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-rw-r--r--t/lib-submodule-update.sh1101
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diff --git a/t/lib-submodule-update.sh b/t/lib-submodule-update.sh
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+# Create a submodule layout used for all tests below.
+#
+# The following use cases are covered:
+# - New submodule (no_submodule => add_sub1)
+# - Removed submodule (add_sub1 => remove_sub1)
+# - Updated submodule (add_sub1 => modify_sub1)
+# - Updated submodule recursively (add_nested_sub => modify_sub1_recursively)
+# - Submodule updated to invalid commit (add_sub1 => invalid_sub1)
+# - Submodule updated from invalid commit (invalid_sub1 => valid_sub1)
+# - Submodule replaced by tracked files in directory (add_sub1 =>
+# replace_sub1_with_directory)
+# - Directory containing tracked files replaced by submodule
+# (replace_sub1_with_directory => replace_directory_with_sub1)
+# - Submodule replaced by tracked file with the same name (add_sub1 =>
+# replace_sub1_with_file)
+# - Tracked file replaced by submodule (replace_sub1_with_file =>
+# replace_file_with_sub1)
+#
+# ----O
+# / ^
+# / remove_sub1
+# /
+# add_sub1 /-------O---------O--------O modify_sub1_recursively
+# | / ^ add_nested_sub
+# | / modify_sub1
+# v/
+# O------O-----------O---------O
+# ^ \ ^ replace_directory_with_sub1
+# | \ replace_sub1_with_directory
+# no_submodule \
+# --------O---------O
+# \ ^ replace_file_with_sub1
+# \ replace_sub1_with_file
+# \
+# ----O---------O
+# ^ valid_sub1
+# invalid_sub1
+#
+
+create_lib_submodule_repo () {
+ git init submodule_update_sub1 &&
+ (
+ cd submodule_update_sub1 &&
+ echo "expect" >>.gitignore &&
+ echo "actual" >>.gitignore &&
+ echo "x" >file1 &&
+ echo "y" >file2 &&
+ git add .gitignore file1 file2 &&
+ git commit -m "Base inside first submodule" &&
+ git branch "no_submodule"
+ ) &&
+ git init submodule_update_sub2 &&
+ (
+ cd submodule_update_sub2
+ echo "expect" >>.gitignore &&
+ echo "actual" >>.gitignore &&
+ echo "x" >file1 &&
+ echo "y" >file2 &&
+ git add .gitignore file1 file2 &&
+ git commit -m "nested submodule base" &&
+ git branch "no_submodule"
+ ) &&
+ git init submodule_update_repo &&
+ (
+ cd submodule_update_repo &&
+ branch=$(git symbolic-ref --short HEAD) &&
+ echo "expect" >>.gitignore &&
+ echo "actual" >>.gitignore &&
+ echo "x" >file1 &&
+ echo "y" >file2 &&
+ git add .gitignore file1 file2 &&
+ git commit -m "Base" &&
+ git branch "no_submodule" &&
+
+ git checkout -b "add_sub1" &&
+ git submodule add ../submodule_update_sub1 sub1 &&
+ git submodule add ../submodule_update_sub1 uninitialized_sub &&
+ git config -f .gitmodules submodule.sub1.ignore all &&
+ git config submodule.sub1.ignore all &&
+ git add .gitmodules &&
+ git commit -m "Add sub1" &&
+
+ git checkout -b remove_sub1 add_sub1 &&
+ git revert HEAD &&
+
+ git checkout -b modify_sub1 add_sub1 &&
+ git submodule update &&
+ (
+ cd sub1 &&
+ git fetch &&
+ git checkout -b "modifications" &&
+ echo "z" >file2 &&
+ echo "x" >file3 &&
+ git add file2 file3 &&
+ git commit -m "modified file2 and added file3" &&
+ git push origin modifications
+ ) &&
+ git add sub1 &&
+ git commit -m "Modify sub1" &&
+
+ git checkout -b add_nested_sub modify_sub1 &&
+ git -C sub1 checkout -b "add_nested_sub" &&
+ git -C sub1 submodule add --branch no_submodule ../submodule_update_sub2 sub2 &&
+ git -C sub1 commit -a -m "add a nested submodule" &&
+ git add sub1 &&
+ git commit -a -m "update submodule, that updates a nested submodule" &&
+ git checkout -b modify_sub1_recursively &&
+ git -C sub1 checkout -b modify_sub1_recursively &&
+ git -C sub1/sub2 checkout -b modify_sub1_recursively &&
+ echo change >sub1/sub2/file3 &&
+ git -C sub1/sub2 add file3 &&
+ git -C sub1/sub2 commit -m "make a change in nested sub" &&
+ git -C sub1 add sub2 &&
+ git -C sub1 commit -m "update nested sub" &&
+ git add sub1 &&
+ git commit -m "update sub1, that updates nested sub" &&
+ git -C sub1 push origin modify_sub1_recursively &&
+ git -C sub1/sub2 push origin modify_sub1_recursively &&
+ git -C sub1 submodule deinit -f --all &&
+
+ git checkout -b replace_sub1_with_directory add_sub1 &&
+ git submodule update &&
+ git -C sub1 checkout modifications &&
+ git rm --cached sub1 &&
+ rm sub1/.git* &&
