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        (
  22                cd "`/bin/pwd`" &&
  23                cd "$1" || cd "$1.git" &&
  24                {
  25                        cd .git
  26                        pwd
  27                }
  28        ) 2>/dev/null
  29}
  30
  31if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  32    curl_extra_args="-k"
  33fi
  34
  35http_fetch () {
  36        # $1 = Remote, $2 = Local
  37        curl -nsfL $curl_extra_args "$1" >"$2" ||
  38                case $? in
  39                126|127) exit ;;
  40                *)       return $? ;;
  41                esac
  42}
  43
  44clone_dumb_http () {
  45        # $1 - remote, $2 - local
  46        cd "$2" &&
  47        clone_tmp="$GIT_DIR/clone-tmp" &&
  48        mkdir -p "$clone_tmp" || exit 1
  49        if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
  50                "`git config --bool http.noEPSV`" = true ]; then
  51                curl_extra_args="${curl_extra_args} --disable-epsv"
  52        fi
  53        http_fetch "$1/info/refs" "$clone_tmp/refs" ||
  54                die "Cannot get remote repository information.
  55Perhaps git-update-server-info needs to be run there?"
  56        test "z$quiet" = z && v=-v || v=
  57        while read sha1 refname
  58        do
  59                name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  60                case "$name" in
  61                *^*)    continue;;
  62                esac
  63                case "$bare,$name" in
  64                yes,* | ,heads/* | ,tags/*) ;;
  65                *)      continue ;;
  66                esac
  67                if test -n "$use_separate_remote" &&
  68                   branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  69                then
  70                        tname="remotes/$origin/$branch_name"
  71                else
  72                        tname=$name
  73                fi
  74                git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
  75        done <"$clone_tmp/refs"
  76        rm -fr "$clone_tmp"
  77        http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  78        rm -f "$GIT_DIR/REMOTE_HEAD"
  79        if test -f "$GIT_DIR/REMOTE_HEAD"; then
  80                head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
  81                case "$head_sha1" in
  82                'ref: refs/'*)
  83                        ;;
  84                *)
  85                        git-http-fetch $v -a "$head_sha1" "$1" ||
  86                        rm -f "$GIT_DIR/REMOTE_HEAD"
  87                        ;;
  88                esac
  89        fi
  90}
  91
  92quiet=
  93local=no
  94use_local_hardlink=yes
  95local_shared=no
  96unset template
  97no_checkout=
  98upload_pack=
  99bare=
 100reference=
 101origin=
 102origin_override=
 103use_separate_remote=t
 104depth=
 105no_progress=
 106local_explicitly_asked_for=
 107test -t 1 || no_progress=--no-progress
 108while
 109        case "$#,$1" in
 110        0,*) break ;;
 111        *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 112        *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 113          no_checkout=yes ;;
 114        *,--na|*,--nak|*,--nake|*,--naked|\
 115        *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 116        *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local)
 117          local_explicitly_asked_for=yes
 118          use_local_hardlink=yes ;;
 119        *,--no-h|*,--no-ha|*,--no-har|*,--no-hard|*,--no-hardl|\
 120        *,--no-hardli|*,--no-hardlin|*,--no-hardlink|*,--no-hardlinks)
 121          use_local_hardlink=no ;;
 122        *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 123          local_shared=yes; ;;
 124        1,--template) usage ;;
 125        *,--template)
 126                shift; template="--template=$1" ;;
 127        *,--template=*)
 128          template="$1" ;;
 129        *,-q|*,--quiet) quiet=-q ;;
 130        *,--use-separate-remote) ;;
 131        *,--no-separate-remote)
 132                die "clones are always made with separate-remote layout" ;;
 133        1,--reference) usage ;;
 134        *,--reference)
 135                shift; reference="$1" ;;
 136        *,--reference=*)
 137                reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 138        *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 139                case "$2" in
 140                '')
 141                    usage ;;
 142                */*)
 143                    die "'$2' is not suitable for an origin name"
 144                esac
 145                git check-ref-format "heads/$2" ||
 146                    die "'$2' is not suitable for a branch name"
 147                test -z "$origin_override" ||
 148                    die "Do not give more than one --origin options."
 149                origin_override=yes
 150                origin="$2"; shift
 151                ;;
 152        1,-u|1,--upload-pack) usage ;;
 153        *,-u|*,--upload-pack)
 154                shift
 155                upload_pack="--upload-pack=$1" ;;
 156        *,--upload-pack=*)
 157                upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
 158        1,--depth) usage;;
 159        *,--depth)
 160                shift
 161                depth="--depth=$1";;
 162        *,-*) usage ;;
 163        *) break ;;
 164        esac
 165do
 166        shift
 167done
 168
 169repo="$1"
 170test -n "$repo" ||
 171    die 'you must specify a repository to clone.'
 172
 173# --bare implies --no-checkout and --no-separate-remote
 174if test yes = "$bare"
 175then
 176        if test yes = "$origin_override"
 177        then
 178                die '--bare and --origin $origin options are incompatible.'
