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>] [--origin <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/$origin/$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,--reference) usage ;;
 125         *,--reference)
 126                 shift; reference="$1" ;;
 127         *,--reference=*)
 128                 reference=`expr "$1" : '--reference=\(.*\)'` ;;
 129         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 130                 case "$2" in
 131                 '')
 132                     usage ;;
 133                 */*)
 134                     echo >&2 "'$2' is not suitable for an origin name"
 135                     exit 1
 136                 esac
 137                 git-check-ref-format "heads/$2" || {
 138                     echo >&2 "'$2' is not suitable for a branch name"
 139                     exit 1
 140                 }
 141                 test -z "$origin_override" || {
 142                     echo >&2 "Do not give more than one --origin options."
 143                     exit 1
 144                 }
 145                 origin_override=yes
 146                 origin="$2"; shift
 147                 ;;
 148         1,-u|1,--upload-pack) usage ;;
 149         *,-u|*,--upload-pack)
 150                 shift
 151                 upload_pack="--exec=$1" ;;
 152         *,-*) usage ;;
 153         *) break ;;
 154         esac
 155 do
 156         shift
 157 done
 158
 159 # --bare implies --no-checkout
 160 if test yes = "$bare"
 161 then
 162         if test yes = "$origin_override"
 163         then
 164                 echo >&2 '--bare and --origin $origin options are incompatible.'
 165                 exit 1
 166         fi
 167         if test t = "$use_separate_remote"
 168         then
 169                 echo >&2 '--bare and --use-separate-remote options are incompatible.'
 170                 exit 1
 171         fi
 172         no_checkout=yes
 173 fi
 174
 175 if test -z "$origin"
 176 then
 177         origin=origin
 178 fi
 179
 180 # Turn the source into an absolute path if
 181 # it is local
 182 repo="$1"
 183 local=no
 184 if base=$(get_repo_base "$repo"); then
 185         repo="$base"
 186         local=yes
 187 fi
 188
 189 dir="$2"
 190 # Try using "humanish" part of source repo if user didn't specify one
 191 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 192 [ -e "$dir" ] && echo "$dir already exists." && usage
 193 mkdir -p "$dir" &&
 194 D=$(cd "$dir" && pwd) &&
 195 trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
 196 case "$bare" in
 197 yes) GIT_DIR="$D" ;;
 198 *) GIT_DIR="$D/.git" ;;
 199 esac && export GIT_DIR && git-init-db || usage
 200 case "$bare" in
 201 yes)
 202         GIT_DIR="$D" ;;
 203 *)
 204         GIT_DIR="$D/.git" ;;
 205 esac
 206
 207 if test -n "$reference"
 208 then
 209         if test -d "$reference"
 210         then
 211                 if test -d "$reference/.git/objects"
 212                 then
 213                         reference="$reference/.git"
 214                 fi
 215                 reference=$(cd "$reference" && pwd)
 216                 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 217                 (cd "$reference" && tar cf - refs) |
 218                 (cd "$GIT_DIR/refs" &&
 219                  mkdir reference-tmp &&
 220                  cd reference-tmp &&
 221                  tar xf -)
 222         else
 223                 echo >&2 "$reference: not a local directory." && usage
 224         fi
 225 fi
 226
 227 rm -f "$GIT_DIR/CLONE_HEAD"
 228
 229 # We do local magic only when the user tells us to.
 230 case "$local,$use_local" in
 231 yes,yes)
 232         ( cd "$repo/objects" ) || {
 233                 echo >&2 "-l flag seen but $repo is not local."
 234                 exit 1
 235         }
 236
 237         case "$local_shared" in
 238         no)
 239             # See if we can hardlink and drop "l" if not.
 240             sample_file=$(cd "$repo" && \
 241                           find objects -type f -print | sed -e 1q)
 242
 243             # objects directory should not be empty since we are cloning!
 244             test -f "$repo/$sample_file" || exit
 245
 246             l=
 247             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 248             then
 249                     l=l
 250             fi &&
 251             rm -f "$GIT_DIR/objects/sample" &&
 252             cd "$repo" &&
 253             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 254             ;;
 255         yes)
 256             mkdir -p "$GIT_DIR/objects/info"
 257             {
 258                 test -f "$repo/objects/info/alternates" &&
 259                 cat "$repo/objects/info/alternates";
 260                 echo "$repo/objects"
 261             } >"$GIT_DIR/objects/info/alternates"
 262             ;;
 263         esac
 264         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
 265         ;;
 266 *)
 267         case "$repo" in
 268         rsync://*)
 269                 rsync $quiet -av --ignore-existing  \
 270                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 271                 exit
 272                 # Look at objects/info/alternates for rsync -- http will
 273                 # support it natively and git native ones will do it on the
 274                 # remote end.  Not having that file is not a crime.