+ git config -f .gitmodules --remove-section "submodule.sub1" &&
+ git add .gitmodules sub1/* &&
+ git commit -m "Replace sub1 with directory" &&
+
+ git checkout -b replace_directory_with_sub1 &&
+ git revert HEAD &&
+
+ git checkout -b replace_sub1_with_file add_sub1 &&
+ git rm sub1 &&
+ echo "content" >sub1 &&
+ git add sub1 &&
+ git commit -m "Replace sub1 with file" &&
+
+ git checkout -b replace_file_with_sub1 &&
+ git revert HEAD &&
+
+ git checkout -b invalid_sub1 add_sub1 &&
+ git update-index --cacheinfo 160000 $(test_oid numeric) sub1 &&
+ git commit -m "Invalid sub1 commit" &&
+ git checkout -b valid_sub1 &&
+ git revert HEAD &&
+
+ git checkout "$branch"
+ )
+}
+
+# Helper function to replace gitfile with .git directory
+replace_gitfile_with_git_dir () {
+ (
+ cd "$1" &&
+ git_dir="$(git rev-parse --git-dir)" &&
+ rm -f .git &&
+ cp -R "$git_dir" .git &&
+ GIT_WORK_TREE=. git config --unset core.worktree
+ )
+}
+
+# Test that the .git directory in the submodule is unchanged (except for the
+# core.worktree setting, which appears only in $GIT_DIR/modules/$1/config).
+# Call this function before test_submodule_content as the latter might
+# write the index file leading to false positive index differences.
+#
+# Note that this only supports submodules at the root level of the
+# superproject, with the default name, i.e. same as its path.
+test_git_directory_is_unchanged () {
+ (
+ cd ".git/modules/$1" &&
+ # does core.worktree point at the right place?
+ test "$(git config core.worktree)" = "../../../$1" &&
+ # remove it temporarily before comparing, as
+ # "$1/.git/config" lacks it...
+ git config --unset core.worktree
+ ) &&
+ diff -r ".git/modules/$1" "$1/.git" &&
+ (
+ # ... and then restore.
+ cd ".git/modules/$1" &&
+ git config core.worktree "../../../$1"
+ )
+}
+
+test_git_directory_exists () {
+ test -e ".git/modules/$1" &&
+ if test -f sub1/.git
+ then
+ # does core.worktree point at the right place?
+ test "$(git -C .git/modules/$1 config core.worktree)" = "../../../$1"
+ fi
+}
+
+# Helper function to be executed at the start of every test below, it sets up
+# the submodule repo if it doesn't exist and configures the most problematic
+# settings for diff.ignoreSubmodules.
+prolog () {
+ test_config_global protocol.file.allow always &&
+ (test -d submodule_update_repo || create_lib_submodule_repo) &&
+ test_config_global diff.ignoreSubmodules all &&
+ test_config diff.ignoreSubmodules all
+}
+
+# Helper function to bring work tree back into the state given by the
+# commit. This includes trying to populate sub1 accordingly if it exists and
+# should be updated to an existing commit.
+reset_work_tree_to () {
+ rm -rf submodule_update &&
+ git clone --template= submodule_update_repo submodule_update &&
+ (
+ cd submodule_update &&
+ rm -rf sub1 &&
+ git checkout -f "$1" &&
+ git status -u -s >actual &&
+ test_must_be_empty actual &&
+ hash=$(git rev-parse --revs-only HEAD:sub1) &&
+ if test -n "$hash" &&
+ test $(cd "../submodule_update_sub1" && git rev-parse --verify "$hash^{commit}")
+ then
+ git submodule update --init --recursive "sub1"
+ fi
+ )
+}
+
+reset_work_tree_to_interested () {
+ reset_work_tree_to $1 &&
+ # make the submodule git dirs available
+ if ! test -d submodule_update/.git/modules/sub1
+ then
+ mkdir -p submodule_update/.git/modules &&
+ cp -r submodule_update_repo/.git/modules/sub1 submodule_update/.git/modules/sub1
+ GIT_WORK_TREE=. git -C submodule_update/.git/modules/sub1 config --unset core.worktree
+ fi &&
+ if ! test -d submodule_update/.git/modules/sub1/modules/sub2
+ then
+ mkdir -p submodule_update/.git/modules/sub1/modules &&
+ cp -r submodule_update_repo/.git/modules/sub1/modules/sub2 submodule_update/.git/modules/sub1/modules/sub2
+ # core.worktree is unset for sub2 as it is not checked out
+ fi &&
+ # indicate we are interested in the submodule:
+ git -C submodule_update config submodule.sub1.url "bogus" &&
+ # sub1 might not be checked out, so use the git dir
+ git -C submodule_update/.git/modules/sub1 config submodule.sub2.url "bogus"
+}
+
+# Test that the superproject contains the content according to commit "$1"
+# (the work tree must match the index for everything but submodules but the
+# index must exactly match the given commit including any submodule SHA-1s).
