[thirdparty/git.git] / git-fetch.sh

#!/bin/sh
#

USAGE='<fetch-options> <repository> <refspec>...'
SUBDIRECTORY_OK=Yes
. git-sh-setup
set_reflog_action "fetch $*"
cd_to_toplevel ;# probably unnecessary...

. git-parse-remote
_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"

LF='
'
IFS="$LF"

no_tags=
tags=
append=
force=
verbose=
update_head_ok=
exec=
keep=
shallow_depth=
while case "$#" in 0) break ;; esac
do
	case "$1" in
	-a|--a|--ap|--app|--appe|--appen|--append)
		append=t
		;;
	--upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
	--upload-pa|--upload-pac|--upload-pack)
		shift
		exec="--upload-pack=$1"
		;;
	--upl=*|--uplo=*|--uploa=*|--upload=*|\
	--upload-=*|--upload-p=*|--upload-pa=*|--upload-pac=*|--upload-pack=*)
		exec=--upload-pack=$(expr "$1" : '-[^=]*=\(.*\)')
		shift
		;;
	-f|--f|--fo|--for|--forc|--force)
		force=t
		;;
	-t|--t|--ta|--tag|--tags)
		tags=t
		;;
	-n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
		no_tags=t
		;;
	-u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
	--update-he|--update-hea|--update-head|--update-head-|\
	--update-head-o|--update-head-ok)
		update_head_ok=t
		;;
	-v|--verbose)
		verbose=Yes
		;;
	-k|--k|--ke|--kee|--keep)
		keep='-k -k'
		;;
	--depth=*)
		shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
		;;
	--depth)
		shift
		shallow_depth="--depth=$1"
		;;
	-*)
		usage
		;;
	*)
		break
		;;
	esac
	shift
done

case "$#" in
0)
	origin=$(get_default_remote)
	test -n "$(get_remote_url ${origin})" ||
		die "Where do you want to fetch from today?"
	set x $origin ; shift ;;
esac

if test -z "$exec"
then
	# No command line override and we have configuration for the remote.
	exec="--upload-pack=$(get_uploadpack $1)"
fi

remote_nick="$1"
remote=$(get_remote_url "$@")
refs=
rref=
rsync_slurped_objects=

if test "" = "$append"
then
	: >"$GIT_DIR/FETCH_HEAD"
fi

# Global that is reused later
ls_remote_result=$(git ls-remote $exec "$remote") ||
	die "Cannot get the repository state from $remote"

append_fetch_head () {
    head_="$1"
    remote_="$2"
    remote_name_="$3"
    remote_nick_="$4"
    local_name_="$5"
    case "$6" in
    t) not_for_merge_='not-for-merge' ;;
    '') not_for_merge_= ;;
    esac

    # remote-nick is the URL given on the command line (or a shorthand)
    # remote-name is the $GIT_DIR relative refs/ path we computed
    # for this refspec.

    # the $note_ variable will be fed to git-fmt-merge-msg for further
    # processing.
    case "$remote_name_" in
    HEAD)
	note_= ;;
    refs/heads/*)
	note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
	note_="branch '$note_' of " ;;
    refs/tags/*)
	note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
	note_="tag '$note_' of " ;;
    refs/remotes/*)
	note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
	note_="remote branch '$note_' of " ;;
    *)
	note_="$remote_name of " ;;
    esac
    remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
	remote_="$remote_1_"
    note_="$note_$remote_"

    # 2.6.11-tree tag would not be happy to be fed to resolve.
    if git-cat-file commit "$head_" >/dev/null 2>&1
    then
	headc_=$(git-rev-parse --verify "$head_^0") || exit
	echo "$headc_	$not_for_merge_	$note_" >>"$GIT_DIR/FETCH_HEAD"
    else
	echo "$head_	not-for-merge	$note_" >>"$GIT_DIR/FETCH_HEAD"
    fi

    update_local_ref "$local_name_" "$head_" "$note_"
}

update_local_ref () {
    # If we are storing the head locally make sure that it is
    # a fast forward (aka "reverse push").

