Factorized Qt4 and Qt5 modules in one base class.

Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

1 files changed, 163 insertions, 0 deletions

diff --git a/mesonbuild/modules/qt.py b/mesonbuild/modules/qt.py
new file mode 100644
index 0000000..39190b1
--- /dev/null
+++ b/mesonbuild/modules/qt.py
@@ -0,0 +1,163 @@
+# Copyright 2015 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.
+
+import os
+from .. import mlog
+from .. import build
+from ..mesonlib import MesonException, Popen_safe, extract_as_list
+from ..dependencies import Qt4Dependency, Qt5Dependency
+import xml.etree.ElementTree as ET
+from . import ModuleReturnValue, get_include_args
+from ..interpreterbase import permittedKwargs
+
+_QT_DEPS_LUT = {
+    4: Qt4Dependency,
+    5: Qt5Dependency
+}
+
+
+class QtBaseModule:
+    tools_detected = False
+
+    def __init__(self, qt_version=5):
+        self.qt_version = qt_version
+
+    def _detect_tools(self, env, method):
+        if self.tools_detected:
+            return
+        mlog.log('Detecting Qt{version} tools'.format(version=self.qt_version))
+        # FIXME: We currently require QtX to exist while importing the module.
+        # We should make it gracefully degrade and not create any targets if
+        # the import is marked as 'optional' (not implemented yet)
+        kwargs = {'required': 'true', 'modules': 'Core', 'silent': 'true', 'method': method}
+        qt = _QT_DEPS_LUT[self.qt_version](env, kwargs)
+        # Get all tools and then make sure that they are the right version
+        self.moc, self.uic, self.rcc = qt.compilers_detect()
+        # Moc, uic and rcc write their version strings to stderr.
+        # Moc and rcc return a non-zero result when doing so.
+        # What kind of an idiot thought that was a good idea?
+        if self.moc.found():
+            stdout, stderr = Popen_safe(self.moc.get_command() + ['-v'])[1:3]
+            stdout = stdout.strip()
+            stderr = stderr.strip()
+            if 'Qt {}'.format(self.qt_version) in stderr:
+                moc_ver = stderr
+            elif ' {}.'.format(self.qt_version) in stdout:
+                moc_ver = stdout
+            else:
+                raise MesonException('Moc preprocessor is not for Qt {version}. Output:\n{stdo}\n{stderr}'.format(
+                    version=self.qt_version, stdo=stdout, stderr=stderr))
+            mlog.log(' moc:', mlog.green('YES'), '({path}, {version})'.format(
+                path=self.moc.get_path(), version=moc_ver.split()[-1]))
+        else:
+            mlog.log(' moc:', mlog.red('NO'))
+        if self.uic.found():
+            stdout, stderr = Popen_safe(self.uic.get_command() + ['-v'])[1:3]
+            stdout = stdout.strip()
+            stderr = stderr.strip()
+            if 'version {}.'.format(self.qt_version) in stderr:
+                uic_ver = stderr
+            elif ' {}.'.format(self.qt_version) in stdout:
+                uic_ver = stdout
+            else:
+                raise MesonException('Uic compiler is not for Qt {version}. Output:\n{stdo}\n{stderr}'.format(
+                    version=self.qt_version, stdo=stdout, stderr=stderr))
+            mlog.log(' uic:', mlog.green('YES'), '(%s, %s)' %
+                     (self.uic.get_path(), uic_ver.split()[-1]))
+        else:
+            mlog.log(' uic:', mlog.red('NO'))
+        if self.rcc.found():
+            stdout, stderr = Popen_safe(self.rcc.get_command() + ['-v'])[1:3]
+            stdout = stdout.strip()
+            stderr = stderr.strip()
+            if 'version {}.'.format(self.qt_version) in stderr:
+                rcc_ver = stderr
+            elif ' {}.'.format(self.qt_version) in stdout:
+                rcc_ver = stdout
+            else:
+                raise MesonException('Rcc compiler is not for Qt {version}. Output:\n{stdo}\n{stderr}'.format(
+                    version=self.qt_version, stdo=stdout, stderr=stderr))
