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 use_local=no
  14 while
  15         case "$#,$1" in
  16         0,*) break ;;
  17         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  18         *,-*) usage ;;
  19         *) break ;;
  20         esac
  21 do
  22         shift
  23 done
  24
  25 repo="$1"
  26 dir="$2"
  27 mkdir "$dir" &&
  28 D=$(
  29         (cd "$dir" && git-init-db && pwd)
  30 ) &&
  31 test -d "$D" || usage
  32
  33 # We do local magic only when the user tells us to.
  34 case "$use_local" in
  35 yes)
  36         ( cd "$repo/objects" ) || {
  37                 repo="$repo/.git"
  38                 ( cd "$repo/objects" ) || {
  39                     echo >&2 "-l flag seen but $repo is not local."
  40                     exit 1
  41                 }
  42         }
  43
  44         # See if we can hardlink and drop "l" if not.
  45         sample_file=$(cd "$repo" && \
  46                       find objects -type f -print | sed -e 1q)
  47
  48         # objects directory should not be empty since we are cloning!
  49         test -f "$repo/$sample_file" || exit
  50
  51         l=
  52         if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
  53         then
  54                 l=l
  55         fi &&
  56         rm -f "$D/.git/objects/sample" &&
  57         cp -r$l "$repo/objects" "$D/.git/" || exit 1
  58
  59         # Make a duplicate of refs and HEAD pointer
  60         HEAD=
  61         if test -f "$repo/HEAD"
  62         then
  63                 HEAD=HEAD
  64         fi
  65         tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || exit 1
  66         exit 0
  67         ;;
  68 esac
  69
  70 cd "$D" && git clone-pack "$repo"