Moved the introspection interpreter

1 files changed, 125 insertions, 0 deletions

diff --git a/mesonbuild/ast/introspection.py b/mesonbuild/ast/introspection.py
new file mode 100644
index 0000000..f21788c
--- /dev/null
+++ b/mesonbuild/ast/introspection.py
@@ -0,0 +1,125 @@
+# Copyright 2018 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 class contains the basic functionality needed to run any interpreter
+# or an interpreter-based tool
+
+from . import AstInterpreter
+from .. import compilers, environment, mesonlib, mparser, optinterpreter
+from .. import coredata as cdata
+from ..interpreterbase import InvalidArguments
+
+import os
+
+class IntrospectionHelper:
+    # mimic an argparse namespace
+    def __init__(self, cross_file):
+        self.cross_file = cross_file
+        self.native_file = None
+        self.cmd_line_options = {}
+
+class IntrospectionInterpreter(AstInterpreter):
+    # Interpreter to detect the options without a build directory
+    # Most of the code is stolen from interperter.Interpreter
+    def __init__(self, source_root, subdir, backend, cross_file=None, subproject='', subproject_dir='subprojects', env=None):
+        super().__init__(source_root, subdir)
+
+        options = IntrospectionHelper(cross_file)
+        self.cross_file = cross_file
+        if env is None:
+            self.environment = environment.Environment(source_root, None, options)
+        else:
+            self.environment = env
+        self.subproject = subproject
+        self.subproject_dir = subproject_dir
+        self.coredata = self.environment.get_coredata()
+        self.option_file = os.path.join(self.source_root, self.subdir, 'meson_options.txt')
+        self.backend = backend
+        self.default_options = {'backend': self.backend}
+        self.project_data = {}
+
+        self.funcs.update({
+            'project': self.func_project,
+            'add_languages': self.func_add_languages
+        })
+
+    def func_project(self, node, args, kwargs):
+        if len(args) < 1:
+            raise InvalidArguments('Not enough arguments to project(). Needs at least the project name.')
+
+        proj_name = args[0]
+        proj_vers = kwargs.get('version', 'undefined')
+        proj_langs = self.flatten_args(args[1:])
+        if isinstance(proj_vers, mparser.ElementaryNode):
+            proj_vers = proj_vers.value
+        if not isinstance(proj_vers, str):
+            proj_vers = 'undefined'
+        self.project_data = {'descriptive_name': proj_name, 'version': proj_vers}
+
+        if os.path.exists(self.option_file):
+            oi = optinterpreter.OptionInterpreter(self.subproject)
+            oi.process(self.option_file)
+            self.coredata.merge_user_options(oi.options)
+
+        def_opts = self.flatten_args(kwargs.get('default_options', []))
+        self.project_default_options = mesonlib.stringlistify(def_opts)
+        self.project_default_options = cdata.create_options_dict(self.project_default_options)
+        self.default_options.update(self.project_default_options)
+        self.coredata.set_default_options(self.default_options, self.subproject, self.environment.cmd_line_options)
+
+        if not self.is_subproject() and 'subproject_dir' in kwargs:
+            spdirname = kwargs['subproject_dir']
+            if isinstance(spdirname, str):
+                self.subproject_dir = spdirname
+        if not self.is_subproject():
+            self.project_data['subprojects'] = []
+            subprojects_dir = os.path.join(self.source_root, self.subproject_dir)
+            if os.path.isdir(subprojects_dir):
+                for i in os.listdir(subprojects_dir):
+                    if os.path.isdir(os.path.join(subprojects_dir, i)):
+                        self.do_subproject(i)
+
+        self.coredata.init_backend_options(self.backend)
+        options = {k: v for k, v in self.environment.cmd_line_options.items() if k.startswith('backend_')}
+
+        self.coredata.set_options(options)
+        self.func_add_languages(None, proj_langs, None)
+
+    def do_subproject(self, dirname):
+        subproject_dir_abs = os.path.join(self.environment.get_source_dir(), self.subproject_dir)
+        subpr = os.path.join(subproject_dir_abs, dirname)
+        try:
+            subi = IntrospectionInterpreter(subpr, '', self.backend, cross_file=self.cross_file, subproject=dirname, subproject_dir=self.subproject_dir, env=self.environment)
+            subi.analyze()
+            subi.project_data['name'] = dirname
+            self.project_data['subprojects'] += [subi.project_data]
+        except:
+            return
+
+    def func_add_languages(self, node, args, kwargs):
+        args = self.flatten_args(args)
+        need_cross_compiler = self.environment.is_cross_build()
+        for lang in sorted(args, key=compilers.sort_clink):
+            lang = lang.lower()
+            if lang not in self.coredata.compilers:
+                self.environment.detect_compilers(lang, need_cross_compiler)
+
+    def is_subproject(self):
+        return self.subproject != ''
+
+    def analyze(self):
+        self.load_root_meson_file()
+        self.sanity_check_ast()
+        self.parse_project()
+        self.run()