git-clone.sh

   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 # See git-sh-setup why.
   9 unset CDPATH
  10
  11 usage() {
  12         echo >&2 "* git clone [-l [-s]] [-q] [-u <upload-pack>] [-n] <repo> <dir>"
  13         exit 1
  14 }
  15
  16 get_repo_base() {
  17         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  18 }
  19
  20 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  21     curl_extra_args="-k"
  22 fi
  23
  24 http_fetch () {
  25         # $1 = Remote, $2 = Local
  26         curl -nsf $curl_extra_args "$1" >"$2"
  27 }
  28
  29 clone_dumb_http () {
  30         # $1 - remote, $2 - local
  31         cd "$2" &&
  32         clone_tmp='.git/clone-tmp' &&
  33         mkdir -p "$clone_tmp" || exit 1
  34         http_fetch "$1/info/refs" "$clone_tmp/refs" &&
  35         http_fetch "$1/objects/info/packs" "$clone_tmp/packs" || {
  36                 echo >&2 "Cannot get remote repository information.
  37 Perhaps git-update-server-info needs to be run there?"
  38                 exit 1;
  39         }
  40         while read type name
  41         do
  42                 case "$type" in
  43                 P) ;;
  44                 *) continue ;;
  45                 esac &&
  46
  47                 idx=`expr "$name" : '\(.*\)\.pack'`.idx
  48                 http_fetch "$1/objects/pack/$name" ".git/objects/pack/$name" &&
  49                 http_fetch "$1/objects/pack/$idx" ".git/objects/pack/$idx" &&
  50                 git-verify-pack ".git/objects/pack/$idx" || exit 1
  51         done <"$clone_tmp/packs"
  52
  53         while read sha1 refname
  54         do
  55                 name=`expr "$refname" : 'refs/\(.*\)'` &&
  56                 git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
  57         done <"$clone_tmp/refs"
  58         rm -fr "$clone_tmp"
  59 }
  60
  61 quiet=
  62 use_local=no
  63 local_shared=no
  64 no_checkout=
  65 upload_pack=
  66 while
  67         case "$#,$1" in
  68         0,*) break ;;
  69         *,-n) no_checkout=yes ;;
  70         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  71         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  72           local_shared=yes ;;
  73         *,-q|*,--quiet) quiet=-q ;;
  74         1,-u|1,--upload-pack) usage ;;
  75         *,-u|*,--upload-pack)
  76                 shift
  77                 upload_pack="--exec=$1" ;;
  78         *,-*) usage ;;
  79         *) break ;;
  80         esac
  81 do
  82         shift
  83 done
  84
  85 # Turn the source into an absolute path if
  86 # it is local
  87 repo="$1"
  88 local=no
  89 if base=$(get_repo_base "$repo"); then
  90         repo="$base"
  91         local=yes
  92 fi
  93
  94 dir="$2"
  95 mkdir "$dir" &&
  96 D=$(
  97         (cd "$dir" && git-init-db && pwd)
  98 ) &&
  99 test -d "$D" || usage
 100
 101 # We do local magic only when the user tells us to.
 102 case "$local,$use_local" in
 103 yes,yes)
 104         ( cd "$repo/objects" ) || {
 105                 echo >&2 "-l flag seen but $repo is not local."
 106                 exit 1
 107         }
 108
 109         case "$local_shared" in
 110         no)
 111             # See if we can hardlink and drop "l" if not.
 112             sample_file=$(cd "$repo" && \
 113                           find objects -type f -print | sed -e 1q)
 114
 115             # objects directory should not be empty since we are cloning!
 116             test -f "$repo/$sample_file" || exit
 117
 118             l=
 119             if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
 120             then
 121                     l=l
 122             fi &&
 123             rm -f "$D/.git/objects/sample" &&
 124             cd "$repo" &&
 125             find objects -type f -print |
 126             cpio -puamd$l "$D/.git/" || exit 1
 127             ;;
 128         yes)
 129             mkdir -p "$D/.git/objects/info"
 130             {
 131                 test -f "$repo/objects/info/alternates" &&
 132                 cat "$repo/objects/info/alternates";
 133                 echo "$repo/objects"
 134             } >"$D/.git/objects/info/alternates"
 135             ;;
 136         esac
 137
 138         # Make a duplicate of refs and HEAD pointer
 139         HEAD=
 140         if test -f "$repo/HEAD"
 141         then
 142                 HEAD=HEAD
 143         fi
 144         (cd "$repo" && tar cf - refs $HEAD) |
 145         (cd "$D/.git" && tar xf -) || exit 1
 146         ;;
 147 *)
 148         case "$repo" in
 149         rsync://*)
 150                 rsync $quiet -av --ignore-existing  \
 151                         --exclude info "$repo/objects/" "$D/.git/objects/" &&
 152                 rsync $quiet -av --ignore-existing  \
 153                         --exclude info "$repo/refs/" "$D/.git/refs/" || exit
 154
 155                 # Look at objects/info/alternates for rsync -- http will
 156                 # support it natively and git native ones will do it on the
 157                 # remote end.  Not having that file is not a crime.
 158                 rsync -q "$repo/objects/info/alternates" \
 159                         "$D/.git/TMP_ALT" 2>/dev/null ||
 160                         rm -f "$D/.git/TMP_ALT"
 161                 if test -f "$D/.git/TMP_ALT"
 162                 then
 163                     ( cd $D &&
 164                       . git-parse-remote &&
 165                       resolve_alternates "$repo" <"./.git/TMP_ALT" ) |
 166                     while read alt
 167                     do
 168                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 169                         case "$quiet" in
 170                         '')     echo >&2 "Getting alternate: $alt" ;;
 171                         esac
 172                         rsync $quiet -av --ignore-existing  \
 173                             --exclude info "$alt" "$D/.git/objects" || exit
 174                     done
 175                     rm -f "$D/.git/TMP_ALT"
 176                 fi
 177                 ;;
 178         http://*)
 179                 clone_dumb_http "$repo" "$D"
 180                 ;;
 181         *)
 182                 cd "$D" && case "$upload_pack" in
 183                 '') git-clone-pack $quiet "$repo" ;;
 184                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 185                 esac
 186                 ;;
 187         esac
 188         ;;
 189 esac
 190
 191 cd $D || exit
 192
 193 if test -f ".git/HEAD"
 194 then
 195         mkdir -p .git/remotes || exit
 196         echo >.git/remotes/origin \
 197         "URL: $repo
 198 Pull: master:origin"
 199         case "$no_checkout" in
 200         '')
 201                 git checkout
 202         esac
 203 fi