Andrew's git - gitweb.git/blob

   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.
   9unset CDPATH
  10
  11die() {
  12        echo >&2 "$@"
  13        exit 1
  14}
  15
  16usage() {
  17        die "Usage: $0 [--template=<template_directory>] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [--depth <n>] [-n] <repo> [<dir>]"
  18}
  19
  20get_repo_base() {
  21        (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  22}
  23
  24if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  25    curl_extra_args="-k"
  26fi
  27
  28http_fetch () {
  29        # $1 = Remote, $2 = Local
  30        curl -nsfL $curl_extra_args "$1" >"$2"
  31}
  32
  33clone_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.
  44Perhaps git-update-server-info needs to be run there?"
  45        while read sha1 refname
  46        do
  47                name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  48                case "$name" in
  49                *^*)    continue;;
  50                esac
  51                case "$bare,$name" in
  52                yes,* | ,heads/* | ,tags/*) ;;
  53                *)      continue ;;
  54                esac
  55                if test -n "$use_separate_remote" &&
  56                   branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  57                then
  58                        tname="remotes/$origin/$branch_name"
  59                else
  60                        tname=$name
  61                fi
  62                git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
  63        done <"$clone_tmp/refs"
  64        rm -fr "$clone_tmp"
  65        http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  66        rm -f "$GIT_DIR/REMOTE_HEAD"
  67}
  68
  69# Read git-fetch-pack -k output and store the remote branches.
  70copy_refs='
  71use File::Path qw(mkpath);
  72use File::Basename qw(dirname);
  73my $git_dir = $ARGV[0];
  74my $use_separate_remote = $ARGV[1];
  75my $origin = $ARGV[2];
  76
  77my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
  78my $tag_top = "tags";
  79
  80sub store {
  81        my ($sha1, $name, $top) = @_;
  82        $name = "$git_dir/refs/$top/$name";
  83        mkpath(dirname($name));
  84        open O, ">", "$name";
  85        print O "$sha1\n";
  86        close O;
  87}
  88
  89open FH, "<", "$git_dir/CLONE_HEAD";
  90while (<FH>) {
  91        my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
  92        next if ($name =~ /\^\173/);
  93        if ($name eq "HEAD") {
  94                open O, ">", "$git_dir/REMOTE_HEAD";
  95                print O "$sha1\n";
  96                close O;
  97                next;
  98        }
  99        if ($name =~ s/^refs\/heads\///) {
 100                store($sha1, $name, $branch_top);
 101                next;
 102        }
 103        if ($name =~ s/^refs\/tags\///) {
 104                store($sha1, $name, $tag_top);
 105                next;
 106        }
 107}
 108close FH;
 109'
 110
 111quiet=
 112local=no
 113use_local=no
 114local_shared=no
 115unset template
 116no_checkout=
 117upload_pack=
 118bare=
 119reference=
 120origin=
 121origin_override=
 122use_separate_remote=t
 123depth=
 124while
 125        case "$#,$1" in
 126        0,*) break ;;
 127        *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 128        *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 129          no_checkout=yes ;;
 130        *,--na|*,--nak|*,--nake|*,--naked|\
 131        *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 132        *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
 133        *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared) 
 134          local_shared=yes; use_local=yes ;;
 135        1,--template) usage ;;
 136        *,--template)
 137                shift; template="--template=$1" ;;
 138        *,--template=*)
 139          template="$1" ;;
 140        *,-q|*,--quiet) quiet=-q ;;
 141        *,--use-separate-remote) ;;
 142        *,--no-separate-remote)
 143                die "clones are always made with separate-remote layout" ;;
 144        1,--reference) usage ;;
 145        *,--reference)
 146                shift; reference="$1" ;;
 147        *,--reference=*)
 148                reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 149        *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 150                case "$2" in
 151                '')
 152                    usage ;;
 153                */*)
 154                    die "'$2' is not suitable for an origin name"
 155                esac
 156                git-check-ref-format "heads/$2" ||
 157                    die "'$2' is not suitable for a branch name"
 158                test -z "$origin_override" ||
 159                    die "Do not give more than one --origin options."
