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 die() {
  12         echo >&2 "$@"
  13         exit 1
  14 }
  15
  16 usage() {
  17         die "Usage: $0 [--template=<template_directory>] [--use-immingled-remote] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [--depth <n>] [-n] <repo> [<dir>]"
  18 }
  19
  20 get_repo_base() {
  21         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  22 }
  23
  24 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  25     curl_extra_args="-k"
  26 fi
  27
  28 http_fetch () {
  29         # $1 = Remote, $2 = Local
  30         curl -nsfL $curl_extra_args "$1" >"$2"
  31 }
  32
  33 clone_dumb_http () {
  34         # $1 - remote, $2 - local
  35         cd "$2" &&
  36         clone_tmp="$GIT_DIR/clone-tmp" &&
  37         mkdir -p "$clone_tmp" || exit 1
  38         if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
  39                 "`git-repo-config --bool http.noEPSV`" = true ]; then
  40                 curl_extra_args="${curl_extra_args} --disable-epsv"
  41         fi
  42         http_fetch "$1/info/refs" "$clone_tmp/refs" ||
  43                 die "Cannot get remote repository information.
  44 Perhaps git-update-server-info needs to be run there?"
  45         while read sha1 refname
  46         do
  47                 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  48                 case "$name" in
  49                 *^*)    continue;;
  50                 esac
  51                 if test -n "$use_separate_remote" &&
  52                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  53                 then
  54                         tname="remotes/$origin/$branch_name"
  55                 else
  56                         tname=$name
  57                 fi
  58                 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
  59         done <"$clone_tmp/refs"
  60         rm -fr "$clone_tmp"
  61         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  62         rm -f "$GIT_DIR/REMOTE_HEAD"
  63 }
  64
  65 # Read git-fetch-pack -k output and store the remote branches.
  66 copy_refs='
  67 use File::Path qw(mkpath);
  68 use File::Basename qw(dirname);
  69 my $git_dir = $ARGV[0];
  70 my $use_separate_remote = $ARGV[1];
  71 my $origin = $ARGV[2];
  72
  73 my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
  74 my $tag_top = "tags";
  75
  76 sub store {
  77         my ($sha1, $name, $top) = @_;
  78         $name = "$git_dir/refs/$top/$name";
  79         mkpath(dirname($name));
  80         open O, ">", "$name";
  81         print O "$sha1\n";
  82         close O;
  83 }
  84
  85 open FH, "<", "$git_dir/CLONE_HEAD";
  86 while (<FH>) {
  87         my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
  88         next if ($name =~ /\^\173/);
  89         if ($name eq "HEAD") {
  90                 open O, ">", "$git_dir/REMOTE_HEAD";
  91                 print O "$sha1\n";
  92                 close O;
  93                 next;
  94         }
  95         if ($name =~ s/^refs\/heads\///) {
  96                 store($sha1, $name, $branch_top);
  97                 next;
  98         }
  99         if ($name =~ s/^refs\/tags\///) {
 100                 store($sha1, $name, $tag_top);
 101                 next;
 102         }
 103 }
 104 close FH;
 105 '
 106
 107 quiet=
 108 local=no
 109 use_local=no
 110 local_shared=no
 111 unset template
 112 no_checkout=
 113 upload_pack=
 114 bare=
 115 reference=
 116 origin=
 117 origin_override=
 118 use_separate_remote=t
 119 depth=
 120 while
 121         case "$#,$1" in
 122         0,*) break ;;
 123         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 124         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 125           no_checkout=yes ;;
 126         *,--na|*,--nak|*,--nake|*,--naked|\
 127         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 128         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
 129         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 130           local_shared=yes; use_local=yes ;;
 131         1,--template) usage ;;
 132         *,--template)
 133                 shift; template="--template=$1" ;;
 134         *,--template=*)
 135           template="$1" ;;
 136         *,-q|*,--quiet) quiet=-q ;;
 137         *,--use-separate-remote)
 138                 # default
 139                 use_separate_remote=t ;;
 140         *,--use-immingled-remote)
 141                 use_separate_remote= ;;
 142         1,--reference) usage ;;
 143         *,--reference)
 144                 shift; reference="$1" ;;
 145         *,--reference=*)
 146                 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 147         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 148                 case "$2" in
 149                 '')
 150                     usage ;;
 151                 */*)
 152                     die "'$2' is not suitable for an origin name"
 153                 esac
 154                 git-check-ref-format "heads/$2" ||
 155                     die "'$2' is not suitable for a branch name"
 156                 test -z "$origin_override" ||
 157                     die "Do not give more than one --origin options."
