git-clone.sh

   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.
   9 unset CDPATH
  10
  11 die() {
  12         echo >&2 "$@"
  13         exit 1
  14 }
  15
  16 usage() {
  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
  20 get_repo_base() {
  21         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  22 }
  23
  24 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  25     curl_extra_args="-k"
  26 fi
  27
  28 http_fetch () {
  29         # $1 = Remote, $2 = Local
  30         curl -nsfL $curl_extra_args "$1" >"$2"
  31 }
  32
  33 clone_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.
  44 Perhaps 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 "$GIT_DIR/REMOTE_HEAD"
  67 }
  68
  69 quiet=
  70 local=no
  71 use_local=no
  72 local_shared=no
  73 unset template
  74 no_checkout=
  75 upload_pack=
  76 bare=
  77 reference=
  78 origin=
  79 origin_override=
  80 use_separate_remote=t
  81 depth=
  82 no_progress=
  83 test -t 1 || no_progress=--no-progress
  84 while
  85         case "$#,$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
 136 do
 137         shift
 138 done
 139
 140 repo="$1"
 141 test -n "$repo" ||
 142     die 'you must specify a repository to clone.'
 143
 144 # --bare implies --no-checkout and --no-separate-remote
 145 if test yes = "$bare"
 146 then
 147         if test yes = "$origin_override"
 148         then
 149                 die '--bare and --origin $origin options are incompatible.'
 150         fi
 151         no_checkout=yes
 152         use_separate_remote=
 153 fi
 154
 155 if test -z "$origin"
 156 then
 157         origin=origin
 158 fi
 159
 160 # Turn the source into an absolute path if
 161 # it is local
 162 if base=$(get_repo_base "$repo"); then
 163         repo="$base"
 164         local=yes
 165 fi
 166
 167 dir="$2"
 168 # Try using "humanish" part of source repo if user didn't specify one
 169 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 170 [ -e "$dir" ] && die "destination directory '$dir' already exists."
 171 mkdir -p "$dir" &&
 172 D=$(cd "$dir" && pwd) &&
 173 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 174 case "$bare" in
 175 yes)
 176         GIT_DIR="$D" ;;
 177 *)
 178         GIT_DIR="$D/.git" ;;
 179 esac && export GIT_DIR && git-init ${template+"$template"} || usage
 180
 181 if test -n "$reference"
 182 then
 183         ref_git=
 184         if test -d "$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 '$reference' is not a local directory."
 211         fi
 212 fi
 213
 214 rm -f "$GIT_DIR/CLONE_HEAD"
 215
 216 # We do local magic only when the user tells us to.
 217 case "$local,$use_local" in
 218 yes,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         ;;
 302 esac
 303 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 304
 305 if test -f "$GIT_DIR/CLONE_HEAD"
 306 then
 307         # Read git-fetch-pack -k output and store the remote branches.
 308         if [ -n "$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"
 331 fi
 332
 333 cd "$D" || exit
 334
 335 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 336 then
 337         # a non-bare repository is always in separate-remote layout
 338         remote_top="refs/remotes/$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 $v HEAD HEAD
 400         esac
 401 fi
 402 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 403
 404 trap - 0
 405