Merge pull request swiftlang#81996 from Steelskin/fabrice/line-directive-stop-expanding-rsp

line-directive: Stop expanding response files

Author: compnerd

stdlib/cmake/modules/SwiftSource.cmake

@@ -1015,13 +1015,13 @@ function(_compile_swift_files
   # need to work around this by avoiding long command line arguments. This can
   # be achieved by writing the list of file paths to a file, then reading that
   # list in the Python script.
-  string(REPLACE ";" "'\n'" source_files_quoted "${source_files}")
-  string(SHA1 file_name "'${source_files_quoted}'")
+  string(REPLACE ";" "\n" source_files_quoted "${source_files}")
+  string(SHA1 file_name "${source_files_quoted}")
   set(file_path_target "filelist-${file_name}")
   set(file_path "${CMAKE_CURRENT_BINARY_DIR}/${file_name}.txt")
 
   if (NOT TARGET ${file_path_target})
-    file(WRITE "${file_path}.tmp" "'${source_files_quoted}'")
+    file(WRITE "${file_path}.tmp" "${source_files_quoted}")
     add_custom_command_target(unused_var
       COMMAND ${CMAKE_COMMAND} -E copy_if_different "${file_path}.tmp" "${file_path}"
       CUSTOM_TARGET_NAME ${file_path_target}

utils/line-directive

@@ -211,8 +211,7 @@ def read_response_file(file_path):
         # "Make an iterator out of shlex.shlex.get_token, then consume items
         # until it returns None." (Then eagerly convert the result to a list so
         # that we can close the file.)
-        return list(iter(shlex.shlex(files, file_path, posix=True).get_token,
-                         None))
+        return [line.strip() for line in files if line.strip()]
 
 
 def expand_response_files(files):
@@ -686,13 +685,18 @@ def run():
         command_args = expand_response_files(sys.argv[dashes + 1:])
         command_args[0] = os.path.normpath(command_args[0])
 
-        command = subprocess.Popen(
-            command_args,
-            stderr=subprocess.STDOUT,
-            stdout=subprocess.PIPE,
-            universal_newlines=True,
-            encoding='UTF-8'
-        )
+        try:
+            command = subprocess.Popen(
+                command_args,
+                stderr=subprocess.STDOUT,
+                stdout=subprocess.PIPE,
+                universal_newlines=True,
+                encoding='UTF-8'
+            )
+        except Exception as e:
+            sys.stderr.write(f"Error executing command: {e}\n")
+            sys.stderr.write(f"Command: {' '.join(shlex.quote(arg) for arg in command_args)}\n")
+            sys.exit(1)
 
         sources = '(?P<file>' + '|'.join(re.escape(s) for s in sources) + ')'
 
@@ -731,7 +735,12 @@ def run():
                         m.group('tail'))
             sys.stdout.write(output)
 
-        sys.exit(command.wait())
+        exit_code = command.wait()
+        if exit_code != 0:
+            sys.stderr.write(f"Command failed with exit code {exit_code}\n")
+            sys.stderr.write(f"Command: {' '.join(shlex.quote(arg) for arg in command_args)}\n")
+
+        sys.exit(exit_code)
 
 
 if __name__ == '__main__':