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