Kyle Meyer <kyle@xxxxxxxxxx> writes: > When the path given to 'git submodule add' is an existing repository > that is not in the index, the repository is passed to 'git add'. If > this repository doesn't have any commits, we don't get a useful > result: there is no subproject OID to track, and any untracked files > in the sub-repository are added to the current repository. > > Detect if the path is a repository with no commits and abort to avoid > getting into this state. Note that this check must come before the > 'git add --dry-run' check because an upcoming commit will make 'git > add' fail in this situation. OK, in short, in an already-populated repository, $ git init junk ;# there was no 'junk' subdirectory $ git add junk would have been a successful no-op, and after the above two commands, $ >junk/one $ git add junk would have added junk/one as a normal blob to the top-level project, ignoring the fact that the user wanted to eventually populate junk as a repository and add it as a submodule. You'll be teaching "git add" not to do so, and pay attention to the fact that junk/.git exists, even though junk/.git/HEAD is on an unborn branch. Which makes sense to me. > Signed-off-by: Kyle Meyer <kyle@xxxxxxxxxx> > --- > git-submodule.sh | 7 +++++++ > t/t7400-submodule-basic.sh | 11 ++++++++++- > 2 files changed, 17 insertions(+), 1 deletion(-) > > diff --git a/git-submodule.sh b/git-submodule.sh > index 514ede2596..5a9dc9bf7e 100755 > --- a/git-submodule.sh > +++ b/git-submodule.sh > @@ -231,6 +231,13 @@ cmd_add() > die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")" > fi > > + if test -d "$sm_path" && > + test -z $(git -C "$sm_path" rev-parse --show-cdup 2>/dev/null) > + then > + git -C "$sm_path" rev-parse --verify -q HEAD >/dev/null || > + die "$(eval_gettext "'\$sm_path' does not have any commits")" > + fi > + > if test -z "$force" && > ! git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" > /dev/null 2>&1 > then > diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh > index aba2d4d6ee..6adf640143 100755 > --- a/t/t7400-submodule-basic.sh > +++ b/t/t7400-submodule-basic.sh > @@ -46,6 +46,15 @@ test_expect_success 'submodule update aborts on missing gitmodules url' ' > test_must_fail git submodule init > ' > > +test_expect_success 'add aborts on repository with no commits' ' > + cat >expected <<-\EOF && > + '"'repo-no-commits'"' does not have any commits > + EOF > + git init repo-no-commits && > + test_must_fail git submodule add ../a ./repo-no-commits 2>actual && > + test_i18ncmp expected actual > +' > + > test_expect_success 'setup - repository in init subdirectory' ' > mkdir init && > ( > @@ -809,7 +818,7 @@ test_expect_success '../bar/a/b/c works with relative local path - ../foo/bar.gi > cp pristine-.git-config .git/config && > cp pristine-.gitmodules .gitmodules && > mkdir -p a/b/c && > - (cd a/b/c && git init) && > + (cd a/b/c && git init && test_commit msg) && > git config remote.origin.url ../foo/bar.git && > git submodule add ../bar/a/b/c ./a/b/c && > git submodule init &&
