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