compilers/rust: add type annotations

1 files changed, 38 insertions, 25 deletions

diff --git a/mesonbuild/compilers/rust.py b/mesonbuild/compilers/rust.py
index 7b4c092..02bc791 100644
--- a/mesonbuild/compilers/rust.py
+++ b/mesonbuild/compilers/rust.py
@@ -13,51 +13,63 @@
 # limitations under the License.
 
 import subprocess, os.path
+import textwrap
 import typing as T
 
 from ..mesonlib import EnvironmentException, MachineChoice, Popen_safe
 from .compilers import Compiler, rust_buildtype_args, clike_debug_args
 
 if T.TYPE_CHECKING:
+    from ..dependencies import ExternalProgram
     from ..envconfig import MachineInfo
     from ..environment import Environment  # noqa: F401
+    from ..linkers import DynamicLinker
 
-rust_optimization_args = {'0': [],
-                          'g': ['-C', 'opt-level=0'],
-                          '1': ['-C', 'opt-level=1'],
-                          '2': ['-C', 'opt-level=2'],
-                          '3': ['-C', 'opt-level=3'],
-                          's': ['-C', 'opt-level=s'],
-                          }
+rust_optimization_args = {
+    '0': [],
+    'g': ['-C', 'opt-level=0'],
+    '1': ['-C', 'opt-level=1'],
+    '2': ['-C', 'opt-level=2'],
+    '3': ['-C', 'opt-level=3'],
+    's': ['-C', 'opt-level=s'],
+}  # type: T.Dict[str, T.List[str]]
 
 class RustCompiler(Compiler):
 
     # rustc doesn't invoke the compiler itself, it doesn't need a LINKER_PREFIX
     language = 'rust'
 
-    def __init__(self, exelist, version, for_machine: MachineChoice,
-                 is_cross: bool, info: 'MachineInfo', exe_wrapper=None, **kwargs):
-        super().__init__(exelist, version, for_machine, info, is_cross=is_cross, **kwargs)
+    def __init__(self, exelist: T.List[str], version: str, for_machine: MachineChoice,
+                 is_cross: bool, info: 'MachineInfo',
+                 exe_wrapper: T.Optional['ExternalProgram'] = None,
+                 full_version: T.Optional[str] = None,
+                 linker: T.Optional['DynamicLinker'] = None):
+        super().__init__(exelist, version, for_machine, info,
+                         is_cross=is_cross, full_version=full_version,
+                         linker=linker)
         self.exe_wrapper = exe_wrapper
         self.id = 'rustc'
 
-    def needs_static_linker(self):
+    def needs_static_linker(self) -> bool:
         return False
 
-    def sanity_check(self, work_dir, environment):
+    def sanity_check(self, work_dir: str, environment: 'Environment') -> None:
         source_name = os.path.join(work_dir, 'sanity.rs')
         output_name = os.path.join(work_dir, 'rusttest')
         with open(source_name, 'w') as ofile:
-            ofile.write('''fn main() {
-}
-''')
+            ofile.write(textwrap.dedent(
+                '''fn main() {
+                }
+                '''))
         pc = subprocess.Popen(self.exelist + ['-o', output_name, source_name],
                               stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE,
                               cwd=work_dir)
-        stdo, stde = pc.communicate()
-        stdo = stdo.decode('utf-8', errors='replace')
-        stde = stde.decode('utf-8', errors='replace')
+        _stdo, _stde = pc.communicate()
+        assert isinstance(_stdo, bytes)
+        assert isinstance(_stde, bytes)
+        stdo = _stdo.decode('utf-8', errors='replace')
+        stde = _stde.decode('utf-8', errors='replace')
         if pc.returncode != 0:
             raise EnvironmentException('Rust compiler %s can not compile programs.\n%s\n%s' % (
                 self.name_string(),
@@ -67,7 +79,7 @@ class RustCompiler(Compiler):
             if self.exe_wrapper is None:
                 # Can't check if the binaries run so we have to assume they do
                 return
-            cmdlist = self.exe_wrapper + [output_name]
+            cmdlist = self.exe_wrapper.get_command() + [output_name]
         else:
             cmdlist = [output_name]
         pe = subprocess.Popen(cmdlist, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
@@ -75,24 +87,25 @@ class RustCompiler(Compiler):
         if pe.returncode != 0:
             raise EnvironmentException('Executables created by Rust compiler %s are not runnable.' % self.name_string())
 
-    def get_dependency_gen_args(self, outfile):
+    def get_dependency_gen_args(self, outtarget: str, outfile: str) -> T.List[str]:
         return ['--dep-info', outfile]
 
-    def get_buildtype_args(self, buildtype):
+    def get_buildtype_args(self, buildtype: str) -> T.List[str]:
         return rust_buildtype_args[buildtype]
 
-    def get_sysroot(self):
+    def get_sysroot(self) -> str:
         cmd = self.exelist + ['--print', 'sysroot']
         p, stdo, stde = Popen_safe(cmd)
         return stdo.split('\n')[0]
 
-    def get_debug_args(self, is_debug):
+    def get_debug_args(self, is_debug: bool) -> T.List[str]:
         return clike_debug_args[is_debug]
 
-    def get_optimization_args(self, optimization_level):
+    def get_optimization_args(self, optimization_level: str) -> T.List[str]:
         return rust_optimization_args[optimization_level]
 
-    def compute_parameters_with_absolute_paths(self, parameter_list, build_dir):
+    def compute_parameters_with_absolute_paths(self, parameter_list: T.List[str],
+                                               build_dir: str) -> T.List[str]:
         for idx, i in enumerate(parameter_list):
             if i[:2] == '-L':
                 for j in ['dependency', 'crate', 'native', 'framework', 'all']: