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