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 [--template=<template_directory>] [--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_DIR/clone-tmp" &&
  33         mkdir -p "$clone_tmp" || exit 1
  34         if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
  35                 "`git-repo-config --bool http.noEPSV`" = true ]; then
  36                 curl_extra_args="${curl_extra_args} --disable-epsv"
  37         fi
  38         http_fetch "$1/info/refs" "$clone_tmp/refs" || {
  39                 echo >&2 "Cannot get remote repository information.
  40 Perhaps git-update-server-info needs to be run there?"
  41                 exit 1;
  42         }
  43         while read sha1 refname
  44         do
  45                 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  46                 case "$name" in
  47                 *^*)    continue;;
  48                 esac
  49                 if test -n "$use_separate_remote" &&
  50                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  51                 then
  52                         tname="remotes/$origin/$branch_name"
  53                 else
  54                         tname=$name
  55                 fi
  56                 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
  57         done <"$clone_tmp/refs"
  58         rm -fr "$clone_tmp"
  59         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  60         rm -f "$GIT_DIR/REMOTE_HEAD"
  61 }
  62
  63 # Read git-fetch-pack -k output and store the remote branches.
  64 copy_refs='
  65 use File::Path qw(mkpath);
  66 use File::Basename qw(dirname);
  67 my $git_dir = $ARGV[0];
  68 my $use_separate_remote = $ARGV[1];
  69 my $origin = $ARGV[2];
  70
  71 my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
  72 my $tag_top = "tags";
  73
  74 sub store {
  75         my ($sha1, $name, $top) = @_;
  76         $name = "$git_dir/refs/$top/$name";
  77         mkpath(dirname($name));
  78         open O, ">", "$name";
  79         print O "$sha1\n";
  80         close O;
  81 }
  82
  83 open FH, "<", "$git_dir/CLONE_HEAD";
  84 while (<FH>) {
  85         my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
  86         next if ($name =~ /\^\173/);
  87         if ($name eq "HEAD") {
  88                 open O, ">", "$git_dir/REMOTE_HEAD";
  89                 print O "$sha1\n";
  90                 close O;
  91                 next;
  92         }
  93         if ($name =~ s/^refs\/heads\///) {
  94                 store($sha1, $name, $branch_top);
  95                 next;
  96         }
  97         if ($name =~ s/^refs\/tags\///) {
  98                 store($sha1, $name, $tag_top);
  99                 next;
 100         }
 101 }
 102 close FH;
 103 '
 104
 105 quiet=
 106 local=no
 107 use_local=no
 108 local_shared=no
 109 unset template
 110 no_checkout=
 111 upload_pack=
 112 bare=
 113 reference=
 114 origin=
 115 origin_override=
 116 use_separate_remote=
 117 while
 118         case "$#,$1" in
 119         0,*) break ;;
 120         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 121         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 122           no_checkout=yes ;;
 123         *,--na|*,--nak|*,--nake|*,--naked|\
 124         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 125         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
 126         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 127           local_shared=yes; use_local=yes ;;
 128         1,--template) usage ;;
 129         *,--template)
 130                 shift; template="--template=$1" ;;
 131         *,--template=*)
 132           template="$1" ;;
 133         *,-q|*,--quiet) quiet=-q ;;
 134         *,--use-separate-remote)
 135                 use_separate_remote=t ;;
 136         1,--reference) usage ;;
 137         *,--reference)
 138                 shift; reference="$1" ;;
 139         *,--reference=*)
 140                 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 141         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 142                 case "$2" in
 143                 '')
 144                     usage ;;
 145                 */*)
 146                     echo >&2 "'$2' is not suitable for an origin name"
 147                     exit 1
 148                 esac
 149                 git-check-ref-format "heads/$2" || {
 150                     echo >&2 "'$2' is not suitable for a branch name"
 151                     exit 1
 152                 }
 153                 test -z "$origin_override" || {
 154                     echo >&2 "Do not give more than one --origin options."
 155                     exit 1
 156                 }
 157                 origin_override=yes
 158                 origin="$2"; shift
 159                 ;;
 160         1,-u|1,--upload-pack) usage ;;
 161         *,-u|*,--upload-pack)
 162                 shift
 163                 upload_pack="--exec=$1" ;;
 164         *,-*) usage ;;
 165         *) break ;;
 166         esac
 167 do
 168         shift
 169 done
 170
 171 repo="$1"
 172 if test -z "$repo"
 173 then
 174     echo >&2 'you must specify a repository to clone.'
 175     exit 1
 176 fi
 177
 178 # --bare implies --no-checkout
 179 if test yes = "$bare"
 180 then
 181         if test yes = "$origin_override"
 182         then
 183                 echo >&2 '--bare and --origin $origin options are incompatible.'
