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                 case "$name" in
  57                 *^*)    ;;
  58                 *)
  59                         git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
  60                 esac
  61         done <"$clone_tmp/refs"
  62         rm -fr "$clone_tmp"
  63 }
  64
  65 quiet=
  66 use_local=no
  67 local_shared=no
  68 no_checkout=
  69 upload_pack=
  70 while
  71         case "$#,$1" in
  72         0,*) break ;;
  73         *,-n) no_checkout=yes ;;
  74         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  75         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  76           local_shared=yes ;;
  77         *,-q|*,--quiet) quiet=-q ;;
  78         1,-u|1,--upload-pack) usage ;;
  79         *,-u|*,--upload-pack)
  80                 shift
  81                 upload_pack="--exec=$1" ;;
  82         *,-*) usage ;;
  83         *) break ;;
  84         esac
  85 do
  86         shift
  87 done
  88
  89 # Turn the source into an absolute path if
  90 # it is local
  91 repo="$1"
  92 local=no
  93 if base=$(get_repo_base "$repo"); then
  94         repo="$base"
  95         local=yes
  96 fi
  97
  98 dir="$2"
  99 mkdir "$dir" &&
 100 D=$(
 101         (cd "$dir" && git-init-db && pwd)
 102 ) &&
 103 test -d "$D" || usage
 104
 105 # We do local magic only when the user tells us to.
 106 case "$local,$use_local" in
 107 yes,yes)
 108         ( cd "$repo/objects" ) || {
 109                 echo >&2 "-l flag seen but $repo is not local."
 110                 exit 1
 111         }
 112
 113         case "$local_shared" in
 114         no)
 115             # See if we can hardlink and drop "l" if not.
 116             sample_file=$(cd "$repo" && \
 117                           find objects -type f -print | sed -e 1q)
 118
 119             # objects directory should not be empty since we are cloning!
 120             test -f "$repo/$sample_file" || exit
 121
 122             l=
 123             if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
 124             then
 125                     l=l
 126             fi &&
 127             rm -f "$D/.git/objects/sample" &&
 128             cd "$repo" &&
 129             find objects -type f -print |
 130             cpio -puamd$l "$D/.git/" || exit 1
 131             ;;
 132         yes)
 133             mkdir -p "$D/.git/objects/info"
 134             {
 135                 test -f "$repo/objects/info/alternates" &&
 136                 cat "$repo/objects/info/alternates";
 137                 echo "$repo/objects"
 138             } >"$D/.git/objects/info/alternates"
 139             ;;
 140         esac
 141
 142         # Make a duplicate of refs and HEAD pointer
 143         HEAD=
 144         if test -f "$repo/HEAD"
 145         then
 146                 HEAD=HEAD
 147         fi
 148         (cd "$repo" && tar cf - refs $HEAD) |
 149         (cd "$D/.git" && tar xf -) || exit 1
 150         ;;
 151 *)
 152         case "$repo" in
 153         rsync://*)
 154                 rsync $quiet -av --ignore-existing  \
 155                         --exclude info "$repo/objects/" "$D/.git/objects/" &&
 156                 rsync $quiet -av --ignore-existing  \
 157                         --exclude info "$repo/refs/" "$D/.git/refs/" || exit
 158
 159                 # Look at objects/info/alternates for rsync -- http will
 160                 # support it natively and git native ones will do it on the
 161                 # remote end.  Not having that file is not a crime.
 162                 rsync -q "$repo/objects/info/alternates" \
 163                         "$D/.git/TMP_ALT" 2>/dev/null ||
 164                         rm -f "$D/.git/TMP_ALT"
 165                 if test -f "$D/.git/TMP_ALT"
 166                 then
 167                     ( cd $D &&
 168                       . git-parse-remote &&
 169                       resolve_alternates "$repo" <"./.git/TMP_ALT" ) |
 170                     while read alt
 171                     do
 172                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 173                         case "$quiet" in
 174                         '')     echo >&2 "Getting alternate: $alt" ;;
 175                         esac
 176                         rsync $quiet -av --ignore-existing  \
 177                             --exclude info "$alt" "$D/.git/objects" || exit
 178                     done
 179                     rm -f "$D/.git/TMP_ALT"
 180                 fi
 181                 ;;
 182         http://*)
 183                 clone_dumb_http "$repo" "$D"
 184                 ;;
 185         *)
 186                 cd "$D" && case "$upload_pack" in
 187                 '') git-clone-pack $quiet "$repo" ;;
 188                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 189                 esac
 190                 ;;
 191         esac
 192         ;;
 193 esac
 194
 195 cd $D || exit
 196
 197 if test -f ".git/HEAD"
 198 then
 199         head_points_at=`git-symbolic-ref HEAD`
 200         case "$head_points_at" in
 201         refs/heads/*)
 202                 head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
 203                 mkdir -p .git/remotes &&
 204                 echo >.git/remotes/origin \
 205                 "URL: $repo
 206 Pull: $head_points_at:origin"
 207                 cp ".git/refs/heads/$head_points_at" .git/refs/heads/origin
 208         esac
 209
 210         case "$no_checkout" in
 211         '')
 212                 git checkout
 213         esac
 214 fi