tg-remote.sh

   1 #!/bin/sh
   2 # TopGit - A different patch queue manager
   3 # (C) Petr Baudis <pasky@suse.cz>  2008
   4 # (C) Kyle J. McKay <mackyle@gmail.com>  2016,2017
   5 # All rights reserved.
   6 # GPLv2
   7
   8 populate= # Set to 1 if we shall seed local branches with this
   9 name=
  10
  11
  12 ## Parse options
  13
  14 while [ -n "$1" ]; do
  15         arg="$1"; shift
  16         case "$arg" in
  17         --populate)
  18                 populate=1;;
  19         -*)
  20                 echo "Usage: ${tgname:-tg} [...] remote [--populate] [<remote>]" >&2
  21                 exit 1;;
  22         *)
  23                 name="$arg";;
  24         esac
  25 done
  26
  27 [ -n "$name" ] ||
  28         name="$base_remote"
  29
  30 git config "remote.$name.url" >/dev/null || die "unknown remote '$name'"
  31
  32 fetchdone=
  33 if [ -n "$topbases_implicit_default" ]; then
  34         # set $topbases based on remote bases as the local repository does not have
  35         # any bases already present and has not explicitly set topgit.top-bases
  36         if [ -n "$populate" ]; then
  37                 # Do the fetch now but fetch both old and new top-bases
  38                 fetchdone=1
  39                 git fetch --prune "$name" \
  40                         "+refs/top-bases/*:refs/remotes/$name/top-bases/*" \
  41                         "+refs/heads/*:refs/remotes/$name/*"
  42         fi
  43         # see if we have any remote bases
  44         remotebases=
  45         check_remote_topbases "$name" remotebases
  46         if [ -n "$remotebases" ]; then
  47                 val="heads"
  48                 [ "$remotebases" = "refs/remotes/$name/{top-bases}" ] || val="refs"
  49                 GIT_CONFIG_PARAMETERS="${GIT_CONFIG_PARAMETERS:+$GIT_CONFIG_PARAMETERS }'topgit.top-bases=$val'"
  50                 export GIT_CONFIG_PARAMETERS
  51                 unset tg_topbases_set
  52                 set_topbases
  53         fi
  54 fi
  55
  56 ## Configure the remote
  57
  58 git config --replace-all "remote.$name.fetch" "+refs/$topbases/*:refs/remotes/$name/${topbases#heads/}/*" \
  59         "\\+?refs/(top-bases|heads/[{]top-bases[}])/\\*:refs/remotes/$name/(top-bases|[{]top-bases[}])/\\*"
  60
  61 if git config --get-all "remote.$name.push" "\\+refs/top-bases/\\*:refs/top-bases/\\*" >/dev/null && test "xtrue" != "x$(git config --bool --get topgit.dontwarnonoldpushspecs)"; then
  62         info "Probably you want to remove the push specs introduced by an old version of topgit:"
  63         info '       git config --unset-all "remote.'"$name"'.push" "\\+refs/top-bases/\\*:refs/top-bases/\\*"'
  64         info '       git config --unset-all "remote.'"$name"'.push" "\\+refs/heads/\\*:refs/heads/\\*"'
  65         info '(or use git config --bool --add topgit.dontwarnonoldpushspecs true to get rid of this warning)'
  66 fi
  67
  68 info "Remote $name can now follow TopGit topic branches."
  69 if [ -z "$populate" ]; then
  70         info "Next, do: git fetch $name"
  71         exit
  72 fi
  73
  74
  75 ## Populate local branches
  76
  77 info "Populating local topic branches from remote '$name'..."
  78
  79 ## The order of refspecs is very important, because both heads and
  80 ## $topbases are mapped under the same namespace refs/remotes/$name.
  81 ## If we put the 2nd refspec before the 1st one, stale refs reverse
  82 ## lookup would fail and "refs/remotes/$name/$topbases/XX" reverse
  83 ## lookup as a non-exist "refs/heads/$topbases/XX", and would be
  84 ## deleted by accident.
  85 [ -n "$fetchdone" ] || git fetch --prune "$name" \
  86         "+refs/$topbases/*:refs/remotes/$name/${topbases#heads/}/*" \
  87         "+refs/heads/*:refs/remotes/$name/*"
  88
  89 git for-each-ref --format='%(objectname) %(refname)' "refs/remotes/$name/${topbases#heads/}" |
  90         while read rev ref; do
  91                 branch="${ref#refs/remotes/$name/${topbases#heads/}/}"
  92                 if ! git rev-parse --verify "refs/remotes/$name/$branch^0" -- >/dev/null 2>&1; then
  93                         info "Skipping remote $name/${topbases#heads/}/$branch that's missing its branch"
  94                         continue
  95                 fi
  96                 if git rev-parse --verify "refs/heads/$branch^0" -- >/dev/null 2>&1; then
  97                         git rev-parse --verify "refs/$topbases/$branch^0" -- >/dev/null 2>&1 || {
  98                                 init_reflog "refs/$topbases/$branch"
  99                                 git update-ref "refs/$topbases/$branch" "$rev^0"
 100                         }
 101                         info "Skipping branch $branch: Already exists"
 102                         continue
 103                 fi
 104                 info "Adding branch $branch..."
 105                 init_reflog "refs/$topbases/$branch"
 106                 git update-ref "refs/$topbases/$branch" "$rev^0"
 107                 git update-ref "refs/heads/$branch" "$(git rev-parse --verify "refs/remotes/$name/$branch^0" --)"
 108         done
 109
 110 git config "topgit.remote" "$name"
 111 info "The remote '$name' is now the default source of topic branches."