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