tg-annihilate.sh

   1 #!/bin/sh
   2 # TopGit - A different patch queue manager
   3 # (C) Petr Baudis <pasky@suse.cz>  2008
   4 # (C) Per Cederqvist <ceder@lysator.liu.se>  2010
   5 # (C) Kyle J. McKay <mackyle@gmail.com>  2017
   6 # All rights reserved.
   7 # GPLv2
   8
   9 force= # Whether to annihilate non-empty branch, or branch where only the base is left.
  10 update=1 # Whether to run tg update on affected branches
  11
  12
  13 ## Parse options
  14
  15 while [ -n "$1" ]; do
  16         arg="$1"; shift
  17         case "$arg" in
  18         -f|--force)
  19                 force=1;;
  20         --no-update)
  21                 update=;;
  22         --update)
  23                 update=1;;
  24         *)
  25                 echo "Usage: ${tgname:-tg} [...] annihilate [-f] [--no-update]" >&2
  26                 exit 1;;
  27         esac
  28 done
  29
  30
  31 ## Sanity checks
  32
  33 v_verify_topgit_branch name HEAD
  34 ! branch_annihilated "$name" || die "TopGit branch $name is already annihilated."
  35
  36 [ -z "$force" ] && { branch_empty "$name" || die "branch is non-empty: $name"; }
  37
  38 ## Annihilate
  39 ensure_clean_tree
  40 ensure_clean_topfiles
  41 ensure_ident_available
  42 alldeps="$(get_temp alldeps)"
  43 tg --no-pager summary --deps >"$alldeps" || die "tg summary --deps failed"
  44 mb="$(git merge-base "refs/$topbases/$name" "refs/heads/$name")"
  45 git read-tree "$mb^{tree}"
  46 # Need to pass --no-verify in order to inhibit TopGit's pre-commit hook to run,
  47 # which would bark upon missing .top* files.
  48 git commit --no-verify -m"TopGit branch $name annihilated."
  49
  50 # Propagate the dependencies through to dependents (if any), if they don't already have them
  51 dependencies="$(awk -v annb="$name" 'NF == 2 && $2 != "" && $1 == annb { print $2 }' <"$alldeps")"
  52 updatelist=
  53 while read dependent && [ -n "$dependent" ]; do
  54         # to avoid ambiguity with checkout -f we must use symbolic-ref + reset
  55         git symbolic-ref HEAD "refs/heads/$dependent"
  56         git reset -q --hard
  57         needupdate=
  58         while read dependency && [ -n "$dependency" ]; do
  59                 ! tg depend add --no-update "$dependency" >/dev/null 2>&1 || needupdate=1
  60         done <<-EOT
  61         $dependencies
  62         EOT
  63         [ -z "$needupdate" ] || updatelist="${updatelist:+$updatelist }$dependent"
  64 done <<EOT
  65 $(awk -v annb="$name" 'NF == 2 && $1 != "" && $2 == annb { print $1 }' <"$alldeps")
  66 EOT
  67
  68 info "branch successfully annihilated: $name"
  69 now="now"
  70 if [ -n "$updatelist" ]; then
  71         if [ -n "$update" ]; then
  72                 now="after the update completes"
  73         else
  74                 info "skipping update because --no-update given"
  75                 info "be sure to update affected branches: $updatelist"
  76                 now="after updating"
  77         fi
  78 fi
  79 info "If you have shared your work, you might want to run ${tgname:-tg} push $name $now."
  80 if [ -n "$updatelist" ] && [ -n "$update" ]; then
  81         info "now updating affected branches: $updatelist"
  82         set -- $updatelist
  83         . "$TG_INST_CMDDIR"/tg-update
  84 fi