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