    label_=$(git-cat-file -t $2)
    newshort_=$(git-rev-parse --short $2)
    if test -z "$1" ; then
	[ "$verbose" ] && echo >&2 "* fetched $3"
	[ "$verbose" ] && echo >&2 "  $label_: $newshort_"
	return 0
    fi
    oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)

    case "$1" in
    refs/tags/*)
	# Tags need not be pointing at commits so there
	# is no way to guarantee "fast-forward" anyway.
	if test -n "$oldshort_"
	then
		if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
		then
			[ "$verbose" ] && echo >&2 "* $1: same as $3"
			[ "$verbose" ] && echo >&2 "  $label_: $newshort_" ||:
		else
			echo >&2 "* $1: updating with $3"
			echo >&2 "  $label_: $newshort_"
			git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
		fi
	else
		echo >&2 "* $1: storing $3"
		echo >&2 "  $label_: $newshort_"
		git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
	fi
	;;

    refs/heads/* | refs/remotes/*)
	# $1 is the ref being updated.
	# $2 is the new value for the ref.
	local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
	if test "$local"
	then
	    # Require fast-forward.
	    mb=$(git-merge-base "$local" "$2") &&
	    case "$2,$mb" in
	    $local,*)
	        if test -n "$verbose"
		then
			echo >&2 "* $1: same as $3"
			echo >&2 "  $label_: $newshort_"
		fi
		;;
	    *,$local)
		echo >&2 "* $1: fast forward to $3"
		echo >&2 "  old..new: $oldshort_..$newshort_"
		git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
		;;
	    *)
		false
		;;
	    esac || {
		case ",$force,$single_force," in
		*,t,*)
			echo >&2 "* $1: forcing update to non-fast forward $3"
			echo >&2 "  old...new: $oldshort_...$newshort_"
			git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
			;;
		*)
			echo >&2 "* $1: not updating to non-fast forward $3"
			echo >&2 "  old...new: $oldshort_...$newshort_"
			exit 1
			;;
		esac
	    }
	else
	    echo >&2 "* $1: storing $3"
	    echo >&2 "  $label_: $newshort_"
	    git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
	fi
	;;
    esac
}

# updating the current HEAD with git-fetch in a bare
# repository is always fine.
if test -z "$update_head_ok" && test $(is_bare_repository) = false
then
	orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
fi

# If --tags (and later --heads or --all) is specified, then we are
# not talking about defaults stored in Pull: line of remotes or
# branches file, and just fetch those and refspecs explicitly given.
# Otherwise we do what we always did.

reflist=$(get_remote_refs_for_fetch "$@")
if test "$tags"
then
	taglist=`IFS='	' &&
		  echo "$ls_remote_result" |
	          while read sha1 name
		  do
			case "$sha1" in
			fail)
				exit 1
			esac
			case "$name" in
			*^*) continue ;;
			refs/tags/*) ;;
			*) continue ;;
			esac
		  	if git-check-ref-format "$name"
			then
			    echo ".${name}:${name}"
			else
			    echo >&2 "warning: tag ${name} ignored"
			fi
		  done` || exit
	if test "$#" -gt 1
	then
		# remote URL plus explicit refspecs; we need to merge them.
		reflist="$reflist$LF$taglist"
	else
		# No explicit refspecs; fetch tags only.
		reflist=$taglist
	fi
fi

fetch_main () {
  reflist="$1"
  refs=
  rref=

  for ref in $reflist
  do
      refs="$refs$LF$ref"

      # These are relative path from $GIT_DIR, typically starting at refs/
      # but may be HEAD
      if expr "z$ref" : 'z\.' >/dev/null
      then
	  not_for_merge=t
	  ref=$(expr "z$ref" : 'z\.\(.*\)')
      else
	  not_for_merge=
      fi
      if expr "z$ref" : 'z+' >/dev/null
      then
	  single_force=t
	  ref=$(expr "z$ref" : 'z+\(.*\)')
      else
	  single_force=
      fi
      remote_name=$(expr "z$ref" : 'z\([^:]*\):')
      local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')

      rref="$rref$LF$remote_name"

