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" -o \
  32        "`git config --bool http.sslVerify`" = false ]; then
  33    curl_extra_args="-k"
  34fi
  35
  36http_fetch () {
  37        # $1 = Remote, $2 = Local
  38        curl -nsfL $curl_extra_args "$1" >"$2"
  39        curl_exit_status=$?
  40        case $curl_exit_status in
  41        126|127) exit ;;
  42        *)       return $curl_exit_status ;;
  43        esac
  44}
  45
  46clone_dumb_http () {
  47        # $1 - remote, $2 - local
  48        cd "$2" &&
  49        clone_tmp="$GIT_DIR/clone-tmp" &&
  50        mkdir -p "$clone_tmp" || exit 1
  51        if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
  52                "`git config --bool http.noEPSV`" = true ]; then
  53                curl_extra_args="${curl_extra_args} --disable-epsv"
  54        fi
  55        http_fetch "$1/info/refs" "$clone_tmp/refs" ||
  56                die "Cannot get remote repository information.
  57Perhaps git-update-server-info needs to be run there?"
  58        test "z$quiet" = z && v=-v || v=
  59        while read sha1 refname
  60        do
  61                name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  62                case "$name" in
  63                *^*)    continue;;
  64                esac
  65                case "$bare,$name" in
  66                yes,* | ,heads/* | ,tags/*) ;;
  67                *)      continue ;;
  68                esac
  69                if test -n "$use_separate_remote" &&
  70                   branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  71                then
  72                        tname="remotes/$origin/$branch_name"
  73                else
  74                        tname=$name
  75                fi
  76                git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
  77        done <"$clone_tmp/refs"
  78        rm -fr "$clone_tmp"
  79        http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  80        rm -f "$GIT_DIR/REMOTE_HEAD"
  81        if test -f "$GIT_DIR/REMOTE_HEAD"; then
  82                head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
  83                case "$head_sha1" in
  84                'ref: refs/'*)
  85                        ;;
  86                *)
  87                        git-http-fetch $v -a "$head_sha1" "$1" ||
  88                        rm -f "$GIT_DIR/REMOTE_HEAD"
  89                        ;;
  90                esac
  91        fi
  92}
  93
  94quiet=
  95local=no
  96use_local_hardlink=yes
  97local_shared=no
  98unset template
  99no_checkout=
 100upload_pack=
 101bare=
 102reference=
 103origin=
 104origin_override=
 105use_separate_remote=t
 106depth=
 107no_progress=
 108local_explicitly_asked_for=
 109test -t 1 || no_progress=--no-progress
 110while
 111        case "$#,$1" in
 112        0,*) break ;;
 113        *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 114        *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 115          no_checkout=yes ;;
 116        *,--na|*,--nak|*,--nake|*,--naked|\
 117        *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 118        *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local)
 119          local_explicitly_asked_for=yes
 120          use_local_hardlink=yes ;;
 121        *,--no-h|*,--no-ha|*,--no-har|*,--no-hard|*,--no-hardl|\
 122        *,--no-hardli|*,--no-hardlin|*,--no-hardlink|*,--no-hardlinks)
 123          use_local_hardlink=no ;;
 124        *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 125          local_shared=yes; ;;
 126        1,--template) usage ;;
 127        *,--template)
 128                shift; template="--template=$1" ;;
 129        *,--template=*)
 130          template="$1" ;;
 131        *,-q|*,--quiet) quiet=-q ;;
 132        *,--use-separate-remote) ;;
 133        *,--no-separate-remote)
 134                die "clones are always made with separate-remote layout" ;;
 135        1,--reference) usage ;;
 136        *,--reference)
 137                shift; reference="$1" ;;
 138        *,--reference=*)
 139                reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 140        *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 141                case "$2" in
 142                '')
 143                    usage ;;
 144                */*)
 145                    die "'$2' is not suitable for an origin name"
 146                esac
 147                git check-ref-format "heads/$2" ||
 148                    die "'$2' is not suitable for a branch name"
 149                test -z "$origin_override" ||
 150                    die "Do not give more than one --origin options."
 151                origin_override=yes
 152                origin="$2"; shift
 153                ;;
 154        1,-u|1,--upload-pack) usage ;;
 155        *,-u|*,--upload-pack)
 156                shift
 157                upload_pack="--upload-pack=$1" ;;
 158        *,--upload-pack=*)
 159                upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
 160        1,--depth) usage;;
 161        *,--depth)
 162                shift
 163                depth="--depth=$1";;
 164        *,-*) usage ;;
 165        *) break ;;
 166        esac
 167do
 168        shift
 169done
 170
 171repo="$1"
 172test -n "$repo" ||
 173    die 'you must specify a repository to clone.'
