git-commit-vandalism/git-parse-remote.sh
Junio C Hamano fbc9012307 Do not merge random set of refs out of wildcarded refs
When your fetch configuration has only the wildcards, we would
pick the lexicographically first ref from the remote side for
merging, which was complete nonsense.  Make sure nothing except
the one that is specified with branch.*.merge is merged in this
case.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-31 18:53:26 -08:00

282 lines
6.2 KiB
Bash
Executable File

#!/bin/sh
# git-ls-remote could be called from outside a git managed repository;
# this would fail in that case and would issue an error message.
GIT_DIR=$(git-rev-parse --git-dir 2>/dev/null) || :;
get_data_source () {
case "$1" in
*/*)
echo ''
;;
*)
if test "$(git-repo-config --get "remote.$1.url")"
then
echo config
elif test -f "$GIT_DIR/remotes/$1"
then
echo remotes
elif test -f "$GIT_DIR/branches/$1"
then
echo branches
else
echo ''
fi ;;
esac
}
get_remote_url () {
data_source=$(get_data_source "$1")
case "$data_source" in
'')
echo "$1"
;;
config)
git-repo-config --get "remote.$1.url"
;;
remotes)
sed -ne '/^URL: */{
s///p
q
}' "$GIT_DIR/remotes/$1"
;;
branches)
sed -e 's/#.*//' "$GIT_DIR/branches/$1"
;;
*)
die "internal error: get-remote-url $1" ;;
esac
}
get_default_remote () {
curr_branch=$(git-symbolic-ref HEAD | sed -e 's|^refs/heads/||')
origin=$(git-repo-config --get "branch.$curr_branch.remote")
echo ${origin:-origin}
}
get_remote_default_refs_for_push () {
data_source=$(get_data_source "$1")
case "$data_source" in
'' | branches)
;; # no default push mapping, just send matching refs.
config)
git-repo-config --get-all "remote.$1.push" ;;
remotes)
sed -ne '/^Push: */{
s///p
}' "$GIT_DIR/remotes/$1" ;;
*)
die "internal error: get-remote-default-ref-for-push $1" ;;
esac
}
# Called from canon_refs_list_for_fetch -d "$remote", which
# is called from get_remote_default_refs_for_fetch to grok
# refspecs that are retrieved from the configuration, but not
# from get_remote_refs_for_fetch when it deals with refspecs
# supplied on the command line. $ls_remote_result has the list
# of refs available at remote.
#
# The first token returned is either "explicit" or "glob"; this
# is to help prevent randomly "globbed" ref from being chosen as
# a merge candidate
expand_refs_wildcard () {
first_one=yes
for ref
do
lref=${ref#'+'}
# a non glob pattern is given back as-is.
expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
if test -n "$first_one"
then
echo "explicit"
first_one=
fi
echo "$ref"
continue
}
# glob
if test -n "$first_one"
then
echo "glob"
first_one=
fi
from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
local_force=
test "z$lref" = "z$ref" || local_force='+'
echo "$ls_remote_result" |
sed -e '/\^{}$/d' |
(
IFS=' '
while read sha1 name
do
# ignore the ones that do not start with $from
mapped=${name#"$from"}
test "z$name" = "z$mapped" && continue
echo "${local_force}${name}:${to}${mapped}"
done
)
done
}
# Subroutine to canonicalize remote:local notation.
canon_refs_list_for_fetch () {
# If called from get_remote_default_refs_for_fetch
# leave the branches in branch.${curr_branch}.merge alone,
# or the first one otherwise; add prefix . to the rest
# to prevent the secondary branches to be merged by default.
merge_branches=
curr_branch=
if test "$1" = "-d"
then
shift ; remote="$1" ; shift
set $(expand_refs_wildcard "$@")
is_explicit="$1"
shift
if test "$remote" = "$(get_default_remote)"
then
curr_branch=$(git-symbolic-ref HEAD | \
sed -e 's|^refs/heads/||')
merge_branches=$(git-repo-config \
--get-all "branch.${curr_branch}.merge")
fi
if test -z "$merge_branches" && test $is_explicit != explicit
then
merge_branches=..this.will.never.match.any.ref..
fi
fi
for ref
do
force=
case "$ref" in
+*)
ref=$(expr "z$ref" : 'z+\(.*\)')
force=+
;;
esac
expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
remote=$(expr "z$ref" : 'z\([^:]*\):')
local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
dot_prefix=.
if test -z "$merge_branches"
then
merge_branches=$remote
dot_prefix=
else
for merge_branch in $merge_branches
do
if test "$remote" = "$merge_branch" ||
test "$local" = "$merge_branch"
then
dot_prefix=
break
fi
done
fi
case "$remote" in
'') remote=HEAD ;;
refs/heads/* | refs/tags/* | refs/remotes/*) ;;
heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
*) remote="refs/heads/$remote" ;;
esac
case "$local" in
'') local= ;;
refs/heads/* | refs/tags/* | refs/remotes/*) ;;
heads/* | tags/* | remotes/* ) local="refs/$local" ;;
*) local="refs/heads/$local" ;;
esac
if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
then
git-check-ref-format "$local_ref_name" ||
die "* refusing to create funny ref '$local_ref_name' locally"
fi
echo "${dot_prefix}${force}${remote}:${local}"
done
}
# Returns list of src: (no store), or src:dst (store)
get_remote_default_refs_for_fetch () {
data_source=$(get_data_source "$1")
case "$data_source" in
'')
echo "HEAD:" ;;
config)
canon_refs_list_for_fetch -d "$1" \
$(git-repo-config --get-all "remote.$1.fetch") ;;
branches)
remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
case "$remote_branch" in '') remote_branch=master ;; esac
echo "refs/heads/${remote_branch}:refs/heads/$1"
;;
remotes)
canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
s///p
}' "$GIT_DIR/remotes/$1")
;;
*)
die "internal error: get-remote-default-ref-for-push $1" ;;
esac
}
get_remote_refs_for_push () {
case "$#" in
0) die "internal error: get-remote-refs-for-push." ;;
1) get_remote_default_refs_for_push "$@" ;;
*) shift; echo "$@" ;;
esac
}
get_remote_refs_for_fetch () {
case "$#" in
0)
die "internal error: get-remote-refs-for-fetch." ;;
1)
get_remote_default_refs_for_fetch "$@" ;;
*)
shift
tag_just_seen=
for ref
do
if test "$tag_just_seen"
then
echo "refs/tags/${ref}:refs/tags/${ref}"
tag_just_seen=
continue
else
case "$ref" in
tag)
tag_just_seen=yes
continue
;;
esac
fi
canon_refs_list_for_fetch "$ref"
done
;;
esac
}
resolve_alternates () {
# original URL (xxx.git)
top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
while read path
do
case "$path" in
\#* | '')
continue ;;
/*)
echo "$top_$path/" ;;
../*)
# relative -- ugly but seems to work.
echo "$1/objects/$path/" ;;
*)
# exit code may not be caught by the reader.
echo "bad alternate: $path"
exit 1 ;;
esac
done
}