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 [--use-separate-remote] [--reference <reference-repo>] [--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 "$name" in
  43                 *^*)    continue;;
  44                 esac
  45                 if test -n "$use_separate_remote" &&
  46                    branch_name=`expr "$name" : 'heads/\(.*\)'`
  47                 then
  48                         tname="remotes/$branch_name"
  49                 else
  50                         tname=$name
  51                 fi
  52                 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
  53         done <"$clone_tmp/refs"
  54         rm -fr "$clone_tmp"
  55         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD"
  56 }
  57
  58 # Read git-fetch-pack -k output and store the remote branches.
  59 copy_refs='
  60 use File::Path qw(mkpath);
  61 use File::Basename qw(dirname);
  62 my $git_dir = $ARGV[0];
  63 my $use_separate_remote = $ARGV[1];
  64 my $origin = $ARGV[2];
  65
  66 my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
  67 my $tag_top = "tags";
  68
  69 sub store {
  70         my ($sha1, $name, $top) = @_;
  71         $name = "$git_dir/refs/$top/$name";
  72         mkpath(dirname($name));
  73         open O, ">", "$name";
  74         print O "$sha1\n";
  75         close O;
  76 }
  77
  78 open FH, "<", "$git_dir/CLONE_HEAD";
  79 while (<FH>) {
  80         my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
  81         next if ($name =~ /\^\173/);
  82         if ($name eq "HEAD") {
  83                 open O, ">", "$git_dir/REMOTE_HEAD";
  84                 print O "$sha1\n";
  85                 close O;
  86                 next;
  87         }
  88         if ($name =~ s/^refs\/heads\///) {
  89                 store($sha1, $name, $branch_top);
  90                 next;
  91         }
  92         if ($name =~ s/^refs\/tags\///) {
  93                 store($sha1, $name, $tag_top);
  94                 next;
  95         }
  96 }
  97 close FH;
  98 '
  99
 100 quiet=
 101 use_local=no
 102 local_shared=no
 103 no_checkout=
 104 upload_pack=
 105 bare=
 106 reference=
 107 origin=
 108 origin_override=
 109 use_separate_remote=
 110 while
 111         case "$#,$1" in
 112         0,*) break ;;
 113         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 114         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 115           no_checkout=yes ;;
 116         *,--na|*,--nak|*,--nake|*,--naked|\
 117         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 118         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
 119         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 120           local_shared=yes; use_local=yes ;;
 121         *,-q|*,--quiet) quiet=-q ;;
 122         *,--use-separate-remote)
 123                 use_separate_remote=t ;;
 124         1,-o) usage;;
 125         1,--reference) usage ;;
 126         *,--reference)
 127                 shift; reference="$1" ;;
 128         *,--reference=*)
 129                 reference=`expr "$1" : '--reference=\(.*\)'` ;;
 130         *,-o)
 131                 case "$2" in
 132                 */*)
 133                     echo >&2 "'$2' is not suitable for an origin name"
 134                     exit 1
 135                 esac
 136                 git-check-ref-format "heads/$2" || {
 137                     echo >&2 "'$2' is not suitable for a branch name"
 138                     exit 1
 139                 }
 140                 test -z "$origin_override" || {
 141                     echo >&2 "Do not give more than one -o options."
 142                     exit 1
 143                 }
 144                 origin_override=yes
 145                 origin="$2"; shift
 146                 ;;
 147         1,-u|1,--upload-pack) usage ;;
 148         *,-u|*,--upload-pack)
 149                 shift
 150                 upload_pack="--exec=$1" ;;
 151         *,-*) usage ;;
 152         *) break ;;
 153         esac
 154 do
 155         shift
 156 done
 157
 158 # --bare implies --no-checkout
 159 if test yes = "$bare"
 160 then
 161         if test yes = "$origin_override"
 162         then
 163                 echo >&2 '--bare and -o $origin options are incompatible.'
 164                 exit 1
 165         fi
 166         if test t = "$use_separate_remote"
 167         then
 168                 echo >&2 '--bare and --use-separate-remote options are incompatible.'
 169                 exit 1
 170         fi
 171         no_checkout=yes
 172 fi
 173
 174 if test -z "$origin"
 175 then
 176         origin=origin
 177 fi
 178
 179 # Turn the source into an absolute path if
 180 # it is local
 181 repo="$1"
 182 local=no
 183 if base=$(get_repo_base "$repo"); then
 184         repo="$base"
 185         local=yes
 186 fi
 187
 188 dir="$2"
 189 # Try using "humanish" part of source repo if user didn't specify one
 190 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 191 [ -e "$dir" ] && echo "$dir already exists." && usage
 192 mkdir -p "$dir" &&
 193 D=$(cd "$dir" && pwd) &&
 194 trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
 195 case "$bare" in
 196 yes) GIT_DIR="$D" ;;
 197 *) GIT_DIR="$D/.git" ;;
 198 esac && export GIT_DIR && git-init-db || usage
 199 case "$bare" in
 200 yes)
 201         GIT_DIR="$D" ;;
 202 *)
 203         GIT_DIR="$D/.git" ;;
 204 esac
 205
 206 if test -n "$reference"
 207 then
 208         if test -d "$reference"
 209         then
 210                 if test -d "$reference/.git/objects"
 211                 then
 212                         reference="$reference/.git"
 213                 fi
 214                 reference=$(cd "$reference" && pwd)
 215                 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 216                 (cd "$reference" && tar cf - refs) |
 217                 (cd "$GIT_DIR/refs" &&
 218                  mkdir reference-tmp &&
 219                  cd reference-tmp &&
 220                  tar xf -)
 221         else
 222                 echo >&2 "$reference: not a local directory." && usage
 223         fi
 224 fi
 225
 226 rm -f "$GIT_DIR/CLONE_HEAD"
 227
 228 # We do local magic only when the user tells us to.
