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submodule: refuse to add repository with no commits 

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 a commit checked out, we don't get a
useful result: there is no subproject OID to track, and any untracked
files in the sub-repository are added as blobs in the top-level
repository.

To avoid getting into this state, abort if the path is a repository
that doesn't have a commit checked out.  Note that this check must
come before the 'git add --dry-run' check because the next commit will
make 'git add' fail when given a repository that doesn't have a commit
checked out.

Signed-off-by: Kyle Meyer <kyle@kyleam.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Kyle Meyer 2019-04-09 19:07:35 -04:00 committed by Junio C Hamano
parent aeb582a983
commit e13811189b
2 changed files with 17 additions and 1 deletions
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7
git-submodule.sh
View File

@ -230,6 +230,13 @@ 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 a commit checked out")"
fi
if test -z "$force" &&
! git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" > /dev/null 2>&1
then

11
t/t7400-submodule-basic.sh
View File

@ -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 >expect <<-\EOF &&
'"'repo-no-commits'"' does not have a commit checked out
EOF
git init repo-no-commits &&
test_must_fail git submodule add ../a ./repo-no-commits 2>actual &&
test_i18ncmp expect 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 &&