+test_superproject_content () {
+ git diff-index --cached "$1" >actual &&
+ test_must_be_empty actual &&
+ git diff-files --ignore-submodules >actual &&
+ test_must_be_empty actual
+}
+
+# Test that the given submodule at path "$1" contains the content according
+# to the submodule commit recorded in the superproject's commit "$2"
+test_submodule_content () {
+ if test x"$1" = "x-C"
+ then
+ cd "$2"
+ shift; shift;
+ fi
+ if test $# != 2
+ then
+ echo "test_submodule_content needs two arguments"
+ return 1
+ fi &&
+ submodule="$1" &&
+ commit="$2" &&
+ test -d "$submodule"/ &&
+ if ! test -f "$submodule"/.git && ! test -d "$submodule"/.git
+ then
+ echo "Submodule $submodule is not populated"
+ return 1
+ fi &&
+ sha1=$(git rev-parse --verify "$commit:$submodule") &&
+ if test -z "$sha1"
+ then
+ echo "Couldn't retrieve SHA-1 of $submodule for $commit"
+ return 1
+ fi &&
+ (
+ cd "$submodule" &&
+ git status -u -s >actual &&
+ test_must_be_empty actual &&
+ git diff "$sha1" >actual &&
+ test_must_be_empty actual
+ )
+}
+
+# Test that the following transitions are correctly handled:
+# - Updated submodule
+# - New submodule
+# - Removed submodule
+# - Directory containing tracked files replaced by submodule
+# - Submodule replaced by tracked files in directory
+# - Submodule replaced by tracked file with the same name
+# - Tracked file replaced by submodule
+#
+# The default is that submodule contents aren't changed until "git submodule
+# update" is run. And even then that command doesn't delete the work tree of
+# a removed submodule.
+#
+# The first argument of the callback function will be the name of the submodule.
+#
+# Removing a submodule containing a .git directory must fail even when forced
+# to protect the history! If we are testing this case, the second argument of
+# the callback function will be 'test_must_fail', else it will be the empty
+# string.
+#
+
+# Internal function; use test_submodule_switch_func(), test_submodule_switch(),
+# or test_submodule_forced_switch() instead.
+test_submodule_switch_common () {
+ command="$1"
+ ######################### Appearing submodule #########################
+ # Switching to a commit letting a submodule appear creates empty dir ...
+ test_expect_success "$command: added submodule creates empty directory" '
+ prolog &&
+ reset_work_tree_to no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_dir_is_empty sub1 &&
+ git submodule update --init --recursive &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # ... and doesn't care if it already exists.
+ if test "$KNOWN_FAILURE_STASH_DOES_IGNORE_SUBMODULE_CHANGES" = 1
+ then
+ # Restoring stash fails to restore submodule index entry
+ RESULT="failure"
+ else
+ RESULT="success"
+ fi
+ test_expect_$RESULT "$command: added submodule leaves existing empty directory alone" '
+ prolog &&
+ reset_work_tree_to no_submodule &&
+ (
+ cd submodule_update &&
+ mkdir sub1 &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_dir_is_empty sub1 &&
+ git submodule update --init --recursive &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # Replacing a tracked file with a submodule produces an empty
+ # directory ...
+ test_expect_$RESULT "$command: replace tracked file with submodule creates empty directory" '
+ prolog &&
+ reset_work_tree_to replace_sub1_with_file &&
+ (
+ cd submodule_update &&
+ git branch -t replace_file_with_sub1 origin/replace_file_with_sub1 &&
+ $command replace_file_with_sub1 &&
+ test_superproject_content origin/replace_file_with_sub1 &&
+ test_dir_is_empty sub1 &&
+ git submodule update --init --recursive &&
+ test_submodule_content sub1 origin/replace_file_with_sub1
+ )
+ '
+ # ... as does removing a directory with tracked files with a
+ # submodule.