 179        fi
 180        no_checkout=yes
 181        use_separate_remote=
 182fi
 183
 184if test -z "$origin"
 185then
 186        origin=origin
 187fi
 188
 189# Turn the source into an absolute path if
 190# it is local
 191if base=$(get_repo_base "$repo"); then
 192        repo="$base"
 193        local=yes
 194fi
 195
 196dir="$2"
 197# Try using "humanish" part of source repo if user didn't specify one
 198[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 199[ -e "$dir" ] && die "destination directory '$dir' already exists."
 200[ yes = "$bare" ] && unset GIT_WORK_TREE
 201[ -n "$GIT_WORK_TREE" ] && [ -e "$GIT_WORK_TREE" ] &&
 202die "working tree '$GIT_WORK_TREE' already exists."
 203D=
 204W=
 205cleanup() {
 206        err=$?
 207        test -z "$D" && rm -rf "$dir"
 208        test -z "$W" && test -n "$GIT_WORK_TREE" && rm -rf "$GIT_WORK_TREE"
 209        cd ..
 210        test -n "$D" && rm -rf "$D"
 211        test -n "$W" && rm -rf "$W"
 212        exit $err
 213}
 214trap cleanup 0
 215mkdir -p "$dir" && D=$(cd "$dir" && pwd) || usage
 216test -n "$GIT_WORK_TREE" && mkdir -p "$GIT_WORK_TREE" &&
 217W=$(cd "$GIT_WORK_TREE" && pwd) && export GIT_WORK_TREE="$W"
 218if test yes = "$bare" || test -n "$GIT_WORK_TREE"; then
 219        GIT_DIR="$D"
 220else
 221        GIT_DIR="$D/.git"
 222fi &&
 223export GIT_DIR &&
 224GIT_CONFIG="$GIT_DIR/config" git-init $quiet ${template+"$template"} || usage
 225
 226if test -n "$bare"
 227then
 228        GIT_CONFIG="$GIT_DIR/config" git config core.bare true
 229fi
 230
 231if test -n "$reference"
 232then
 233        ref_git=
 234        if test -d "$reference"
 235        then
 236                if test -d "$reference/.git/objects"
 237                then
 238                        ref_git="$reference/.git"
 239                elif test -d "$reference/objects"
 240                then
 241                        ref_git="$reference"
 242                fi
 243        fi
 244        if test -n "$ref_git"
 245        then
 246                ref_git=$(cd "$ref_git" && pwd)
 247                echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
 248                (
 249                        GIT_DIR="$ref_git" git for-each-ref \
 250                                --format='%(objectname) %(*objectname)'
 251                ) |
 252                while read a b
 253                do
 254                        test -z "$a" ||
 255                        git update-ref "refs/reference-tmp/$a" "$a"
 256                        test -z "$b" ||
 257                        git update-ref "refs/reference-tmp/$b" "$b"
 258                done
 259        else
 260                die "reference repository '$reference' is not a local directory."
 261        fi
 262fi
 263
 264rm -f "$GIT_DIR/CLONE_HEAD"
 265
 266# We do local magic only when the user tells us to.
 267case "$local" in
 268yes)
 269        ( cd "$repo/objects" ) ||
 270                die "cannot chdir to local '$repo/objects'."
 271
 272        if test "$local_shared" = yes
 273        then
 274                mkdir -p "$GIT_DIR/objects/info"
 275                echo "$repo/objects" >>"$GIT_DIR/objects/info/alternates"
 276        else
 277                l= &&
 278                if test "$use_local_hardlink" = yes
 279                then
 280                        # See if we can hardlink and drop "l" if not.
 281                        sample_file=$(cd "$repo" && \
 282                                      find objects -type f -print | sed -e 1q)
 283                        # objects directory should not be empty because
 284                        # we are cloning!
 285                        test -f "$repo/$sample_file" || exit
 286                        if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 287                        then
 288                                rm -f "$GIT_DIR/objects/sample"
 289                                l=l
 290                        elif test -n "$local_explicitly_asked_for"
 291                        then
 292                                echo >&2 "Warning: -l asked but cannot hardlink to $repo"
 293                        fi
 294                fi &&
 295                cd "$repo" &&
 296                find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 297        fi
 298        git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 299        ;;
 300*)
 301        case "$repo" in
 302        rsync://*)
 303                case "$depth" in
 304                "") ;;
 305                *) die "shallow over rsync not supported" ;;
 306                esac
 307                rsync $quiet -av --ignore-existing  \
 308                        --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 309                exit
 310                # Look at objects/info/alternates for rsync -- http will
 311                # support it natively and git native ones will do it on the
 312                # remote end.  Not having that file is not a crime.
