compilers: directly import from subpackages

It turns out we don't generally need to proxy every compiler ever
through the top-level package. The number of times we directly poke at
one is negligible and direct imports are pretty clean.

mesonbuild/dependencies/dev.py

@@ -27,7 +27,9 @@ import typing as T
 from mesonbuild.interpreterbase.decorators import FeatureDeprecated
 
 from .. import mesonlib, mlog
-from ..compilers import AppleClangCCompiler, AppleClangCPPCompiler, detect_compiler_for
+from ..compilers.c import AppleClangCCompiler
+from ..compilers.cpp import AppleClangCPPCompiler
+from ..compilers.detect import detect_compiler_for
 from ..environment import get_llvm_tool_names
 from ..mesonlib import version_compare, stringlistify, extract_as_list
 from .base import DependencyException, DependencyMethods, strip_system_libdirs, SystemDependency, ExternalDependency, DependencyTypeName

mesonbuild/dependencies/dub.py

@@ -17,8 +17,7 @@ from .pkgconfig import PkgConfigDependency
 from ..mesonlib import (Popen_safe, OptionKey)
 from ..mesonlib.universal import join_args
 from ..programs import ExternalProgram
-from ..compilers import DCompiler
-from ..compilers.d import d_feature_args
+from ..compilers.d import DCompiler, d_feature_args
 from .. import mlog
 import re
 import os

mesonbuild/linkers/linkers.py

@@ -137,12 +137,12 @@ class VisualStudioLikeLinker:
 
     @classmethod
     def unix_args_to_native(cls, args: T.List[str]) -> T.List[str]:
-        from ..compilers import VisualStudioCCompiler
+        from ..compilers.c import VisualStudioCCompiler
         return VisualStudioCCompiler.unix_args_to_native(args)
 
     @classmethod
     def native_args_to_unix(cls, args: T.List[str]) -> T.List[str]:
-        from ..compilers import VisualStudioCCompiler
+        from ..compilers.c import VisualStudioCCompiler
         return VisualStudioCCompiler.native_args_to_unix(args)
 
     def rsp_file_syntax(self) -> RSPFileSyntax:
@@ -1126,7 +1126,7 @@ class NAGDynamicLinker(PosixDynamicLinkerMixin, DynamicLinker):
         return []
 
     def get_std_shared_lib_args(self) -> T.List[str]:
-        from ..compilers import NAGFortranCompiler
+        from ..compilers.fortran import NAGFortranCompiler
         return NAGFortranCompiler.get_nagfor_quiet(self.version) + ['-Wl,-shared']
 
 
@@ -1495,7 +1495,7 @@ class CudaLinker(PosixDynamicLinkerMixin, DynamicLinker):
         #
         #   nvcc fatal : Don't know what to do with 'subprojects/foo/libbar.so.0.1.2'
         #
-        from ..compilers import CudaCompiler
+        from ..compilers.cuda import CudaCompiler
         return CudaCompiler.LINKER_PREFIX
 
     def fatal_warnings(self) -> T.List[str]:

mesonbuild/modules/cuda.py

@@ -17,7 +17,7 @@ import typing as T
 import re
 
 from ..mesonlib import version_compare
-from ..compilers import CudaCompiler
+from ..compilers.cuda import CudaCompiler
 
 from . import NewExtensionModule, ModuleInfo
 

run_tests.py

@@ -34,7 +34,8 @@ from pathlib import Path
 from unittest import mock
 import typing as T
 
-from mesonbuild import compilers
+from mesonbuild.compilers.c import CCompiler
+from mesonbuild.compilers.detect import detect_c_compiler
 from mesonbuild import dependencies
 from mesonbuild import mesonlib
 from mesonbuild import mesonmain
@@ -160,7 +161,7 @@ def get_convincing_fake_env_and_cc(bdir, prefix):
     Useful for running compiler checks in the unit tests.
     '''
     env = get_fake_env('', bdir, prefix)
-    cc = compilers.detect_c_compiler(env, mesonlib.MachineChoice.HOST)
+    cc = detect_c_compiler(env, mesonlib.MachineChoice.HOST)
     # Detect machine info
     env.machines.host = detect_machine_info({'c':cc})
     return (env, cc)
@@ -290,8 +291,8 @@ def run_mtest_inprocess(commandlist: T.List[str]) -> T.Tuple[int, str, str]:
     return returncode, stdout.getvalue()
 
 def clear_meson_configure_class_caches() -> None:
-    compilers.CCompiler.find_library_cache = {}
-    compilers.CCompiler.find_framework_cache = {}
+    CCompiler.find_library_cache = {}
+    CCompiler.find_framework_cache = {}
     dependencies.PkgConfigDependency.pkgbin_cache = {}
     dependencies.PkgConfigDependency.class_pkgbin = mesonlib.PerMachine(None, None)
     mesonlib.project_meson_versions = collections.defaultdict(str)