git.oblomov.eu Git - git/blob - git-fetch.sh

   1 #!/bin/sh
   2 #
   3
   4 USAGE='<fetch-options> <repository> <refspec>...'
   5 SUBDIRECTORY_OK=Yes
   6 . git-sh-setup
   7 set_reflog_action "fetch $*"
   8 cd_to_toplevel ;# probably unnecessary...
   9
  10 . git-parse-remote
  11 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
  12 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
  13
  14 LF='
  15 '
  16 IFS="$LF"
  17
  18 no_tags=
  19 tags=
  20 append=
  21 force=
  22 verbose=
  23 update_head_ok=
  24 exec=
  25 keep=
  26 shallow_depth=
  27 while case "$#" in 0) break ;; esac
  28 do
  29         case "$1" in
  30         -a|--a|--ap|--app|--appe|--appen|--append)
  31                 append=t
  32                 ;;
  33         --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
  34         --upload-pa|--upload-pac|--upload-pack)
  35                 shift
  36                 exec="--upload-pack=$1"
  37                 ;;
  38         --upl=*|--uplo=*|--uploa=*|--upload=*|\
  39         --upload-=*|--upload-p=*|--upload-pa=*|--upload-pac=*|--upload-pack=*)
  40                 exec=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)')
  41                 shift
  42                 ;;
  43         -f|--f|--fo|--for|--forc|--force)
  44                 force=t
  45                 ;;
  46         -t|--t|--ta|--tag|--tags)
  47                 tags=t
  48                 ;;
  49         -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
  50                 no_tags=t
  51                 ;;
  52         -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
  53         --update-he|--update-hea|--update-head|--update-head-|\
  54         --update-head-o|--update-head-ok)
  55                 update_head_ok=t
  56                 ;;
  57         -v|--verbose)
  58                 verbose=Yes
  59                 ;;
  60         -k|--k|--ke|--kee|--keep)
  61                 keep='-k -k'
  62                 ;;
  63         --depth=*)
  64                 shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
  65                 ;;
  66         --depth)
  67                 shift
  68                 shallow_depth="--depth=$1"
  69                 ;;
  70         -*)
  71                 usage
  72                 ;;
  73         *)
  74                 break
  75                 ;;
  76         esac
  77         shift
  78 done
  79
  80 case "$#" in
  81 0)
  82         origin=$(get_default_remote)
  83         test -n "$(get_remote_url ${origin})" ||
  84                 die "Where do you want to fetch from today?"
  85         set x $origin ; shift ;;
  86 esac
  87
  88 if test -z "$exec"
  89 then
  90         # No command line override and we have configuration for the remote.
  91         exec="--upload-pack=$(get_uploadpack $1)"
  92 fi
  93
  94 remote_nick="$1"
  95 remote=$(get_remote_url "$@")
  96 refs=
  97 rref=
  98 rsync_slurped_objects=
  99
 100 if test "" = "$append"
 101 then
 102         : >"$GIT_DIR/FETCH_HEAD"
 103 fi
 104
 105 # Global that is reused later
 106 ls_remote_result=$(git ls-remote $exec "$remote") ||
 107         die "Cannot get the repository state from $remote"
 108
 109 append_fetch_head () {
 110         flags=
 111         test -n "$verbose" && flags="$flags -v"
 112         test -n "$force" && flags="$flags -f"
 113         GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
 114                 git-fetch--tool $flags append-fetch-head "$@"
 115 }
 116
 117 update_local_ref () {
 118         flags=
 119         test -n "$verbose" && flags="$flags -v"
 120         test -n "$force" && flags="$flags -f"
 121         GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
 122                 git-fetch--tool $flags update-local-ref "$@"
 123 }
 124
 125 # updating the current HEAD with git-fetch in a bare
 126 # repository is always fine.
 127 if test -z "$update_head_ok" && test $(is_bare_repository) = false
 128 then
 129         orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 130 fi
 131
 132 # Allow --notags from remote.$1.tagopt
 133 case "$tags$no_tags" in
 134 '')
 135         case "$(git-config --get "remote.$1.tagopt")" in
 136         --no-tags)
 137                 no_tags=t ;;
 138         esac
 139 esac
 140
 141 # If --tags (and later --heads or --all) is specified, then we are
 142 # not talking about defaults stored in Pull: line of remotes or
 143 # branches file, and just fetch those and refspecs explicitly given.
 144 # Otherwise we do what we always did.
 145
 146 reflist=$(get_remote_refs_for_fetch "$@")
 147 if test "$tags"
 148 then
 149         taglist=`IFS='  ' &&
 150                   echo "$ls_remote_result" |
 151                   git-show-ref --exclude-existing=refs/tags/ |
 152                   while read sha1 name
 153                   do
 154                         echo ".${name}:${name}"
 155                   done` || exit
 156         if test "$#" -gt 1
 157         then
 158                 # remote URL plus explicit refspecs; we need to merge them.
 159                 reflist="$reflist$LF$taglist"
 160         else
 161                 # No explicit refspecs; fetch tags only.