 184                 exit 1
 185         fi
 186         if test t = "$use_separate_remote"
 187         then
 188                 echo >&2 '--bare and --use-separate-remote options are incompatible.'
 189                 exit 1
 190         fi
 191         no_checkout=yes
 192 fi
 193
 194 if test -z "$origin"
 195 then
 196         origin=origin
 197 fi
 198
 199 # Turn the source into an absolute path if
 200 # it is local
 201 if base=$(get_repo_base "$repo"); then
 202         repo="$base"
 203         local=yes
 204 fi
 205
 206 dir="$2"
 207 # Try using "humanish" part of source repo if user didn't specify one
 208 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 209 [ -e "$dir" ] && echo "$dir already exists." && usage
 210 mkdir -p "$dir" &&
 211 D=$(cd "$dir" && pwd) &&
 212 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 213 case "$bare" in
 214 yes)
 215         GIT_DIR="$D" ;;
 216 *)
 217         GIT_DIR="$D/.git" ;;
 218 esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
 219
 220 if test -n "$reference"
 221 then
 222         if test -d "$reference"
 223         then
 224                 if test -d "$reference/.git/objects"
 225                 then
 226                         reference="$reference/.git"
 227                 fi
 228                 reference=$(cd "$reference" && pwd)
 229                 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 230                 (cd "$reference" && tar cf - refs) |
 231                 (cd "$GIT_DIR/refs" &&
 232                  mkdir reference-tmp &&
 233                  cd reference-tmp &&
 234                  tar xf -)
 235         else
 236                 echo >&2 "$reference: not a local directory." && usage
 237         fi
 238 fi
 239
 240 rm -f "$GIT_DIR/CLONE_HEAD"
 241
 242 # We do local magic only when the user tells us to.
 243 case "$local,$use_local" in
 244 yes,yes)
 245         ( cd "$repo/objects" ) || {
 246                 echo >&2 "-l flag seen but $repo is not local."
 247                 exit 1
 248         }
 249
 250         case "$local_shared" in
 251         no)
 252             # See if we can hardlink and drop "l" if not.
 253             sample_file=$(cd "$repo" && \
 254                           find objects -type f -print | sed -e 1q)
 255
 256             # objects directory should not be empty since we are cloning!
 257             test -f "$repo/$sample_file" || exit
 258
 259             l=
 260             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 261             then
 262                     l=l
 263             fi &&
 264             rm -f "$GIT_DIR/objects/sample" &&
 265             cd "$repo" &&
 266             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 267             ;;
 268         yes)
 269             mkdir -p "$GIT_DIR/objects/info"
 270             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 271             ;;
 272         esac
 273         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 274         ;;
 275 *)
 276         case "$repo" in
 277         rsync://*)
 278                 rsync $quiet -av --ignore-existing  \
 279                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 280                 exit
 281                 # Look at objects/info/alternates for rsync -- http will
 282                 # support it natively and git native ones will do it on the
 283                 # remote end.  Not having that file is not a crime.
 284                 rsync -q "$repo/objects/info/alternates" \
 285                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 286                         rm -f "$GIT_DIR/TMP_ALT"
 287                 if test -f "$GIT_DIR/TMP_ALT"
 288                 then
 289                     ( cd "$D" &&
 290                       . git-parse-remote &&
 291                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 292                     while read alt
 293                     do
 294                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 295                         case "$quiet" in
 296                         '')     echo >&2 "Getting alternate: $alt" ;;
 297                         esac
 298                         rsync $quiet -av --ignore-existing  \
 299                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 300                     done
 301                     rm -f "$GIT_DIR/TMP_ALT"
 302                 fi
 303                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 304                 ;;
 305         https://*|http://*|ftp://*)
 306                 if test -z "@@NO_CURL@@"
 307                 then
 308                         clone_dumb_http "$repo" "$D"
 309                 else
 310                         echo >&2 "http transport not supported, rebuild Git with curl support"
 311                         exit 1
 312                 fi
 313                 ;;
 314         *)
 315                 case "$upload_pack" in
 316                 '') git-fetch-pack --all -k $quiet "$repo" ;;
 317                 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
 318                 esac >"$GIT_DIR/CLONE_HEAD" || {
 319                         echo >&2 "fetch-pack from '$repo' failed."
 320                         exit 1
 321                 }
 322                 ;;
 323         esac
 324         ;;
 325 esac
 326 test -d "$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                 git-read-tree -m -u -v HEAD HEAD
 418         esac
 419 fi
 420 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 421
 422 trap - 0
 423