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/$name/*"
  42         fi
  43         # see if we have any remote bases
  44         rc=0 remotebases=
  45         remotebases="$(
  46                 git for-each-ref --format='%(refname)' "refs/remotes/$name" 2>/dev/null |
  47                 run_awk_ref_prefixes -n -- "refs/remotes/$name/{top-bases}" "refs/remotes/$name/top-bases" "refs/remotes/$name")" ||
  48                 rc=$?
  49         if [ "$rc" = "65" ]; then
  50                 err "remote \"$name\" has top-bases in both locations:"
  51                 err "  refs/remotes/$name/{top-bases}/..."
  52                 err "  refs/remotes/$name/top-bases/..."
  53                 err "set \"topgit.top-bases\" to \"heads\" for the first, preferred location"
  54                 err "or set \"topgit.top-bases\" to \"refs\" for the second, old location"
  55                 err "(the \"-c topgit.top-bases=<val>\" option can be used for this)"
  56                 err "then re-run the tg remote command"
  57                 err "(the tg migrate-bases command can also help with this problem)"
  58                 die "schizophrenic remote \"$name\" requires topgit.top-bases setting"
  59         fi
  60         if [ -n "$remotebases" ]; then
  61                 val="heads"
  62                 [ "$remotebases" = "refs/remotes/$name/{top-bases}" ] || val="refs"
  63                 GIT_CONFIG_PARAMETERS="${GIT_CONFIG_PARAMETERS:+$GIT_CONFIG_PARAMETERS }'topgit.top-bases=$val'"
  64                 export GIT_CONFIG_PARAMETERS
  65                 unset tg_topbases_set
  66                 set_topbases
  67         fi
  68 fi
  69
  70 ## Configure the remote
  71
  72 git config --replace-all "remote.$name.fetch" "+refs/$topbases/*:refs/remotes/$name/${topbases#heads/}/*" \
  73         "\\+?refs/(top-bases|heads/[{]top-bases[}])/\\*:refs/remotes/$name/(top-bases|[{]top-bases[}])/\\*"
  74
  75 if git config --get-all "remote.$name.push" "\\+refs/top-bases/\\*:refs/top-bases/\\*" >/dev/null && test "xtrue" != "x$(git config --bool --get topgit.dontwarnonoldpushspecs)"; then
  76         info "Probably you want to remove the push specs introduced by an old version of topgit:"
  77         info '       git config --unset-all "remote.'"$name"'.push" "\\+refs/top-bases/\\*:refs/top-bases/\\*"'
  78         info '       git config --unset-all "remote.'"$name"'.push" "\\+refs/heads/\\*:refs/heads/\\*"'
  79         info '(or use git config --bool --add topgit.dontwarnonoldpushspecs true to get rid of this warning)'
  80 fi
  81
  82 info "Remote $name can now follow TopGit topic branches."
  83 if [ -z "$populate" ]; then
  84         info "Next, do: git fetch $name"
  85         exit
  86 fi
  87
  88
  89 ## Populate local branches
  90
  91 info "Populating local topic branches from remote '$name'..."
  92
  93 ## The order of refspecs is very important, because both heads and
  94 ## $topbases are mapped under the same namespace refs/remotes/$name.
  95 ## If we put the 2nd refspec before the 1st one, stale refs reverse
  96 ## lookup would fail and "refs/remotes/$name/$topbases/XX" reverse
  97 ## lookup as a non-exist "refs/heads/$topbases/XX", and would be
  98 ## deleted by accident.
  99 [ -n "$fetchdone" ] || git fetch --prune "$name" \
 100         "+refs/$topbases/*:refs/remotes/$name/${topbases#heads/}/*" \
 101         "+refs/heads/*:refs/remotes/$name/*"
 102
 103 git for-each-ref --format='%(objectname) %(refname)' "refs/remotes/$name/${topbases#heads/}" |
 104         while read rev ref; do
 105                 branch="${ref#refs/remotes/$name/${topbases#heads/}/}"
 106                 if ! git rev-parse --verify "refs/remotes/$name/$branch^0" -- >/dev/null 2>&1; then
 107                         info "Skipping remote $name/${topbases#heads/}/$branch that's missing its branch"
 108                         continue
 109                 fi
 110                 if git rev-parse --verify "refs/heads/$branch^0" -- >/dev/null 2>&1; then
 111                         git rev-parse --verify "refs/$topbases/$branch^0" -- >/dev/null 2>&1 || {
 112                                 init_reflog "refs/$topbases/$branch"
 113                                 git update-ref "refs/$topbases/$branch" "$rev^0"
 114                         }
 115                         info "Skipping branch $branch: Already exists"
 116                         continue
 117                 fi
 118                 info "Adding branch $branch..."
 119                 init_reflog "refs/$topbases/$branch"
 120                 git update-ref "refs/$topbases/$branch" "$rev^0"
 121                 git update-ref "refs/heads/$branch" "$(git rev-parse --verify "refs/remotes/$name/$branch^0" --)"
 122         done
 123
 124 git config "topgit.remote" "$name"
 125 info "The remote '$name' is now the default source of topic branches."