[Qt module] Added lrelease detection

Just detect lrelease as done with other Qt tools.
Uses -version instead of -v to probe version since lrelease don't
support it.

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

mesonbuild/dependencies/ui.py

@@ -207,13 +207,15 @@ class QtBaseDependency(ExternalDependency):
             moc = ExternalProgram(os.path.join(self.bindir, 'moc'), silent=True)
             uic = ExternalProgram(os.path.join(self.bindir, 'uic'), silent=True)
             rcc = ExternalProgram(os.path.join(self.bindir, 'rcc'), silent=True)
+            lrelease = ExternalProgram(os.path.join(self.bindir, 'lrelease'), silent=True)
         else:
             # We don't accept unsuffixed 'moc', 'uic', and 'rcc' because they
             # are sometimes older, or newer versions.
             moc = ExternalProgram('moc-' + self.name, silent=True)
             uic = ExternalProgram('uic-' + self.name, silent=True)
             rcc = ExternalProgram('rcc-' + self.name, silent=True)
-        return moc, uic, rcc
+            lrelease = ExternalProgram('lrelease-' + self.name, silent=True)
+        return moc, uic, rcc, lrelease
 
     def _pkgconfig_detect(self, mods, kwargs):
         # We set the value of required to False so that we can try the

mesonbuild/modules/qt.py

@@ -43,13 +43,13 @@ class QtBaseModule:
         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()
+        self.moc, self.uic, self.rcc, self.lrelease = 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?
-        for compiler, compiler_name in ((self.moc, "Moc"), (self.uic, "Uic"), (self.rcc, "Rcc")):
+        for compiler, compiler_name in ((self.moc, "Moc"), (self.uic, "Uic"), (self.rcc, "Rcc"), (self.lrelease, "lrelease")):
             if compiler.found():
-                stdout, stderr = Popen_safe(compiler.get_command() + ['-v'])[1:3]
+                stdout, stderr = Popen_safe(compiler.get_command() + ['-version'])[1:3]
                 stdout = stdout.strip()
                 stderr = stderr.strip()
                 if 'Qt {}'.format(self.qt_version) in stderr: