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Listing each branch and its last revision's date in Git

I need to delete old and unmaintained branches from our remote repository. I'm trying to find a way with which to list the remote branches by their last modified date, and I can't.

Is there an easy way to list remote branches this way?

Solution

  • commandlinefu has 2 interesting propositions:

    for k in $(git branch | perl -pe s/^..//); do echo -e $(git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1)\\t$k; done | sort -r

    or:

    for k in $(git branch | sed s/^..//); do echo -e $(git log --color=always -1 --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k --)\\t"$k";done | sort

    That is for local branches, in a Unix syntax. Using git branch -r, you can similarly show remote branches:

    for k in $(git branch -r | perl -pe 's/^..(.*?)( ->.*)?$/\1/'); do echo -e $(git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1)\\t$k; done | sort -r

    Michael Forrest mentions in the comments that zsh requires escapes for the sed expression:

    for k in git branch | perl -pe s\/\^\.\.\/\/; do echo -e git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1\\t$k; done | sort -r

    kontinuity adds in the comments:

    If you want to add it your zshrc the following escape is needed.

    alias gbage='for k in $(git branch -r | perl -pe '\''s/^..(.*?)( ->.*)?$/\1/'\''); do echo -e $(git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1)\\t$k; done | sort -r'

    In multiple lines:

    alias gbage='for k in $(git branch -r | \
  perl -pe '\''s/^..(.*?)( ->.*)?$/\1/'\''); \
  do echo -e $(git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | \
     head -n 1)\\t$k; done | sort -r'

    Note: n8tr's answer, based on git for-each-ref refs/heads is cleaner. And faster.
    See also "Name only option for git branch --list?"

    More generally, tripleee reminds us in the comments:

    • Prefer modern $(command substitution) syntax over obsolescent backtick syntax.

    (I illustrated that point in 2014 with "What is the difference between $(command) and `command` in shell programming?")

    • Don't read lines with for.
    • Probably switch to git for-each-ref refs/remote to get remote branch names in machine-readable format