Merge pull request github#11622 from github/redsun82/swift-fix-parent-paths

Swift: fix extraction of sources from `..`

Author: AlexDenisov

swift/extractor/SwiftExtractor.cpp

@@ -12,7 +12,7 @@
 #include "swift/extractor/translators/SwiftVisitor.h"
 #include "swift/extractor/TargetTrapFile.h"
 #include "swift/extractor/SwiftBuiltinSymbols.h"
-#include "swift/extractor/infra/Path.h"
+#include "swift/extractor/infra/file/Path.h"
 
 using namespace codeql;
 using namespace std::string_literals;
@@ -28,27 +28,23 @@ static void ensureDirectory(const char* label, const fs::path& dir) {
 }
 
 static void archiveFile(const SwiftExtractorConfiguration& config, swift::SourceFile& file) {
-  ensureDirectory("TRAP", config.trapDir);
-  ensureDirectory("source archive", config.sourceArchiveDir);
+  auto source = codeql::resolvePath(file.getFilename());
+  auto destination = config.sourceArchiveDir / source.relative_path();
 
-  fs::path srcFilePath = codeql::getCodeQLPath(file.getFilename());
-  auto dstFilePath = config.sourceArchiveDir;
-  dstFilePath += srcFilePath;
-
-  ensureDirectory("source archive destination", dstFilePath.parent_path());
+  ensureDirectory("source archive destination", destination.parent_path());
 
   std::error_code ec;
-  fs::copy(srcFilePath, dstFilePath, fs::copy_options::overwrite_existing, ec);
+  fs::copy(source, destination, fs::copy_options::overwrite_existing, ec);
 
   if (ec) {
-    std::cerr << "Cannot archive source file " << srcFilePath << " -> " << dstFilePath << ": "
+    std::cerr << "Cannot archive source file " << source << " -> " << destination << ": "
               << ec.message() << "\n";
   }
 }
 
 static fs::path getFilename(swift::ModuleDecl& module, swift::SourceFile* primaryFile) {
   if (primaryFile) {
-    return primaryFile->getFilename().str();
+    return resolvePath(primaryFile->getFilename());
   }
   // PCM clang module
   if (module.isNonSwiftModule()) {
@@ -57,7 +53,7 @@ static fs::path getFilename(swift::ModuleDecl& module, swift::SourceFile* primar
     // Moreover, pcm files may come from caches located in different directories, but are
     // unambiguously identified by the base file name, so we can discard the absolute directory
     fs::path filename = "/pcms";
-    filename /= getCodeQLPath(module.getModuleFilename()).filename();
+    filename /= fs::path{std::string_view{module.getModuleFilename()}}.filename();
     filename += "-";
     filename += module.getName().str();
     return filename;
@@ -66,13 +62,13 @@ static fs::path getFilename(swift::ModuleDecl& module, swift::SourceFile* primar
     // The Builtin module has an empty filename, let's fix that
     return "/__Builtin__";
   }
-  auto filename = getCodeQLPath(module.getModuleFilename());
+  std::string_view filename = module.getModuleFilename();
   // there is a special case of a module without an actual filename reporting `<imports>`: in this
   // case we want to avoid the `<>` characters, in case a dirty DB is imported on Windows
   if (filename == "<imports>") {
     return "/__imports__";
   }
-  return filename;
+  return resolvePath(filename);
 }
 
 /* The builtin module is special, as it does not publish any top-level declaration

swift/extractor/infra/Path.h

@@ -5,7 +5,7 @@
 #include "swift/extractor/trap/generated/TrapEntries.h"
 #include "swift/extractor/trap/generated/TrapClasses.h"
 #include "swift/extractor/infra/SwiftLocationExtractor.h"
-#include "swift/extractor/infra/Path.h"
+#include "swift/extractor/infra/file/Path.h"
 
 using namespace codeql;
 
@@ -17,7 +17,7 @@ void SwiftLocationExtractor::attachLocation(const swift::SourceManager& sourceMa
     // invalid locations seem to come from entities synthesized by the compiler
     return;
   }
-  auto file = getCodeQLPath(sourceManager.getDisplayNameForLoc(start));
+  auto file = resolvePath(sourceManager.getDisplayNameForLoc(start));
   DbLocation entry{{}};
   entry.file = fetchFileLabel(file);
   std::tie(entry.start_line, entry.start_column) = sourceManager.getLineAndColumnInBuffer(start);
@@ -30,7 +30,7 @@ void SwiftLocationExtractor::attachLocation(const swift::SourceManager& sourceMa
 }
 
 void SwiftLocationExtractor::emitFile(llvm::StringRef path) {
-  fetchFileLabel(getCodeQLPath(path));
+  fetchFileLabel(resolvePath(path));
 }
 
 TrapLabel<FileTag> SwiftLocationExtractor::fetchFileLabel(const std::filesystem::path& file) {

swift/extractor/infra/SwiftLocationExtractor.cpp

@@ -1,4 +1,4 @@
-#include "swift/extractor/infra/Path.h"
+#include "swift/extractor/infra/file/Path.h"
 #include <iostream>
 #include <unistd.h>
 
@@ -16,7 +16,7 @@ static bool shouldCanonicalize() {
   return true;
 }
 
-std::filesystem::path getCodeQLPath(std::string_view path) {
+std::filesystem::path resolvePath(std::string_view path) {
   std::error_code ec;
   std::filesystem::path ret = {};
   static const auto canonicalize = shouldCanonicalize();
@@ -28,7 +28,7 @@ std::filesystem::path getCodeQLPath(std::string_view path) {
   if (ec) {
     std::cerr << "Cannot get " << (canonicalize ? "canonical" : "absolute")
               << " path: " << std::quoted(path) << ": " << ec.message() << "\n";
-    return {};
+    return path;
   }
   return ret;
 }

swift/extractor/infra/Path.cpp renamed to swift/extractor/infra/file/Path.cpp

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <filesystem>
+
+namespace codeql {
+std::filesystem::path resolvePath(std::string_view path);
+}

swift/extractor/infra/file/Path.h

@@ -5,4 +5,5 @@
 | E.swift:0:0:0:0 | E.swift |
 | F1.swift:0:0:0:0 | F1.swift |
 | F2.swift:0:0:0:0 | F2.swift |
+| G.swift:0:0:0:0 | G.swift |
 | file://:0:0:0:0 |  |

swift/integration-tests/posix-only/frontend-invocations/Files.expected

@@ -16,3 +16,4 @@ $FRONTEND -frontend -c -primary-file E.swift Esup.swift -o E.o $SDK
 $FRONTEND -frontend -emit-module -primary-file F1.swift F2.swift -module-name F -o F1.swiftmodule $SDK
 $FRONTEND -frontend -emit-module F1.swift -primary-file F2.swift -module-name F -o F2.swiftmodule $SDK
 $FRONTEND -merge-modules F1.swiftmodule F2.swiftmodule -o F.swiftmodule $SDK
+( cd dir; $FRONTEND -frontend -c ../G.swift $SDK )

swift/integration-tests/posix-only/frontend-invocations/G.swift

@@ -1,9 +1,3 @@
-#-----| [ModuleDecl] __ObjC
-#-----| [ModuleDecl] cfg
-#-----| [ModuleDecl] declarations
-#-----| [ModuleDecl] expressions
-#-----| [ModuleDecl] patterns
-#-----| [ModuleDecl] statements
 cfg.swift:
 #    1| [TopLevelCodeDecl] { ... }
 #    1|   getBody(): [BraceStmt] { ... }