 160                origin_override=yes
 161                origin="$2"; shift
 162                ;;
 163        1,-u|1,--upload-pack) usage ;;
 164        *,-u|*,--upload-pack)
 165                shift
 166                upload_pack="--exec=$1" ;;
 167        1,--depth) usage;;
 168        *,--depth)
 169                shift
 170                depth="--depth=$1";;
 171        *,-*) usage ;;
 172        *) break ;;
 173        esac
 174do
 175        shift
 176done
 177
 178repo="$1"
 179test -n "$repo" ||
 180    die 'you must specify a repository to clone.'
 181
 182# --bare implies --no-checkout and --no-separate-remote
 183if test yes = "$bare"
 184then
 185        if test yes = "$origin_override"
 186        then
 187                die '--bare and --origin $origin options are incompatible.'
 188        fi
 189        no_checkout=yes
 190        use_separate_remote=
 191fi
 192
 193if test -z "$origin"
 194then
 195        origin=origin
 196fi
 197
 198# Turn the source into an absolute path if
 199# it is local
 200if base=$(get_repo_base "$repo"); then
 201        repo="$base"
 202        local=yes
 203fi
 204
 205dir="$2"
 206# Try using "humanish" part of source repo if user didn't specify one
 207[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 208[ -e "$dir" ] && die "destination directory '$dir' already exists."
 209mkdir -p "$dir" &&
 210D=$(cd "$dir" && pwd) &&
 211trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 212case "$bare" in
 213yes)
 214        GIT_DIR="$D" ;;
 215*)
 216        GIT_DIR="$D/.git" ;;
 217esac && export GIT_DIR && git-init ${template+"$template"} || usage
 218
 219if test -n "$reference"
 220then
 221        if test -d "$reference"
 222        then
 223                if test -d "$reference/.git/objects"
 224                then
 225                        reference="$reference/.git"
 226                fi
 227                reference=$(cd "$reference" && pwd)
 228                echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 229                (cd "$reference" && tar cf - refs) |
 230                (cd "$GIT_DIR/refs" &&
 231                 mkdir reference-tmp &&
 232                 cd reference-tmp &&
 233                 tar xf -)
 234        else
 235                die "reference repository '$reference' is not a local directory."
 236        fi
 237fi
 238
 239rm -f "$GIT_DIR/CLONE_HEAD"
 240
 241# We do local magic only when the user tells us to.
 242case "$local,$use_local" in
 243yes,yes)
 244        ( cd "$repo/objects" ) ||
 245                die "-l flag seen but repository '$repo' is not local."
 246
 247        case "$local_shared" in
 248        no)
 249            # See if we can hardlink and drop "l" if not.
 250            sample_file=$(cd "$repo" && \
 251                          find objects -type f -print | sed -e 1q)
 252
 253            # objects directory should not be empty since we are cloning!
 254            test -f "$repo/$sample_file" || exit
 255
 256            l=
 257            if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 258            then
 259                    l=l
 260            fi &&
 261            rm -f "$GIT_DIR/objects/sample" &&
 262            cd "$repo" &&
 263            find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 264            ;;
 265        yes)
 266            mkdir -p "$GIT_DIR/objects/info"
 267            echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 268            ;;
 269        esac
 270        git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 271        ;;
 272*)
 273        case "$repo" in
 274        rsync://*)
 275                case "$depth" in
 276                "") ;;
 277                *) die "shallow over rsync not supported" ;;
 278                esac
 279                rsync $quiet -av --ignore-existing  \
 280                        --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 281                exit
 282                # Look at objects/info/alternates for rsync -- http will
 283                # support it natively and git native ones will do it on the
 284                # remote end.  Not having that file is not a crime.