+ if test "$KNOWN_FAILURE_NOFF_MERGE_DOESNT_CREATE_EMPTY_SUBMODULE_DIR" = 1
+ then
+ # Non fast-forward merges fail with "Directory sub1 doesn't
+ # exist. sub1" because the empty submodule directory is not
+ # created
+ RESULT="failure"
+ else
+ RESULT="success"
+ fi
+ test_expect_$RESULT "$command: replace directory with submodule" '
+ prolog &&
+ reset_work_tree_to replace_sub1_with_directory &&
+ (
+ cd submodule_update &&
+ git branch -t replace_directory_with_sub1 origin/replace_directory_with_sub1 &&
+ $command replace_directory_with_sub1 &&
+ test_superproject_content origin/replace_directory_with_sub1 &&
+ test_dir_is_empty sub1 &&
+ git submodule update --init --recursive &&
+ test_submodule_content sub1 origin/replace_directory_with_sub1
+ )
+ '
+
+ ######################## Disappearing submodule #######################
+ # Removing a submodule doesn't remove its work tree ...
+ if test "$KNOWN_FAILURE_STASH_DOES_IGNORE_SUBMODULE_CHANGES" = 1
+ then
+ RESULT="failure"
+ else
+ RESULT="success"
+ fi
+ test_expect_$RESULT "$command: removed submodule leaves submodule directory and its contents in place" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t remove_sub1 origin/remove_sub1 &&
+ $command remove_sub1 &&
+ test_superproject_content origin/remove_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # ... especially when it contains a .git directory.
+ test_expect_$RESULT "$command: removed submodule leaves submodule containing a .git directory alone" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t remove_sub1 origin/remove_sub1 &&
+ replace_gitfile_with_git_dir sub1 &&
+ $command remove_sub1 &&
+ test_superproject_content origin/remove_sub1 &&
+ test_git_directory_is_unchanged sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # Replacing a submodule with files in a directory must fail as the
+ # submodule work tree isn't removed ...
+ if test "$KNOWN_FAILURE_NOFF_MERGE_ATTEMPTS_TO_MERGE_REMOVED_SUBMODULE_FILES" = 1
+ then
+ # Non fast-forward merges attempt to merge the former
+ # submodule files with the newly checked out ones in the
+ # directory of the same name while it shouldn't.
+ RESULT="failure"
+ elif test "$KNOWN_FAILURE_FORCED_SWITCH_TESTS" = 1
+ then
+ # All existing tests that use test_submodule_forced_switch()
+ # require this.
+ RESULT="failure"
+ else
+ RESULT="success"
+ fi
+ test_expect_$RESULT "$command: replace submodule with a directory must fail" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_directory origin/replace_sub1_with_directory &&
+ $command replace_sub1_with_directory test_must_fail &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # ... especially when it contains a .git directory.
+ test_expect_$RESULT "$command: replace submodule containing a .git directory with a directory must fail" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_directory origin/replace_sub1_with_directory &&
+ replace_gitfile_with_git_dir sub1 &&
+ $command replace_sub1_with_directory test_must_fail &&
+ test_superproject_content origin/add_sub1 &&
+ test_git_directory_is_unchanged sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # Replacing it with a file must fail as it could throw away any local
+ # work tree changes ...
+ test_expect_failure "$command: replace submodule with a file must fail" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+ $command replace_sub1_with_file test_must_fail &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # ... or even destroy unpushed parts of submodule history if that
+ # still uses a .git directory.
+ test_expect_failure "$command: replace submodule containing a .git directory with a file must fail" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+ replace_gitfile_with_git_dir sub1 &&
+ $command replace_sub1_with_file test_must_fail &&
+ test_superproject_content origin/add_sub1 &&
+ test_git_directory_is_unchanged sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+
+ ########################## Modified submodule #########################
+ # Updating a submodule sha1 doesn't update the submodule's work tree
+ if test "$KNOWN_FAILURE_CHERRY_PICK_SEES_EMPTY_COMMIT" = 1
+ then
+ # When cherry picking a SHA-1 update for an ignored submodule
+ # the commit incorrectly fails with "The previous cherry-pick
+ # is now empty, possibly due to conflict resolution."