 313                rsync -q "$repo/objects/info/alternates" \
 314                        "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 315                        rm -f "$GIT_DIR/TMP_ALT"
 316                if test -f "$GIT_DIR/TMP_ALT"
 317                then
 318                    ( cd "$D" &&
 319                      . git-parse-remote &&
 320                      resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 321                    while read alt
 322                    do
 323                        case "$alt" in 'bad alternate: '*) die "$alt";; esac
 324                        case "$quiet" in
 325                        '')     echo >&2 "Getting alternate: $alt" ;;
 326                        esac
 327                        rsync $quiet -av --ignore-existing  \
 328                            --exclude info "$alt" "$GIT_DIR/objects" || exit
 329                    done
 330                    rm -f "$GIT_DIR/TMP_ALT"
 331                fi
 332                git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 333                ;;
 334        https://*|http://*|ftp://*)
 335                case "$depth" in
 336                "") ;;
 337                *) die "shallow over http or ftp not supported" ;;
 338                esac
 339                if test -z "@@NO_CURL@@"
 340                then
 341                        clone_dumb_http "$repo" "$D"
 342                else
 343                        die "http transport not supported, rebuild Git with curl support"
 344                fi
 345                ;;
 346        *)
 347                case "$upload_pack" in
 348                '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
 349                *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
 350                esac >"$GIT_DIR/CLONE_HEAD" ||
 351                        die "fetch-pack from '$repo' failed."
 352                ;;
 353        esac
 354        ;;
 355esac
 356test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 357
 358if test -f "$GIT_DIR/CLONE_HEAD"
 359then
 360        # Read git-fetch-pack -k output and store the remote branches.
 361        if [ -n "$use_separate_remote" ]
 362        then
 363                branch_top="remotes/$origin"
 364        else
 365                branch_top="heads"
 366        fi
 367        tag_top="tags"
 368        while read sha1 name
 369        do
 370                case "$name" in
 371                *'^{}')
 372                        continue ;;
 373                HEAD)
 374                        destname="REMOTE_HEAD" ;;
 375                refs/heads/*)
 376                        destname="refs/$branch_top/${name#refs/heads/}" ;;
 377                refs/tags/*)
 378                        destname="refs/$tag_top/${name#refs/tags/}" ;;
 379                *)
 380                        continue ;;
 381                esac
 382                git update-ref -m "clone: from $repo" "$destname" "$sha1" ""
 383        done < "$GIT_DIR/CLONE_HEAD"
 384fi
 385
 386if test -n "$W"; then
 387        cd "$W" || exit
 388else
 389        cd "$D" || exit
 390fi
 391
 392if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 393then
 394        # a non-bare repository is always in separate-remote layout
 395        remote_top="refs/remotes/$origin"
 396        head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 397        case "$head_sha1" in
 398        'ref: refs/'*)
 399                # Uh-oh, the remote told us (http transport done against
 400                # new style repository with a symref HEAD).
 401                # Ideally we should skip the guesswork but for now
 402                # opt for minimum change.
 403                head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 404                head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 405                ;;
 406        esac
 407
 408        # The name under $remote_top the remote HEAD seems to point at.
 409        head_points_at=$(
 410                (
 411                        test -f "$GIT_DIR/$remote_top/master" && echo "master"
 412                        cd "$GIT_DIR/$remote_top" &&
 413                        find . -type f -print | sed -e 's/^\.\///'
 414                ) | (
 415                done=f
 416                while read name
 417                do
 418                        test t = $done && continue
 419                        branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 420                        if test "$head_sha1" = "$branch_tip"
 421                        then
 422                                echo "$name"
 423                                done=t
 424                        fi
 425                done
 426                )
 427        )
 428
 429        # Upstream URL
 430        git config remote."$origin".url "$repo" &&
 431
 432        # Set up the mappings to track the remote branches.
 433        git config remote."$origin".fetch \
 434                "+refs/heads/*:$remote_top/*" '^$' &&
 435
 436        # Write out remote.$origin config, and update our "$head_points_at".
 437        case "$head_points_at" in
 438        ?*)
 439                # Local default branch
 440                git symbolic-ref HEAD "refs/heads/$head_points_at" &&
 441
 442                # Tracking branch for the primary branch at the remote.
 443                git update-ref HEAD "$head_sha1" &&
 444
 445                rm -f "refs/remotes/$origin/HEAD"
 446                git symbolic-ref "refs/remotes/$origin/HEAD" \
 447                        "refs/remotes/$origin/$head_points_at" &&
 448
 449                git config branch."$head_points_at".remote "$origin" &&
 450                git config branch."$head_points_at".merge "refs/heads/$head_points_at"
 451                ;;
 452        '')
 453                # Source had detached HEAD pointing nowhere
 454                git update-ref --no-deref HEAD "$head_sha1" &&
 455                rm -f "refs/remotes/$origin/HEAD"
 456                ;;
 457        esac
 458
 459        case "$no_checkout" in
 460        '')
 461                test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
 462                git read-tree -m -u $v HEAD HEAD
 463        esac
 464fi
 465rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 466
 467trap - 0