review becomes:
$ vim some/file/somewhere $ git add -u $ git fix
Which I find much more convenient than
git commit --amend, following
by saving the commit message.
What files have changed?
Sometimes, I just want to know what files were changed in a commit. I
have the following alias, because I have a hard time remembering
whether I want
Which gets me the commit message and a list of changed files:
$ git changed commit 8c2a00809817a047bf312b72f390b5cb50ef9819 Author: Lars Kellogg-Stedman <email@example.com> Date: Wed Feb 17 11:11:02 2016 -0500 yet another attempt at fixing image fetching this uses curl rather than wget, because wget chokes on file:// urls which makes it difficult to cache images locally. curl supports resuming downloads, but explicitly rather than implicitly like wget, so we need a do/until loop. Change-Id: Ibd3c524ea6ddfd423aec439f9eb7fffa62dfe818 :100644 100644 342a002... 2b9f9cb... M playbooks/roles/libvirt/setup/undercloud/tasks/main.yml :100644 000000 d22cb99... 0000000... D playbooks/roles/libvirt/setup/undercloud/templates/get-undercloud.sh.j2
Getting the name of the current branch
For scripting purposes I often want the name of the current branch.
Rather than reading
git rev-parse --help every time, I have this
alias.branch-name=rev-parse --abbrev-ref --symbolic-full-name HEAD
Which gets me:
$ git branch-name master $ git checkout bug/missing-become $ git branch-name bug/missing-become
Prevent accidental commits on master
When working on upstream projects I always want to be working on a
feature branch. To prevent accidental commits on master I drop the
following script into
#!/bin/sh current_branch=$(git branch-name) if [ "$current_branch" = "master" ]; then echo "*** DO NOT COMMIT ON MASTER" exit 1 fi exit 0
If I try to commit to my local
master branch, I get:
$ git ci -m 'made a nifty change' *** DO NOT COMMIT ON MASTER