Allow meson wrapper to use backends other than ninja

conans/client/build/meson.py

@@ -185,10 +185,7 @@ def _build():
         else:
             _build()
 
-    def _run_ninja_targets(self, args=None, build_dir=None, targets=None):
-        if self.backend != "ninja":
-            raise ConanException("Build only supported with 'ninja' backend")
-
+    def _run_meson_targets(self, args=None, build_dir=None, targets=None):
         args = args or []
         build_dir = build_dir or self.build_dir or self._conanfile.build_folder
 
@@ -197,7 +194,10 @@ def _run_ninja_targets(self, args=None, build_dir=None, targets=None):
             args_to_string(args),
             args_to_string(targets)
         ])
-        self._run("ninja %s" % arg_list)
+        # FIXME: We are assuming for other backends that meson version is > 0.55.0
+        #        so you can use new command "meson compile"
+        command = "ninja" if self.backend == "ninja" else "meson compile"
+        self._run("%s %s" % (command, arg_list))
 
     def _run_meson_command(self, subcommand=None, args=None, build_dir=None):
         args = args or []
@@ -214,7 +214,7 @@ def build(self, args=None, build_dir=None, targets=None):
         if not self._conanfile.should_build:
             return
         conan_v2_error("build_type setting should be defined.", not self._build_type)
-        self._run_ninja_targets(args=args, build_dir=build_dir, targets=targets)
+        self._run_meson_targets(args=args, build_dir=build_dir, targets=targets)
 
     def install(self, args=None, build_dir=None):
         if not self._conanfile.should_install:
@@ -223,15 +223,15 @@ def install(self, args=None, build_dir=None):
         if not self.options.get('prefix'):
             raise ConanException("'prefix' not defined for 'meson.install()'\n"
                                  "Make sure 'package_folder' is defined")
-        self._run_ninja_targets(args=args, build_dir=build_dir, targets=["install"])
+        self._run_meson_targets(args=args, build_dir=build_dir, targets=["install"])
 
     def test(self, args=None, build_dir=None, targets=None):
         if not self._conanfile.should_test or not get_env("CONAN_RUN_TESTS", True) or \
            self._conanfile.conf["tools.build:skip_test"]:
             return
         if not targets:
             targets = ["test"]
-        self._run_ninja_targets(args=args, build_dir=build_dir, targets=targets)
+        self._run_meson_targets(args=args, build_dir=build_dir, targets=targets)
 
     def meson_install(self, args=None, build_dir=None):
         if not self._conanfile.should_install:

conans/test/unittests/client/build/meson_test.py

@@ -183,6 +183,21 @@ def test_folders(self):
         self.assertEqual("meson install -C \"%s\"" % build_expected,
                          conan_file.command)
 
+    def test_other_backend(self):
+        conan_file = ConanFileMock()
+        conan_file.deps_cpp_info = MockDepsCppInfo()
+        conan_file.settings = Settings()
+        conan_file.folders.set_base_package(os.getcwd())
+        meson = Meson(conan_file, backend="vs")
+        meson.configure()
+        self.assertIn("--backend=vs", conan_file.command)
+        meson.build()
+        self.assertIn("meson compile -C", conan_file.command)
+        meson.install()
+        self.assertIn("meson compile -C", conan_file.command)
+        meson.test()
+        self.assertIn("meson compile -C", conan_file.command)
+
     def test_prefix(self):
         conan_file = ConanFileMock()
         conan_file.deps_cpp_info = MockDepsCppInfo()