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ACTIN-3460: Add script to clean git branches #140

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Merged
matt-froggatt merged 3 commits into from
Apr 10, 2026
Merged

ACTIN-3460: Add script to clean git branches #140

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Add script to clean git branches
matt-froggatt Apr 9, 2026
9fe39b9
Kill on command failure
matt-froggatt Apr 10, 2026
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matt-froggatt Apr 10, 2026
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22 changes: 22 additions & 0 deletions actin/local/util/git-clean-stale-branches
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#!/usr/bin/env bash

set -euo pipefail

git fetch --prune
mapfile -t MERGED_DELETED_BRANCHES < <(git branch -vv | grep ': gone]' | awk '{print $1}')
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@nedleitch nedleitch Apr 10, 2026

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Nit here, I don't think you need the <(...) construct, which presents a file descriptor for the given command output, because mapfile is meant to take stdin. In fact I thought you had to specify -u for that?

While this may (or may not...) work, I'd expect to see either:

git branch -vv | grep ': gone]' | awk '{print $1}' | mapfile -t MERGED_DELETED_BRANCHES

or

mapfile -t MERGED_DELETED_BRANCHES < $(git branch ...)

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@matt-froggatt matt-froggatt Apr 10, 2026

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Seems I can't use mapfile -t MERGED_DELETED_BRANCHES < $(git branch ...) since < to redirect to stdin expects a file descriptor, and I can't use git branch -vv | grep ': gone]' | awk '{print $1}' | mapfile -t MERGED_DELETED_BRANCHES because it scopes the MERGED_DELETED_BRANCHES variable to the pipeline. I could do mapfile -t MERGED_DELETED_BRANCHES <<< $(git branch ...) but it doesn't feel much better than what's there already.

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@nedleitch nedleitch Apr 10, 2026

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Fair enough. Maybe the GNU version behaves differently. Still fine to merge :)


if [ ${#MERGED_DELETED_BRANCHES[@]} -eq 0 ]; then
echo "No merged or deleted branches."
exit 0
fi

echo "Merged or deleted branches (${#MERGED_DELETED_BRANCHES[@]}):"
printf ' - %s\n' "${MERGED_DELETED_BRANCHES[@]}"

read -r -p "Delete these? [y/N] " reply
echo ""
if [[ "$reply" =~ ^[Yy]$ ]]; then
git branch -D "${MERGED_DELETED_BRANCHES[@]}"
else
echo "Skipped."
fi