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/$name/*"
  42         fi
  43         # see if we have any remote bases
  44         sawnew=
  45         sawold=
  46         while read -r rn && [ -n "$rn" ]; do
  47                 case "$rn" in
  48                         "refs/remotes/$name/{top-bases}"/?*)
  49                                 sawnew=1;;
  50                         "refs/remotes/$name/top-bases"/?*)
  51                                 sawold=1;;
  52                 esac
  53                 [ "$sawnew$sawold" != "11" ] || break
  54         done <<-EOT
  55                 $(git for-each-ref --format='%(refname)' "refs/remotes/$name/{top-bases}" "refs/remotes/$name/top-bases")
  56         EOT
  57         if [ "$sawold$sawnew" = "11" ]; then
  58                 err "remote \"$name\" has top-bases in both locations:"
  59                 err "  refs/remotes/$name/{top-bases}/..."
  60                 err "  refs/remotes/$name/top-bases/..."
  61                 err "set \"topgit.top-bases\" to \"heads\" for the first, preferred location"
  62                 err "or set \"topgit.top-bases\" to \"refs\" for the second, old location"
  63                 err "(the \"-c topgit.top-bases=<val>\" option can be used for this)"
  64                 err "then re-run the tg remote command"
  65                 err "(the tg migrate-bases command can also help with this problem)"
  66                 die "schizophrenic remote \"$name\" requires topgit.top-bases setting"
  67         fi
  68         if [ -n "$sawold$sawnew" ]; then
  69                 val="heads"
  70                 [ -z "$sawold" ] || val="refs"
  71                 GIT_CONFIG_PARAMETERS="${GIT_CONFIG_PARAMETERS:+$GIT_CONFIG_PARAMETERS }'topgit.top-bases=$val'"
  72                 export GIT_CONFIG_PARAMETERS
  73                 unset tg_topbases_set
  74                 set_topbases
  75         fi
  76 fi
  77
  78 ## Configure the remote
  79
  80 git config --replace-all "remote.$name.fetch" "+refs/$topbases/*:refs/remotes/$name/${topbases#heads/}/*" \
  81         "\\+?refs/(top-bases|heads/[{]top-bases[}])/\\*:refs/remotes/$name/(top-bases|[{]top-bases[}])/\\*"
  82
  83 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
  84         info "Probably you want to remove the push specs introduced by an old version of topgit:"
  85         info '       git config --unset-all "remote.'"$name"'.push" "\\+refs/top-bases/\\*:refs/top-bases/\\*"'
  86         info '       git config --unset-all "remote.'"$name"'.push" "\\+refs/heads/\\*:refs/heads/\\*"'
  87         info '(or use git config --bool --add topgit.dontwarnonoldpushspecs true to get rid of this warning)'
  88 fi
  89
  90 info "Remote $name can now follow TopGit topic branches."
  91 if [ -z "$populate" ]; then
  92         info "Next, do: git fetch $name"
  93         exit
  94 fi
  95
  96
  97 ## Populate local branches
  98
  99 info "Populating local topic branches from remote '$name'..."
 100
 101 ## The order of refspecs is very important, because both heads and
 102 ## $topbases are mapped under the same namespace refs/remotes/$name.
 103 ## If we put the 2nd refspec before the 1st one, stale refs reverse
 104 ## lookup would fail and "refs/remotes/$name/$topbases/XX" reverse
 105 ## lookup as a non-exist "refs/heads/$topbases/XX", and would be
 106 ## deleted by accident.
 107 [ -n "$fetchdone" ] || git fetch --prune "$name" \
 108         "+refs/$topbases/*:refs/remotes/$name/${topbases#heads/}/*" \
 109         "+refs/heads/*:refs/remotes/$name/*"
 110
 111 git for-each-ref --format='%(objectname) %(refname)' "refs/remotes/$name/${topbases#heads/}" |
 112         while read rev ref; do
 113                 branch="${ref#refs/remotes/$name/${topbases#heads/}/}"
 114                 if ! git rev-parse --verify "refs/remotes/$name/$branch" -- >/dev/null 2>&1; then
 115                         info "Skipping remote $name/${topbases#heads/}/$branch that's missing its branch"
 116                         continue
 117                 fi
 118                 if git rev-parse --verify "refs/heads/$branch" -- >/dev/null 2>&1; then
 119                         git rev-parse --verify "refs/$topbases/$branch" -- >/dev/null 2>&1 || {
 120                                 init_reflog "refs/$topbases/$branch"
 121                                 git update-ref "refs/$topbases/$branch" "$rev"
 122                         }
 123                         info "Skipping branch $branch: Already exists"
 124                         continue
 125                 fi
 126                 info "Adding branch $branch..."
 127                 init_reflog "refs/$topbases/$branch"
 128                 git update-ref "refs/$topbases/$branch" "$rev"
 129                 git update-ref "refs/heads/$branch" "$(git rev-parse --verify "$name/$branch" --)"
 130         done
 131
 132 git config "topgit.remote" "$name"
 133 info "The remote '$name' is now the default source of topic branches."