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 "$1" && (cd .git ; pwd)) 2> /dev/null
  15 }
  16
  17 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  18     curl_extra_args="-k"
  19 fi
  20
  21 http_fetch () {
  22         # $1 = Remote, $2 = Local
  23         curl -nsf $curl_extra_args "$1" >"$2"
  24 }
  25
  26 clone_dumb_http () {
  27         # $1 - remote, $2 - local
  28         cd "$2" &&
  29         clone_tmp='.git/clone-tmp' &&
  30         mkdir -p "$clone_tmp" || exit 1
  31         http_fetch "$1/info/refs" "$clone_tmp/refs" &&
  32         http_fetch "$1/objects/info/packs" "$clone_tmp/packs" || {
  33                 echo >&2 "Cannot get remote repository information.
  34 Perhaps git-update-server-info needs to be run there?"
  35                 exit 1;
  36         }
  37         while read type name
  38         do
  39                 case "$type" in
  40                 P) ;;
  41                 *) continue ;;
  42                 esac &&
  43
  44                 idx=`expr "$name" : '\(.*\)\.pack'`.idx
  45                 http_fetch "$1/objects/pack/$name" ".git/objects/pack/$name" &&
  46                 http_fetch "$1/objects/pack/$idx" ".git/objects/pack/$idx" &&
  47                 git-verify-pack ".git/objects/pack/$idx" || exit 1
  48         done <"$clone_tmp/packs"
  49
  50         while read sha1 refname
  51         do
  52                 name=`expr "$refname" : 'refs/\(.*\)'` &&
  53                 git-http-pull -v -a -w "$name" "$name" "$1/" || exit 1
  54         done <"$clone_tmp/refs"
  55         rm -fr "$clone_tmp"
  56 }
  57
  58 quiet=
  59 use_local=no
  60 local_shared=no
  61 upload_pack=
  62 while
  63         case "$#,$1" in
  64         0,*) break ;;
  65         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  66         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  67           local_shared=yes ;;
  68         *,-q|*,--quiet) quiet=-q ;;
  69         1,-u|1,--upload-pack) usage ;;
  70         *,-u|*,--upload-pack)
  71                 shift
  72                 upload_pack="--exec=$1" ;;
  73         *,-*) usage ;;
  74         *) break ;;
  75         esac
  76 do
  77         shift
  78 done
  79
  80 # Turn the source into an absolute path if
  81 # it is local
  82 repo="$1"
  83 local=no
  84 if base=$(get_repo_base "$repo"); then
  85         repo="$base"
  86         local=yes
  87 fi
  88
  89 dir="$2"
  90 mkdir "$dir" &&
  91 D=$(
  92         (cd "$dir" && git-init-db && pwd)
  93 ) &&
  94 test -d "$D" || usage
  95
  96 # We do local magic only when the user tells us to.
  97 case "$local,$use_local" in
  98 yes,yes)
  99         ( cd "$repo/objects" ) || {
 100                 echo >&2 "-l flag seen but $repo is not local."
 101                 exit 1
 102         }
 103
 104         case "$local_shared" in
 105         no)
 106             # See if we can hardlink and drop "l" if not.
 107             sample_file=$(cd "$repo" && \
 108                           find objects -type f -print | sed -e 1q)
 109
 110             # objects directory should not be empty since we are cloning!
 111             test -f "$repo/$sample_file" || exit
 112
 113             l=
 114             if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
 115             then
 116                     l=l
 117             fi &&
 118             rm -f "$D/.git/objects/sample" &&
 119             cd "$repo" &&
 120             find objects -type f -print |
 121             cpio -puamd$l "$D/.git/" || exit 1
 122             ;;
 123         yes)
 124             mkdir -p "$D/.git/objects/info"
 125             {
 126                 test -f "$repo/objects/info/alternates" &&
 127                 cat "$repo/objects/info/alternates";
 128                 echo "$repo/objects"
 129             } >"$D/.git/objects/info/alternates"
 130             ;;
 131         esac
 132
 133         # Make a duplicate of refs and HEAD pointer
 134         HEAD=
 135         if test -f "$repo/HEAD"
 136         then
 137                 HEAD=HEAD
 138         fi
 139         tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || exit 1
 140         ;;
 141 *)
 142         case "$repo" in
 143         rsync://*)
 144                 rsync $quiet -avz --ignore-existing "$repo/objects/" "$D/.git/objects/" &&
 145                 rsync $quiet -avz --ignore-existing "$repo/refs/" "$D/.git/refs/"
 146                 ;;
 147         http://*)
 148                 clone_dumb_http "$repo" "$D"
 149                 ;;
 150         *)
 151                 cd "$D" && case "$upload_pack" in
 152                 '') git-clone-pack $quiet "$repo" ;;
 153                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 154                 esac
 155                 ;;
 156         esac
 157         ;;
 158 esac
 159
 160 # Update origin.
 161 mkdir -p "$D/.git/remotes/" &&
 162 rm -f "$D/.git/remotes/origin" &&
 163 echo >"$D/.git/remotes/origin" \
 164 "URL: $repo
 165 Pull: master:origin"