Fixes #30094: The less extension should contribute problem matchers for common less and sass compilers

extensions/less/package.json

@@ -18,6 +18,21 @@
 			"language": "less",
 			"scopeName": "source.css.less",
 			"path": "./syntaxes/less.tmLanguage.json"
-		}]
+		}],
+		"problemMatchers": [
+			{
+				"name": "lessc",
+				"label": "Lessc compiler",
+				"owner": "lessc",
+				"fileLocation": "absolute",
+				"pattern": {
+					"regexp": "(.*)\\sin\\s(.*)\\son line\\s(\\d+),\\scolumn\\s(\\d+)",
+					"message": 1,
+					"file": 2,
+					"line": 3,
+					"column": 4
+				}
+			}
+		]
 	}
 }

extensions/scss/package.json

@@ -18,6 +18,44 @@
 			"language": "scss",
 			"scopeName": "source.css.scss",
 			"path": "./syntaxes/scss.json"
-		}]
+		}],
+		"problemMatchers": [
+			{
+				"name": "node-sass",
+				"label": "Node Sass Compiler",
+				"owner": "node-sass",
+				"fileLocation": "absolute",
+				"pattern": [
+					{
+						"regexp": "^{$"
+					},
+					{
+						"regexp": "\\s*\"status\":\\s\\d+,"
+					},
+					{
+						"regexp": "\\s*\"file\":\\s\"(.*)\",",
+						"file": 1
+					},
+					{
+						"regexp": "\\s*\"line\":\\s(\\d+),",
+						"line": 1
+					},
+					{
+						"regexp": "\\s*\"column\":\\s(\\d+),",
+						"column": 1
+					},
+					{
+						"regexp": "\\s*\"message\":\\s\"(.*)\",",
+						"message": 1
+					},
+					{
+						"regexp": "\\s*\"formatted\":\\s(.*)"
+					},
+					{
+						"regexp": "^}$"
+					}
+				]
+			}
+		]
 	}
 }

src/vs/platform/markers/common/problemMatcher.ts

@@ -116,6 +116,7 @@ export interface ProblemMatcher {
 export interface NamedProblemMatcher extends ProblemMatcher {
 	name: string;
 	label: string;
+	deprecated?: boolean;
 }
 
 export interface NamedMultiLineProblemPattern {
@@ -1586,6 +1587,7 @@ class ProblemMatcherRegistryImpl implements IProblemMatcherRegistry {
 		this.add({
 			name: 'lessCompile',
 			label: localize('lessCompile', 'Less problems'),
+			deprecated: true,
 			owner: 'lessCompile',
 			applyTo: ApplyToKind.allDocuments,
 			fileLocation: FileLocationKind.Absolute,

src/vs/workbench/parts/tasks/electron-browser/task.contribution.ts

@@ -947,6 +947,9 @@ class TaskService extends EventEmitter implements ITaskService {
 		let entries: ProblemMatcherPickEntry[] = [];
 		for (let key of ProblemMatcherRegistry.keys()) {
 			let matcher = ProblemMatcherRegistry.get(key);
+			if (matcher.deprecated) {
+				continue;
+			}
 			if (matcher.name === matcher.label) {
 				entries.push({ label: matcher.name, matcher: matcher });
 			} else {