 229 case "$local,$use_local" in
 230 yes,yes)
 231         ( cd "$repo/objects" ) || {
 232                 echo >&2 "-l flag seen but $repo is not local."
 233                 exit 1
 234         }
 235
 236         case "$local_shared" in
 237         no)
 238             # See if we can hardlink and drop "l" if not.
 239             sample_file=$(cd "$repo" && \
 240                           find objects -type f -print | sed -e 1q)
 241
 242             # objects directory should not be empty since we are cloning!
 243             test -f "$repo/$sample_file" || exit
 244
 245             l=
 246             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 247             then
 248                     l=l
 249             fi &&
 250             rm -f "$GIT_DIR/objects/sample" &&
 251             cd "$repo" &&
 252             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 253             ;;
 254         yes)
 255             mkdir -p "$GIT_DIR/objects/info"
 256             {
 257                 test -f "$repo/objects/info/alternates" &&
 258                 cat "$repo/objects/info/alternates";
 259                 echo "$repo/objects"
 260             } >"$GIT_DIR/objects/info/alternates"
 261             ;;
 262         esac
 263         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
 264         ;;
 265 *)
 266         case "$repo" in
 267         rsync://*)
 268                 rsync $quiet -av --ignore-existing  \
 269                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 270                 exit
 271                 # Look at objects/info/alternates for rsync -- http will
 272                 # support it natively and git native ones will do it on the
 273                 # remote end.  Not having that file is not a crime.
 274                 rsync -q "$repo/objects/info/alternates" \
 275                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 276                         rm -f "$GIT_DIR/TMP_ALT"
 277                 if test -f "$GIT_DIR/TMP_ALT"
 278                 then
 279                     ( cd "$D" &&
 280                       . git-parse-remote &&
 281                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 282                     while read alt
 283                     do
 284                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 285                         case "$quiet" in
 286                         '')     echo >&2 "Getting alternate: $alt" ;;
 287                         esac
 288                         rsync $quiet -av --ignore-existing  \
 289                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 290                     done
 291                     rm -f "$GIT_DIR/TMP_ALT"
 292                 fi
 293                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
 294                 ;;
 295         http://*)
 296                 if test -z "@@NO_CURL@@"
 297                 then
 298                         clone_dumb_http "$repo" "$D"
 299                 else
 300                         echo >&2 "http transport not supported, rebuild Git with curl support"
 301                         exit 1
 302                 fi
 303                 ;;
 304         *)
 305                 cd "$D" && case "$upload_pack" in
 306                 '') git-fetch-pack --all -k $quiet "$repo" ;;
 307                 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
 308                 esac >"$GIT_DIR/CLONE_HEAD" || {
 309                         echo >&2 "fetch-pack from '$repo' failed."
 310                         exit 1
 311                 }
 312                 ;;
 313         esac
 314         ;;
 315 esac
 316 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 317
 318 if test -f "$GIT_DIR/CLONE_HEAD"
 319 then
 320         # Figure out where the remote HEAD points at.
 321         perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
 322 fi
 323
 324 cd "$D" || exit
 325
 326 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 327 then
 328         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 329         # Figure out which remote branch HEAD points at.
 330         case "$use_separate_remote" in
 331         '')     remote_top=refs/heads ;;
 332         *)      remote_top="refs/remotes/$origin" ;;
 333         esac
 334
 335         # What to use to track the remote primary branch
 336         if test -n "$use_separate_remote"
 337         then
 338                 origin_tracking="remotes/$origin/master"
 339         else
 340                 origin_tracking="heads/$origin"
 341         fi
 342
 343         # The name under $remote_top the remote HEAD seems to point at
 344         head_points_at=$(
 345                 (
 346                         echo "master"
 347                         cd "$GIT_DIR/$remote_top" &&
 348                         find . -type f -print | sed -e 's/^\.\///'
 349                 ) | (
 350                 done=f
 351                 while read name
 352                 do
 353                         test t = $done && continue
 354                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 355                         if test "$head_sha1" = "$branch_tip"
 356                         then
 357                                 echo "$name"
 358                                 done=t
 359                         fi
 360                 done
 361                 )
 362         )
 363
 364         # Write out remotes/$origin file.
 365         case "$head_points_at" in
 366         ?*)
 367                 mkdir -p "$GIT_DIR/remotes" &&
 368                 echo >"$GIT_DIR/remotes/$origin" \
 369                 "URL: $repo
 370 Pull: refs/heads/$head_points_at:refs/$origin_tracking" &&
 371                 case "$use_separate_remote" in
 372                 t) git-update-ref HEAD "$head_sha1" ;;
 373                 *) git-update-ref "refs/$origin" $(git-rev-parse HEAD)
 374                 esac &&
 375                 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
 376                 while read dotslref
 377                 do
 378                         name=`expr "$dotslref" : './\(.*\)'` &&
 379                         test "$head_points_at" = "$name" ||
 380                         test "$origin" = "$head" ||
 381                         echo "Pull: refs/heads/${name}:$remote_top/${name}"
 382                 done >>"$GIT_DIR/remotes/$origin"
 383         esac
 384
 385         case "$no_checkout" in
 386         '')
 387                 git-read-tree -m -u -v HEAD HEAD
 388         esac
 389 fi
 390 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 391
 392 trap - exit
 393