code.delx.au - monosys/blob - bin/git-cleanup

   1 #!/bin/bash
   2
   3 set -eu
   4
   5 function usage {
   6     echo "Usage: $0 [--remote origin] [--age ndays]"
   7     echo
   8     echo "This tool will not change your repository, the output is a list of git push commands you can use to delete old branches."
   9     echo
  10     echo "Note that the arguments must be passed in the order listed above."
  11     exit 1
  12 }
  13
  14 if [ "${1:-}" = "--help" ]; then
  15     usage
  16 fi
  17
  18 remote="origin"
  19 if [ "${1:-}" = "--remote" ]; then
  20     remote="$2"
  21     shift
  22     shift
  23 fi
  24
  25 age_days=30
  26 if [ "${1:-}" = "--age" ]; then
  27     age_days="$2"
  28     shift
  29     shift
  30 fi
  31 age_seconds=$((age_days*24*3600))
  32
  33 if [ -n "${1:-}" ]; then
  34     usage
  35 fi
  36
  37
  38 echo "## Fetching latest changes from $remote"
  39 git fetch -p "${remote}"
  40
  41
  42 echo "## Constructing list of revisions in master and tags"
  43 safe_revs_file="$(mktemp -t gitcleanup.XXXXXX)"
  44 git rev-list origin/master --tags > "$safe_revs_file"
  45
  46
  47 echo "## Checking for branches to delete"
  48 now="$(date +%s)"
  49 git ls-remote --heads "$remote" | while read line; do
  50     set $line
  51     rev="$1"
  52     branch="$2"
  53     timestamp="$(git rev-list --format=format:'%ct' --max-count=1 "$rev"|tail -n1)"
  54     age=$((now-timestamp))
  55
  56     if [ "$branch" = "refs/heads/master" ]; then
  57         continue;
  58     fi
  59
  60     if grep -q "$rev" "$safe_revs_file"; then
  61         echo git push "$remote" ":$branch" "# remove merged into master or tag"
  62         continue
  63     fi
  64
  65     if [ "$age" -gt "$age_seconds" ]; then
  66         branch_name="${branch##refs/heads/}"
  67         echo git tag "archived/$branch_name" "$rev" "# create tag for older than $age_days days branch"
  68         echo git push "$remote" tag "archived/$branch_name" "# push tag for older than $age_days days branch"
  69         echo git push "$remote" ":$branch" "# remove older than $age_days days"
  70         continue
  71     fi
  72 done
  73
  74 rm -f "$safe_revs_file"
  75