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