Fix running tests from any drive

Author: a3d4

libsolidity/interface/FileReader.cpp

@@ -276,14 +276,8 @@ boost::filesystem::path FileReader::normalizeCLIPathForVFS(
 	// If the path is on the same drive as the working dir, for portability we prefer not to
 	// include the root name. Do this only for non-UNC paths - my experiments show that on Windows
 	// when the working dir is an UNC path, / does not not actually refer to the root of the UNC path.
-	boost::filesystem::path normalizedRootPath = normalizedPath.root_path();
-	if (!isUNCPath(normalizedPath))
-	{
-		boost::filesystem::path workingDirRootPath = canonicalWorkDir.root_path();
-		// Ignore drive letter case on Windows (C:\ <=> c:\).
-		if (boost::filesystem::equivalent(normalizedRootPath, workingDirRootPath))
-			normalizedRootPath = "/";
-	}
+
+	boost::filesystem::path normalizedRootPath = normalizeCLIRootPathForVFS(normalizedPath, canonicalWorkDir);
 
 	// lexically_normal() will not squash paths like "/../../" into "/". We have to do it manually.
 	boost::filesystem::path dotDotPrefix = absoluteDotDotPrefix(normalizedPath);
@@ -308,6 +302,27 @@ boost::filesystem::path FileReader::normalizeCLIPathForVFS(
 	return normalizedPathNoDotDot;
 }
 
+boost::filesystem::path FileReader::normalizeCLIRootPathForVFS(
+	boost::filesystem::path const& _path,
+	boost::filesystem::path const& _workDir
+)
+{
+	solAssert(_workDir.is_absolute(), "");
+
+	boost::filesystem::path absolutePath = boost::filesystem::absolute(_path, _workDir);
+	boost::filesystem::path rootPath = absolutePath.root_path();
+	boost::filesystem::path baseRootPath = _workDir.root_path();
+
+	if (isUNCPath(absolutePath))
+		return rootPath;
+
+	// Ignore drive letter case on Windows (C:\ <=> c:\).
+	if (boost::filesystem::equivalent(rootPath, baseRootPath))
+		return "/";
+
+	return rootPath;
+}
+
 bool FileReader::isPathPrefix(boost::filesystem::path const& _prefix, boost::filesystem::path const& _path)
 {
 	solAssert(!_prefix.empty() && !_path.empty(), "");

libsolidity/interface/FileReader.h

@@ -115,6 +115,17 @@ class FileReader
 		SymlinkResolution _symlinkResolution = SymlinkResolution::Disabled
 	);
 
+	/// Normalizes a root path by excluding, in some cases, its root name.
+	/// The function is used for better portability, and intended to omit root name
+	/// if the path can be used without it.
+	/// @param _path Path to normalize the root path.
+	/// @param _workDir Current working directory path, must be absolute.
+	/// @returns a normalized root path.
+	static boost::filesystem::path normalizeCLIRootPathForVFS(
+		boost::filesystem::path const& _path,
+		boost::filesystem::path const& _workDir = boost::filesystem::current_path()
+	);
+
 	/// @returns true if all the path components of @a _prefix are present at the beginning of @a _path.
 	/// Both paths must be absolute (or have slash as root) and normalized (no . or .. segments, no
 	/// multiple consecutive slashes).

test/libsolidity/interface/FileReader.cpp

@@ -313,8 +313,9 @@ BOOST_AUTO_TEST_CASE(normalizeCLIPathForVFS_should_not_resolve_symlinks_unless_r
 	if (!createSymlinkIfSupportedByFilesystem(tempDir.path() / "abc", tempDir.path() / "sym", true))
 		return;
 
-	boost::filesystem::path expectedPrefixWithSymlinks = "/" / tempDir.path().relative_path();
-	boost::filesystem::path expectedPrefixWithoutSymlinks = "/" / boost::filesystem::weakly_canonical(tempDir).relative_path();
+	boost::filesystem::path expectedRootPath = FileReader::normalizeCLIRootPathForVFS(tempDir);
+	boost::filesystem::path expectedPrefixWithSymlinks = expectedRootPath / tempDir.path().relative_path();
+	boost::filesystem::path expectedPrefixWithoutSymlinks = expectedRootPath / boost::filesystem::weakly_canonical(tempDir).relative_path();
 
 	BOOST_CHECK_EQUAL(
 		FileReader::normalizeCLIPathForVFS(tempDir.path() / "sym/contract.sol", SymlinkResolution::Disabled),

test/solc/CommandLineInterface.cpp

@@ -178,8 +178,9 @@ BOOST_AUTO_TEST_CASE(cli_input)
 	createFilesWithParentDirs({tempDir1.path() / "input1.sol"});
 	createFilesWithParentDirs({tempDir2.path() / "input2.sol"});
 
-	boost::filesystem::path expectedDir1 = "/" / tempDir1.path().relative_path();
-	boost::filesystem::path expectedDir2 = "/" / tempDir2.path().relative_path();
+	boost::filesystem::path expectedRootPath = FileReader::normalizeCLIRootPathForVFS(tempDir1);
+	boost::filesystem::path expectedDir1 = expectedRootPath / tempDir1.path().relative_path();
+	boost::filesystem::path expectedDir2 = expectedRootPath / tempDir2.path().relative_path();
 	soltestAssert(expectedDir1.is_absolute() || expectedDir1.root_path() == "/", "");
 	soltestAssert(expectedDir2.is_absolute() || expectedDir2.root_path() == "/", "");
 
@@ -223,7 +224,8 @@ BOOST_AUTO_TEST_CASE(cli_ignore_missing_some_files_exist)
 	TemporaryDirectory tempDir2(TEST_CASE_NAME);
 	createFilesWithParentDirs({tempDir1.path() / "input1.sol"});
 
-	boost::filesystem::path expectedDir1 = "/" / tempDir1.path().relative_path();
+	boost::filesystem::path expectedRootPath = FileReader::normalizeCLIRootPathForVFS(tempDir1);
+	boost::filesystem::path expectedDir1 = expectedRootPath / tempDir1.path().relative_path();
 	soltestAssert(expectedDir1.is_absolute() || expectedDir1.root_path() == "/", "");
 
 	// NOTE: Allowed paths should not be added for skipped files.