feat: Add Problem Matcher for dotnet-format

.github/dotnet-format.json

@@ -0,0 +1,19 @@
+{
+    "problemMatcher": [
+        {
+            "owner": "dotnet-format",
+            "pattern": [
+                {
+                    "regexp": "^\\s*(.*)\\((\\d+),(\\d+)\\):\\s+(error|warning)\\s+(.+):\\s+(.*)\\s+\\[(.+)\\]$",
+                    "file": 1,
+                    "line": 2,
+                    "column": 3,
+                    "severity": 4,
+                    "code": 5,
+                    "message": 6,
+                    "fromPath": 7
+                }
+            ]
+        }
+    ]
+}

__tests__/problem-matchers.json.test.ts

@@ -0,0 +1,70 @@
+import csc from '../.github/csc.json';
+import dotnetFormat from '../.github/dotnet-format.json';
+
+// Unit tests for problem matchers
+// https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md
+
+describe('/.github/csc.json tests', () => {
+  const problemMatcher = csc.problemMatcher[0].pattern[0];
+
+  it.each([
+    [
+      'Program.cs(10,79): error CS1002: ; expected [/Users/zacharyeisinger/Documents/repo/setup-dotnet/__tests__/sample-broken-csproj/sample.csproj]',
+      {
+        file: 'Program.cs',
+        line: '10',
+        severity: 'error',
+        code: 'CS1002',
+        message: '; expected',
+        fromPath:
+          '/Users/zacharyeisinger/Documents/repo/setup-dotnet/__tests__/sample-broken-csproj/sample.csproj'
+      }
+    ],
+    [
+      "S:\\Msbuild\\src\\Build\\Evaluation\\ExpressionShredder.cs(33,7): error CS1003: Syntax error, ',' expected [S:\\msbuild\\src\\Build\\Microsoft.Build.csproj > Properties:prop]",
+      {
+        file: 'S:\\Msbuild\\src\\Build\\Evaluation\\ExpressionShredder.cs',
+        line: '33',
+        severity: 'error',
+        code: 'CS1003',
+        message: "Syntax error, ',' expected",
+        fromPath:
+          'S:\\msbuild\\src\\Build\\Microsoft.Build.csproj > Properties:prop'
+      }
+    ]
+  ])('log "%s" matches %o', (logOutput, expected) => {
+    const regexp = new RegExp(problemMatcher.regexp);
+    const res = logOutput.match(regexp);
+
+    for (const key in expected) {
+      expect(res?.[problemMatcher[key]]).toBe(expected[key]);
+    }
+  });
+});
+
+describe('/.github/dotnet-format.json tests', () => {
+  const problemMatcher = dotnetFormat.problemMatcher[0].pattern[0];
+
+  it.each([
+    [
+      "/home/runner/work/repo/Test.cs(18,6): error WHITESPACE: Fix whitespace formatting. Replace 12 characters with '\\n\\s\\s\\s\\s\\s\\s\\s\\s'. [/home/runner/work/repo/Test.csproj]",
+      {
+        file: '/home/runner/work/repo/Test.cs',
+        line: '18',
+        column: '6',
+        severity: 'error',
+        code: 'WHITESPACE',
+        message:
+          "Fix whitespace formatting. Replace 12 characters with '\\n\\s\\s\\s\\s\\s\\s\\s\\s'.",
+        fromPath: '/home/runner/work/repo/Test.csproj'
+      }
+    ]
+  ])('log "%s" matches %o', (logOutput, expected) => {
+    const regexp = new RegExp(problemMatcher.regexp);
+    const res = logOutput.match(regexp);
+
+    for (const key in expected) {
+      expect(res?.[problemMatcher[key]]).toBe(expected[key]);
+    }
+  });
+});

__tests__/setup-dotnet.test.ts

@@ -77,6 +77,12 @@ describe('setup-dotnet tests', () => {
       expect(debugSpy).toHaveBeenCalledWith(expectedDebugMessage);
       expect(existsSyncSpy).toHaveBeenCalled();
       expect(infoSpy).toHaveBeenCalledWith(expectedInfoMessage);
+      expect(infoSpy).toHaveBeenCalledWith(
+        expect.stringMatching(/^##\[add-matcher\](.+)csc\.json$/)
+      );
+      expect(infoSpy).toHaveBeenCalledWith(
+        expect.stringMatching(/^##\[add-matcher\](.+)dotnet-format\.json$/)
+      );
     });
 
     it('should fail the action if quality is supplied but its value is not supported', async () => {

dist/setup/index.js

@@ -94047,6 +94047,11 @@ const qualityOptions = [
     'preview',
     'ga'
 ];
+/**
+ * The problem matcher files to be registered with the runner.
+ * https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md
+ */
+const problemMatchers = ['csc.json', 'dotnet-format.json'];
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
@@ -94104,8 +94109,9 @@ function run() {
                 const cacheDependencyPath = core.getInput('cache-dependency-path');
                 yield (0, cache_restore_1.restoreCache)(cacheDependencyPath);
             }
-            const matchersPath = path_1.default.join(__dirname, '..', '..', '.github');
-            core.info(`##[add-matcher]${path_1.default.join(matchersPath, 'csc.json')}`);
+            for (const file of problemMatchers) {
+                core.info(`##[add-matcher]${path_1.default.join(__dirname, '..', '..', '.github', file)}`);
+            }
         }
         catch (error) {
             core.setFailed(error.message);

src/setup-dotnet.ts

@@ -19,6 +19,12 @@ const qualityOptions = [
 
 export type QualityOptions = (typeof qualityOptions)[number];
 
+/**
+ * The problem matcher files to be registered with the runner.
+ * https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md
+ */
+const problemMatchers = ['csc.json', 'dotnet-format.json'];
+
 export async function run() {
   try {
     //
@@ -89,8 +95,11 @@ export async function run() {
       await restoreCache(cacheDependencyPath);
     }
 
-    const matchersPath = path.join(__dirname, '..', '..', '.github');
-    core.info(`##[add-matcher]${path.join(matchersPath, 'csc.json')}`);
+    for (const file of problemMatchers) {
+      core.info(
+        `##[add-matcher]${path.join(__dirname, '..', '..', '.github', file)}`
+      );
+    }
   } catch (error) {
     core.setFailed(error.message);
   }