+ RESULT="failure"
+ else
+ RESULT="success"
+ fi
+ test_expect_$RESULT "$command: modified submodule does not update submodule work tree" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t modify_sub1 origin/modify_sub1 &&
+ $command modify_sub1 &&
+ test_superproject_content origin/modify_sub1 &&
+ test_submodule_content sub1 origin/add_sub1 &&
+ git submodule update &&
+ test_submodule_content sub1 origin/modify_sub1
+ )
+ '
+ # Updating a submodule to an invalid sha1 doesn't update the
+ # submodule's work tree, subsequent update will fail
+ test_expect_$RESULT "$command: modified submodule does not update submodule work tree to invalid commit" '
+ prolog &&
+ reset_work_tree_to add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t invalid_sub1 origin/invalid_sub1 &&
+ $command invalid_sub1 &&
+ test_superproject_content origin/invalid_sub1 &&
+ test_submodule_content sub1 origin/add_sub1 &&
+ test_must_fail git submodule update &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # Updating a submodule from an invalid sha1 doesn't update the
+ # submodule's work tree, subsequent update will succeed
+ test_expect_$RESULT "$command: modified submodule does not update submodule work tree from invalid commit" '
+ prolog &&
+ reset_work_tree_to invalid_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t valid_sub1 origin/valid_sub1 &&
+ $command valid_sub1 &&
+ test_superproject_content origin/valid_sub1 &&
+ test_dir_is_empty sub1 &&
+ git submodule update --init --recursive &&
+ test_submodule_content sub1 origin/valid_sub1
+ )
+ '
+}
+
+# Declares and invokes several tests that, in various situations, checks that
+# the provided transition function:
+# - succeeds in updating the worktree and index of a superproject to a target
+# commit, or fails atomically (depending on the test situation)
+# - if succeeds, the contents of submodule directories are unchanged
+# - if succeeds, once "git submodule update" is invoked, the contents of
+# submodule directories are updated
+#
+# If the command under test is known to not work with submodules in certain
+# conditions, set the appropriate KNOWN_FAILURE_* variable used in the tests
+# below to 1.
+#
+# The first argument of the callback function will be the name of the submodule.
+#
+# Removing a submodule containing a .git directory must fail even when forced
+# to protect the history! If we are testing this case, the second argument of
+# the callback function will be 'test_must_fail', else it will be the empty
+# string.
+#
+# The following example uses `git some-command` as an example command to be
+# tested. It updates the worktree and index to match a target, but not any
+# submodule directories.
+#
+# my_func () {
+# ...prepare for `git some-command` to be run...
+# $2 git some-command "$1" &&
+# if test -n "$2"
+# then
+# return
+# fi &&
+# ...check the state after git some-command is run...
+# }
+# test_submodule_switch_func "my_func"
+test_submodule_switch_func () {
+ command="$1"
+ test_submodule_switch_common "$command"
+
+ # An empty directory does not prevent the creation of a submodule of
+ # the same name, but a file does.
+ test_expect_success "$command: added submodule doesn't remove untracked unignored file with same name" '
+ prolog &&
+ reset_work_tree_to no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ >sub1 &&
+ $command add_sub1 test_must_fail &&
+ test_superproject_content origin/no_submodule &&
+ test_must_be_empty sub1
+ )
+ '
+}
+
+# Ensures that the that the arg either contains "test_must_fail" or is empty.
+may_only_be_test_must_fail () {
+ test -z "$1" || test "$1" = test_must_fail || die
+}
+
+git_test_func () {
+ may_only_be_test_must_fail "$2" &&
+ $2 git $gitcmd "$1"
+}
+
+test_submodule_switch () {
+ gitcmd="$1"
+ test_submodule_switch_func "git_test_func"
+}
+
+# Same as test_submodule_switch(), except that throwing away local changes in
+# the superproject is allowed.
+test_submodule_forced_switch () {
+ gitcmd="$1"
+ command="git_test_func"
+ KNOWN_FAILURE_FORCED_SWITCH_TESTS=1
+ test_submodule_switch_common "$command"
+
+ # When forced, a file in the superproject does not prevent creating a
+ # submodule of the same name.
+ test_expect_success "$command: added submodule does remove untracked unignored file with same name when forced" '
+ prolog &&
+ reset_work_tree_to no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ >sub1 &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_dir_is_empty sub1
+ )
+ '
+}
+
+# Test that submodule contents are correctly updated when switching
+# between commits that change a submodule.
+# Test that the following transitions are correctly handled:
+# (These tests are also above in the case where we expect no change
+# in the submodule)
+# - Updated submodule
+# - New submodule
+# - Removed submodule
+# - Directory containing tracked files replaced by submodule
+# - Submodule replaced by tracked files in directory
+# - Submodule replaced by tracked file with the same name
+# - Tracked file replaced by submodule
+#
+# New test cases
+# - Removing a submodule with a git directory absorbs the submodules
+# git directory first into the superproject.
