non zero exit in case of fails or errors

src/main.ts

@@ -71,13 +71,18 @@ export async function main({
     outputLogger,
   });
 
-  await lintProjects({
+  const isAllPassed = await lintProjects({
     projectReferences,
     template,
     workingDirectoryPath,
     cachedRepositoriesDirectoryPath,
     outputLogger,
   });
+
+  if (!isAllPassed) {
+    // eslint-disable-next-line require-atomic-updates
+    process.exitCode = 1;
+  }
 }
 
 /**
@@ -226,18 +231,22 @@ async function lintProjects({
     projectLintResultPromiseOutcomes.filter(isPromiseRejectedResult);
 
   outputLogger.logToStdout('');
+  let isAllPassed = true;
   fulfilledProjectLintResultPromiseOutcomes
     .sort((a, b) => {
       return a.value.projectName.localeCompare(b.value.projectName);
     })
     .forEach((fulfilledProjectLintResultPromiseOutcome, index) => {
-      reportProjectLintResult({
+      const { numberOfFailing } = reportProjectLintResult({
         projectLintResult: fulfilledProjectLintResultPromiseOutcome.value,
         outputLogger,
       });
       if (index < fulfilledProjectLintResultPromiseOutcomes.length - 1) {
         outputLogger.logToStdout('\n');
       }
+      if (numberOfFailing > 0) {
+        isAllPassed = false;
+      }
     });
   outputLogger.logToStdout('');
 
@@ -246,4 +255,6 @@ async function lintProjects({
       outputLogger.logToStderr(rejectedProjectLintResultPromiseOutcome.reason);
     },
   );
+
+  return isAllPassed && rejectedProjectLintResultPromiseOutcomes.length === 0;
 }

src/report-project-lint-result.ts

@@ -15,6 +15,7 @@ const log = createModuleLogger(projectLogger, 'fetch-or-populate-file-cache');
  * @param args - The arguments to this function.
  * @param args.projectLintResult - The data collected from the lint execution.
  * @param args.outputLogger - Writable streams for output messages.
+ * @returns Total number of passing and failing result.
  */
 export function reportProjectLintResult({
   projectLintResult,
@@ -62,6 +63,8 @@ export function reportProjectLintResult({
     chalk.bold('Elapsed time:'),
     projectLintResult.elapsedTimeIncludingLinting,
   );
+
+  return { numberOfPassing, numberOfFailing };
 }
 
 /**