1 files changed, 277 insertions, 0 deletions
diff --git a/meson/mesonbuild/dependencies/ui.py b/meson/mesonbuild/dependencies/ui.py
new file mode 100644
index 000000000..f256a370c
--- /dev/null
+++ b/meson/mesonbuild/dependencies/ui.py
@@ -0,0 +1,277 @@
+# Copyright 2013-2017 The Meson development team
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file contains the detection logic for external dependencies that
+# are UI-related.
+import os
+import subprocess
+import typing as T
+
+from .. import mlog
+from .. import mesonlib
+from ..mesonlib import (
+    Popen_safe, extract_as_list, version_compare_many
+)
+from ..environment import detect_cpu_family
+
+from .base import DependencyException, DependencyMethods, DependencyTypeName, SystemDependency
+from .configtool import ConfigToolDependency
+from .factory import DependencyFactory
+
+if T.TYPE_CHECKING:
+    from ..environment import Environment
+
+
+class GLDependencySystem(SystemDependency):
+    def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]) -> None:
+        super().__init__(name, environment, kwargs)
+
+        if self.env.machines[self.for_machine].is_darwin():
+            self.is_found = True
+            # FIXME: Use AppleFrameworks dependency
+            self.link_args = ['-framework', 'OpenGL']
+            # FIXME: Detect version using self.clib_compiler
+            return
+        if self.env.machines[self.for_machine].is_windows():
+            self.is_found = True
+            # FIXME: Use self.clib_compiler.find_library()
+            self.link_args = ['-lopengl32']
+            # FIXME: Detect version using self.clib_compiler
+            return
+
+    @staticmethod
+    def get_methods() -> T.List[DependencyMethods]:
+        if mesonlib.is_osx() or mesonlib.is_windows():
+            return [DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM]
+        else:
+            return [DependencyMethods.PKGCONFIG]
+
+    def log_tried(self) -> str:
+        return 'system'
+
+class GnuStepDependency(ConfigToolDependency):
+
+    tools = ['gnustep-config']
+    tool_name = 'gnustep-config'
+
+    def __init__(self, environment: 'Environment', kwargs: T.Dict[str, T.Any]) -> None:
+        super().__init__('gnustep', environment, kwargs, language='objc')
+        if not self.is_found:
+            return
+        self.modules = kwargs.get('modules', [])
+        self.compile_args = self.filter_args(
+            self.get_config_value(['--objc-flags'], 'compile_args'))
+        self.link_args = self.weird_filter(self.get_config_value(
+            ['--gui-libs' if 'gui' in self.modules else '--base-libs'],
+            'link_args'))
+
+    def find_config(self, versions: T.Optional[T.List[str]] = None, returncode: int = 0) -> T.Tuple[T.Optional[T.List[str]], T.Optional[str]]:
+        tool = [self.tools[0]]
+        try:
+            p, out = Popen_safe(tool + ['--help'])[:2]
+        except (FileNotFoundError, PermissionError):
+            return (None, None)
+        if p.returncode != returncode:
+            return (None, None)
+        self.config = tool
+        found_version = self.detect_version()
+        if versions and not version_compare_many(found_version, versions)[0]:
+            return (None, found_version)
+
+        return (tool, found_version)
+
+    @staticmethod
+    def weird_filter(elems: T.List[str]) -> T.List[str]:
+        """When building packages, the output of the enclosing Make is
+        sometimes mixed among the subprocess output. I have no idea why. As a
+        hack filter out everything that is not a flag.
+        """
+        return [e for e in elems if e.startswith('-')]
+
+    @staticmethod
+    def filter_args(args: T.List[str]) -> T.List[str]:
+        """gnustep-config returns a bunch of garbage args such as -O2 and so
+        on. Drop everything that is not needed.
+        """
+        result = []
+        for f in args:
+            if f.startswith('-D') \
+                    or f.startswith('-f') \
+                    or f.startswith('-I') \
+                    or f == '-pthread' \
+                    or (f.startswith('-W') and not f == '-Wall'):
+                result.append(f)
+        return result
+
+    def detect_version(self) -> str:
+        gmake = self.get_config_value(['--variable=GNUMAKE'], 'variable')[0]
+        makefile_dir = self.get_config_value(['--variable=GNUSTEP_MAKEFILES'], 'variable')[0]
+        # This Makefile has the GNUStep version set
+        base_make = os.path.join(makefile_dir, 'Additional', 'base.make')
+        # Print the Makefile variable passed as the argument. For instance, if
+        # you run the make target `print-SOME_VARIABLE`, this will print the
+        # value of the variable `SOME_VARIABLE`.
