git/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 -W`" &&
  23                 cd "$1" || cd "$1.git" &&
  24                 {
  25                         cd .git
  26                         pwd -W
  27                 }
  28         ) 2>/dev/null
  29 }
  30
  31 if [ -n "$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 [ yes = "$bare" ] && unset GIT_WORK_TREE
 191 [ -n "$GIT_WORK_TREE" ] && [ -e "$GIT_WORK_TREE" ] &&
 192 die "working tree '$GIT_WORK_TREE' already exists."
 193 D=
 194 W=
 195 cleanup() {
 196         err=$?
 197         test -z "$D" && rm -rf "$dir"
 198         test -z "$W" && test -n "$GIT_WORK_TREE" && rm -rf "$GIT_WORK_TREE"
 199         cd ..
 200         test -n "$D" && rm -rf "$D"
 201         test -n "$W" && rm -rf "$W"
 202         exit $err
 203 }
 204 trap cleanup 0
 205 mkdir -p "$dir" && D=$(cd "$dir" && pwd) || usage
 206 test -n "$GIT_WORK_TREE" && mkdir -p "$GIT_WORK_TREE" &&
 207 W=$(cd "$GIT_WORK_TREE" && pwd) && export GIT_WORK_TREE="$W"
 208 if test yes = "$bare" || test -n "$GIT_WORK_TREE"; then
 209         GIT_DIR="$D"
 210 else
 211         GIT_DIR="$D/.git"
 212 fi &&
 213 export GIT_DIR &&
 214 git-init $quiet ${template+"$template"} || usage
 215
 216 if test -n "$reference"
 217 then
 218         ref_git=
 219         if test -d "$reference"
 220         then
 221                 if test -d "$reference/.git/objects"
 222                 then
 223                         ref_git="$reference/.git"
 224                 elif test -d "$reference/objects"
 225                 then
 226                         ref_git="$reference"
 227                 fi
 228         fi
 229         if test -n "$ref_git"
 230         then
 231                 ref_git=$(cd "$ref_git" && pwd)
 232                 echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
 233                 (
 234                         GIT_DIR="$ref_git" git for-each-ref \
 235                                 --format='%(objectname) %(*objectname)'
 236                 ) |
 237                 while read a b
 238                 do
 239                         test -z "$a" ||
 240                         git update-ref "refs/reference-tmp/$a" "$a"
 241                         test -z "$b" ||
 242                         git update-ref "refs/reference-tmp/$b" "$b"
 243                 done
 244         else
 245                 die "reference repository '$reference' is not a local directory."
 246         fi
 247 fi
 248
 249 rm -f "$GIT_DIR/CLONE_HEAD"
 250
 251 # We do local magic only when the user tells us to.
 252 case "$local,$use_local" in
 253 yes,yes)
 254         ( cd "$repo/objects" ) ||
 255                 die "-l flag seen but repository '$repo' is not local."
 256
 257         case "$local_shared" in
 258         no)
 259             # See if we can hardlink and drop "l" if not.
 260             sample_file=$(cd "$repo" && \
 261                           /usr/bin/find objects -type f -print | sed -e 1q)
 262
 263             # objects directory should not be empty since we are cloning!
 264             test -f "$repo/$sample_file" || exit
 265
 266             l=
 267             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 268             then
 269                     l=l
 270             fi &&
 271             rm -f "$GIT_DIR/objects/sample" &&
 272             cd "$repo" &&
 273             /usr/bin/find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 274             ;;
 275         yes)
 276             mkdir -p "$GIT_DIR/objects/info"
 277             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 278             ;;
 279         esac
 280         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 281         ;;
 282 *)
 283         case "$repo" in
 284         rsync://*)
 285                 case "$depth" in
 286                 "") ;;
 287                 *) die "shallow over rsync not supported" ;;
 288                 esac
 289                 rsync $quiet -av --ignore-existing  \
 290                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 291                 exit
 292                 # Look at objects/info/alternates for rsync -- http will
 293                 # support it natively and git native ones will do it on the
 294                 # remote end.  Not having that file is not a crime.
