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 [--bare] [-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 "$clone_tmp"
  49 }
  50
  51 quiet=
  52 use_local=no
  53 local_shared=no
  54 no_checkout=
  55 upload_pack=
  56 bare=
  57 origin=origin
  58 origin_override=
  59 while
  60         case "$#,$1" in
  61         0,*) break ;;
  62         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
  63         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
  64           no_checkout=yes ;;
  65         *,--na|*,--nak|*,--nake|*,--naked|\
  66         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
  67         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  68         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  69           local_shared=yes; use_local=yes ;;
  70         *,-q|*,--quiet) quiet=-q ;;
  71         1,-o) usage;;
  72         *,-o)
  73                 git-check-ref-format "$2" || {
  74                     echo >&2 "'$2' is not suitable for a branch name"
  75                     exit 1
  76                 }
  77                 test -z "$origin_override" || {
  78                     echo >&2 "Do not give more than one -o options."
  79                     exit 1
  80                 }
  81                 origin_override=yes
  82                 origin="$2"; shift
  83                 ;;
  84         1,-u|1,--upload-pack) usage ;;
  85         *,-u|*,--upload-pack)
  86                 shift
  87                 upload_pack="--exec=$1" ;;
  88         *,-*) usage ;;
  89         *) break ;;
  90         esac
  91 do
  92         shift
  93 done
  94
  95 # --bare implies --no-checkout
  96 if test yes = "$bare"
  97 then
  98         if test yes = "$origin_override"
  99         then
 100                 echo >&2 '--bare and -o $origin options are incompatible.'
 101                 exit 1
 102         fi
 103         no_checkout=yes
 104 fi
 105
 106 # Turn the source into an absolute path if
 107 # it is local
 108 repo="$1"
 109 local=no
 110 if base=$(get_repo_base "$repo"); then
 111         repo="$base"
 112         local=yes
 113 fi
 114
 115 dir="$2"
 116 # Try using "humanish" part of source repo if user didn't specify one
 117 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 118 [ -e "$dir" ] && echo "$dir already exists." && usage
 119 mkdir -p "$dir" &&
 120 D=$(cd "$dir" && pwd) &&
 121 trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
 122 case "$bare" in
 123 yes) GIT_DIR="$D" ;;
 124 *) GIT_DIR="$D/.git" ;;
 125 esac && export GIT_DIR && git-init-db || usage
 126 case "$bare" in
 127 yes)
 128         GIT_DIR="$D" ;;
 129 *)
 130         GIT_DIR="$D/.git" ;;
 131 esac
 132
 133 # We do local magic only when the user tells us to.
 134 case "$local,$use_local" in
 135 yes,yes)
 136         ( cd "$repo/objects" ) || {
 137                 echo >&2 "-l flag seen but $repo is not local."
 138                 exit 1
 139         }
 140
 141         case "$local_shared" in
 142         no)
 143             # See if we can hardlink and drop "l" if not.
 144             sample_file=$(cd "$repo" && \
 145                           find objects -type f -print | sed -e 1q)
 146
 147             # objects directory should not be empty since we are cloning!
 148             test -f "$repo/$sample_file" || exit
 149
 150             l=
 151             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 152             then
 153                     l=l
 154             fi &&
 155             rm -f "$GIT_DIR/objects/sample" &&
 156             cd "$repo" &&
 157             find objects -depth -print | cpio -puamd$l "$GIT_DIR/" || exit 1
 158             ;;
 159         yes)
 160             mkdir -p "$GIT_DIR/objects/info"
 161             {
 162                 test -f "$repo/objects/info/alternates" &&
 163                 cat "$repo/objects/info/alternates";
 164                 echo "$repo/objects"
 165             } >"$GIT_DIR/objects/info/alternates"
 166             ;;
 167         esac
 168
 169         # Make a duplicate of refs and HEAD pointer
 170         HEAD=
 171         if test -f "$repo/HEAD"
 172         then
 173                 HEAD=HEAD
 174         fi
 175         (cd "$repo" && tar cf - refs $HEAD) |
 176         (cd "$GIT_DIR" && tar xf -) || exit 1
 177         ;;
 178 *)
 179         case "$repo" in
 180         rsync://*)
 181                 rsync $quiet -av --ignore-existing  \
 182                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" &&
 183                 rsync $quiet -av --ignore-existing  \
 184                         --exclude info "$repo/refs/" "$GIT_DIR/refs/" || exit
 185
 186                 # Look at objects/info/alternates for rsync -- http will
 187                 # support it natively and git native ones will do it on the
 188                 # remote end.  Not having that file is not a crime.
 189                 rsync -q "$repo/objects/info/alternates" \
 190                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 191                         rm -f "$GIT_DIR/TMP_ALT"
 192                 if test -f "$GIT_DIR/TMP_ALT"
 193                 then
 194                     ( cd "$D" &&
 195                       . git-parse-remote &&
 196                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 197                     while read alt
 198                     do
 199                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 200                         case "$quiet" in
 201                         '')     echo >&2 "Getting alternate: $alt" ;;
 202                         esac
 203                         rsync $quiet -av --ignore-existing  \
 204                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 205                     done
 206                     rm -f "$GIT_DIR/TMP_ALT"
 207                 fi
 208                 ;;
 209         http://*)
 210                 if test -z "@@NO_CURL@@"
 211                 then
 212                         clone_dumb_http "$repo" "$D"
 213                 else
 214                         echo >&2 "http transport not supported, rebuild Git with curl support"
 215                         exit 1
 216                 fi
 217                 ;;
 218         *)
 219                 cd "$D" && case "$upload_pack" in
 220                 '') git-clone-pack $quiet "$repo" ;;
 221                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 222                 esac || {
 223                         echo >&2 "clone-pack from '$repo' failed."
 224                         exit 1
 225                 }
 226                 ;;
 227         esac
 228         ;;
 229 esac
 230
 231 cd "$D" || exit
 232
 233 if test -f "$GIT_DIR/HEAD" && test -z "$bare"
 234 then
 235         head_points_at=`git-symbolic-ref HEAD`
 236         case "$head_points_at" in
 237         refs/heads/*)
 238                 head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
 239                 mkdir -p "$GIT_DIR/remotes" &&
 240                 echo >"$GIT_DIR/remotes/origin" \
 241                 "URL: $repo
 242 Pull: $head_points_at:$origin" &&
 243                 git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) &&
 244                 (cd "$GIT_DIR" && find "refs/heads" -type f -print) |
 245                 while read ref
 246                 do
 247                         head=`expr "$ref" : 'refs/heads/\(.*\)'` &&
 248                         test "$head_points_at" = "$head" ||
 249                         test "$origin" = "$head" ||
 250                         echo "Pull: ${head}:${head}"
 251                 done >>"$GIT_DIR/remotes/origin"
 252         esac
 253
 254         case "$no_checkout" in
 255         '')
 256                 git checkout
 257         esac
 258 fi
 259
 260 trap - exit
 261