      # There are transports that can fetch only one head at a time...
      case "$remote" in
      http://* | https://* | ftp://*)
	  test -n "$shallow_depth" &&
		die "shallow clone with http not supported"
	  proto=`expr "$remote" : '\([^:]*\):'`
	  if [ -n "$GIT_SSL_NO_VERIFY" ]; then
	      curl_extra_args="-k"
	  fi
	  if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
		"`git-repo-config --bool http.noEPSV`" = true ]; then
	      noepsv_opt="--disable-epsv"
	  fi

	  # Find $remote_name from ls-remote output.
	  head=$(
		IFS='	'
		echo "$ls_remote_result" |
		while read sha1 name
		do
			test "z$name" = "z$remote_name" || continue
			echo "$sha1"
			break
		done
	  )
	  expr "z$head" : "z$_x40\$" >/dev/null ||
		die "No such ref $remote_name at $remote"
	  echo >&2 "Fetching $remote_name from $remote using $proto"
	  git-http-fetch -v -a "$head" "$remote/" || exit
	  ;;
      rsync://*)
	  test -n "$shallow_depth" &&
		die "shallow clone with rsync not supported"
	  TMP_HEAD="$GIT_DIR/TMP_HEAD"
	  rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
	  head=$(git-rev-parse --verify TMP_HEAD)
	  rm -f "$TMP_HEAD"
	  test "$rsync_slurped_objects" || {
	      rsync -av --ignore-existing --exclude info \
		  "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit

	      # Look at objects/info/alternates for rsync -- http will
	      # support it natively and git native ones will do it on
	      # the remote end.  Not having that file is not a crime.
	      rsync -q "$remote/objects/info/alternates" \
		  "$GIT_DIR/TMP_ALT" 2>/dev/null ||
		  rm -f "$GIT_DIR/TMP_ALT"
	      if test -f "$GIT_DIR/TMP_ALT"
	      then
		  resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
		  while read alt
		  do
		      case "$alt" in 'bad alternate: '*) die "$alt";; esac
		      echo >&2 "Getting alternate: $alt"
		      rsync -av --ignore-existing --exclude info \
		      "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
		  done
		  rm -f "$GIT_DIR/TMP_ALT"
	      fi
	      rsync_slurped_objects=t
	  }
	  ;;
      *)
	  # We will do git native transport with just one call later.
	  continue ;;
      esac

      append_fetch_head "$head" "$remote" \
	  "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit

  done

  case "$remote" in
  http://* | https://* | ftp://* | rsync://* )
      ;; # we are already done.
  *)
    ( : subshell because we muck with IFS
      IFS=" 	$LF"
      (
	  git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
	  echo failed "$remote"
      ) |
      (
	trap '
		if test -n "$keepfile" && test -f "$keepfile"
		then
			rm -f "$keepfile"
		fi
	' 0

        keepfile=
	while read sha1 remote_name
	do
	  case "$sha1" in
	  failed)
		  echo >&2 "Fetch failure: $remote"
		  exit 1 ;;
	  # special line coming from index-pack with the pack name
	  pack)
		  continue ;;
	  keep)
		  keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
		  continue ;;
	  esac
	  found=
	  single_force=
	  for ref in $refs
	  do
	      case "$ref" in
	      +$remote_name:*)
		  single_force=t
		  not_for_merge=
		  found="$ref"
		  break ;;
	      .+$remote_name:*)
		  single_force=t
		  not_for_merge=t
		  found="$ref"
		  break ;;
	      .$remote_name:*)
		  not_for_merge=t
		  found="$ref"
		  break ;;
	      $remote_name:*)
		  not_for_merge=
		  found="$ref"
		  break ;;
	      esac
	  done
	  local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
	  append_fetch_head "$sha1" "$remote" \
		  "$remote_name" "$remote_nick" "$local_name" \
		  "$not_for_merge" || exit
        done
      )
    ) || exit ;;
  esac

