From 9f9bb164ca79da15d8549f50835e1ca0e67b2e88 Mon Sep 17 00:00:00 2001
From: be5invis <belleve@typeof.net>
Date: Wed, 3 Feb 2021 00:01:45 -0800
Subject: [PATCH] Sync variants of lambda with y (#872).

---
 font-src/glyphs/letter/latin/lower-y.ptl | 37 ++++++++++++------------
 params/variants.toml                     | 36 +++++++++++++++++++++--
 2 files changed, 51 insertions(+), 22 deletions(-)

diff --git a/font-src/glyphs/letter/latin/lower-y.ptl b/font-src/glyphs/letter/latin/lower-y.ptl
index d6498b809..8a0f189ba 100644
--- a/font-src/glyphs/letter/latin/lower-y.ptl
+++ b/font-src/glyphs/letter/latin/lower-y.ptl
@@ -339,26 +339,25 @@ glyph-block Letter-Latin-Lower-Y : begin
 	turned 'turny' 0x28E 'y' Middle (XH / 2) [MarkSet.b]
 
 	define [LambdaBarOverlayShape] : FlatSlashShape [mix SB RightSB 0.45] [mix 0 CAP 0.8] (OverlayStroke / 2)
+	define LambdaConfig : object
+		straight                  { true false  SLAB-NONE   }
+		straightTurn              { true true   SLAB-NONE   }
+		curly                     { false false SLAB-NONE   }
+		curlyTurn                 { false true  SLAB-NONE   }
+		straightMotionSerifed     { true false  SLAB-MOTION }
+		straightTurnMotionSerifed { true true   SLAB-MOTION }
+		curlyMotionSerifed        { false false SLAB-MOTION }
+		curlyTurnMotionSerifed    { false true  SLAB-MOTION }
 
-	create-glyph 'grek/lambda.straight' : glyph-proc
-		include : MarkSet.b
-		include : [GenSmallYShape true  false SLAB-NONE].SmallLambdaShape CAP 0
-
-	create-glyph 'grek/lambda.curly' : glyph-proc
-		include : MarkSet.b
-		include : [GenSmallYShape false false SLAB-NONE].SmallLambdaShape CAP 0
-
-	create-glyph 'lambdaSlash.straight' : glyph-proc
-		include : MarkSet.b
-		include : union
-			refer-glyph 'grek/lambda.straight'
-			LambdaBarOverlayShape
-
-	create-glyph 'lambdaSlash.curly' : glyph-proc
-		include : MarkSet.b
-		include : union
-			refer-glyph 'grek/lambda.curly'
-			LambdaBarOverlayShape
+	foreach { suffix { fStraight fTurn slabType } } [Object.entries LambdaConfig] : do
+		create-glyph "grek/lambda.\(suffix)" : glyph-proc
+			include : MarkSet.b
+			include : [GenSmallYShape fStraight fTurn slabType].SmallLambdaShape CAP 0
+		create-glyph "lambdaSlash.\(suffix)" : glyph-proc
+			include : MarkSet.b
+			include : union
+				LambdaBarOverlayShape
+				[GenSmallYShape fStraight fTurn slabType].SmallLambdaShape CAP 0
 
 	select-variant 'grek/lambda' 0x3BB
 	select-variant 'lambdaSlash' 0x19B (follow -- 'grek/lambda')
diff --git a/params/variants.toml b/params/variants.toml
index 094c1ec1b..c497d7a42 100644
--- a/params/variants.toml
+++ b/params/variants.toml
@@ -2628,11 +2628,41 @@ rank = 1
 description = "More-straight Greek small Lambda (`λ`)"
 selector."grek/lambda" = "straight"
 
-[prime.lambda.variants.curly]
+[prime.lambda.variants.straight-turn]
 rank = 2
+description = "Greek small Lambda (`λ`) with straight upper and a tail turns leftward"
+selector."grek/lambda" = "straightTurn"
+
+[prime.lambda.variants.curly]
+rank = 3
 description = "More curly Greek small Lambda (`λ`), like Iosevka 2.x"
 selector."grek/lambda" = "curly"
 
+[prime.lambda.variants.curly-turn]
+rank = 4
+description = "More curly Greek small Lambda (`λ`), like Iosevka 2.x, with a tail turns leftward"
+selector."grek/lambda" = "curlyTurn"
+
+[prime.lambda.variants.straight-motion-serifed]
+rank = 5
+description = "Greek small Lambda (`λ`) that is fully straight, with motion serifs"
+selector."grek/lambda" = "straightMotionSerifed"
+
+[prime.lambda.variants.straight-turn-motion-serifed]
+rank = 6
+description = "Greek small Lambda (`λ`) with straight upper and a tail turns leftward, and motion serifs"
+selector."grek/lambda" = "straightTurnMotionSerifed"
+
+[prime.lambda.variants.curly-motion-serifed]
+rank = 7
+description = "More curly Greek small Lambda (`λ`), like Iosevka 2.x, with motion serifs"
+selector."grek/lambda" = "curlyMotionSerifed"
+
+[prime.lambda.variants.curly-turn-motion-serifed]
+rank = 8
+description = "More curly Greek small Lambda (`λ`), like Iosevka 2.x, with a tail turns leftward and motion serifs"
+selector."grek/lambda" = "curlyTurnMotionSerifed"
+
 
 
 [prime.cyrl-capital-u]
@@ -2652,12 +2682,12 @@ selector."cyrl/U" = "straightTurn"
 
 [prime.cyrl-capital-u.variants.curly]
 rank = 3
-description = "More curly cyrillic capital U (`У`), like Iosevka 2.x"
+description = "More curly Cyrillic capital U (`У`), like Iosevka 2.x"
 selector."cyrl/U" = "curly"
 
 [prime.cyrl-capital-u.variants.curly-turn]
 rank = 4
-description = "More curly cyrillic capital U (`У`), like Iosevka 2.x, with a tail turns leftward"
+description = "More curly Cyrillic capital U (`У`), like Iosevka 2.x, with a tail turns leftward"
 selector."cyrl/U" = "curlyTurn"
 
 [prime.cyrl-capital-u.variants.cursive]