+# - Switching from no submodule to nested submodules
+# - Switching from nested submodules to no submodule
+
+# Internal function; use test_submodule_switch_recursing_with_args() or
+# test_submodule_forced_switch_recursing_with_args() instead.
+test_submodule_recursing_with_args_common () {
+ command="$1 --recurse-submodules"
+
+ ######################### Appearing submodule #########################
+ # Switching to a commit letting a submodule appear checks it out ...
+ test_expect_success "$command: added submodule is checked out" '
+ prolog &&
+ reset_work_tree_to_interested no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # ... ignoring an empty existing directory.
+ test_expect_success "$command: added submodule is checked out in empty dir" '
+ prolog &&
+ reset_work_tree_to_interested no_submodule &&
+ (
+ cd submodule_update &&
+ mkdir sub1 &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+
+ # Replacing a tracked file with a submodule produces a checked out submodule
+ test_expect_success "$command: replace tracked file with submodule checks out submodule" '
+ prolog &&
+ reset_work_tree_to_interested replace_sub1_with_file &&
+ (
+ cd submodule_update &&
+ git branch -t replace_file_with_sub1 origin/replace_file_with_sub1 &&
+ $command replace_file_with_sub1 &&
+ test_superproject_content origin/replace_file_with_sub1 &&
+ test_submodule_content sub1 origin/replace_file_with_sub1
+ )
+ '
+ # ... as does removing a directory with tracked files with a submodule.
+ test_expect_success "$command: replace directory with submodule" '
+ prolog &&
+ reset_work_tree_to_interested replace_sub1_with_directory &&
+ (
+ cd submodule_update &&
+ git branch -t replace_directory_with_sub1 origin/replace_directory_with_sub1 &&
+ $command replace_directory_with_sub1 &&
+ test_superproject_content origin/replace_directory_with_sub1 &&
+ test_submodule_content sub1 origin/replace_directory_with_sub1
+ )
+ '
+ # Switching to a commit with nested submodules recursively checks them out
+ test_expect_success "$command: nested submodules are checked out" '
+ prolog &&
+ reset_work_tree_to_interested no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t modify_sub1_recursively origin/modify_sub1_recursively &&
+ $command modify_sub1_recursively &&
+ test_superproject_content origin/modify_sub1_recursively &&
+ test_submodule_content sub1 origin/modify_sub1_recursively &&
+ test_submodule_content -C sub1 sub2 origin/modify_sub1_recursively
+ )
+ '
+
+ ######################## Disappearing submodule #######################
+ # Removing a submodule removes its work tree ...
+ test_expect_success "$command: removed submodule removes submodules working tree" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t remove_sub1 origin/remove_sub1 &&
+ $command remove_sub1 &&
+ test_superproject_content origin/remove_sub1 &&
+ ! test -e sub1 &&
+ test_must_fail git config -f .git/modules/sub1/config core.worktree
+ )
+ '
+ # ... absorbing a .git directory along the way.
+ test_expect_success "$command: removed submodule absorbs submodules .git directory" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t remove_sub1 origin/remove_sub1 &&
+ replace_gitfile_with_git_dir sub1 &&
+ rm -rf .git/modules &&
+ $command remove_sub1 &&
+ test_superproject_content origin/remove_sub1 &&
+ ! test -e sub1 &&
+ test_git_directory_exists sub1
+ )
+ '
+
+ # Replacing it with a file ...
+ test_expect_success "$command: replace submodule with a file" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+ $command replace_sub1_with_file &&
+ test_superproject_content origin/replace_sub1_with_file &&
+ test -f sub1
+ )
+ '
+ RESULTDS=success
+ if test "$KNOWN_FAILURE_DIRECTORY_SUBMODULE_CONFLICTS" = 1
+ then
+ RESULTDS=failure
+ fi
+ # ... must check its local work tree for untracked files
+ test_expect_$RESULTDS "$command: replace submodule with a file must fail with untracked files" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+ : >sub1/untrackedfile &&
+ test_must_fail $command replace_sub1_with_file &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1 &&
+ test -f sub1/untracked_file
+ )
+ '
+
+ # Switching to a commit without nested submodules removes their worktrees
+ test_expect_success "$command: worktrees of nested submodules are removed" '
+ prolog &&
+ reset_work_tree_to_interested add_nested_sub &&
+ (
+ cd submodule_update &&
+ git branch -t no_submodule origin/no_submodule &&
+ $command no_submodule &&
+ test_superproject_content origin/no_submodule &&
+ ! test_path_is_dir sub1 &&
+ test_must_fail git config -f .git/modules/sub1/config core.worktree &&
+ test_must_fail git config -f .git/modules/sub1/modules/sub2/config core.worktree
+ )
+ '
+
+ ########################## Modified submodule #########################
+ # Updating a submodule sha1 updates the submodule's work tree
+ test_expect_success "$command: modified submodule updates submodule work tree" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t modify_sub1 origin/modify_sub1 &&
+ $command modify_sub1 &&
+ test_superproject_content origin/modify_sub1 &&
+ test_submodule_content sub1 origin/modify_sub1
+ )
+ '
+ # Updating a submodule to an invalid sha1 doesn't update the
+ # superproject nor the submodule's work tree.