 158                 origin_override=yes
 159                 origin="$2"; shift
 160                 ;;
 161         1,-u|1,--upload-pack) usage ;;
 162         *,-u|*,--upload-pack)
 163                 shift
 164                 upload_pack="--exec=$1" ;;
 165         1,--depth) usage;;
 166         *,--depth)
 167                 shift
 168                 depth="--depth=$1";;
 169         *,-*) usage ;;
 170         *) break ;;
 171         esac
 172 do
 173         shift
 174 done
 175
 176 repo="$1"
 177 test -n "$repo" ||
 178     die 'you must specify a repository to clone.'
 179
 180 # --bare implies --no-checkout and --use-immingled-remote
 181 if test yes = "$bare"
 182 then
 183         if test yes = "$origin_override"
 184         then
 185                 die '--bare and --origin $origin options are incompatible.'
 186         fi
 187         no_checkout=yes
 188         use_separate_remote=
 189 fi
 190
 191 if test -z "$origin"
 192 then
 193         origin=origin
 194 fi
 195
 196 # Turn the source into an absolute path if
 197 # it is local
 198 if base=$(get_repo_base "$repo"); then
 199         repo="$base"
 200         local=yes
 201 fi
 202
 203 dir="$2"
 204 # Try using "humanish" part of source repo if user didn't specify one
 205 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 206 [ -e "$dir" ] && die "destination directory '$dir' already exists."
 207 mkdir -p "$dir" &&
 208 D=$(cd "$dir" && pwd) &&
 209 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 210 case "$bare" in
 211 yes)
 212         GIT_DIR="$D" ;;
 213 *)
 214         GIT_DIR="$D/.git" ;;
 215 esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
 216
 217 if test -n "$reference"
 218 then
 219         if test -d "$reference"
 220         then
 221                 if test -d "$reference/.git/objects"
 222                 then
 223                         reference="$reference/.git"
 224                 fi
 225                 reference=$(cd "$reference" && pwd)
 226                 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 227                 (cd "$reference" && tar cf - refs) |
 228                 (cd "$GIT_DIR/refs" &&
 229                  mkdir reference-tmp &&
 230                  cd reference-tmp &&
 231                  tar xf -)
 232         else
 233                 die "reference repository '$reference' is not a local directory."
 234         fi
 235 fi
 236
 237 rm -f "$GIT_DIR/CLONE_HEAD"
 238
 239 # We do local magic only when the user tells us to.
 240 case "$local,$use_local" in
 241 yes,yes)
 242         ( cd "$repo/objects" ) ||
 243                 die "-l flag seen but repository '$repo' is not local."
 244
 245         case "$local_shared" in
 246         no)
 247             # See if we can hardlink and drop "l" if not.
 248             sample_file=$(cd "$repo" && \
 249                           find objects -type f -print | sed -e 1q)
 250
 251             # objects directory should not be empty since we are cloning!
 252             test -f "$repo/$sample_file" || exit
 253
 254             l=
 255             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 256             then
 257                     l=l
 258             fi &&
 259             rm -f "$GIT_DIR/objects/sample" &&
 260             cd "$repo" &&
 261             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 262             ;;
 263         yes)
 264             mkdir -p "$GIT_DIR/objects/info"
 265             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 266             ;;
 267         esac
 268         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 269         ;;
 270 *)
 271         case "$repo" in
 272         rsync://*)
 273                 case "$depth" in
 274                 "") ;;
 275                 *) die "shallow over rsync not supported" ;;
 276                 esac
 277                 rsync $quiet -av --ignore-existing  \
 278                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 279                 exit
 280                 # Look at objects/info/alternates for rsync -- http will
 281                 # support it natively and git native ones will do it on the
 282                 # remote end.  Not having that file is not a crime.
 283                 rsync -q "$repo/objects/info/alternates" \
 284                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 285                         rm -f "$GIT_DIR/TMP_ALT"
 286                 if test -f "$GIT_DIR/TMP_ALT"
 287                 then
 288                     ( cd "$D" &&
 289                       . git-parse-remote &&
 290                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 291                     while read alt
 292                     do
 293                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 294                         case "$quiet" in
 295                         '')     echo >&2 "Getting alternate: $alt" ;;
 296                         esac
 297                         rsync $quiet -av --ignore-existing  \
 298                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 299                     done
 300                     rm -f "$GIT_DIR/TMP_ALT"
 301                 fi
 302                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 303                 ;;
 304         https://*|http://*|ftp://*)
 305                 case "$depth" in
 306                 "") ;;
 307                 *) die "shallow over http or ftp not supported" ;;
 308                 esac
 309                 if test -z "@@NO_CURL@@"
 310                 then
 311                         clone_dumb_http "$repo" "$D"
 312                 else
 313                         die "http transport not supported, rebuild Git with curl support"
 314                 fi
 315                 ;;
 316         *)
 317                 case "$upload_pack" in
 318                 '') git-fetch-pack --all -k $quiet $depth "$repo" ;;
 319                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
 320                 esac >"$GIT_DIR/CLONE_HEAD" ||
 321                         die "fetch-pack from '$repo' failed."
 322                 ;;
 323         esac
 324         ;;
 325 esac
 326 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 327
 328 if test -f "$GIT_DIR/CLONE_HEAD"
 329 then
 330         # Read git-fetch-pack -k output and store the remote branches.
 331         @@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
 332         exit
 333 fi
 334
 335 cd "$D" || exit
 336
 337 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 338 then
 339         # Figure out which remote branch HEAD points at.
 340         case "$use_separate_remote" in
 341         '')     remote_top=refs/heads ;;
 342         *)      remote_top="refs/remotes/$origin" ;;
 343         esac
 344
 345         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 346         case "$head_sha1" in
 347         'ref: refs/'*)
 348                 # Uh-oh, the remote told us (http transport done against
 349                 # new style repository with a symref HEAD).
 350                 # Ideally we should skip the guesswork but for now
 351                 # opt for minimum change.
 352                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 353                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 354                 ;;
 355         esac
 356
 357         # The name under $remote_top the remote HEAD seems to point at.
 358         head_points_at=$(
 359                 (
 360                         echo "master"
 361                         cd "$GIT_DIR/$remote_top" &&
 362                         find . -type f -print | sed -e 's/^\.\///'
 363                 ) | (
 364                 done=f
 365                 while read name
 366                 do
 367                         test t = $done && continue
 368                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 369                         if test "$head_sha1" = "$branch_tip"
 370                         then
 371                                 echo "$name"
 372                                 done=t
 373                         fi
 374                 done
 375                 )
 376         )
 377
 378         # Write out remotes/$origin file, and update our "$head_points_at".
 379         case "$head_points_at" in
 380         ?*)
 381                 mkdir -p "$GIT_DIR/remotes" &&
 382                 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
 383                 case "$use_separate_remote" in
 384                 t)      origin_track="$remote_top/$head_points_at"
 385                         git-update-ref HEAD "$head_sha1" ;;
 386                 *)      origin_track="$remote_top/$origin"
 387                         git-update-ref "refs/heads/$origin" "$head_sha1" ;;
 388                 esac &&
 389                 echo >"$GIT_DIR/remotes/$origin" \
 390                 "URL: $repo
 391 Pull: refs/heads/$head_points_at:$origin_track" &&
 392                 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
 393                 while read dotslref
 394                 do
 395                         name=`expr "$dotslref" : './\(.*\)'`
 396                         if test "z$head_points_at" = "z$name"
 397                         then
 398                                 continue
 399                         fi
 400                         if test "$use_separate_remote" = '' &&
 401                            test "z$origin" = "z$name"
 402                         then
 403                                 continue
 404                         fi
 405                         echo "Pull: refs/heads/${name}:$remote_top/${name}"
 406                 done >>"$GIT_DIR/remotes/$origin" &&
 407                 case "$use_separate_remote" in
 408                 t)
 409                         rm -f "refs/remotes/$origin/HEAD"
 410                         git-symbolic-ref "refs/remotes/$origin/HEAD" \
 411                                 "refs/remotes/$origin/$head_points_at"
 412                 esac
 413         esac
 414
 415         case "$no_checkout" in
 416         '')
 417                 test "z$quiet" = z && v=-v || v=
 418                 git-read-tree -m -u $v HEAD HEAD
 419         esac
 420 fi
 421 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 422
 423 trap - 0
 424