 275                 rsync -q "$repo/objects/info/alternates" \
 276                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 277                         rm -f "$GIT_DIR/TMP_ALT"
 278                 if test -f "$GIT_DIR/TMP_ALT"
 279                 then
 280                     ( cd "$D" &&
 281                       . git-parse-remote &&
 282                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 283                     while read alt
 284                     do
 285                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 286                         case "$quiet" in
 287                         '')     echo >&2 "Getting alternate: $alt" ;;
 288                         esac
 289                         rsync $quiet -av --ignore-existing  \
 290                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 291                     done
 292                     rm -f "$GIT_DIR/TMP_ALT"
 293                 fi
 294                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
 295                 ;;
 296         http://*)
 297                 if test -z "@@NO_CURL@@"
 298                 then
 299                         clone_dumb_http "$repo" "$D"
 300                 else
 301                         echo >&2 "http transport not supported, rebuild Git with curl support"
 302                         exit 1
 303                 fi
 304                 ;;
 305         *)
 306                 cd "$D" && case "$upload_pack" in
 307                 '') git-fetch-pack --all -k $quiet "$repo" ;;
 308                 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
 309                 esac >"$GIT_DIR/CLONE_HEAD" || {
 310                         echo >&2 "fetch-pack from '$repo' failed."
 311                         exit 1
 312                 }
 313                 ;;
 314         esac
 315         ;;
 316 esac
 317 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 318
 319 if test -f "$GIT_DIR/CLONE_HEAD"
 320 then
 321         # Figure out where the remote HEAD points at.
 322         perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
 323 fi
 324
 325 cd "$D" || exit
 326
 327 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 328 then
 329         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 330         # Figure out which remote branch HEAD points at.
 331         case "$use_separate_remote" in
 332         '')     remote_top=refs/heads ;;
 333         *)      remote_top="refs/remotes/$origin" ;;
 334         esac
 335
 336         # What to use to track the remote primary branch
 337         if test -n "$use_separate_remote"
 338         then
 339                 origin_tracking="remotes/$origin/master"
 340         else
 341                 origin_tracking="heads/$origin"
 342         fi
 343
 344         # The name under $remote_top the remote HEAD seems to point at
 345         head_points_at=$(
 346                 (
 347                         echo "master"
 348                         cd "$GIT_DIR/$remote_top" &&
 349                         find . -type f -print | sed -e 's/^\.\///'
 350                 ) | (
 351                 done=f
 352                 while read name
 353                 do
 354                         test t = $done && continue
 355                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 356                         if test "$head_sha1" = "$branch_tip"
 357                         then
 358                                 echo "$name"
 359                                 done=t
 360                         fi
 361                 done
 362                 )
 363         )
 364
 365         # Write out remotes/$origin file.
 366         case "$head_points_at" in
 367         ?*)
 368                 mkdir -p "$GIT_DIR/remotes" &&
 369                 echo >"$GIT_DIR/remotes/$origin" \
 370                 "URL: $repo
 371 Pull: refs/heads/$head_points_at:refs/$origin_tracking" &&
 372                 case "$use_separate_remote" in
 373                 t) git-update-ref HEAD "$head_sha1" ;;
 374                 *) git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) ;;
 375                 esac &&
 376                 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
 377                 while read dotslref
 378                 do
 379                         name=`expr "$dotslref" : './\(.*\)'` &&
 380                         test "$head_points_at" = "$name" ||
 381                         test "$origin" = "$name" ||
 382                         echo "Pull: refs/heads/${name}:$remote_top/${name}"
 383                 done >>"$GIT_DIR/remotes/$origin" &&
 384                 case "$use_separate_remote" in
 385                 t)
 386                         rm -f "refs/remotes/$origin/HEAD"
 387                         git-symbolic-ref "refs/remotes/$origin/HEAD" \
 388                                 "refs/remotes/$origin/$head_points_at"
 389                 esac
 390         esac
 391
 392         case "$no_checkout" in
 393         '')
 394                 git-read-tree -m -u -v HEAD HEAD
 395         esac
 396 fi
 397 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 398
 399 trap - exit
 400