 162                 reflist=$taglist
 163         fi
 164 fi
 165
 166 fetch_native () {
 167
 168   eval=$(echo "$1" | git-fetch--tool parse-reflist "-")
 169   eval "$eval"
 170
 171     ( : subshell because we muck with IFS
 172       IFS="     $LF"
 173       (
 174           git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
 175           echo failed "$remote"
 176       ) |
 177       (
 178         flags=
 179         test -n "$verbose" && flags="$flags -v"
 180         test -n "$force" && flags="$flags -f"
 181         GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
 182                 git-fetch--tool $flags native-store \
 183                         "$remote" "$remote_nick" "$refs"
 184       )
 185     ) || exit
 186
 187 }
 188
 189 fetch_dumb () {
 190   reflist="$1"
 191   refs=
 192   rref=
 193
 194   for ref in $reflist
 195   do
 196       refs="$refs$LF$ref"
 197
 198       # These are relative path from $GIT_DIR, typically starting at refs/
 199       # but may be HEAD
 200       if expr "z$ref" : 'z\.' >/dev/null
 201       then
 202           not_for_merge=t
 203           ref=$(expr "z$ref" : 'z\.\(.*\)')
 204       else
 205           not_for_merge=
 206       fi
 207       if expr "z$ref" : 'z+' >/dev/null
 208       then
 209           single_force=t
 210           ref=$(expr "z$ref" : 'z+\(.*\)')
 211       else
 212           single_force=
 213       fi
 214       remote_name=$(expr "z$ref" : 'z\([^:]*\):')
 215       local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 216
 217       rref="$rref$LF$remote_name"
 218
 219       # There are transports that can fetch only one head at a time...
 220       case "$remote" in
 221       http://* | https://* | ftp://*)
 222           test -n "$shallow_depth" &&
 223                 die "shallow clone with http not supported"
 224           proto=`expr "$remote" : '\([^:]*\):'`
 225           if [ -n "$GIT_SSL_NO_VERIFY" ]; then
 226               curl_extra_args="-k"
 227           fi
 228           if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
 229                 "`git-config --bool http.noEPSV`" = true ]; then
 230               noepsv_opt="--disable-epsv"
 231           fi
 232
 233           # Find $remote_name from ls-remote output.
 234           head=$(
 235                 IFS='   '
 236                 echo "$ls_remote_result" |
 237                 while read sha1 name
 238                 do
 239                         test "z$name" = "z$remote_name" || continue
 240                         echo "$sha1"
 241                         break
 242                 done
 243           )
 244           expr "z$head" : "z$_x40\$" >/dev/null ||
 245                 die "No such ref $remote_name at $remote"
 246           echo >&2 "Fetching $remote_name from $remote using $proto"
 247           git-http-fetch -v -a "$head" "$remote/" || exit
 248           ;;
 249       rsync://*)
 250           test -n "$shallow_depth" &&
 251                 die "shallow clone with rsync not supported"
 252           TMP_HEAD="$GIT_DIR/TMP_HEAD"
 253           rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
 254           head=$(git-rev-parse --verify TMP_HEAD)
 255           rm -f "$TMP_HEAD"
 256           test "$rsync_slurped_objects" || {
 257               rsync -av --ignore-existing --exclude info \
 258                   "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
 259
 260               # Look at objects/info/alternates for rsync -- http will
 261               # support it natively and git native ones will do it on
 262               # the remote end.  Not having that file is not a crime.
 263               rsync -q "$remote/objects/info/alternates" \
 264                   "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 265                   rm -f "$GIT_DIR/TMP_ALT"
 266               if test -f "$GIT_DIR/TMP_ALT"
 267               then
 268                   resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
 269                   while read alt
 270                   do
 271                       case "$alt" in 'bad alternate: '*) die "$alt";; esac
 272                       echo >&2 "Getting alternate: $alt"
 273                       rsync -av --ignore-existing --exclude info \
 274                       "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
 275                   done
 276                   rm -f "$GIT_DIR/TMP_ALT"
 277               fi
 278               rsync_slurped_objects=t
 279           }
 280           ;;
 281       esac
 282
 283       append_fetch_head "$head" "$remote" \
 284           "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
 285
 286   done
 287
 288 }
 289
 290 fetch_main () {
 291         case "$remote" in
 292         http://* | https://* | ftp://* | rsync://* )
 293                 fetch_dumb "$@"
 294                 ;;
 295         *)
 296                 fetch_native "$@"
 297                 ;;
 298         esac
 299 }
 300
 301 fetch_main "$reflist" || exit
 302
 303 # automated tag following
 304 case "$no_tags$tags" in
 305 '')
 306         case "$reflist" in
 307         *:refs/*)
 308                 # effective only when we are following remote branch
 309                 # using local tracking branch.
 310                 taglist=$(IFS=' ' &&
 311                 echo "$ls_remote_result" |
 312                 git-show-ref --exclude-existing=refs/tags/ |
 313                 while read sha1 name
 314                 do
 315                         git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
 316                         echo >&2 "Auto-following $name"
 317                         echo ".${name}:${name}"
 318                 done)
 319         esac
 320         case "$taglist" in
 321         '') ;;
 322         ?*)
 323                 # do not deepen a shallow tree when following tags
 324                 shallow_depth=
 325                 fetch_main "$taglist" || exit ;;
 326         esac
 327 esac
 328
 329 # If the original head was empty (i.e. no "master" yet), or
 330 # if we were told not to worry, we do not have to check.
 331 case "$orig_head" in
 332 '')
 333         ;;
 334 ?*)
 335         curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 336         if test "$curr_head" != "$orig_head"
 337         then
 338             git-update-ref \
 339                         -m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
 340                         HEAD "$orig_head"
 341                 die "Cannot fetch into the current branch."
 342         fi
 343         ;;
 344 esac