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 "Usage: $0 [-l [-s]] [-q] [-u <upload-pack>] [-o <name>] [-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 -nsfL $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                 echo >&2 "Cannot get remote repository information.
  36 Perhaps git-update-server-info needs to be run there?"
  37                 exit 1;
  38         }
  39         while read sha1 refname
  40         do
  41                 name=`expr "$refname" : 'refs/\(.*\)'` &&
  42                 case "$name" in
  43                 *^*)    ;;
  44                 *)
  45                         git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
  46                 esac
  47         done <"$clone_tmp/refs"
  48         rm -fr "$clone_tmp"
  49 }
  50
  51 quiet=
  52 use_local=no
  53 local_shared=no
  54 no_checkout=
  55 upload_pack=
  56 origin=origin
  57 while
  58         case "$#,$1" in
  59         0,*) break ;;
  60         *,-n) no_checkout=yes ;;
  61         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  62         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  63           local_shared=yes; use_local=yes ;;
  64         *,-q|*,--quiet) quiet=-q ;;
  65         1,-o) usage;;
  66         *,-o)
  67                 git-check-ref-format "$2" || {
  68                     echo >&2 "'$2' is not suitable for a branch name"
  69                     exit 1
  70                 }
  71                 origin="$2"; shift
  72                 ;;
  73         1,-u|1,--upload-pack) usage ;;
  74         *,-u|*,--upload-pack)
  75                 shift
  76                 upload_pack="--exec=$1" ;;
  77         *,-*) usage ;;
  78         *) break ;;
  79         esac
  80 do
  81         shift
  82 done
  83
  84 # Turn the source into an absolute path if
  85 # it is local
  86 repo="$1"
  87 local=no
  88 if base=$(get_repo_base "$repo"); then
  89         repo="$base"
  90         local=yes
  91 fi
  92
  93 dir="$2"
  94 # Try using "humanish" part of source repo if user didn't specify one
  95 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*/||g')
  96 [ -e "$dir" ] && echo "$dir already exists." && usage
  97 mkdir -p "$dir" &&
  98 D=$(
  99         (cd "$dir" && git-init-db && pwd)
 100 ) &&
 101 test -d "$D" || usage
 102
 103 # We do local magic only when the user tells us to.
 104 case "$local,$use_local" in
 105 yes,yes)
 106         ( cd "$repo/objects" ) || {
 107                 echo >&2 "-l flag seen but $repo is not local."
 108                 exit 1
 109         }
 110
 111         case "$local_shared" in
 112         no)
 113             # See if we can hardlink and drop "l" if not.
 114             sample_file=$(cd "$repo" && \
 115                           find objects -type f -print | sed -e 1q)
 116
 117             # objects directory should not be empty since we are cloning!
 118             test -f "$repo/$sample_file" || exit
 119
 120             l=
 121             if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
 122             then
 123                     l=l
 124             fi &&
 125             rm -f "$D/.git/objects/sample" &&
 126             cd "$repo" &&
 127             find objects -depth -print | cpio -puamd$l "$D/.git/" || exit 1
 128             ;;
 129         yes)
 130             mkdir -p "$D/.git/objects/info"
 131             {
 132                 test -f "$repo/objects/info/alternates" &&
 133                 cat "$repo/objects/info/alternates";
 134                 echo "$repo/objects"
 135             } >"$D/.git/objects/info/alternates"
 136             ;;
 137         esac
 138
 139         # Make a duplicate of refs and HEAD pointer
 140         HEAD=
 141         if test -f "$repo/HEAD"
 142         then
 143                 HEAD=HEAD
 144         fi
 145         (cd "$repo" && tar cf - refs $HEAD) |
 146         (cd "$D/.git" && tar xf -) || exit 1
 147         ;;
 148 *)
 149         case "$repo" in
 150         rsync://*)
 151                 rsync $quiet -av --ignore-existing  \
 152                         --exclude info "$repo/objects/" "$D/.git/objects/" &&
 153                 rsync $quiet -av --ignore-existing  \
 154                         --exclude info "$repo/refs/" "$D/.git/refs/" || exit
 155
 156                 # Look at objects/info/alternates for rsync -- http will
 157                 # support it natively and git native ones will do it on the
 158                 # remote end.  Not having that file is not a crime.
 159                 rsync -q "$repo/objects/info/alternates" \
 160                         "$D/.git/TMP_ALT" 2>/dev/null ||
 161                         rm -f "$D/.git/TMP_ALT"
 162                 if test -f "$D/.git/TMP_ALT"
 163                 then
 164                     ( cd "$D" &&
 165                       . git-parse-remote &&
 166                       resolve_alternates "$repo" <"./.git/TMP_ALT" ) |
 167                     while read alt
 168                     do
 169                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 170                         case "$quiet" in
 171                         '')     echo >&2 "Getting alternate: $alt" ;;
 172                         esac
 173                         rsync $quiet -av --ignore-existing  \
 174                             --exclude info "$alt" "$D/.git/objects" || exit
 175                     done
 176                     rm -f "$D/.git/TMP_ALT"
 177                 fi
 178                 ;;
 179         http://*)
 180                 clone_dumb_http "$repo" "$D"
 181                 ;;
 182         *)
 183                 cd "$D" && case "$upload_pack" in
 184                 '') git-clone-pack $quiet "$repo" ;;
 185                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 186                 esac || {
 187                         echo >&2 "clone-pack from '$repo' failed."
 188                         exit 1
 189                 }
 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                 git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) &&
 208                 find .git/refs/heads -type f -print |
 209                 while read ref
 210                 do
 211                         head=`expr "$ref" : '.git/refs/heads/\(.*\)'` &&
 212                         test "$head_points_at" = "$head" ||
 213                         test "$origin" = "$head" ||
 214                         echo "Pull: ${head}:${head}"
 215                 done >>.git/remotes/origin
 216         esac
 217
 218         case "$no_checkout" in
 219         '')
 220                 git checkout
 221         esac
 222 fi