+            mlog.log(' rcc:', mlog.green('YES'), '(%s, %s)'
+                     % (self.rcc.get_path(), rcc_ver.split()[-1]))
+        else:
+            mlog.log(' rcc:', mlog.red('NO'))
+        self.tools_detected = True
+
+    def parse_qrc(self, state, fname):
+        abspath = os.path.join(state.environment.source_dir, state.subdir, fname)
+        relative_part = os.path.split(fname)[0]
+        try:
+            tree = ET.parse(abspath)
+            root = tree.getroot()
+            result = []
+            for child in root[0]:
+                if child.tag != 'file':
+                    mlog.warning("malformed rcc file: ", os.path.join(state.subdir, fname))
+                    break
+                else:
+                    result.append(os.path.join(state.subdir, relative_part, child.text))
+            return result
+        except Exception:
+            return []
+
+    @permittedKwargs({'moc_headers', 'moc_sources', 'include_directories', 'ui_files', 'qresources', 'method'})
+    def preprocess(self, state, args, kwargs):
+        rcc_files, ui_files, moc_headers, moc_sources, sources, include_directories \
+            = extract_as_list(kwargs, 'qresources', 'ui_files', 'moc_headers', 'moc_sources', 'sources', 'include_directories', pop = True)
+        sources += args[1:]
+        method = kwargs.get('method', 'auto')
+        self._detect_tools(state.environment, method)
+        err_msg = "{0} sources specified and couldn't find {1}, " \
+                  "please check your qt{2} installation"
+        if len(moc_headers) + len(moc_sources) > 0 and not self.moc.found():
+            raise MesonException(err_msg.format('MOC', 'moc-qt{}'.format(self.qt_version), self.qt_version))
+        if len(rcc_files) > 0:
+            if not self.rcc.found():
+                raise MesonException(err_msg.format('RCC', 'rcc-qt{}'.format(self.qt_version), self.qt_version))
+            qrc_deps = []
+            for i in rcc_files:
+                qrc_deps += self.parse_qrc(state, i)
+            if len(args) > 0:
+                name = args[0]
+            else:
+                basename = os.path.split(rcc_files[0])[1]
+                name = 'qt' + str(self.qt_version) + '-' + basename.replace('.', '_')
+            rcc_kwargs = {'input': rcc_files,
+                          'output': name + '.cpp',
+                          'command': [self.rcc, '-o', '@OUTPUT@', '@INPUT@'],
+                          'depend_files': qrc_deps}
+            res_target = build.CustomTarget(name, state.subdir, rcc_kwargs)
+            sources.append(res_target)
+        if len(ui_files) > 0:
+            if not self.uic.found():
+                raise MesonException(err_msg.format('UIC', 'uic-qt' + self.qt_version))
+            ui_kwargs = {'output': 'ui_@BASENAME@.h',
+                         'arguments': ['-o', '@OUTPUT@', '@INPUT@']}
+            ui_gen = build.Generator([self.uic], ui_kwargs)
+            ui_output = ui_gen.process_files('Qt{} ui'.format(self.qt_version), ui_files, state)
+            sources.append(ui_output)
+        inc = get_include_args(include_dirs=include_directories)
+        if len(moc_headers) > 0:
+            moc_kwargs = {'output': 'moc_@BASENAME@.cpp',
+                          'arguments': inc + ['@INPUT@', '-o', '@OUTPUT@']}
+            moc_gen = build.Generator([self.moc], moc_kwargs)
+            moc_output = moc_gen.process_files('Qt{} moc header'.format(self.qt_version), moc_headers, state)
+            sources.append(moc_output)
+        if len(moc_sources) > 0:
+            moc_kwargs = {'output': '@BASENAME@.moc',
+                          'arguments': ['@INPUT@', '-o', '@OUTPUT@']}
+            moc_gen = build.Generator([self.moc], moc_kwargs)
+            moc_output = moc_gen.process_files('Qt{} moc source'.format(self.qt_version), moc_sources, state)
+            sources.append(moc_output)
+        return ModuleReturnValue(sources, sources)