fontbuild: adds support for post-processing directives on a per-glyph basis. Add "!post:DIRECTIVE" in glyph notes. Only supported directive is "removeoverlaps"

misc/fontbuild

@@ -25,10 +25,11 @@ from fontTools.pens.reverseContourPen import ReverseContourPen
 from glyphsLib.interpolation import apply_instance_data
 from mutatorMath.ufo.document import DesignSpaceDocumentReader
 from multiprocessing import Process, Queue
-# from ufo2ft.filters.removeOverlaps import RemoveOverlapsFilter
+from ufo2ft.filters.removeOverlaps import RemoveOverlapsFilter
 
 log = logging.getLogger(__name__)
 stripItalic_re = re.compile(r'(?:^|\b)italic(?:\b|$)', re.I | re.U)
+findPost_re = re.compile(r'\!post:([^ ]+)', re.I | re.U)
 
 
 def stripItalic(name):
@@ -77,6 +78,26 @@ def composedGlyphIsNonTrivial(g, yAxisIsNonTrivial=False):
   return False
 
 
+knownDirectives = set([
+  'removeoverlap',
+])
+
+
+def findGlyphDirectives(g): # -> set<string> | None
+  directives = set()
+  if g.note and len(g.note) > 0:
+    for directive in findPost_re.findall(g.note):
+      directive = directive.lower()
+      if directive in knownDirectives:
+        directives.add(directive)
+      else:
+        print(
+          'unknown glyph directive !post:%s in glyph %s' % (directive, g.name),
+          file=sys.stderr
+        )
+  return directives
+
+
 class VarFontProject(FontProject):
   def decompose_glyphs(self, ufos, glyph_filter=lambda g: True):
     """Move components of UFOs' glyphs to their outlines."""
@@ -100,29 +121,42 @@ class VarFontProject(FontProject):
       # the contour direction of the component
       xx, xy, yx, yy = transformation[:4]
       if xx*yy - xy*yx < 0:
-          pen = ReverseContourPen(pen)
+        pen = ReverseContourPen(pen)
       component.draw(pen)
 
   def build_interpolatable_ttfs(self, ufos, **kwargs):
     """Build OpenType binaries with interpolatable TrueType outlines."""
     # We decompose any glyph with two or more components to make sure
     # that fontTools varLib is able to produce properly-slanting interpolation.
-    
+
     decomposeGlyphs = set()
+    removeOverlapsGlyphs = set()
+
     for ufo in ufos:
       updateFontVersion(ufo)
       isItalic = ufo.info.italicAngle != 0
-      for glyph in ufo:
-        if glyph.components and composedGlyphIsNonTrivial(glyph, yAxisIsNonTrivial=isItalic):
-          decomposeGlyphs.add(glyph.name)
+      ufoname = basename(ufo.path)
+      for g in ufo:
+        directives = findGlyphDirectives(g)
+        if g.components and composedGlyphIsNonTrivial(g, yAxisIsNonTrivial=isItalic):
+          decomposeGlyphs.add(g.name)
+        if 'removeoverlap' in directives:
+          if g.components and len(g.components) > 0:
+            decomposeGlyphs.add(g.name)
+          removeOverlapsGlyphs.add(g)
 
     self.decompose_glyphs(ufos, lambda g: g.name in decomposeGlyphs)
 
-    # for ufo in ufos:
-    #   filter = RemoveOverlapsFilter(backend='pathops')
-    #   filter.start()
-    #   for g in ufo:
-    #     filter.filter(g)
+    if len(removeOverlapsGlyphs) > 0:
+      rmoverlapFilter = RemoveOverlapsFilter(backend='pathops')
+      rmoverlapFilter.start()
+      for g in removeOverlapsGlyphs:
+        log.info(
+          'Removing overlaps in glyph "%s" of %s',
+          g.name,
+          basename(g.getParent().path)
+        )
+        rmoverlapFilter.filter(g)
 
     self.save_otfs(ufos, ttf=True, interpolatable=True, **kwargs)
 
@@ -268,6 +302,7 @@ class Main(object):
 
     # parse CLI arguments
     args = argparser.parse_args(argv[1:i])
+    logFormat = '%(funcName)s: %(message)s'
     if args.quiet:
       self.quiet = True
       if args.debug:
@@ -275,13 +310,14 @@ class Main(object):
       if args.verbose:
         fatal("--quiet and --verbose are mutually exclusive arguments")
     elif args.debug:
-      logging.basicConfig(level=logging.DEBUG)
+      logging.basicConfig(level=logging.DEBUG, format=logFormat)
       self.logLevelName = 'DEBUG'
     elif args.verbose:
-      logging.basicConfig(level=logging.INFO)
+      logging.basicConfig(level=logging.INFO, format=logFormat)
       self.logLevelName = 'INFO'
     else:
-      logging.basicConfig(level=logging.WARNING)
+      logFormat = '%(message)s'
+      logging.basicConfig(level=logging.WARNING, format=logFormat)
       self.logLevelName = 'WARNING'
 
     if args.chdir: