Only check for a bold instance on fonts where the weight range extends to 700.

On the OpenType Profile
com.google.fonts/check/varfont/bold_wght_coord
(issue #4373)

Author: simoncozens

CHANGELOG.md

@@ -11,6 +11,8 @@ A more detailed list of changes is available in the corresponding milestones for
   - **[com.google.fonts/check/varfont/duplexed_axis_reflow]:** yield FAILs per incorrect axis (message codes specifying axis); sort the list of bad glyphs (PR #4400)
   - **[com.google.fonts/check/legacy_accents]:** We changed our minds here, and removed the overide to FAIL on "legacy-accents-component", so it is back a mere WARN again, just like in the Universal Profile (issue #4425)
   - **[com.google.fonts/check/font_copyright]:** Accept date ranges. (issue #4386)
+#### On the OpenType Profile
+  - **[com.google.fonts/check/varfont/bold_wght_coord]:** Only check for a bold instance on fonts where the weight range extends to 700. (issue #4373)
 
 
 ## 0.10.9 (2024-Jan-12)

Lib/fontbakery/profiles/fvar.py

@@ -190,8 +190,13 @@ def com_google_fonts_check_varfont_bold_wght_coord(ttFont, bold_wght_coord):
     The variable font 'wght' (Weight) axis coordinate must be 700 on the 'Bold'
     instance.
     """
+    from .shared_conditions import wght_axis
 
+    wght = wght_axis(ttFont)
     if bold_wght_coord is None:
+        if wght and wght.maxValue < 700:
+            yield SKIP, Message("no-bold-weight", "Weight axis doesn't go up to bold")
+            return
         yield FAIL, Message("no-bold-instance", '"Bold" instance not present.')
     elif bold_wght_coord == 700:
         yield PASS, "Bold:wght is 700."

Lib/fontbakery/profiles/shared_conditions.py

@@ -376,6 +376,14 @@ def grad_axis(ttFont):
                 return axis
 
 
+@condition
+def wght_axis(ttFont):
+    if "fvar" in ttFont:
+        for axis in ttFont["fvar"].axes:
+            if axis.axisTag == "wght":
+                return axis
+
+
 def get_axis_tags_set(ttFont):
     return set(axis.axisTag for axis in ttFont["fvar"].axes)
 

tests/profiles/fvar_test.py

@@ -275,6 +275,12 @@ def test_check_varfont_bold_wght_coord():
         check(ttFont), FAIL, "wght-not-700", "with a bad Bold:wght coordinage (600)..."
     )
 
+    # Check we skip when we don't have a 700 weight.
+    ttFont = TTFont("data/test/cabinvfbeta/CabinVFBeta.ttf")
+    del ttFont["fvar"].instances[3]
+    ttFont["fvar"].axes[0].maxValue = 600
+    assert_results_contain(check(ttFont), SKIP, "no-bold-weight")
+
 
 def test_check_varfont_wght_valid_range():
     """The variable font 'wght' (Weight) axis coordinate