fix(lint): add threshold summary to run failures

Co-Authored-By: Virgil <virgil@lethean.io>

cmd/core-lint/main.go

@@ -96,7 +96,17 @@ func newRunCommand(commandName string, summary string, defaults lintpkg.RunInput
 			return err
 		}
 		if !report.Summary.Passed {
-			return coreerr.E("cmd."+commandName, "lint failed", nil)
+			return coreerr.E(
+				"cmd."+commandName,
+				fmt.Sprintf(
+					"lint failed (fail-on=%s): %d error(s), %d warning(s), %d info finding(s)",
+					input.FailOn,
+					report.Summary.Errors,
+					report.Summary.Warnings,
+					report.Summary.Info,
+				),
+				nil,
+			)
 		}
 		return nil
 	})

cmd/core-lint/main_test.go

@@ -40,6 +40,7 @@ func Run() {
 
 	stdout, stderr, exitCode := runCLI(t, dir, "run", "--output", "json", "--fail-on", "warning", dir)
 	assert.Equal(t, 1, exitCode, stderr)
+	assert.Contains(t, stderr, "lint failed (fail-on=warning)")
 
 	var report lintpkg.Report
 	require.NoError(t, json.Unmarshal([]byte(stdout), &report))