From 313ee0d69f58c2bf2f4e0a62b812c9d08a39b240 Mon Sep 17 00:00:00 2001 From: Nicolas Morey-Chaisemartin Date: Wed, 30 Mar 2011 07:20:02 +0200 Subject: submodule: process conflicting submodules only once During a merge module_list returns conflicting submodules several times (stage 1,2,3) which caused the submodules to be used multiple times in git submodule init, sync, update and status command. There are 5 callers of module_list; they all read (mode, sha1, stage, path) tuple, and most of them care only about path. As a first level approximation, it should be Ok (in the sense that it does not make things worse than it currently is) to filter the duplicate paths from module_list output, but some callers should change their behaviour when the merge in the superproject still has conflicts. Notice the higher-stage entries, and emit only one record from module_list, but while doing so, mark the entry with "U" (not [0-3]) in the $stage field and null out the SHA-1 part, as the object name for the lowest stage does not give any useful information to the caller, and this way any caller that uses the object name would hopefully barf. Then update the codepaths for each subcommands this way: - "update" should not touch the submodule repository, because we do not know what commit should be checked out yet. - "status" reports the conflicting submodules as 'U000...000' and does not recurse into them (we might later want to make it recurse). - The command called by "foreach" may want to do whatever it wants to do by noticing the merged status in the superproject itself, so feed the path to it from module_list as before, but only once per submodule. - "init" and "sync" are unlikely things to do while the superproject is still not merged, but as long as a submodule is there in $path, there is no point skipping it. It might however want to take the merged status of .gitmodules into account, but that is outside of the scope of this topic. Acked-by: Jens Lehmann Thanks-to: Junio C Hamano Signed-off-by: Nicolas Morey-Chaisemartin Signed-off-by: Junio C Hamano diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt index 1ed331c..e8ed2f2 100644 --- a/Documentation/git-submodule.txt +++ b/Documentation/git-submodule.txt @@ -101,9 +101,10 @@ status:: currently checked out commit for each submodule, along with the submodule path and the output of 'git describe' for the SHA-1. Each SHA-1 will be prefixed with `-` if the submodule is not - initialized and `+` if the currently checked out submodule commit + initialized, `+` if the currently checked out submodule commit does not match the SHA-1 found in the index of the containing - repository. This command is the default command for 'git submodule'. + repository and `U` if the submodule has merge conflicts. + This command is the default command for 'git submodule'. + If '--recursive' is specified, this command will recurse into nested submodules, and show their status as well. diff --git a/git-submodule.sh b/git-submodule.sh index 3a13397..7f6b3cf 100755 --- a/git-submodule.sh +++ b/git-submodule.sh @@ -72,7 +72,24 @@ resolve_relative_url () # module_list() { - git ls-files --error-unmatch --stage -- "$@" | sane_grep '^160000 ' + git ls-files --error-unmatch --stage -- "$@" | + perl -e ' + my %unmerged = (); + my ($null_sha1) = ("0" x 40); + while () { + chomp; + my ($mode, $sha1, $stage, $path) = + /^([0-7]+) ([0-9a-f]{40}) ([0-3])\t(.*)$/; + next unless $mode eq "160000"; + if ($stage ne "0") { + if (!$unmerged{$path}++) { + print "$mode $null_sha1 U\t$path\n"; + } + next; + } + print "$_\n"; + } + ' } # @@ -427,6 +444,11 @@ cmd_update() module_list "$@" | while read mode sha1 stage path do + if test "$stage" = U + then + echo >&2 "Skipping unmerged submodule $path" + continue + fi name=$(module_name "$path") || exit url=$(git config submodule."$name".url) update_module=$(git config submodule."$name".update) @@ -770,6 +792,11 @@ cmd_status() name=$(module_name "$path") || exit url=$(git config submodule."$name".url) displaypath="$prefix$path" + if test "$stage" = U + then + say "U$sha1 $displaypath" + continue + fi if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git then say "-$sha1 $displaypath" diff --git a/t/t7405-submodule-merge.sh b/t/t7405-submodule-merge.sh index 7e2e258..a8fb30b 100755 --- a/t/t7405-submodule-merge.sh +++ b/t/t7405-submodule-merge.sh @@ -56,11 +56,11 @@ test_expect_success setup ' # History setup # -# b -# / \ -# a d -# \ / -# c +# b +# / \ +# init -- a d +# \ \ / +# g c # # a in the main repository records to sub-a in the submodule and # analogous b and c. d should be automatically found by merging c into @@ -76,6 +76,8 @@ test_expect_success 'setup for merge search' ' git add file-a && git commit -m "sub-a" && git branch sub-a) && + git commit --allow-empty -m init && + git branch init && git add sub && git commit -m "a" && git branch a && @@ -101,7 +103,13 @@ test_expect_success 'setup for merge search' ' git checkout -b sub-d sub-b && git merge sub-c) && git commit -a -m "d" && - git branch test b) + git branch test b && + + git checkout -b g init && + (cd sub && + git checkout -b sub-g sub-c) && + git add sub && + git commit -a -m "g") ' test_expect_success 'merge with one side as a fast-forward of the other' ' @@ -176,6 +184,44 @@ test_expect_success 'merging should fail for changes that are backwards' ' test_must_fail git merge f) ' + +# Check that the conflicting submodule is detected when it is +# in the common ancestor. status should be 'U00...00" +test_expect_success 'git submodule status should display the merge conflict properly with merge base' ' + (cd merge-search && + cat >.gitmodules <expect < actual && + test_cmp expect actual && + git reset --hard) +' + +# Check that the conflicting submodule is detected when it is +# not in the common ancestor. status should be 'U00...00" +test_expect_success 'git submodule status should display the merge conflict properly without merge-base' ' + (cd merge-search && + git checkout -b test-no-merge-base g && + test_must_fail git merge b && + cat >.gitmodules <expect < actual && + test_cmp expect actual && + git reset --hard) +' + + test_expect_success 'merging with a modify/modify conflict between merge bases' ' git reset --hard HEAD && git checkout -b test2 c && -- cgit v0.10.2-6-g49f6