git-parse-remote.sh

   1 # This is a shell library to calculate the remote repository and
   2 # upstream branch that should be pulled by "git pull" from the current
   3 # branch.
   4
   5 # git-ls-remote could be called from outside a git managed repository;
   6 # this would fail in that case and would issue an error message.
   7 GIT_DIR=$(git rev-parse -q --git-dir) || :;
   8
   9 get_default_remote () {
  10         curr_branch=$(git symbolic-ref -q HEAD)
  11         curr_branch="${curr_branch#refs/heads/}"
  12         origin=$(git config --get "branch.$curr_branch.remote")
  13         echo ${origin:-origin}
  14 }
  15
  16 get_remote_merge_branch () {
  17         case "$#" in
  18         0|1)
  19             origin="$1"
  20             default=$(get_default_remote)
  21             test -z "$origin" && origin=$default
  22             curr_branch=$(git symbolic-ref -q HEAD) &&
  23             [ "$origin" = "$default" ] &&
  24             echo $(git for-each-ref --format='%(upstream)' $curr_branch)
  25             ;;
  26         *)
  27             repo=$1
  28             shift
  29             ref=$1
  30             # FIXME: It should return the tracking branch
  31             #        Currently only works with the default mapping
  32             case "$ref" in
  33             +*)
  34                 ref=$(expr "z$ref" : 'z+\(.*\)')
  35                 ;;
  36             esac
  37             expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
  38             remote=$(expr "z$ref" : 'z\([^:]*\):')
  39             case "$remote" in
  40             '' | HEAD ) remote=HEAD ;;
  41             heads/*) remote=${remote#heads/} ;;
  42             refs/heads/*) remote=${remote#refs/heads/} ;;
  43             refs/* | tags/* | remotes/* ) remote=
  44             esac
  45             [ -n "$remote" ] && case "$repo" in
  46                 .)
  47                     echo "refs/heads/$remote"
  48                     ;;
  49                 *)
  50                     echo "refs/remotes/$repo/$remote"
  51                     ;;
  52             esac
  53         esac
  54 }
  55
  56 error_on_missing_default_upstream () {
  57         cmd="$1"
  58         op_type="$2"
  59         op_prep="$3"
  60         example="$4"
  61         branch_name=$(git symbolic-ref -q HEAD)
  62         # If there's only one remote, use that in the suggestion
  63         remote="<remote>"
  64         if test $(git remote | wc -l) = 1
  65         then
  66                 remote=$(git remote)
  67         fi
  68
  69         if test -z "$branch_name"
  70         then
  71                 echo "You are not currently on a branch. Please specify which
  72 branch you want to $op_type $op_prep. See git-${cmd}(1) for details.
  73
  74     $example
  75 "
  76         else
  77                 echo "There is no tracking information for the current branch.
  78 Please specify which branch you want to $op_type $op_prep.
  79 See git-${cmd}(1) for details
  80
  81     $example
  82
  83 If you wish to set tracking information for this branch you can do so with:
  84
  85     git branch --set-upstream-to=$remote/<branch> ${branch_name#refs/heads/}
  86 "
  87         fi
  88         exit 1
  89 }