}

fetch_main "$reflist" || exit

# automated tag following
case "$no_tags$tags" in
'')
	case "$reflist" in
	*:refs/*)
		# effective only when we are following remote branch
		# using local tracking branch.
		taglist=$(IFS='	' &&
		echo "$ls_remote_result" |
		git-show-ref --exclude-existing=refs/tags/ |
		while read sha1 name
		do
			git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
			echo >&2 "Auto-following $name"
			echo ".${name}:${name}"
		done)
	esac
	case "$taglist" in
	'') ;;
	?*)
		# do not deepen a shallow tree when following tags
		shallow_depth=
		fetch_main "$taglist" || exit ;;
	esac
esac

# If the original head was empty (i.e. no "master" yet), or
# if we were told not to worry, we do not have to check.
case "$orig_head" in
'')
	;;
?*)
	curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
	if test "$curr_head" != "$orig_head"
	then
	    git-update-ref \
			-m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
			HEAD "$orig_head"
		die "Cannot fetch into the current branch."
	fi
	;;
esac
Commit	Line	Data
7ef76925 LT	1	#!/bin/sh
7ef76925 LT	2	#
87358b7a FK	3
87358b7a FK	4	USAGE='<fetch-options> <repository> <refspec>...'
4da90285	5	SUBDIRECTORY_OK=Yes
ae2b0f15	6	. git-sh-setup
f9474132	7	set_reflog_action "fetch $*"
514c09fd	8	cd_to_toplevel ;# probably unnecessary...
f9474132	9
215a7ad1	10	. git-parse-remote
853a3697 JH	11	_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
	12	_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
	13
221e743c JH	14	LF='
	15	'
	16	IFS="$LF"
	17
03febf99	18	no_tags=
ed1aadf1	19	tags=
853a3697	20	append=
ae2da406	21	force=
583122cd	22	verbose=
b10ac50f	23	update_head_ok=
2c620a1a	24	exec=
920ccbfc	25	keep=
f53514bc	26	shallow_depth=
ae2da406 JH	27	while case "$#" in 0) break ;; esac
	28	do
	29	case "$1" in
	30	-a\|--a\|--ap\|--app\|--appe\|--appen\|--append)
	31	append=t
ae2da406	32	;;
2796a9de JH	33	--upl\|--uplo\|--uploa\|--upload\|--upload-\|--upload-p\|\
2796a9de JH	34	--upload-pa\|--upload-pac\|--upload-pack)
2c620a1a	35	shift
ae1dffcb JH	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 "$1" : '-[^=]=\(.\)')
	41	shift
2c620a1a	42	;;
ae2da406 JH	43	-f\|--f\|--fo\|--for\|--forc\|--force)
ae2da406 JH	44	force=t
b10ac50f	45	;;
ed1aadf1 LT	46	-t\|--t\|--ta\|--tag\|--tags)
	47	tags=t
	48	;;
03febf99 JH	49	-n\|--n\|--no\|--no-\|--no-t\|--no-ta\|--no-tag\|--no-tags)
	50	no_tags=t
	51	;;
b10ac50f JH	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
ae2da406	56	;;
583122cd LT	57	-v\|--verbose)
	58	verbose=Yes
	59	;;
0f76f526	60	-k\|--k\|--ke\|--kee\|--keep)
576162a4	61	keep='-k -k'
0f76f526	62	;;
f53514bc JS	63	--depth=*)
	64	shallow_depth="--depth=`expr "z$1" : 'z-[^=]=\(.\)'`"
	65	;;
	66	--depth)
	67	shift
	68	shallow_depth="--depth=$1"
	69	;;
87358b7a FK	70	-*)
	71	usage
	72	;;
ae2da406 JH	73	*)
	74	break
	75	;;
	76	esac
b10ac50f	77	shift
ae2da406 JH	78	done
ae2da406 JH	79
853a3697 JH	80	case "$#" in
853a3697 JH	81	0)
648ad18f SB	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 $origin ; shift ;;
853a3697	86	esac
ae2da406	87
5dee29ac UKK	88	if test -z "$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
853a3697 JH	94	remote_nick="$1"
	95	remote=$(get_remote_url "$@")
	96	refs=
