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#!/bin/sh
#
. git-sh-setup || die "Not a git archive"
. 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"
append=
force=
update_head_ok=
while case "$#" in 0) break ;; esac
do
case "$1" in
-a|--a|--ap|--app|--appe|--appen|--append)
append=t
;;
-f|--f|--fo|--for|--forc|--force)
force=t
;;
-u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
--update-he|--update-hea|--update-head|--update-head-|\
--update-head-o|--update-head-ok)
update_head_ok=t
;;
*)
break
;;
esac
shift
done
case "$#" in
0)
test -f "$GIT_DIR/branches/origin" ||
test -f "$GIT_DIR/remotes/origin" ||
die "Where do you want to fetch from today?"
set origin ;;
esac
remote_nick="$1"
remote=$(get_remote_url "$@")
refs=
rref=
rsync_slurped_objects=
if test "" = "$append"
then
: >$GIT_DIR/FETCH_HEAD
fi
append_fetch_head () {
head_="$1"
remote_="$2"
remote_name_="$3"
remote_nick_="$4"
local_name_="$5"
# remote-nick is the URL given on the command line (or a shorthand)
# remote-name is the $GIT_DIR relative refs/ path we computed
# for this refspec.
case "$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 '$note_' of " ;;
*)
note_="$remote_name of " ;;
esac
remote_1_=$(expr "$remote_" : '\(.*\)\.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_ $note_" >>$GIT_DIR/FETCH_HEAD
echo >&2 "* committish: $head_"
echo >&2 " $note_"
else
echo >&2 "* non-commit: $head_"
echo >&2 " $note_"
fi
if test "$local_name_" != ""
then
# We are storing the head locally. Make sure that it is
# a fast forward (aka "reverse push").
fast_forward_local "$local_name_" "$head_" "$note_"
fi
}
fast_forward_local () {
mkdir -p "$(dirname "$GIT_DIR/$1")"
case "$1" in
refs/tags/*)
# Tags need not be pointing at commits so there
# is no way to guarantee "fast-forward" anyway.
if test -f "$GIT_DIR/$1"
then
echo >&2 "* $1: updating with $3"
else
echo >&2 "* $1: storing $3"
fi
echo "$2" >"$GIT_DIR/$1" ;;
refs/heads/*)
# NEEDSWORK: use the same cmpxchg protocol here.
echo "$2" >"$GIT_DIR/$1.lock"
if test -f "$GIT_DIR/$1"
then
local=$(git-rev-parse --verify "$1^0") &&
mb=$(git-merge-base "$local" "$2") &&
case "$2,$mb" in
$local,*)
echo >&2 "* $1: same as $3"
;;
*,$local)
echo >&2 "* $1: fast forward to $3"
;;
*)
false
;;
esac || {
echo >&2 "* $1: does not fast forward to $3;"
case "$force,$single_force" in
t,* | *,t)
echo >&2 " forcing update."
;;
*)
mv "$GIT_DIR/$1.lock" "$GIT_DIR/$1.remote"
echo >&2 " leaving it in '$1.remote'"
;;
esac
}
else
echo >&2 "* $1: storing $3"
fi
test -f "$GIT_DIR/$1.lock" &&
mv "$GIT_DIR/$1.lock" "$GIT_DIR/$1"
;;
esac
}
case "$update_head_ok" in
'')
orig_head=$(cat "$GIT_DIR/HEAD" 2>/dev/null)
;;
esac
for ref in $(get_remote_refs_for_fetch "$@")
do
refs="$refs $ref"
# These are relative path from $GIT_DIR, typically starting at refs/
# but may be HEAD
if expr "$ref" : '\+' >/dev/null
then
single_force=t
ref=$(expr "$ref" : '\+\(.*\)')
else
single_force=
fi
remote_name=$(expr "$ref" : '\([^:]*\):')
local_name=$(expr "$ref" : '[^:]*:\(.*\)')
rref="$rref $remote_name"
# There are transports that can fetch only one head at a time...
case "$remote" in
http://* | https://*)
if [ -n "$GIT_SSL_NO_VERIFY" ]; then
curl_extra_args="-k"
fi
head=$(curl -nsf $curl_extra_args "$remote/$remote_name") &&
expr "$head" : "$_x40\$" >/dev/null ||
die "Failed to fetch $remote_name from $remote"
echo Fetching "$remote_name from $remote" using http
git-http-fetch -v -a "$head" "$remote/" || exit
;;
rsync://*)
TMP_HEAD="$GIT_DIR/TMP_HEAD"
rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
head=$(git-rev-parse 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" "$local_name"
done
case "$remote" in
http://* | https://* | rsync://* )
;; # we are already done.
*)
(
git-fetch-pack "$remote" $rref || echo failed "$remote"
) |
while read sha1 remote_name
do
case "$sha1" in
failed)
echo >&2 "Fetch failure: $remote"
exit 1 ;;
esac
found=
single_force=
for ref in $refs
do
case "$ref" in
+$remote_name:*)
single_force=t
found="$ref"
break ;;
$remote_name:*)
found="$ref"
break ;;
esac
done
local_name=$(expr "$found" : '[^:]*:\(.*\)')
append_fetch_head "$sha1" "$remote" "$remote_name" "$remote_nick" "$local_name"
done || exit
;;
esac
# If the original head was empty (i.e. no "master" yet), or
# if we were told not to worry, we do not have to check.
case ",$update_head_ok,$orig_head," in
*,, | t,* )
;;
*)
curr_head=$(cat "$GIT_DIR/HEAD" 2>/dev/null)
if test "$curr_head" != "$orig_head"
then
echo "$orig_head" >$GIT_DIR/HEAD
die "Cannot fetch into the current branch."
fi
;;
esac
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