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="--upload-pack=$1" ;;
 167        *,--upload-pack=*)
 168                upload_pack=--upload-pack=$(expr "$1" : '-[^=]*=\(.*\)') ;;
 169        1,--depth) usage;;
 170        *,--depth)
 171                shift
 172                depth="--depth=$1";;
 173        *,-*) usage ;;
 174        *) break ;;
 175        esac
 176do
 177        shift
 178done
 179
 180repo="$1"
 181test -n "$repo" ||
 182    die 'you must specify a repository to clone.'
 183
 184# --bare implies --no-checkout and --no-separate-remote
 185if test yes = "$bare"
 186then
 187        if test yes = "$origin_override"
 188        then
 189                die '--bare and --origin $origin options are incompatible.'
 190        fi
 191        no_checkout=yes
 192        use_separate_remote=
 193fi
 194
 195if test -z "$origin"
 196then
 197        origin=origin
 198fi
 199
 200# Turn the source into an absolute path if
 201# it is local
 202if base=$(get_repo_base "$repo"); then
 203        repo="$base"
 204        local=yes
 205fi
 206
 207dir="$2"
 208# Try using "humanish" part of source repo if user didn't specify one
 209[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 210[ -e "$dir" ] && die "destination directory '$dir' already exists."
 211mkdir -p "$dir" &&
 212D=$(cd "$dir" && pwd) &&
 213trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 214case "$bare" in
 215yes)
 216        GIT_DIR="$D" ;;
 217*)
 218        GIT_DIR="$D/.git" ;;
 219esac && export GIT_DIR && git-init ${template+"$template"} || usage
 220
 221if test -n "$reference"
 222then
 223        if test -d "$reference"
 224        then
 225                if test -d "$reference/.git/objects"
 226                then
 227                        reference="$reference/.git"
 228                fi
 229                reference=$(cd "$reference" && pwd)
 230                echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 231                (cd "$reference" && tar cf - refs) |
 232                (cd "$GIT_DIR/refs" &&
 233                 mkdir reference-tmp &&
 234                 cd reference-tmp &&
 235                 tar xf -)
 236        else
 237                die "reference repository '$reference' is not a local directory."
 238        fi
 239fi
 240
 241rm -f "$GIT_DIR/CLONE_HEAD"
 242
 243# We do local magic only when the user tells us to.
 244case "$local,$use_local" in
 245yes,yes)
 246        ( cd "$repo/objects" ) ||
 247                die "-l flag seen but repository '$repo' is not local."
 248
 249        case "$local_shared" in
 250        no)
 251            # See if we can hardlink and drop "l" if not.
 252            sample_file=$(cd "$repo" && \
 253                          find objects -type f -print | sed -e 1q)
 254
 255            # objects directory should not be empty since we are cloning!
 256            test -f "$repo/$sample_file" || exit
 257
 258            l=
 259            if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 260            then
 261                    l=l
 262            fi &&
 263            rm -f "$GIT_DIR/objects/sample" &&
 264            cd "$repo" &&
 265            find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 266            ;;
 267        yes)
 268            mkdir -p "$GIT_DIR/objects/info"
 269            echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 270            ;;
 271        esac
 272        git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 273        ;;
 274*)
 275        case "$repo" in
 276        rsync://*)
 277                case "$depth" in
 278                "") ;;
 279                *) die "shallow over rsync not supported" ;;
 280                esac
 281                rsync $quiet -av --ignore-existing  \
 282                        --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 283                exit
 284                # Look at objects/info/alternates for rsync -- http will
 285                # support it natively and git native ones will do it on the
 286                # remote end.  Not having that file is not a crime.
 287                rsync -q "$repo/objects/info/alternates" \
 288                        "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 289                        rm -f "$GIT_DIR/TMP_ALT"
 290                if test -f "$GIT_DIR/TMP_ALT"
 291                then
 292                    ( cd "$D" &&
 293                      . git-parse-remote &&
 294                      resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 295                    while read alt
 296                    do
 297                        case "$alt" in 'bad alternate: '*) die "$alt";; esac
 298                        case "$quiet" in
 299                        '')     echo >&2 "Getting alternate: $alt" ;;
 300                        esac
 301                        rsync $quiet -av --ignore-existing  \
 302                            --exclude info "$alt" "$GIT_DIR/objects" || exit
 303                    done
 304                    rm -f "$GIT_DIR/TMP_ALT"
 305                fi
 306                git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 307                ;;
 308        https://*|http://*|ftp://*)
 309                case "$depth" in
 310                "") ;;
 311                *) die "shallow over http or ftp not supported" ;;
 312                esac
 313                if test -z "@@NO_CURL@@"
 314                then
 315                        clone_dumb_http "$repo" "$D"
 316                else
 317                        die "http transport not supported, rebuild Git with curl support"
 318                fi
 319                ;;
 320        *)
 321                case "$upload_pack" in
 322                '') git-fetch-pack --all -k $quiet $depth "$repo" ;;
 323                *) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
 324                esac >"$GIT_DIR/CLONE_HEAD" ||
 325                        die "fetch-pack from '$repo' failed."
 326                ;;
 327        esac
 328        ;;
 329esac
 330test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 331
 332if test -f "$GIT_DIR/CLONE_HEAD"
 333then
 334        # Read git-fetch-pack -k output and store the remote branches.
 335        @@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
 336        exit
 337fi
 338
 339cd "$D" || exit
 340
 341if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 342then
 343        # a non-bare repository is always in separate-remote layout
 344        remote_top="refs/remotes/$origin"
 345        head_sha1=`cat "$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                        test -f "$GIT_DIR/$remote_top/master" && 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 "$name"
 372                                done=t
 373                        fi
 374                done
 375                )
 376        )
 377
 378        # Write out remote.$origin config, and update our "$head_points_at".
 379        case "$head_points_at" in
 380        ?*)
 381                # Local default branch
 382                git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
 383
 384                # Tracking branch for the primary branch at the remote.
 385                origin_track="$remote_top/$head_points_at" &&
 386                git-update-ref HEAD "$head_sha1" &&
 387
 388                # Upstream URL
 389                git-repo-config remote."$origin".url "$repo" &&
 390
 391                # Set up the mappings to track the remote branches.
 392                git-repo-config remote."$origin".fetch \
 393                        "+refs/heads/*:$remote_top/*" '^$' &&
 394                rm -f "refs/remotes/$origin/HEAD"
 395                git-symbolic-ref "refs/remotes/$origin/HEAD" \
 396                        "refs/remotes/$origin/$head_points_at" &&
 397
 398                git-repo-config branch."$head_points_at".remote "$origin" &&
 399                git-repo-config branch."$head_points_at".merge "refs/heads/$head_points_at"
 400        esac
 401
 402        case "$no_checkout" in
 403        '')
 404                test "z$quiet" = z && v=-v || v=
 405                git-read-tree -m -u $v HEAD HEAD
 406        esac
 407fi
 408rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 409
 410trap - 0
 411