List remote Git branches and the last commit date for each branch. Sort by most recent commit date.

git-branches-by-commit-date.sh

# Credit http://stackoverflow.com/a/2514279
for branch in `git branch -r | grep -v HEAD`;do echo -e `git show --format="%ci %cr" $branch | head -n 1` \\t$branch; done | sort -r

output.txt

# Example output (resulting from running command on the Rails repo — https://github.com/rails/rails)

2012-02-12 03:20:24 -0800 9 hours ago 	origin/master
2012-02-10 10:34:35 -0800 2 days ago 	origin/3-2-stable
2012-01-31 09:56:12 -0800 12 days ago 	origin/3-1-stable
2012-01-24 11:18:06 -0800 3 weeks ago 	origin/3-0-stable
2011-12-31 05:09:14 -0800 6 weeks ago 	origin/2-3-stable
2011-11-25 09:49:54 +0000 3 months ago 	origin/serializers
2011-06-16 12:08:26 -0700 8 months ago 	origin/compressor
2011-05-24 16:03:41 -0700 9 months ago 	origin/sass-cleanup
2011-01-17 14:14:24 +1300 1 year, 1 month ago 	origin/2-1-stable
2011-01-17 14:13:56 +1300 1 year, 1 month ago 	origin/2-2-stable
2010-08-17 17:11:17 -0700 1 year, 6 months ago 	origin/deps_refactor
2010-05-16 22:23:44 +0200 1 year, 9 months ago 	origin/encoding
2009-09-10 17:41:18 -0700 2 years, 5 months ago 	origin/2-0-stable
2008-02-19 02:09:55 +0000 4 years ago 	origin/1-2-stable

Another way to do this via gitconfig aliases:

rsanheim/dotfiles#34

You can use the command below if you want to filter the branches that were updated X - days ago.

git branch -r --format="%(committerdate:iso8601), %(committerdate:relative) - %(refname:short)" | grep -v [H]EAD | awk -v dateA="$(date -d "$(date +%Y-%m-%d) - 3 days" +%Y-%m-%d)" -F '|' 'dateA<=$1" "$2' | awk -F '/' '{ print $NF }'

From the above command replace the 3 days with your X no of days

Here's my version of this.

# Credit https://gist.github.com/jasonrudolph/1810768
# Credit http://stackoverflow.com/a/2514279
for branch in `git branch -r | grep -v HEAD`;
	do printf "%-40s\\t%20s\\n" $branch "`git show --format="%ci %cr" $branch | head -n 1`"; 
done | sort -k 2

Here's a version sorting by committer date, including colour formatting, that is easy to add as a git alias:

❯ git branch -a --sort=-creatordate --format='%(color:red)%(committerdate:iso8601)%(color:reset) %(align:8)(%(ahead-behind:HEAD))%(end) %(color:blue)%(align:40)%(refname:short)%(end)%(color:reset) %(color:white)%(contents:subject) %(color:yellow)(%(committerdate:relative))%(color:reset)'

Example output:

Git aliases:

[alias]
        br = "branch --format='%(color:red)%(committerdate:iso8601)%(color:reset) %(align:8)(%(ahead-behind:HEAD))%(end) %(color:blue)%(align:40)%(refname:short)%(end)%(color:reset) %(color:white)%(contents:subject) %(color:yellow)(%(committerdate:relative))%(color:reset)' --sort=-creatordate"
        newestb = "br --sort=-committerdate"
        oldestb = "br --sort=committerdate"

It can then be composed with other flags like -r, -a, --merged=main, etc.

@bjeanes this looks really nice but I get this error:

fatal: unknown field name: ahead-behind:HEAD

That’s interesting. What git version? I can’t think of a reason that HEAD wouldn’t be defined, but you could change it to ‘main’ or some other ref

Great thread, thank you!

@bjeanes was on 2.39.0, upgrading to the latest version of git solved the issue. Thank you!