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] <repo> <dir>"
  10         exit 1
  11 }
  12
  13 get_repo_base() {
  14         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  15 }
  16
  17 quiet=
  18 use_local=no
  19 while
  20         case "$#,$1" in
  21         0,*) break ;;
  22         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  23         *,-q|*,--quiet) quiet=-q ;;
  24         *,-*) usage ;;
  25         *) break ;;
  26         esac
  27 do
  28         shift
  29 done
  30
  31 # Turn the source into an absolute path if
  32 # it is local
  33 repo="$1"
  34 local=no
  35 if base=$(get_repo_base "$repo"); then
  36         repo="$base"
  37         local=yes
  38 fi
  39
  40 dir="$2"
  41 mkdir "$dir" &&
  42 D=$(
  43         (cd "$dir" && git-init-db && pwd)
  44 ) &&
  45 test -d "$D" || usage
  46
  47 # We do local magic only when the user tells us to.
  48 case "$local,$use_local" in
  49 yes,yes)
  50         ( cd "$repo/objects" ) || {
  51                 repo="$repo/.git"
  52                 ( cd "$repo/objects" ) || {
  53                     echo >&2 "-l flag seen but $repo is not local."
  54                     exit 1
  55                 }
  56         }
  57
  58         # See if we can hardlink and drop "l" if not.
  59         sample_file=$(cd "$repo" && \
  60                       find objects -type f -print | sed -e 1q)
  61
  62         # objects directory should not be empty since we are cloning!
  63         test -f "$repo/$sample_file" || exit
  64
  65         l=
  66         if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
  67         then
  68                 l=l
  69         fi &&
  70         rm -f "$D/.git/objects/sample" &&
  71         cp -r$l "$repo/objects" "$D/.git/" || exit 1
  72
  73         # Make a duplicate of refs and HEAD pointer
  74         HEAD=
  75         if test -f "$repo/HEAD"
  76         then
  77                 HEAD=HEAD
  78         fi
  79         tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || exit 1
  80         exit 0
  81         ;;
  82 esac
  83
  84 case "$repo" in
  85 rsync://*)
  86         rsync $quiet -avz --ignore-existing "$repo/objects/" "$D/.git/objects/" &&
  87         rsync $quiet -avz --ignore-existing "$repo/refs/" "$D/.git/refs/"
  88         ;;
  89 http://*)
  90         echo "Somebody should add http fetch" >&2
  91         exit 1
  92         ;;
  93 *)
  94         cd "$D" && git-clone-pack $quiet "$repo"
  95         ;;
  96 esac