merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/t/t9160-git-svn-preserve-empty-dirs.sh

@@ -0,0 +1,152 @@
+#!/bin/sh
+#
+# Copyright (c) 2011 Ray Chen
+#
+
+test_description='git svn test (option --preserve-empty-dirs)
+
+This test uses git to clone a Subversion repository that contains empty
+directories, and checks that corresponding directories are created in the
+local Git repository with placeholder files.'
+
+. ./lib-git-svn.sh
+
+GIT_REPO=git-svn-repo
+
+test_expect_success 'initialize source svn repo containing empty dirs' '
+	svn_cmd mkdir -m x "$svnrepo"/trunk &&
+	svn_cmd co "$svnrepo"/trunk "$SVN_TREE" &&
+	(
+		cd "$SVN_TREE" &&
+		mkdir -p 1 2 3/a 3/b 4 5 6 &&
+		echo "First non-empty file"  > 2/file1.txt &&
+		echo "Second non-empty file" > 2/file2.txt &&
+		echo "Third non-empty file"  > 3/a/file1.txt &&
+		echo "Fourth non-empty file" > 3/b/file1.txt &&
+		svn_cmd add 1 2 3 4 5 6 &&
+		svn_cmd commit -m "initial commit" &&
+
+		mkdir 4/a &&
+		svn_cmd add 4/a &&
+		svn_cmd commit -m "nested empty directory" &&
+		mkdir 4/a/b &&
+		svn_cmd add 4/a/b &&
+		svn_cmd commit -m "deeply nested empty directory" &&
+		mkdir 4/a/b/c &&
+		svn_cmd add 4/a/b/c &&
+		svn_cmd commit -m "really deeply nested empty directory" &&
+		echo "Kill the placeholder file" > 4/a/b/c/foo &&
+		svn_cmd add 4/a/b/c/foo &&
+		svn_cmd commit -m "Regular file to remove placeholder" &&
+
+		svn_cmd del 2/file2.txt &&
+		svn_cmd del 3/b &&
+		svn_cmd commit -m "delete non-last entry in directory" &&
+
+		svn_cmd del 2/file1.txt &&
+		svn_cmd del 3/a &&
+		svn_cmd commit -m "delete last entry in directory" &&
+
+		echo "Conflict file" > 5/.placeholder &&
+		mkdir 6/.placeholder &&
+		svn_cmd add 5/.placeholder 6/.placeholder &&
+		svn_cmd commit -m "Placeholder Namespace conflict"
+	) &&
+	rm -rf "$SVN_TREE"
+'
+
+test_expect_success 'clone svn repo with --preserve-empty-dirs' '
+	git svn clone "$svnrepo"/trunk --preserve-empty-dirs "$GIT_REPO"
+'
+
+# "$GIT_REPO"/1 should only contain the placeholder file.
+test_expect_success 'directory empty from inception' '
+	test -f "$GIT_REPO"/1/.gitignore &&
+	test $(find "$GIT_REPO"/1 -type f | wc -l) = "1"
+'
+
+# "$GIT_REPO"/2 and "$GIT_REPO"/3 should only contain the placeholder file.
+test_expect_success 'directory empty from subsequent svn commit' '
+	test -f "$GIT_REPO"/2/.gitignore &&
+	test $(find "$GIT_REPO"/2 -type f | wc -l) = "1" &&
+	test -f "$GIT_REPO"/3/.gitignore &&
+	test $(find "$GIT_REPO"/3 -type f | wc -l) = "1"
+'
+
+# No placeholder files should exist in "$GIT_REPO"/4, even though one was
+# generated for every sub-directory at some point in the repo's history.
+test_expect_success 'add entry to previously empty directory' '
+	test $(find "$GIT_REPO"/4 -type f | wc -l) = "1" &&
+	test -f "$GIT_REPO"/4/a/b/c/foo
+'
+
+# The HEAD~2 commit should not have introduced .gitignore placeholder files.
+test_expect_success 'remove non-last entry from directory' '
+	(
+		cd "$GIT_REPO" &&
+		git checkout HEAD~2
+	) &&
+	test_must_fail test -f "$GIT_REPO"/2/.gitignore &&
+	test_must_fail test -f "$GIT_REPO"/3/.gitignore
+'
+
+# After re-cloning the repository with --placeholder-file specified, there
+# should be 5 files named ".placeholder" in the local Git repo.
+test_expect_success 'clone svn repo with --placeholder-file specified' '
+	rm -rf "$GIT_REPO" &&
+	git svn clone "$svnrepo"/trunk --preserve-empty-dirs \
+		--placeholder-file=.placeholder "$GIT_REPO" &&
+	find "$GIT_REPO" -type f -name ".placeholder" &&
+	test $(find "$GIT_REPO" -type f -name ".placeholder" | wc -l) = "5"
+'
+
+# "$GIT_REPO"/5/.placeholder should be a file, and non-empty.
+test_expect_success 'placeholder namespace conflict with file' '
+	test -s "$GIT_REPO"/5/.placeholder
+'
+
+# "$GIT_REPO"/6/.placeholder should be a directory, and the "$GIT_REPO"/6 tree
+# should only contain one file: the placeholder.
+test_expect_success 'placeholder namespace conflict with directory' '
+	test -d "$GIT_REPO"/6/.placeholder &&
+	test -f "$GIT_REPO"/6/.placeholder/.placeholder &&
+	test $(find "$GIT_REPO"/6 -type f | wc -l) = "1"
+'
+
+# Prepare a second set of svn commits to test persistence during rebase.
+test_expect_success 'second set of svn commits and rebase' '
+	svn_cmd co "$svnrepo"/trunk "$SVN_TREE" &&
+	(
+		cd "$SVN_TREE" &&
+		mkdir -p 7 &&
+		echo "This should remove placeholder" > 1/file1.txt &&
+		echo "This should not remove placeholder" > 5/file1.txt &&
+		svn_cmd add 7 1/file1.txt 5/file1.txt &&
+		svn_cmd commit -m "subsequent svn commit for persistence tests"
+	) &&
+	rm -rf "$SVN_TREE" &&
+	(
+		cd "$GIT_REPO" &&
+		git svn rebase
+	)
+'
+
+# Check that --preserve-empty-dirs and --placeholder-file flag state
+# stays persistent over multiple invocations.
+test_expect_success 'flag persistence during subsqeuent rebase' '
+	test -f "$GIT_REPO"/7/.placeholder &&
+	test $(find "$GIT_REPO"/7 -type f | wc -l) = "1"
+'
+
+# Check that placeholder files are properly removed when unnecessary,
+# even across multiple invocations.
+test_expect_success 'placeholder list persistence during subsqeuent rebase' '
+	test -f "$GIT_REPO"/1/file1.txt &&
+	test $(find "$GIT_REPO"/1 -type f | wc -l) = "1" &&
+
+	test -f "$GIT_REPO"/5/file1.txt &&
+	test -f "$GIT_REPO"/5/.placeholder &&
+	test $(find "$GIT_REPO"/5 -type f | wc -l) = "2"
+'
+
+test_done