How to use the fontmake.__main__.main function in fontmake

def test_shared_features_expansion(data_dir, tmp_path):
    shutil.copytree(data_dir / "DesignspaceTestSharedFeatures", tmp_path / "sources")

    fontmake.__main__.main(
        [
            "-m",
            str(tmp_path / "sources" / "DesignspaceTestSharedFeatures.designspace"),
            "-i",
            "--expand-features-to-instances",
            "-o",
            "ttf",
            "--output-dir",
            str(tmp_path),
        ]
    )

    test_feature_file = (
        tmp_path / "sources/instance_ufo/DesignspaceTest-Light.ufo/features.fea"
    )
    assert test_feature_file.read_text() == "# test"

def test_shared_features_ufo(data_dir, tmp_path):
    shutil.copytree(data_dir / "DesignspaceTestSharedFeatures", tmp_path / "sources")

    fontmake.__main__.main(
        [
            "-u",
            str(tmp_path / "sources" / "DesignspaceTest-Light.ufo"),
            str(tmp_path / "sources" / "DesignspaceTest-Regular.ufo"),
            "-o",
            "ttf",
            "--output-dir",
            str(tmp_path),
        ]
    )

    assert {p.name for p in tmp_path.glob("*.*")} == {
        "DesignspaceTest-Light.ttf",
        "DesignspaceTest-Regular.ttf",
    }

def test_variable_otf(data_dir, tmp_path):
    shutil.copytree(data_dir / "DesignspaceTest", tmp_path / "sources")

    fontmake.__main__.main(
        [
            "-m",
            str(tmp_path / "sources" / "DesignspaceTest.designspace"),
            "-o",
            "variable-cff2",
            "--output-dir",
            str(tmp_path),
        ]
    )

    assert {p.name for p in tmp_path.glob("*.*")} == {"DesignspaceTest-VF.otf"}

def test_interpolation_and_masters_as_instances(data_dir, tmp_path):
    shutil.copytree(data_dir / "DesignspaceTest", tmp_path / "sources")

    fontmake.__main__.main(
        [
            "-m",
            str(tmp_path / "sources" / "DesignspaceTest.designspace"),
            "-i",
            "-M",
            "--output-dir",
            str(tmp_path),
        ]
    )

    assert {p.name for p in tmp_path.glob("*.*")} == {
        "MyFont-Bold.otf",
        "MyFont-Bold.ttf",
        "MyFont-Light.otf",
        "MyFont-Light.ttf",
        "MyFont-Regular.otf",

designspace = designspaceLib.DesignSpaceDocument.fromfile(
        tmp_path / "master_ufos" / "GlyphsUnitTestSans.designspace"
    )

    assert "public.skipExportGlyphs" in designspace.lib
    assert designspace.lib["public.skipExportGlyphs"] == [
        "_part.shoulder",
        "_part.stem",
    ]
    for path in (tmp_path / "master_ufos").glob("*.ufo"):
        with ufoLib2.Font.open(path) as ufo:
            assert "public.skipExportGlyphs" in ufo.lib

    shutil.rmtree(tmp_path / "master_ufos")

    fontmake.__main__.main(args + ["--no-write-skipexportglyphs"])

    designspace = designspaceLib.DesignSpaceDocument.fromfile(
        tmp_path / "master_ufos" / "GlyphsUnitTestSans.designspace"
    )
    assert "public.skipExportGlyphs" not in designspace.lib

    for path in (tmp_path / "master_ufos").glob("*.ufo"):
        with ufoLib2.Font.open(path) as ufo:
            assert "public.skipExportGlyphs" not in ufo.lib
            assert not ufo["_part.shoulder"].lib["com.schriftgestaltung.Glyphs.Export"]
            assert not ufo["_part.stem"].lib["com.schriftgestaltung.Glyphs.Export"]

"--master-dir",
        str(tmp_path / "master_ufos"),
        "--instance-dir",
        str(tmp_path / "instance_ufos"),
        "-i",
        "Test Subset Regular",
        "-o",
        "ttf",
        "otf",
        "--output-dir",
        str(tmp_path),
    ]
    if not write_skipexportglyphs:
        args.append("--no-write-skipexportglyphs")

    fontmake.__main__.main(args)

    for output_format in ("ttf", "otf"):
        for font_path in tmp_path.glob("*." + output_format):
            font = fontTools.ttLib.TTFont(font_path)
            assert font.getGlyphOrder() == [".notdef", "space", "A", "C"]

def test_masters_and_instances_ttf_interpolatable(data_dir, tmp_path):
    shutil.copytree(data_dir / "DesignspaceTest", tmp_path / "sources")

    fontmake.__main__.main(
        [
            "-m",
            str(tmp_path / "sources" / "DesignspaceTest.designspace"),
            "-o",
            "ttf-interpolatable",
            "--output-dir",
            str(tmp_path),
        ]
    )

    assert {p.name for p in tmp_path.glob("*.*")} == {
        "MyFont-Bold.ttf",
        "MyFont-Light.ttf",
        "DesignspaceTest.designspace",
    }