	97	rref=
	98	rsync_slurped_objects=
	99
	100	if test "" = "$append"
	101	then
df34297a	102	: >"$GIT_DIR/FETCH_HEAD"
853a3697 JH	103	fi
853a3697 JH	104
28b8e61f	105	# Global that is reused later
ae1dffcb	106	ls_remote_result=$(git ls-remote $exec "$remote") \|\|
b3d98993	107	die "Cannot get the repository state from $remote"
28b8e61f	108
853a3697 JH	109	append_fetch_head () {
	110	head_="$1"
	111	remote_="$2"
	112	remote_name_="$3"
	113	remote_nick_="$4"
	114	local_name_="$5"
05dd8e2e JH	115	case "$6" in
	116	t) not_for_merge_='not-for-merge' ;;
	117	'') not_for_merge_= ;;
	118	esac
853a3697	119
06ec2b4b JH	120	# remote-nick is the URL given on the command line (or a shorthand)
	121	# remote-name is the $GIT_DIR relative refs/ path we computed
	122	# for this refspec.
687b8be8 EW	123
	124	# the $note_ variable will be fed to git-fmt-merge-msg for further
	125	# processing.
06ec2b4b JH	126	case "$remote_name_" in
	127	HEAD)
	128	note_= ;;
	129	refs/heads/*)
	130	note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
b91fb518	131	note_="branch '$note_' of " ;;
06ec2b4b JH	132	refs/tags/*)
06ec2b4b JH	133	note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
b91fb518	134	note_="tag '$note_' of " ;;
687b8be8 EW	135	refs/remotes/*)
	136	note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
	137	note_="remote branch '$note_' of " ;;
06ec2b4b	138	*)
b91fb518	139	note_="$remote_name of " ;;
06ec2b4b	140	esac
f327dbce	141	remote_1_=$(expr "z$remote_" : 'z\(.\)\.git/$') &&
b91fb518 JH	142	remote_="$remote_1_"
b91fb518 JH	143	note_="$note_$remote_"
06ec2b4b	144
853a3697 JH	145	# 2.6.11-tree tag would not be happy to be fed to resolve.
	146	if git-cat-file commit "$head_" >/dev/null 2>&1
	147	then
8572aa85	148	headc_=$(git-rev-parse --verify "$head_^0") \|\| exit
df34297a	149	echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
853a3697	150	else
df34297a	151	echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
853a3697	152	fi
20a3847d SB	153
20a3847d SB	154	update_local_ref "$local_name_" "$head_" "$note_"
853a3697 JH	155	}
853a3697 JH	156
20a3847d SB	157	update_local_ref () {
	158	# If we are storing the head locally make sure that it is
	159	# a fast forward (aka "reverse push").
	160
	161	label_=$(git-cat-file -t $2)
	162	newshort_=$(git-rev-parse --short $2)
	163	if test -z "$1" ; then
	164	[ "$verbose" ] && echo >&2 "* fetched $3"
	165	[ "$verbose" ] && echo >&2 " $label_: $newshort_"
	166	return 0
	167	fi
fbc72799 JH	168	oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
fbc72799 JH	169
853a3697 JH	170	case "$1" in
	171	refs/tags/*)
	172	# Tags need not be pointing at commits so there
	173	# is no way to guarantee "fast-forward" anyway.
fbc72799	174	if test -n "$oldshort_"
ae2da406	175	then
fbc72799	176	if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
f8765797	177	then
20a3847d SB	178	[ "$verbose" ] && echo >&2 "* $1: same as $3"
20a3847d SB	179	[ "$verbose" ] && echo >&2 " $label_: $newshort_" \|\|:
f8765797 JH	180	else
f8765797 JH	181	echo >&2 "* $1: updating with $3"
20a3847d	182	echo >&2 " $label_: $newshort_"
f9474132	183	git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
f8765797	184	fi
ae2da406	185	else