 174
 175# --bare implies --no-checkout and --no-separate-remote
 176if test yes = "$bare"
 177then
 178        if test yes = "$origin_override"
 179        then
 180                die '--bare and --origin $origin options are incompatible.'
 181        fi
 182        no_checkout=yes
 183        use_separate_remote=
 184fi
 185
 186if test -z "$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."
 202[ yes = "$bare" ] && unset GIT_WORK_TREE
 203[ -n "$GIT_WORK_TREE" ] && [ -e "$GIT_WORK_TREE" ] &&
 204die "working tree '$GIT_WORK_TREE' already exists."
 205D=
 206W=
 207cleanup() {
 208        err=$?
 209        test -z "$D" && rm -rf "$dir"
 210        test -z "$W" && test -n "$GIT_WORK_TREE" && rm -rf "$GIT_WORK_TREE"
 211        cd ..
 212        test -n "$D" && rm -rf "$D"
 213        test -n "$W" && rm -rf "$W"
 214        exit $err
 215}
 216trap cleanup 0
 217mkdir -p "$dir" && D=$(cd "$dir" && pwd) || usage
 218test -n "$GIT_WORK_TREE" && mkdir -p "$GIT_WORK_TREE" &&
 219W=$(cd "$GIT_WORK_TREE" && pwd) && export GIT_WORK_TREE="$W"
 220if test yes = "$bare" || test -n "$GIT_WORK_TREE"; then
 221        GIT_DIR="$D"
 222else
 223        GIT_DIR="$D/.git"
 224fi &&
 225export GIT_DIR &&
 226GIT_CONFIG="$GIT_DIR/config" git-init $quiet ${template+"$template"} || usage
 227
 228if test -n "$bare"
 229then
 230        GIT_CONFIG="$GIT_DIR/config" git config core.bare true
 231fi
 232
 233if test -n "$reference"
 234then
 235        ref_git=
 236        if test -d "$reference"
 237        then
 238                if test -d "$reference/.git/objects"
 239                then
 240                        ref_git="$reference/.git"
 241                elif test -d "$reference/objects"
 242                then
 243                        ref_git="$reference"
 244                fi
 245        fi
 246        if test -n "$ref_git"
 247        then
 248                ref_git=$(cd "$ref_git" && pwd)
 249                echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
 250                (
 251                        GIT_DIR="$ref_git" git for-each-ref \
 252                                --format='%(objectname) %(*objectname)'
 253                ) |
 254                while read a b
 255                do
 256                        test -z "$a" ||
 257                        git update-ref "refs/reference-tmp/$a" "$a"
 258                        test -z "$b" ||
 259                        git update-ref "refs/reference-tmp/$b" "$b"
 260                done
 261        else
 262                die "reference repository '$reference' is not a local directory."
 263        fi
 264fi
 265
 266rm -f "$GIT_DIR/CLONE_HEAD"
 267
 268# We do local magic only when the user tells us to.
 269case "$local" in
 270yes)
 271        ( cd "$repo/objects" ) ||
 272                die "cannot chdir to local '$repo/objects'."
 273
 274        if test "$local_shared" = yes
 275        then
 276                mkdir -p "$GIT_DIR/objects/info"
 277                echo "$repo/objects" >>"$GIT_DIR/objects/info/alternates"
 278        else
 279                l= &&
 280                if test "$use_local_hardlink" = yes
 281                then
 282                        # See if we can hardlink and drop "l" if not.
 283                        sample_file=$(cd "$repo" && \
 284                                      find objects -type f -print | sed -e 1q)
 285                        # objects directory should not be empty because
 286                        # we are cloning!
 287                        test -f "$repo/$sample_file" || exit
 288                        if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 289                        then
 290                                rm -f "$GIT_DIR/objects/sample"
 291                                l=l
 292                        elif test -n "$local_explicitly_asked_for"
 293                        then
 294                                echo >&2 "Warning: -l asked but cannot hardlink to $repo"
 295                        fi
 296                fi &&
 297                cd "$repo" &&
 298                find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 299        fi
 300        git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 301        ;;
 302*)
 303        case "$repo" in
 304        rsync://*)
 305                case "$depth" in
 306                "") ;;
 307                *) die "shallow over rsync not supported" ;;
 308                esac
 309                rsync $quiet -av --ignore-existing  \
 310                        --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 311                exit
 312                # Look at objects/info/alternates for rsync -- http will
 313                # support it natively and git native ones will do it on the
 314                # remote end.  Not having that file is not a crime.
