Add command line script

Lib/extractor/__init__.py

@@ -75,3 +75,66 @@ def extractUFO(
         raise ExtractorError(
             "There was an error reading the %s file." % format
         )
+
+
+def cmdline():
+    """
+    Extract one ore more fonts to UFO. Installed as command line script
+    `extractufo`.
+
+    Usage: extractufo font [font ...]
+    """
+    import os
+    from sys import exit
+    from argparse import ArgumentParser
+
+    parser = ArgumentParser(
+        description="Extract data from font binaries and build UFO objects from them.",
+        epilog="Each resulting UFO will be saved as FONT_FILE.ufo(z) in the same directory as the original FONT_FILE. "
+               "If destination file or directory already exists, conversion for that source file will be skipped and the application exit code will indicate an error.",
+    )
+    parser.add_argument('FONT_FILE', help='Input font path', nargs="+")
+    parser.add_argument('-m', '--ufo-module', choices=['ufoLib2', 'defcon'],
+                        help='Select the default library for writing UFOs (default: autodetect, prefer ufoLib2)')
+    parser.add_argument('-z', '--zip', action="store_true", help="Output UFO ZIP")
+
+    args = parser.parse_args()
+    if args.ufo_module is None:
+        try:
+            from ufoLib2 import Font
+            print("Will use ufoLib2 for UFO output.")
+        except ImportError:
+            try:
+                from defcon import Font
+                print("Will use defcon for UFO output.")
+            except ImportError:
+                print("Either ufoLib2 or, alternatively, defcon library is required to run this command.\nPlease install one of them.")
+                exit(1)
+    elif args.ufo_module == 'ufoLib2':
+        try:
+            from ufoLib2 import Font
+        except ImportError:
+            print("Can't find ufoLib2 installed. Please install it or specify a different UFO library.")
+            exit(1)
+    else:
+        try:
+            from defcon import Font
+        except ImportError:
+            print("Can't find defcon installed. Please install it or specify a different UFO library.")
+            exit(1)
+
+    structure = "zip" if args.zip else "package"
+    had_write_errors = False
+    for font_path in args.FONT_FILE:
+        ufo_path = f"{font_path}.ufo" if not args.zip else f"{font_path}.ufoz"
+        print(f"Extracting {ufo_path}... ", end="")
+        if os.path.exists(ufo_path):
+            print("path already exists, skipping.")
+            had_write_errors = True
+            continue
+        ufo = Font()
+        extractUFO(font_path, ufo)
+        ufo.save(ufo_path, structure=structure)
+        print("done.")
+
+    exit(had_write_errors)

setup.py

@@ -29,6 +29,11 @@
           "write_to": 'Lib/extractor/_version.py',
           "write_to_template": '__version__ = "{version}"',
      },
+    entry_points={
+        "console_scripts": [
+            "extractufo = extractor:cmdline",
+        ]
+    },
     setup_requires=pytest_runner + wheel + ['setuptools_scm'],
     tests_require=[
         'pytest>=3.0.3',
@@ -39,6 +44,7 @@
     ],
     extras_require={
         "vfb": ["vfbLib>=0.7.1"],
+        "script": ["ufoLib2"],
     },
     classifiers=[
         "Development Status :: 4 - Beta",