+ test_expect_success "$command: updating to a missing submodule commit fails" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t invalid_sub1 origin/invalid_sub1 &&
+ test_must_fail $command invalid_sub1 2>err &&
+ test_i18ngrep sub1 err &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+ # Updating a submodule does not touch the currently checked out branch in the submodule
+ test_expect_success "$command: submodule branch is not changed, detach HEAD instead" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git -C sub1 checkout -b keep_branch &&
+ git -C sub1 rev-parse HEAD >expect &&
+ git branch -t modify_sub1 origin/modify_sub1 &&
+ $command modify_sub1 &&
+ test_superproject_content origin/modify_sub1 &&
+ test_submodule_content sub1 origin/modify_sub1 &&
+ git -C sub1 rev-parse keep_branch >actual &&
+ test_cmp expect actual &&
+ test_must_fail git -C sub1 symbolic-ref HEAD
+ )
+ '
+}
+
+# Declares and invokes several tests that, in various situations, checks that
+# the provided Git command, when invoked with --recurse-submodules:
+# - succeeds in updating the worktree and index of a superproject to a target
+# commit, or fails atomically (depending on the test situation)
+# - if succeeds, the contents of submodule directories are updated
+#
+# Specify the Git command so that "git $GIT_COMMAND --recurse-submodules"
+# works.
+#
+# If the command under test is known to not work with submodules in certain
+# conditions, set the appropriate KNOWN_FAILURE_* variable used in the tests
+# below to 1.
+#
+# Use as follows:
+#
+# test_submodule_switch_recursing_with_args "$GIT_COMMAND"
+test_submodule_switch_recursing_with_args () {
+ cmd_args="$1"
+ command="git $cmd_args"
+ test_submodule_recursing_with_args_common "$command"
+
+ RESULTDS=success
+ if test "$KNOWN_FAILURE_DIRECTORY_SUBMODULE_CONFLICTS" = 1
+ then
+ RESULTDS=failure
+ fi
+ RESULTOI=success
+ if test "$KNOWN_FAILURE_SUBMODULE_OVERWRITE_IGNORED_UNTRACKED" = 1
+ then
+ RESULTOI=failure
+ fi
+ # Switching to a commit letting a submodule appear cannot override an
+ # untracked file.
+ test_expect_success "$command: added submodule doesn't remove untracked file with same name" '
+ prolog &&
+ reset_work_tree_to_interested no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ : >sub1 &&
+ test_must_fail $command add_sub1 &&
+ test_superproject_content origin/no_submodule &&
+ test_must_be_empty sub1
+ )
+ '
+ # ... but an ignored file is fine.
+ test_expect_$RESULTOI "$command: added submodule removes an untracked ignored file" '
+ test_when_finished "rm -rf submodule_update/.git/info" &&
+ prolog &&
+ reset_work_tree_to_interested no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ : >sub1 &&
+ mkdir .git/info &&
+ echo sub1 >.git/info/exclude &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+
+ # Replacing a submodule with files in a directory must succeeds
+ # when the submodule is clean
+ test_expect_$RESULTDS "$command: replace submodule with a directory" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_directory origin/replace_sub1_with_directory &&
+ $command replace_sub1_with_directory &&
+ test_superproject_content origin/replace_sub1_with_directory &&
+ test_submodule_content sub1 origin/replace_sub1_with_directory
+ )
+ '
+ # ... absorbing a .git directory.
