tg-delete.sh

   1 #!/bin/sh
   2 # TopGit - A different patch queue manager
   3 # Copyright (C) 2008 Petr Baudis <pasky@suse.cz>
   4 # Copyright (C) 2017,2018 Kyle J. McKay <mackyle@gmail.com>
   5 # All rights reserved
   6 # License GPLv2
   7
   8 force= # Whether to delete non-empty branch, or branch where only the base is left.
   9 stash= # tgstash refs before changes
  10 name=
  11
  12 if [ "$(git config --get --bool topgit.autostash 2>/dev/null)" != "false" ]; then
  13         # topgit.autostash is true (or unset)
  14         stash=1
  15 fi
  16
  17 ## Parse options
  18
  19 while [ -n "$1" ]; do
  20         arg="$1"; shift
  21         case "$arg" in
  22         -f|--force)
  23                 force=$(( $force +1 ));;
  24         --stash)
  25                 stash=1;;
  26         --no-stash)
  27                 stash=;;
  28         -*)
  29                 echo "Usage: ${tgname:-tg} [...] delete [-f] <name>" >&2
  30                 exit 1;;
  31         *)
  32                 [ -z "$name" ] || die "name already specified ($name)"
  33                 name="$arg";;
  34         esac
  35 done
  36
  37
  38 ## Sanity checks
  39
  40 [ -n "$name" ] || die "no branch name specified"
  41 branchrev="$(git rev-parse --verify "refs/heads/$name^0" -- 2>/dev/null)" ||
  42         if [ -n "$force" ]; then
  43                 info "invalid branch name: $name; assuming it has been deleted already"
  44         else
  45                 die "invalid branch name: $name"
  46         fi
  47 baserev="$(git rev-parse --verify "refs/$topbases/$name^0" -- 2>/dev/null)" ||
  48         die "not a TopGit topic branch: $name"
  49 ! headsym="$(git symbolic-ref -q HEAD)" || [ "$headsym" != "refs/heads/$name" ] || {
  50         [ -n "$force" ] && [ "$force" -ge 2 ] || die "cannot delete your current branch"
  51         warn "detaching HEAD to delete current branch"
  52         git update-ref -m "tgdelete: detach HEAD to delete $name" --no-deref HEAD "$branchrev" || die "detach failed"
  53         warn "$(git --no-pager log -n 1 --format=format:'HEAD is now at %h... %s' HEAD)"
  54 }
  55
  56 [ -z "$force" ] && { branch_empty "$name" || die "branch is non-empty: $name"; }
  57
  58 # Quick'n'dirty check whether branch is required
  59 [ -n "$force" ] || ! tg summary --tgish-only --deps | cut -d ' ' -f2- | tr ' ' '\n' | grep -Fxq -- "$name" ||
  60         die "some branch depends on $name"
  61
  62 ensure_ident_available
  63
  64 # always auto stash even if it's just to the anonymous stash TG_STASH
  65
  66 stashmsg="tgdelete: autostash before delete branch $name"
  67 if [ -n "$stash" ]; then
  68         tg tag -q -q -m "$stashmsg" --stash $name &&
  69         stashhash="$(git rev-parse --quiet --verify refs/tgstash --)" &&
  70         [ -n "$stashhash" ] &&
  71         [ "$(git cat-file -t "$stashhash" 2>/dev/null)" = "tag" ] ||
  72         die "requested --stash failed"
  73 else
  74         tg tag --anonymous $name &&
  75         stashhash="$(git rev-parse --quiet --verify TG_STASH --)" &&
  76         [ -n "$stashhash" ] &&
  77         [ "$(git cat-file -t "$stashhash" 2>/dev/null)" = "tag" ] ||
  78         die "anonymous --stash failed"
  79 fi
  80
  81 ## Wipe out
  82
  83 git update-ref -d "refs/$topbases/$name" "$baserev"
  84 [ -z "$branchrev" ] || git update-ref -d "refs/heads/$name" "$branchrev"