 315                rsync -q "$repo/objects/info/alternates" \
 316                        "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 317                        rm -f "$GIT_DIR/TMP_ALT"
 318                if test -f "$GIT_DIR/TMP_ALT"
 319                then
 320                    ( cd "$D" &&
 321                      . git-parse-remote &&
 322                      resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 323                    while read alt
 324                    do
 325                        case "$alt" in 'bad alternate: '*) die "$alt";; esac
 326                        case "$quiet" in
 327                        '')     echo >&2 "Getting alternate: $alt" ;;
 328                        esac
 329                        rsync $quiet -av --ignore-existing  \
 330                            --exclude info "$alt" "$GIT_DIR/objects" || exit
 331                    done
 332                    rm -f "$GIT_DIR/TMP_ALT"
 333                fi
 334                git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 335                ;;
 336        https://*|http://*|ftp://*)
 337                case "$depth" in
 338                "") ;;
 339                *) die "shallow over http or ftp not supported" ;;
 340                esac
 341                if test -z "@@NO_CURL@@"
 342                then
 343                        clone_dumb_http "$repo" "$D"
 344                else
 345                        die "http transport not supported, rebuild Git with curl support"
 346                fi
 347                ;;
 348        *)
 349                case "$upload_pack" in
 350                '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
 351                *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
 352                esac >"$GIT_DIR/CLONE_HEAD" ||
 353                        die "fetch-pack from '$repo' failed."
 354                ;;
 355        esac
 356        ;;
 357esac
 358test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 359
 360if test -f "$GIT_DIR/CLONE_HEAD"
 361then
 362        # Read git-fetch-pack -k output and store the remote branches.
 363        if [ -n "$use_separate_remote" ]
 364        then
 365                branch_top="remotes/$origin"
 366        else
 367                branch_top="heads"
 368        fi
 369        tag_top="tags"
 370        while read sha1 name
 371        do
 372                case "$name" in
 373                *'^{}')
 374                        continue ;;
 375                HEAD)
 376                        destname="REMOTE_HEAD" ;;
 377                refs/heads/*)
 378                        destname="refs/$branch_top/${name#refs/heads/}" ;;
 379                refs/tags/*)
 380                        destname="refs/$tag_top/${name#refs/tags/}" ;;
 381                *)
 382                        continue ;;
 383                esac
 384                git update-ref -m "clone: from $repo" "$destname" "$sha1" ""
 385        done < "$GIT_DIR/CLONE_HEAD"
 386fi
 387
 388if test -n "$W"; then
 389        cd "$W" || exit
 390else
 391        cd "$D" || exit
 392fi
 393
 394if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 395then
 396        # a non-bare repository is always in separate-remote layout
 397        remote_top="refs/remotes/$origin"
 398        head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 399        case "$head_sha1" in
 400        'ref: refs/'*)
 401                # Uh-oh, the remote told us (http transport done against
 402                # new style repository with a symref HEAD).
 403                # Ideally we should skip the guesswork but for now
 404                # opt for minimum change.
 405                head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 406                head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 407                ;;
 408        esac
 409
 410        # The name under $remote_top the remote HEAD seems to point at.
 411        head_points_at=$(
 412                (
 413                        test -f "$GIT_DIR/$remote_top/master" && echo "master"
 414                        cd "$GIT_DIR/$remote_top" &&
 415                        find . -type f -print | sed -e 's/^\.\///'
 416                ) | (
 417                done=f
 418                while read name
 419                do
 420                        test t = $done && continue
 421                        branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 422                        if test "$head_sha1" = "$branch_tip"
 423                        then
 424                                echo "$name"
 425                                done=t
 426                        fi
 427                done
 428                )
 429        )
 430
 431        # Upstream URL
 432        git config remote."$origin".url "$repo" &&
 433
 434        # Set up the mappings to track the remote branches.
 435        git config remote."$origin".fetch \
 436                "+refs/heads/*:$remote_top/*" '^$' &&
 437
 438        # Write out remote.$origin config, and update our "$head_points_at".
 439        case "$head_points_at" in
 440        ?*)
 441                # Local default branch
 442                git symbolic-ref HEAD "refs/heads/$head_points_at" &&
 443
 444                # Tracking branch for the primary branch at the remote.
 445                git update-ref HEAD "$head_sha1" &&
 446
 447                rm -f "refs/remotes/$origin/HEAD"
 448                git symbolic-ref "refs/remotes/$origin/HEAD" \
 449                        "refs/remotes/$origin/$head_points_at" &&
 450
 451                git config branch."$head_points_at".remote "$origin" &&
 452                git config branch."$head_points_at".merge "refs/heads/$head_points_at"
 453                ;;
 454        '')
 455                # Source had detached HEAD pointing nowhere
 456                git update-ref --no-deref HEAD "$head_sha1" &&
 457                rm -f "refs/remotes/$origin/HEAD"
 458                ;;
 459        esac
 460
 461        case "$no_checkout" in
 462        '')
 463                test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
 464                git read-tree -m -u $v HEAD HEAD
 465        esac
 466fi
 467rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 468
 469trap - 0