 295                 rsync -q "$repo/objects/info/alternates" \
 296                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 297                         rm -f "$GIT_DIR/TMP_ALT"
 298                 if test -f "$GIT_DIR/TMP_ALT"
 299                 then
 300                     ( cd "$D" &&
 301                       . git-parse-remote &&
 302                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 303                     while read alt
 304                     do
 305                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 306                         case "$quiet" in
 307                         '')     echo >&2 "Getting alternate: $alt" ;;
 308                         esac
 309                         rsync $quiet -av --ignore-existing  \
 310                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 311                     done
 312                     rm -f "$GIT_DIR/TMP_ALT"
 313                 fi
 314                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 315                 ;;
 316         https://*|http://*|ftp://*)
 317                 case "$depth" in
 318                 "") ;;
 319                 *) die "shallow over http or ftp not supported" ;;
 320                 esac
 321                 if test -z "@@NO_CURL@@"
 322                 then
 323                         clone_dumb_http "$repo" "$D"
 324                 else
 325                         die "http transport not supported, rebuild Git with curl support"
 326                 fi
 327                 ;;
 328         *)
 329                 case "$upload_pack" in
 330                 '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
 331                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
 332                 esac >"$GIT_DIR/CLONE_HEAD" ||
 333                         die "fetch-pack from '$repo' failed."
 334                 ;;
 335         esac
 336         ;;
 337 esac
 338 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 339
 340 if test -f "$GIT_DIR/CLONE_HEAD"
 341 then
 342         # Read git-fetch-pack -k output and store the remote branches.
 343         if [ -n "$use_separate_remote" ]
 344         then
 345                 branch_top="remotes/$origin"
 346         else
 347                 branch_top="heads"
 348         fi
 349         tag_top="tags"
 350         while read sha1 name
 351         do
 352                 case "$name" in
 353                 *'^{}')
 354                         continue ;;
 355                 HEAD)
 356                         destname="REMOTE_HEAD" ;;
 357                 refs/heads/*)
 358                         destname="refs/$branch_top/${name#refs/heads/}" ;;
 359                 refs/tags/*)
 360                         destname="refs/$tag_top/${name#refs/tags/}" ;;
 361                 *)
 362                         continue ;;
 363                 esac
 364                 git update-ref -m "clone: from $repo" "$destname" "$sha1" ""
 365         done < "$GIT_DIR/CLONE_HEAD"
 366 fi
 367
 368 if test -n "$W"; then
 369         cd "$W" || exit
 370 else
 371         cd "$D" || exit
 372 fi
 373
 374 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 375 then
 376         # a non-bare repository is always in separate-remote layout
 377         remote_top="refs/remotes/$origin"
 378         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 379         case "$head_sha1" in
 380         'ref: refs/'*)
 381                 # Uh-oh, the remote told us (http transport done against
 382                 # new style repository with a symref HEAD).
 383                 # Ideally we should skip the guesswork but for now
 384                 # opt for minimum change.
 385                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 386                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 387                 ;;
 388         esac
 389
 390         # The name under $remote_top the remote HEAD seems to point at.
 391         head_points_at=$(
 392                 (
 393                         test -f "$GIT_DIR/$remote_top/master" && echo "master"
 394                         cd "$GIT_DIR/$remote_top" &&
 395                         /usr/bin/find . -type f -print | sed -e 's/^\.\///'
 396                 ) | (
 397                 done=f
 398                 while read name
 399                 do
 400                         test t = $done && continue
 401                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 402                         if test "$head_sha1" = "$branch_tip"
 403                         then
 404                                 echo "$name"
 405                                 done=t
 406                         fi
 407                 done
 408                 )
 409         )
 410
 411         # Upstream URL
 412         git config remote."$origin".url "$repo" &&
 413
 414         # Set up the mappings to track the remote branches.
 415         git config remote."$origin".fetch \
 416                 "+refs/heads/*:$remote_top/*" '^$' &&
 417
 418         # Write out remote.$origin config, and update our "$head_points_at".
 419         case "$head_points_at" in
 420         ?*)
 421                 # Local default branch
 422                 git symbolic-ref HEAD "refs/heads/$head_points_at" &&
 423
 424                 # Tracking branch for the primary branch at the remote.
 425                 git update-ref HEAD "$head_sha1" &&
 426
 427                 rm -f "refs/remotes/$origin/HEAD"
 428                 git symbolic-ref "refs/remotes/$origin/HEAD" \
 429                         "refs/remotes/$origin/$head_points_at" &&
 430
 431                 git config branch."$head_points_at".remote "$origin" &&
 432                 git config branch."$head_points_at".merge "refs/heads/$head_points_at"
 433                 ;;
 434         '')
 435                 # Source had detached HEAD pointing nowhere
 436                 git update-ref --no-deref HEAD "$head_sha1" &&
 437                 rm -f "refs/remotes/$origin/HEAD"
 438                 ;;
 439         esac
 440
 441         case "$no_checkout" in
 442         '')
 443                 test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
 444                 git read-tree -m -u $v HEAD HEAD
 445         esac
 446 fi
 447 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 448
 449 trap - 0