+ test_expect_$RESULTDS "$command: replace submodule containing a .git directory with a directory must absorb the git dir" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_directory origin/replace_sub1_with_directory &&
+ replace_gitfile_with_git_dir sub1 &&
+ rm -rf .git/modules &&
+ $command replace_sub1_with_directory &&
+ test_superproject_content origin/replace_sub1_with_directory &&
+ test_git_directory_exists sub1
+ )
+ '
+
+ # ... and ignored files are ignored
+ test_expect_success "$command: replace submodule with a file works ignores ignored files in submodule" '
+ test_when_finished "rm submodule_update/.git/modules/sub1/info/exclude" &&
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ rm -rf .git/modules/sub1/info &&
+ git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+ mkdir .git/modules/sub1/info &&
+ echo ignored >.git/modules/sub1/info/exclude &&
+ : >sub1/ignored &&
+ $command replace_sub1_with_file &&
+ test_superproject_content origin/replace_sub1_with_file &&
+ test -f sub1
+ )
+ '
+
+ test_expect_success "git -c submodule.recurse=true $cmd_args: modified submodule updates submodule work tree" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t modify_sub1 origin/modify_sub1 &&
+ git -c submodule.recurse=true $cmd_args modify_sub1 &&
+ test_superproject_content origin/modify_sub1 &&
+ test_submodule_content sub1 origin/modify_sub1
+ )
+ '
+
+ test_expect_success "$command: modified submodule updates submodule recursively" '
+ prolog &&
+ reset_work_tree_to_interested add_nested_sub &&
+ (
+ cd submodule_update &&
+ git branch -t modify_sub1_recursively origin/modify_sub1_recursively &&
+ $command modify_sub1_recursively &&
+ test_superproject_content origin/modify_sub1_recursively &&
+ test_submodule_content sub1 origin/modify_sub1_recursively &&
+ test_submodule_content -C sub1 sub2 origin/modify_sub1_recursively
+ )
+ '
+}
+
+# Same as test_submodule_switch_recursing_with_args(), except that throwing
+# away local changes in the superproject is allowed.
+test_submodule_forced_switch_recursing_with_args () {
+ cmd_args="$1"
+ command="git $cmd_args"
+ test_submodule_recursing_with_args_common "$command"
+
+ RESULT=success
+ if test "$KNOWN_FAILURE_DIRECTORY_SUBMODULE_CONFLICTS" = 1
+ then
+ RESULT=failure
+ fi
+ # Switching to a commit letting a submodule appear does not care about
+ # an untracked file.
+ test_expect_success "$command: added submodule does remove untracked unignored file with same name when forced" '
+ prolog &&
+ reset_work_tree_to_interested no_submodule &&
+ (
+ cd submodule_update &&
+ git branch -t add_sub1 origin/add_sub1 &&
+ >sub1 &&
+ $command add_sub1 &&
+ test_superproject_content origin/add_sub1 &&
+ test_submodule_content sub1 origin/add_sub1
+ )
+ '
+
+ # Replacing a submodule with files in a directory ...
+ test_expect_success "$command: replace submodule with a directory" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_directory origin/replace_sub1_with_directory &&
+ $command replace_sub1_with_directory &&
+ test_superproject_content origin/replace_sub1_with_directory
+ )
+ '
+ # ... absorbing a .git directory.
+ test_expect_success "$command: replace submodule containing a .git directory with a directory must fail" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_directory origin/replace_sub1_with_directory &&
+ replace_gitfile_with_git_dir sub1 &&
+ rm -rf .git/modules/sub1 &&
+ $command replace_sub1_with_directory &&
+ test_superproject_content origin/replace_sub1_with_directory &&
+ test_git_directory_exists sub1
+ )
+ '
+
+ # ... even if the submodule contains ignored files
+ test_expect_success "$command: replace submodule with a file ignoring ignored files" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+ : >sub1/expect &&
+ $command replace_sub1_with_file &&
+ test_superproject_content origin/replace_sub1_with_file
+ )
+ '
+
+ # Updating a submodule from an invalid sha1 updates
+ test_expect_success "$command: modified submodule does update submodule work tree from invalid commit" '
+ prolog &&
+ reset_work_tree_to_interested invalid_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t valid_sub1 origin/valid_sub1 &&
+ $command valid_sub1 &&
+ test_superproject_content origin/valid_sub1 &&
+ test_submodule_content sub1 origin/valid_sub1
+ )
+ '
+
+ # Old versions of Git were buggy writing the .git link file
+ # (e.g. before f8eaa0ba98b and then moving the superproject repo
+ # whose submodules contained absolute paths)
+ test_expect_success "$command: updating submodules fixes .git links" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ git branch -t modify_sub1 origin/modify_sub1 &&
+ echo "gitdir: bogus/path" >sub1/.git &&
+ $command modify_sub1 &&
+ test_superproject_content origin/modify_sub1 &&
+ test_submodule_content sub1 origin/modify_sub1
+ )
+ '
+
+ test_expect_success "$command: changed submodule worktree is reset" '
+ prolog &&
+ reset_work_tree_to_interested add_sub1 &&
+ (
+ cd submodule_update &&
+ rm sub1/file1 &&
+ : >sub1/new_file &&
+ git -C sub1 add new_file &&
+ $command HEAD &&
+ test_path_is_file sub1/file1 &&
+ test_path_is_missing sub1/new_file
+ )
+ '
+}