Fix Fixed custom building when not using derivation (#1428)

doc/custom-build.md

@@ -73,7 +73,8 @@ Inside the plan, top-level properties include:
         - `U+27F6` LONG RIGHTWARDS ARROW
         - `U+27FB` LONG LEFTWARDS ARROW FROM BAR
         - `U+27FC` LONG RIGHTWARDS ARROW FROM BAR
-  - `fixed`: Apply `fontconfig-mono` changes and further remove ligations, `NWID` and `WWID` typographic features.
+    - Remove `NWID` and `WWID` features typographic features
+  - `fixed`: Apply `fontconfig-mono` changes and further remove ligations.
 * `serifs`: Optional, String, configures style of serifs.
   - When set to `slab`, the font will be converted into slab-serif.
   - Otherwise the font will be sans-serif.

font-src/otl/gsub-cv-ss.ptl

@@ -13,7 +13,6 @@ define [CvLookupName tag]  : 'lookup_cv_' + tag
 define [SsLookupName tag]  : 'lookup_ss_' + tag
 
 export : define [buildCVSS sink para glyphStore] : begin
-	if [not para.enableCvSs] : return nothing
 	define {chain-rule} : ChainRuleBuilder sink
 
 	local rec : BeginLookupBlock sink

font-src/otl/index.ptl

@@ -22,6 +22,7 @@ define [buildGSUB para glyphStore markGlyphs] : begin
 	define gsub : CreateEmptyTable
 
 	# NWID / WWID
+	if para.enableNwidWwid : begin
 		buildGrFeature gsub glyphStore Gr.Nwid
 		buildGrFeature gsub glyphStore Gr.Wwid
 
@@ -30,6 +31,7 @@ define [buildGSUB para glyphStore markGlyphs] : begin
 	buildGrFeature gsub glyphStore Gr.Onum
 
 	# APLF
+	if para.enableCvSs : begin
 		buildGrFeature gsub glyphStore Gr.AplForm
 
 	# numr / dnom
@@ -53,6 +55,7 @@ define [buildGSUB para glyphStore markGlyphs] : begin
 	buildGsubThousands gsub para glyphStore
 
 	# cv##, ss##
+	if para.enableCvSs : begin
 		buildCVSS gsub para glyphStore
 
 	# locl

params/parameters.toml

@@ -57,6 +57,9 @@ powerlineShiftX = 0 # Horizontal shift
 # Whether to generate CV-SS features
 enableCvSs = true
 
+# Whether to generate NWID/WWID features
+enableNwidWwid = true
+
 # Whether to generate ligation
 enableLigation = true
 
@@ -108,12 +111,14 @@ spacing = 0
 # "FontFonfig Monospace"
 [spacing-fontconfig-mono]
 spacing = 0
+enableNwidWwid = false
 forceMonospace = true
 
 # Fixed variant
 [spacing-fixed]
 spacing = 0
 enableLigation = false
+enableNwidWwid = false
 forceMonospace = true
 
 # Quasi-proportional