Merge pull request #650 from alixander/ignore-lexer-not-found

render code snippets: fallback lexer if none found

ci/release/changelogs/next.md

@@ -3,5 +3,6 @@
 #### Improvements 🧹
 
 - ELK layouts tuned to have better defaults. [#627](https://github.com/terrastruct/d2/pull/627)
+- Code snippets of unrecognized languages will render (just without syntax highlighting). [#650](https://github.com/terrastruct/d2/pull/650)
 
 #### Bugfixes ⛑️

d2renderers/d2svg/d2svg.go

@@ -807,7 +807,7 @@ func drawShape(writer io.Writer, targetShape d2target.Shape, sketchRunner *d2ske
 		if targetShape.Type == d2target.ShapeCode {
 			lexer := lexers.Get(targetShape.Language)
 			if lexer == nil {
-				return labelMask, fmt.Errorf("code snippet lexer for %s not found", targetShape.Language)
+				lexer = lexers.Fallback
 			}
 			style := styles.Get("github")
 			if style == nil {

e2etests/regression_test.go

@@ -302,6 +302,13 @@ k8s -> osvc: keycloak
 k8s -> osvc: heptapod
 k8s -> osvc: harbor
 k8s -> osvc: vault
+`,
+		},
+		{
+			name: "no-lexer",
+			script: `x: |d2
+  x -> y
+|
 `,
 		},
 	}

e2etests/testdata/regression/no-lexer/dagre/board.exp.json

@@ -0,0 +1,46 @@
+{
+  "name": "",
+  "fontFamily": "SourceSansPro",
+  "shapes": [
+    {
+      "id": "x",
+      "type": "code",
+      "pos": {
+        "x": 0,
+        "y": 0
+      },
+      "width": 73,
+      "height": 38,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "#FFFFFF",
+      "stroke": "#0A0F25",
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "x -> y",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "d2",
+      "color": "#0A0F25",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 73,
+      "labelHeight": 38,
+      "zIndex": 0,
+      "level": 1
+    }
+  ],
+  "connections": []
+}

e2etests/testdata/regression/no-lexer/elk/board.exp.json

@@ -0,0 +1,46 @@
+{
+  "name": "",
+  "fontFamily": "SourceSansPro",
+  "shapes": [
+    {
+      "id": "x",
+      "type": "code",
+      "pos": {
+        "x": 12,
+        "y": 12
+      },
+      "width": 73,
+      "height": 38,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "#FFFFFF",
+      "stroke": "#0A0F25",
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "x -> y",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "d2",
+      "color": "#0A0F25",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 73,
+      "labelHeight": 38,
+      "zIndex": 0,
+      "level": 1
+    }
+  ],
+  "connections": []
+}