git-parse-remote

   1 : To be included in git-pull and git-fetch scripts.
   2
   3 # A remote repository can be specified on the command line
   4 # in one of the following formats:
   5 #
   6 #       <repo>
   7 #       <repo> <head>
   8 #       <repo> tag <tag>
   9 #
  10 # where <repo> could be one of:
  11 #
  12 #       a URL (including absolute or local pathname)
  13 #       a short-hand
  14 #       a short-hand followed by a trailing path
  15 #
  16 # A short-hand <name> has a corresponding file $GIT_DIR/branches/<name>,
  17 # whose contents is a URL, possibly followed by a URL fragment #<head>
  18 # to name the default branch on the remote side to fetch from.
  19
  20 _remote_repo= _remote_store= _remote_head= _remote_name=
  21
  22 case "$1" in
  23 *:* | /* | ../* | ./* )
  24         _remote_repo="$1"
  25         ;;
  26 * )
  27         # otherwise, it is a short hand.
  28         case "$1" in
  29         */*)
  30                 # a short-hand followed by a trailing path
  31                 _token=$(expr "$1" : '\([^/]*\)/')
  32                 _rest=$(expr "$1" : '[^/]*\(/.*\)$')
  33                 ;;
  34         *)
  35                 _token="$1"
  36                 _rest=
  37                 _remote_store="refs/heads/$_token"
  38                 ;;
  39         esac
  40         test -f "$GIT_DIR/branches/$_token" ||
  41         die "No such remote branch: $_token"
  42
  43         _remote_repo=$(cat "$GIT_DIR/branches/$_token")"$_rest"
  44         ;;
  45 esac
  46
  47 case "$_remote_repo" in
  48 *"#"*)
  49         _remote_head=`expr "$_remote_repo" : '.*#\(.*\)$'`
  50         _remote_repo=`expr "$_remote_repo" : '\(.*\)#'`
  51         ;;
  52 esac
  53
  54 _remote_name=$(echo "$_remote_repo" | sed 's|\.git/*$||')
  55
  56 case "$2" in
  57 tag)
  58         _remote_name="tag '$3' of $_remote_name"
  59         _remote_head="refs/tags/$3"
  60         _remote_store="$_remote_head"
  61         ;;
  62 ?*)
  63         # command line specified a head explicitly; do not
  64         # store the fetched head as a branch head.
  65         _remote_name="head '$2' of $_remote_name"
  66         _remote_head="refs/heads/$2"
  67         _remote_store=''
  68         ;;
  69 '')
  70         case "$_remote_head" in
  71         '')
  72                 _remote_head=HEAD ;;
  73         *)
  74                 _remote_head="refs/heads/$_remote_head"
  75                 _remote_name="head '$_remote_head' of $_remote_name"
  76                 ;;
  77         esac
  78         ;;
  79 esac