A small script to find stale branches

find-old-branches.sh

#!/bin/bash

# This is a very naive script, it doesn't do grouping and returns all branches
# I only really care about branches that have not seen commits in two months
#
# I am hoping to find some time to write a tool that can output these reports for me
# In the meantime, I am using this

echo "Merged branches"
for branch in `git branch -r --merged | grep -v HEAD`;do echo -e `git log --no-merges -n 1 --format="%ci, %cr, %an, %ae, "  $branch | head -n 1` \\t$branch; done | sort -r

echo ""
echo "Not merged branches"
for branch in `git branch -r --no-merged | grep -v HEAD`;do echo -e `git log --no-merges -n 1 --format="%ci, %cr, %an, %ae, " $branch | head -n 1` \\t$branch; done | sort -r

ok, someone please tell me how to run this script. i mean how this script works , it doesn't require any login or anything

It's a bash script.
You can save it into a folder where you have previously cloned a git repo.
Then run it: if you haven't prevously saved your git credentials, git will prompt for them.

In order to filter with awk keeping just branches that have not seen commits in two months
it would suffice prepending %ct (committer date, UNIX timestamp) to the git log fields
then filter and strip the added prefix

Since I want to produce a CSV I did it as follows (for unmerged branches)

for branch in `git branch -r --no-merged | grep -v HEAD`;do
  echo -e $(git log --no-merges -n 1 \
    --format="%ct,%cI,%an,%ae," $branch |                    `# prepend secs since EPOCH as 1st field` \
    head -n 1)$branch; \
done | \
  sort -r | \
  awk -F , '$1 < limit' limit=$(date -d "2 month ago" +%s) | `# split by comma and filter based on 1st field` \
  sed 's/^[0-9]*\,//g'                                       `# strip 1st field now`

It can clearly be optimized based on needs, moving sort after filter and so on

PS: please note here I added comments within ` (backticks) for readability, so in turn I had to replace subshell backticks with the $() syntax.
Also note that this approach leverages some additional comands, namely awk, date and sed

@trntsmn - The term 'grep' is not recognized as a name of a cmdlet, function, script file, or executable program.
=D