codegen: Remove built-in Kotlin support (#1935)

* codegen: Remove build-in Kotlin support

* Update language reference for docs

* Mark old field as reserved

Author: kyleconroy

docs/reference/language-support.rst

@@ -1,13 +1,13 @@
 Database and language support
 #############################
 
-========  ============  ============  ===============
-Language  MySQL         PostgreSQL    SQLite
-========  ============  ============  ===============
-Go        Stable        Stable        Beta
-Kotlin    Beta          Beta          Not implemented
-Python    Beta          Beta          Not implemented
-========  ============  ============  ===============
+========  ================   ============  ============  ===============
+Language  Plugin             MySQL         PostgreSQL    SQLite
+========  =================  ============  ============  ===============
+Go        (built-in)         Stable        Stable        Beta
+Kotlin    sqlc-gen-kotlin    Beta          Beta          Not implemented
+Python    sqlc-gen-python    Beta          Beta          Not implemented
+========  =================  ============  ============  ===============
 
 Future Language Support
 ************************

internal/cmd/generate.go

@@ -13,7 +13,6 @@ import (
 
 	"github.com/kyleconroy/sqlc/internal/codegen/golang"
 	"github.com/kyleconroy/sqlc/internal/codegen/json"
-	"github.com/kyleconroy/sqlc/internal/codegen/kotlin"
 	"github.com/kyleconroy/sqlc/internal/codegen/python"
 	"github.com/kyleconroy/sqlc/internal/compiler"
 	"github.com/kyleconroy/sqlc/internal/config"
@@ -142,12 +141,6 @@ func Generate(ctx context.Context, e Env, dir, filename string, stderr io.Writer
 				Gen: config.SQLGen{Go: sql.Gen.Go},
 			})
 		}
-		if sql.Gen.Kotlin != nil {
-			pairs = append(pairs, outPair{
-				SQL: sql,
-				Gen: config.SQLGen{Kotlin: sql.Gen.Kotlin},
-			})
-		}
 		if sql.Gen.Python != nil {
 			pairs = append(pairs, outPair{
 				SQL: sql,
@@ -197,10 +190,6 @@ func Generate(ctx context.Context, e Env, dir, filename string, stderr io.Writer
 			name = combo.Go.Package
 			lang = "golang"
 
-		case sql.Gen.Kotlin != nil:
-			lang = "kotlin"
-			name = combo.Kotlin.Package
-
 		case sql.Gen.Python != nil:
 			lang = "python"
 			name = combo.Python.Package
@@ -301,10 +290,6 @@ func codegen(ctx context.Context, combo config.CombinedSettings, sql outPair, re
 		out = combo.Go.Out
 		handler = ext.HandleFunc(golang.Generate)
 
-	case sql.Gen.Kotlin != nil:
-		out = combo.Kotlin.Out
-		handler = ext.HandleFunc(kotlin.Generate)
-
 	case sql.Gen.Python != nil:
 		out = combo.Python.Out
 		handler = ext.HandleFunc(python.Generate)

internal/cmd/shim.go

@@ -59,7 +59,6 @@ func pluginSettings(cs config.CombinedSettings) *plugin.Settings {
 		Rename:    cs.Rename,
 		Codegen:   pluginCodegen(cs.Codegen),
 		Python:    pluginPythonCode(cs.Python),
-		Kotlin:    pluginKotlinCode(cs.Kotlin),
 		Go:        pluginGoCode(cs.Go),
 		Json:      pluginJSONCode(cs.JSON),
 	}
@@ -137,15 +136,6 @@ func pluginPythonType(pt config.PythonType) *plugin.PythonType {
 	}
 }
 
-func pluginKotlinCode(s config.SQLKotlin) *plugin.KotlinCode {
-	return &plugin.KotlinCode{
-		Out:                         s.Out,
-		Package:                     s.Package,
-		EmitExactTableNames:         s.EmitExactTableNames,
-		InflectionExcludeTableNames: s.InflectionExcludeTableNames,
-	}
-}
-
 func pluginJSONCode(s config.SQLJSON) *plugin.JSONCode {
 	return &plugin.JSONCode{
 		Out:      s.Out,