06ec2b4b	186	echo >&2 "* $1: storing $3"
20a3847d	187	echo >&2 " $label_: $newshort_"
f9474132	188	git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
ae2da406	189	fi
bf7960eb	190	;;
ae2da406	191
687b8be8	192	refs/heads/* \| refs/remotes/*)
bf7960eb JH	193	# $1 is the ref being updated.
	194	# $2 is the new value for the ref.
	195	local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
	196	if test "$local"
33b83034	197	then
bf7960eb	198	# Require fast-forward.
853a3697 JH	199	mb=$(git-merge-base "$local" "$2") &&
	200	case "$2,$mb" in
	201	$local,*)
ea5aeb07 JH	202	if test -n "$verbose"
	203	then
	204	echo >&2 "* $1: same as $3"
20a3847d	205	echo >&2 " $label_: $newshort_"
ea5aeb07	206	fi
853a3697 JH	207	;;
853a3697 JH	208	*,$local)
06ec2b4b	209	echo >&2 "* $1: fast forward to $3"
20a3847d	210	echo >&2 " old..new: $oldshort_..$newshort_"
f9474132	211	git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
853a3697 JH	212	;;
	213	*)
	214	false
	215	;;
	216	esac \|\| {
bf7960eb JH	217	case ",$force,$single_force," in
bf7960eb JH	218	,t,)
20a3847d SB	219	echo >&2 "* $1: forcing update to non-fast forward $3"
20a3847d SB	220	echo >&2 " old...new: $oldshort_...$newshort_"
f9474132	221	git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
ae2da406 JH	222	;;
ae2da406 JH	223	*)
20a3847d SB	224	echo >&2 "* $1: not updating to non-fast forward $3"
20a3847d SB	225	echo >&2 " old...new: $oldshort_...$newshort_"
a9698bb2	226	exit 1
ae2da406 JH	227	;;
ae2da406 JH	228	esac
853a3697 JH	229	}
853a3697 JH	230	else
bf7960eb	231	echo >&2 "* $1: storing $3"
20a3847d	232	echo >&2 " $label_: $newshort_"
f9474132	233	git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
33b83034	234	fi
0a623e7c	235	;;
853a3697 JH	236	esac
	237	}
	238
4b441f47 JH	239	# updating the current HEAD with git-fetch in a bare
	240	# repository is always fine.
	241	if test -z "$update_head_ok" && test $(is_bare_repository) = false
	242	then
bf7960eb	243	orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
4b441f47	244	fi
b10ac50f	245
ed1aadf1 LT	246	# If --tags (and later --heads or --all) is specified, then we are
	247	# not talking about defaults stored in Pull: line of remotes or
	248	# branches file, and just fetch those and refspecs explicitly given.
	249	# Otherwise we do what we always did.
	250
	251	reflist=$(get_remote_refs_for_fetch "$@")
	252	if test "$tags"
	253	then
ed9f7c95	254	taglist=`IFS=' ' &&
28b8e61f	255	echo "$ls_remote_result" \|
81214e4d JH	256	while read sha1 name
81214e4d JH	257	do
57a39690 JH	258	case "$sha1" in
	259	fail)
	260	exit 1
	261	esac
81214e4d	262	case "$name" in
878ccb26	263	^) continue ;;
28b8e61f JH	264	refs/tags/*) ;;
28b8e61f JH	265	*) continue ;;
81214e4d JH	266	esac
	267	if git-check-ref-format "$name"
	268	then
	269	echo ".${name}:${name}"
	270	else
	271	echo >&2 "warning: tag ${name} ignored"
	272	fi
57a39690	273	done` \|\| exit
ed1aadf1 LT	274	if test "$#" -gt 1
	275	then
	276	# remote URL plus explicit refspecs; we need to merge them.
221e743c	277	reflist="$reflist$LF$taglist"
ed1aadf1 LT	278	else
	279	# No explicit refspecs; fetch tags only.
	280	reflist=$taglist
	281	fi
	282	fi
	283
03febf99 JH	284	fetch_main () {
	285	reflist="$1"
	286	refs=
4839bd8a	287	rref=
