git-clone-script

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, Linus Torvalds
   4 # Copyright (c) 2005, Junio C Hamano
   5 #
   6 # Clone a repository into a different directory that does not yet exist.
   7
   8 usage() {
   9         echo >&2 "* git clone [-l [-s]] [-q] [-u <upload-pack>] <repo> <dir>"
  10         exit 1
  11 }
  12
  13 get_repo_base() {
  14         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  15 }
  16
  17 quiet=
  18 use_local=no
  19 local_shared=no
  20 upload_pack=
  21 while
  22         case "$#,$1" in
  23         0,*) break ;;
  24         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  25         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  26           local_shared=yes ;;
  27         *,-q|*,--quiet) quiet=-q ;;
  28         1,-u|1,--upload-pack) usage ;;
  29         *,-u|*,--upload-pack)
  30                 shift
  31                 upload_pack="--exec=$1" ;;
  32         *,-*) usage ;;
  33         *) break ;;
  34         esac
  35 do
  36         shift
  37 done
  38
  39 # Turn the source into an absolute path if
  40 # it is local
  41 repo="$1"
  42 local=no
  43 if base=$(get_repo_base "$repo"); then
  44         repo="$base"
  45         local=yes
  46 fi
  47
  48 dir="$2"
  49 mkdir "$dir" &&
  50 D=$(
  51         (cd "$dir" && git-init-db && pwd)
  52 ) &&
  53 test -d "$D" || usage
  54
  55 # We do local magic only when the user tells us to.
  56 case "$local,$use_local" in
  57 yes,yes)
  58         ( cd "$repo/objects" ) || {
  59                 echo >&2 "-l flag seen but $repo is not local."
  60                 exit 1
  61         }
  62
  63         case "$local_shared" in
  64         no)
  65             # See if we can hardlink and drop "l" if not.
  66             sample_file=$(cd "$repo" && \
  67                           find objects -type f -print | sed -e 1q)
  68
  69             # objects directory should not be empty since we are cloning!
  70             test -f "$repo/$sample_file" || exit
  71
  72             l=
  73             if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
  74             then
  75                     l=l
  76             fi &&
  77             rm -f "$D/.git/objects/sample" &&
  78             cd "$repo" &&
  79             find objects -type f -print |
  80             cpio -puamd$l "$D/.git/" || exit 1
  81             ;;
  82         yes)
  83             mkdir -p "$D/.git/objects/info"
  84             echo "$repo/objects" >"$D/.git/objects/info/alternates"
  85             ;;
  86         esac
  87
  88         # Make a duplicate of refs and HEAD pointer
  89         HEAD=
  90         if test -f "$repo/HEAD"
  91         then
  92                 HEAD=HEAD
  93         fi
  94         tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || exit 1
  95         ;;
  96 *)
  97         case "$repo" in
  98         rsync://*)
  99                 rsync $quiet -avz --ignore-existing "$repo/objects/" "$D/.git/objects/" &&
 100                 rsync $quiet -avz --ignore-existing "$repo/refs/" "$D/.git/refs/"
 101                 ;;
 102         http://*)
 103                 git-clone-dumb-http "$repo" "$D"
 104                 case "$?" in
 105                 2)
 106                         echo "Somebody should define smarter http server protocol" >&2
 107                         exit 1
 108                         ;;
 109                 0)
 110                         ;;
 111                 *)
 112                         exit
 113                 esac
 114                 ;;
 115         *)
 116                 cd "$D" && case "$upload_pack" in
 117                 '') git-clone-pack $quiet "$repo" ;;
 118                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 119                 esac
 120                 ;;
 121         esac
 122         ;;
 123 esac
 124
 125 # Update origin.
 126 mkdir -p "$D/.git/branches/" &&
 127 rm -f "$D/.git/branches/origin" &&
 128 echo "$repo" >"$D/.git/branches/origin"