+        printver = "print-%:\n\t@echo '$($*)'"
+        env = os.environ.copy()
+        # See base.make to understand why this is set
+        env['FOUNDATION_LIB'] = 'gnu'
+        p, o, e = Popen_safe([gmake, '-f', '-', '-f', base_make,
+                              'print-GNUSTEP_BASE_VERSION'],
+                             env=env, write=printver, stdin=subprocess.PIPE)
+        version = o.strip()
+        if not version:
+            mlog.debug("Couldn't detect GNUStep version, falling back to '1'")
+            # Fallback to setting some 1.x version
+            version = '1'
+        return version
+
+
+class SDL2DependencyConfigTool(ConfigToolDependency):
+
+    tools = ['sdl2-config']
+    tool_name = 'sdl2-config'
+
+    def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
+        super().__init__(name, environment, kwargs)
+        if not self.is_found:
+            return
+        self.compile_args = self.get_config_value(['--cflags'], 'compile_args')
+        self.link_args = self.get_config_value(['--libs'], 'link_args')
+
+    @staticmethod
+    def get_methods() -> T.List[DependencyMethods]:
+        if mesonlib.is_osx():
+            return [DependencyMethods.PKGCONFIG, DependencyMethods.CONFIG_TOOL, DependencyMethods.EXTRAFRAMEWORK]
+        else:
+            return [DependencyMethods.PKGCONFIG, DependencyMethods.CONFIG_TOOL]
+
+
+class WxDependency(ConfigToolDependency):
+
+    tools = ['wx-config-3.0', 'wx-config', 'wx-config-gtk3']
+    tool_name = 'wx-config'
+
+    def __init__(self, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
+        super().__init__('WxWidgets', environment, kwargs, language='cpp')
+        if not self.is_found:
+            return
+        self.requested_modules = self.get_requested(kwargs)
+
+        extra_args = []
+        if self.static:
+            extra_args.append('--static=yes')
+
+            # Check to make sure static is going to work
+            err = Popen_safe(self.config + extra_args)[2]
+            if 'No config found to match' in err:
+                mlog.debug('WxWidgets is missing static libraries.')
+                self.is_found = False
+                return
+
+        # wx-config seems to have a cflags as well but since it requires C++,
+        # this should be good, at least for now.
+        self.compile_args = self.get_config_value(['--cxxflags'] + extra_args + self.requested_modules, 'compile_args')
+        self.link_args = self.get_config_value(['--libs'] + extra_args + self.requested_modules, 'link_args')
+
+    @staticmethod
+    def get_requested(kwargs: T.Dict[str, T.Any]) -> T.List[str]:
+        if 'modules' not in kwargs:
+            return []
+        candidates = extract_as_list(kwargs, 'modules')
+        for c in candidates:
+            if not isinstance(c, str):
+                raise DependencyException('wxwidgets module argument is not a string')
+        return candidates
+
+
+class VulkanDependencySystem(SystemDependency):
+
+    def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any], language: T.Optional[str] = None) -> None:
+        super().__init__(name, environment, kwargs, language=language)
+
+        try:
+            self.vulkan_sdk = os.environ['VULKAN_SDK']
+            if not os.path.isabs(self.vulkan_sdk):
+                raise DependencyException('VULKAN_SDK must be an absolute path.')
+        except KeyError:
+            self.vulkan_sdk = None
+
+        if self.vulkan_sdk:
+            # TODO: this config might not work on some platforms, fix bugs as reported
+            # we should at least detect other 64-bit platforms (e.g. armv8)
+            lib_name = 'vulkan'
+            lib_dir = 'lib'
+            inc_dir = 'include'
+            if mesonlib.is_windows():
+                lib_name = 'vulkan-1'
+                lib_dir = 'Lib32'
+                inc_dir = 'Include'
+                if detect_cpu_family(self.env.coredata.compilers.host) == 'x86_64':
+                    lib_dir = 'Lib'
+
+            # make sure header and lib are valid
+            inc_path = os.path.join(self.vulkan_sdk, inc_dir)
+            header = os.path.join(inc_path, 'vulkan', 'vulkan.h')
+            lib_path = os.path.join(self.vulkan_sdk, lib_dir)
+            find_lib = self.clib_compiler.find_library(lib_name, environment, [lib_path])
+
+            if not find_lib:
+                raise DependencyException('VULKAN_SDK point to invalid directory (no lib)')
+
+            if not os.path.isfile(header):
+                raise DependencyException('VULKAN_SDK point to invalid directory (no include)')
+
+            # XXX: this is very odd, and may deserve being removed
+            self.type_name = DependencyTypeName('vulkan_sdk')
+            self.is_found = True
+            self.compile_args.append('-I' + inc_path)
+            self.link_args.append('-L' + lib_path)
+            self.link_args.append('-l' + lib_name)
+
+            # TODO: find a way to retrieve the version from the sdk?
+            # Usually it is a part of the path to it (but does not have to be)
+            return
+        else:
+            # simply try to guess it, usually works on linux
+            libs = self.clib_compiler.find_library('vulkan', environment, [])
+            if libs is not None and self.clib_compiler.has_header('vulkan/vulkan.h', '', environment, disable_cache=True)[0]:
+                self.is_found = True
+                for lib in libs:
+                    self.link_args.append(lib)
+                return
+
+    @staticmethod
+    def get_methods() -> T.List[DependencyMethods]:
+        return [DependencyMethods.SYSTEM]
+
+    def log_tried(self) -> str:
+        return 'system'
+
+gl_factory = DependencyFactory(
+    'gl',
+    [DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM],
+    system_class=GLDependencySystem,
+)
+
+sdl2_factory = DependencyFactory(
+    'sdl2',
+    [DependencyMethods.PKGCONFIG, DependencyMethods.CONFIG_TOOL, DependencyMethods.EXTRAFRAMEWORK],
+    configtool_class=SDL2DependencyConfigTool,
+)
+
+vulkan_factory = DependencyFactory(
+    'vulkan',
+    [DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM],
+    system_class=VulkanDependencySystem,
+)