f170e4b3	288
03febf99 JH	289	for ref in $reflist
	290	do
	291	refs="$refs$LF$ref"
f170e4b3	292
03febf99 JH	293	# These are relative path from $GIT_DIR, typically starting at refs/
03febf99 JH	294	# but may be HEAD
f327dbce	295	if expr "z$ref" : 'z\.' >/dev/null
03febf99 JH	296	then
03febf99 JH	297	not_for_merge=t
f327dbce	298	ref=$(expr "z$ref" : 'z\.\(.*\)')
03febf99 JH	299	else
	300	not_for_merge=
	301	fi
dfdcb558	302	if expr "z$ref" : 'z+' >/dev/null
03febf99 JH	303	then
03febf99 JH	304	single_force=t
dfdcb558	305	ref=$(expr "z$ref" : 'z+\(.*\)')
03febf99 JH	306	else
	307	single_force=
	308	fi
f327dbce MW	309	remote_name=$(expr "z$ref" : 'z\([^:]*\):')
f327dbce MW	310	local_name=$(expr "z$ref" : 'z[^:]:\(.\)')
853a3697	311
03febf99	312	rref="$rref$LF$remote_name"
4447badc	313
03febf99 JH	314	# There are transports that can fetch only one head at a time...
03febf99 JH	315	case "$remote" in
38529e28	316	http://* \| https://* \| ftp://*)
f53514bc JS	317	test -n "$shallow_depth" &&
f53514bc JS	318	die "shallow clone with http not supported"
ddaf7314	319	proto=`expr "$remote" : '\([^:]*\):'`
03febf99 JH	320	if [ -n "$GIT_SSL_NO_VERIFY" ]; then
	321	curl_extra_args="-k"
	322	fi
3ea099d4 SK	323	if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
	324	"`git-repo-config --bool http.noEPSV`" = true ]; then
	325	noepsv_opt="--disable-epsv"
	326	fi
2986c022 JH	327
	328	# Find $remote_name from ls-remote output.
	329	head=$(
	330	IFS=' '
	331	echo "$ls_remote_result" \|
	332	while read sha1 name
	333	do
	334	test "z$name" = "z$remote_name" \|\| continue
	335	echo "$sha1"
	336	break
	337	done
	338	)
f327dbce	339	expr "z$head" : "z$_x40\$" >/dev/null \|\|
2986c022	340	die "No such ref $remote_name at $remote"
ddaf7314	341	echo >&2 "Fetching $remote_name from $remote using $proto"
03febf99 JH	342	git-http-fetch -v -a "$head" "$remote/" \|\| exit
	343	;;
	344	rsync://*)
f53514bc JS	345	test -n "$shallow_depth" &&
f53514bc JS	346	die "shallow clone with rsync not supported"
03febf99 JH	347	TMP_HEAD="$GIT_DIR/TMP_HEAD"
	348	rsync -L -q "$remote/$remote_name" "$TMP_HEAD" \|\| exit 1
	349	head=$(git-rev-parse --verify TMP_HEAD)
	350	rm -f "$TMP_HEAD"
	351	test "$rsync_slurped_objects" \|\| {
	352	rsync -av --ignore-existing --exclude info \
	353	"$remote/objects/" "$GIT_OBJECT_DIRECTORY/" \|\| exit
853a3697	354
03febf99 JH	355	# Look at objects/info/alternates for rsync -- http will
	356	# support it natively and git native ones will do it on
	357	# the remote end. Not having that file is not a crime.
	358	rsync -q "$remote/objects/info/alternates" \
	359	"$GIT_DIR/TMP_ALT" 2>/dev/null \|\|
	360	rm -f "$GIT_DIR/TMP_ALT"
	361	if test -f "$GIT_DIR/TMP_ALT"
	362	then
	363	resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" \|
	364	while read alt
	365	do
	366	case "$alt" in 'bad alternate: '*) die "$alt";; esac
	367	echo >&2 "Getting alternate: $alt"
	368	rsync -av --ignore-existing --exclude info \
	369	"$alt" "$GIT_OBJECT_DIRECTORY/" \|\| exit
	370	done
	371	rm -f "$GIT_DIR/TMP_ALT"
	372	fi
	373	rsync_slurped_objects=t
	374	}
	375	;;
	376	*)
	377	# We will do git native transport with just one call later.
	378	continue ;;
	379	esac
f170e4b3	380
03febf99	381	append_fetch_head "$head" "$remote" \
f64d7fd2	382	"$remote_name" "$remote_nick" "$local_name" "$not_for_merge" \|\| exit
853a3697	383
03febf99 JH	384	done
	385
	386	case "$remote" in
38529e28	387	http://* \| https://* \| ftp://* \| rsync://* )
03febf99 JH	388	;; # we are already done.
	389	*)
	390	( : subshell because we muck with IFS
	391	IFS=" $LF"
	392	(
ac9c1108 JH	393	git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref \|\|
ac9c1108 JH	394	echo failed "$remote"
03febf99	395	) \|
ac9c1108 JH	396	(
	397	trap '
	398	if test -n "$keepfile" && test -f "$keepfile"
	399	then
	400	rm -f "$keepfile"
	401	fi
	402	' 0
	403
	404	keepfile=
	405	while read sha1 remote_name
	406	do
03febf99 JH	407	case "$sha1" in
	408	failed)
	409	echo >&2 "Fetch failure: $remote"
	410	exit 1 ;;
576162a4 NP	411	# special line coming from index-pack with the pack name
	412	pack)
	413	continue ;;
	414	keep)
ac9c1108	415	keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
576162a4	416	continue ;;
03febf99 JH	417	esac
	418	found=
	419	single_force=
	420	for ref in $refs
	421	do
	422	case "$ref" in
	423	+$remote_name:*)
	424	single_force=t
	425	not_for_merge=
	426	found="$ref"
	427	break ;;
	428	.+$remote_name:*)
	429	single_force=t
	430	not_for_merge=t
	431	found="$ref"
	432	break ;;
	433	.$remote_name:*)
	434	not_for_merge=t
	435	found="$ref"
	436	break ;;
	437	$remote_name:*)
	438	not_for_merge=
	439	found="$ref"
	440	break ;;
	441	esac
	442	done
f327dbce	443	local_name=$(expr "z$found" : 'z[^:]:\(.\)')
03febf99	444	append_fetch_head "$sha1" "$remote" \
f64d7fd2 JH	445	"$remote_name" "$remote_nick" "$local_name" \
f64d7fd2 JH	446	"$not_for_merge" \|\| exit
ac9c1108 JH	447	done
ac9c1108 JH	448	)
03febf99 JH	449	) \|\| exit ;;
	450	esac
	451
	452	}
	453
f64d7fd2	454	fetch_main "$reflist" \|\| exit
03febf99 JH	455
	456	# automated tag following
	457	case "$no_tags$tags" in
	458	'')
6dc78e69 JH	459	case "$reflist" in
	460	:refs/)
	461	# effective only when we are following remote branch
	462	# using local tracking branch.
ed9f7c95	463	taglist=$(IFS=' ' &&
28b8e61f	464	echo "$ls_remote_result" \|
ed9f7c95	465	git-show-ref --exclude-existing=refs/tags/ \|
6dc78e69 JH	466	while read sha1 name
6dc78e69 JH	467	do
6dc78e69 JH	468	git-cat-file -t "$sha1" >/dev/null 2>&1 \|\| continue
	469	echo >&2 "Auto-following $name"
	470	echo ".${name}:${name}"
	471	done)
	472	esac
03febf99 JH	473	case "$taglist" in
	474	'') ;;
	475	?*)
d1586315 AJ	476	# do not deepen a shallow tree when following tags
d1586315 AJ	477	shallow_depth=
f64d7fd2	478	fetch_main "$taglist" \|\| exit ;;
03febf99	479	esac
853a3697	480	esac
b10ac50f JH	481
	482	# If the original head was empty (i.e. no "master" yet), or
	483	# if we were told not to worry, we do not have to check.
9861718b JH	484	case "$orig_head" in
9861718b JH	485	'')
b10ac50f	486	;;
9861718b	487	?*)
bf7960eb	488	curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
b10ac50f JH	489	if test "$curr_head" != "$orig_head"
b10ac50f JH	490	then
55b7835e	491	git-update-ref \
f9474132	492	-m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
55b7835e	493	HEAD "$orig_head"
b10ac50f JH	494	die "Cannot fetch into the current branch."
	495	fi
	496	;;
	497	esac