fix: Detect skipped & unsupported files [PoC]

src/linter/linter.ts

@@ -169,7 +169,7 @@ async function lint(
 	});
 
 	const res = await lintWorkspace(workspace, filePathsWorkspace, options, config, matchedPatterns);
-	checkUnmatchedPatterns(filePatterns, matchedPatterns);
+	await checkUnmatchedPatterns(filePatterns, matchedPatterns, options);
 
 	lintEnd();
 	return res;
@@ -360,7 +360,7 @@ export function resolveReader({
  * @param patterns Available patterns
  * @throws Error if an unmatched pattern is found
  */
-function checkUnmatchedPatterns(patterns: FilePattern[], patternsMatch: Set<string>) {
+async function checkUnmatchedPatterns(patterns: FilePattern[], patternsMatch: Set<string>, options: LinterOptions) {
 	const unmatchedPatterns = patterns.reduce((acc, pattern) => {
 		if (pattern.endsWith("/")) { // Match all files in a directory
 			pattern += "**/*";
@@ -372,6 +372,41 @@ function checkUnmatchedPatterns(patterns: FilePattern[], patternsMatch: Set<stri
 		return acc;
 	}, [] as FilePattern[]);
 
+	// Check if the Glob pattern is actually a file that exists, but the linter is not able to process.
+	if (unmatchedPatterns.length) {
+		const notProcessedFiles = new Set<string>();
+		const rootFileReader = createReader({
+			fsBasePath: options.rootDir,
+			virBasePath: "/",
+			excludes: [
+				"/node_modules/**/*",
+				"/.*",
+				"/.*/**/*",
+			],
+		});
+
+		const allFiles = await rootFileReader.byGlob("/**/*");
+		const filePaths = allFiles.map((file) => file.getPath().substring(1));
+		const patterns = buildPatterns(unmatchedPatterns);
+
+		for (const pattern of patterns) {
+			const matchedFilePaths = filePaths.filter((filePath) => pattern.match(filePath));
+			if (matchedFilePaths.length) {
+				matchedFilePaths.forEach((filePath) => notProcessedFiles.add(filePath));
+				unmatchedPatterns.splice(unmatchedPatterns.indexOf(pattern.pattern), 1);
+			}
+		}
+
+		if (notProcessedFiles.size) {
+			// TODO: For files we need to just print a warning, but the reporter is not available here
+			// eslint-disable-next-line no-console
+			console.log(
+				`Specified ${notProcessedFiles.size === 1 ? "file" : "files"} ` +
+				`'${[...notProcessedFiles].join("', '")}' ${notProcessedFiles.size === 1 ? "is" : "are"}` +
+				` not supporeted by the linter`);
+		}
+	}
+
 	if (unmatchedPatterns.length) {
 		throw new Error(`Specified file ${unmatchedPatterns.length === 1 ? "pattern" : "patterns"}` +
 			` '${unmatchedPatterns.join("', '")}' did not match any resource`);

test/lib/linter/linter.ts

@@ -123,6 +123,20 @@ test.serial("lint: com.ui5.troublesome.app with unmatched patterns", async (t) =
 	});
 });
 
+test.serial("lint: com.ui5.troublesome.app with unmatched files", async (t) => {
+	const projectPath = path.join(fixturesProjectsPath, "com.ui5.troublesome.app");
+
+	const {lintProject} = t.context;
+
+	const res = await lintProject({
+		filePatterns: ["webapp/i18n/*"],
+		rootDir: projectPath,
+	});
+
+	// TODO: when logging is implemented, check for log messages.
+	t.snapshot(preprocessLintResultsForSnapshot(res));
+});
+
 test.serial("lint: com.ui5.troublesome.app with files property in ui5lint.config", async (t) => {
 	const projectPath = path.join(fixturesProjectsPath, "com.ui5.troublesome.app");
 

test/lib/linter/snapshots/linter.ts.md

@@ -1388,6 +1388,12 @@ Generated by [AVA](https://avajs.dev).
       },
     ]
 
+## lint: com.ui5.troublesome.app with unmatched files
+
+> Snapshot 1
+
+    []
+
 ## lint: com.ui5.troublesome.app with files property in ui5lint.config
 
 > Snapshot 1