 285                rsync -q "$repo/objects/info/alternates" \
 286                        "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 287                        rm -f "$GIT_DIR/TMP_ALT"
 288                if test -f "$GIT_DIR/TMP_ALT"
 289                then
 290                    ( cd "$D" &&
 291                      . git-parse-remote &&
 292                      resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 293                    while read alt
 294                    do
 295                        case "$alt" in 'bad alternate: '*) die "$alt";; esac
 296                        case "$quiet" in
 297                        '')     echo >&2 "Getting alternate: $alt" ;;
 298                        esac
 299                        rsync $quiet -av --ignore-existing  \
 300                            --exclude info "$alt" "$GIT_DIR/objects" || exit
 301                    done
 302                    rm -f "$GIT_DIR/TMP_ALT"
 303                fi
 304                git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 305                ;;
 306        https://*|http://*|ftp://*)
 307                case "$depth" in
 308                "") ;;
 309                *) die "shallow over http or ftp not supported" ;;
 310                esac
 311                if test -z "@@NO_CURL@@"
 312                then
 313                        clone_dumb_http "$repo" "$D"
 314                else
 315                        die "http transport not supported, rebuild Git with curl support"
 316                fi
 317                ;;
 318        *)
 319                case "$upload_pack" in
 320                '') git-fetch-pack --all -k $quiet $depth "$repo" ;;
 321                *) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
 322                esac >"$GIT_DIR/CLONE_HEAD" ||
 323                        die "fetch-pack from '$repo' failed."
 324                ;;
 325        esac
 326        ;;
 327esac
 328test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 329
 330if test -f "$GIT_DIR/CLONE_HEAD"
 331then
 332        # Read git-fetch-pack -k output and store the remote branches.
 333        @@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
 334        exit
 335fi
 336
 337cd "$D" || exit
 338
 339if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 340then
 341        # a non-bare repository is always in separate-remote layout
 342        remote_top="refs/remotes/$origin"
 343        head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 344        case "$head_sha1" in
 345        'ref: refs/'*)
 346                # Uh-oh, the remote told us (http transport done against
 347                # new style repository with a symref HEAD).
 348                # Ideally we should skip the guesswork but for now
 349                # opt for minimum change.
 350                head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 351                head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 352                ;;
 353        esac
 354
 355        # The name under $remote_top the remote HEAD seems to point at.
 356        head_points_at=$(
 357                (
 358                        test -f "$GIT_DIR/$remote_top/master" && echo "master"
 359                        cd "$GIT_DIR/$remote_top" &&
 360                        find . -type f -print | sed -e 's/^\.\///'
 361                ) | (
 362                done=f
 363                while read name
 364                do
 365                        test t = $done && continue
 366                        branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 367                        if test "$head_sha1" = "$branch_tip"
 368                        then
 369                                echo "$name"
 370                                done=t
 371                        fi
 372                done
 373                )
 374        )
 375
 376        # Write out remote.$origin config, and update our "$head_points_at".
 377        case "$head_points_at" in
 378        ?*)
 379                # Local default branch
 380                git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
 381
 382                # Tracking branch for the primary branch at the remote.
 383                origin_track="$remote_top/$head_points_at" &&
 384                git-update-ref HEAD "$head_sha1" &&
 385
 386                # Upstream URL
 387                git-repo-config remote."$origin".url "$repo" &&
 388
 389                # Set up the mappings to track the remote branches.
 390                git-repo-config remote."$origin".fetch \
 391                        "+refs/heads/*:$remote_top/*" '^$' &&
 392                rm -f "refs/remotes/$origin/HEAD"
 393                git-symbolic-ref "refs/remotes/$origin/HEAD" \
 394                        "refs/remotes/$origin/$head_points_at" &&
 395
 396                git-repo-config branch."$head_points_at".remote "$origin" &&
 397                git-repo-config branch."$head_points_at".merge "refs/heads/$head_points_at"
 398        esac
 399
 400        case "$no_checkout" in
 401        '')
 402                test "z$quiet" = z && v=-v || v=
 403                git-read-tree -m -u $v HEAD HEAD
 404        esac
 405fi
 406rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 407
 408trap - 0
 409