eslint: reduce log-noise, cleanup error codes

Author: simschla

Diff for: lib/src/main/resources/com/diffplug/spotless/npm/common-serve.js

@@ -1,4 +1,5 @@
-// this file will be glued to the top of the specific xy-server.js file
+// this file will be glued to the top of the specific xy-serve.js file
+const debug_serve = false;
 const GracefulShutdownManager = require("@moebius/http-graceful-shutdown").GracefulShutdownManager;
 const express = require("express");
 const app = express();

Diff for: lib/src/main/resources/com/diffplug/spotless/npm/eslint-serve.js

@@ -9,14 +9,14 @@ app.post("/eslint/format", async (req, res) => {
 		const ESLintOverrideConfigFile = format_data.eslint_override_config_file;
 
 		if (!ESLintOverrideConfig && !ESLintOverrideConfigFile) {
-			res.status(501).send("Error while formatting: No config provided");
+			res.status(400).send("Error while formatting: No config provided");
 			return;
 		}
 
 		const filePath = format_data.file_path;
 
 		if (!filePath) {
-			res.status(501).send("Error while formatting: No file path provided");
+			res.status(400).send("Error while formatting: No file path provided");
 			return;
 		}
 
@@ -41,8 +41,10 @@ app.post("/eslint/format", async (req, res) => {
 			eval("ESLintOptions.overrideConfig = " + ESLintOverrideConfig);
 		}
 
-		console.log("using options: " + JSON.stringify(ESLintOptions));
-		console.log("format input: ", format_data.file_content);
+		if (debug_serve) {
+			console.log("using options: " + JSON.stringify(ESLintOptions));
+			console.log("format input: ", format_data.file_content);
+		}
 
 		const eslint = new ESLint(ESLintOptions);
 
@@ -55,20 +57,22 @@ app.post("/eslint/format", async (req, res) => {
 		// LintResult[] // https://eslint.org/docs/latest/developer-guide/nodejs-api#-lintresult-type
 		const results = await eslint.lintText(format_data.file_content, lintTextOptions);
 		if (results.length !== 1) {
-			res.status(501).send("Error while formatting: Unexpected number of results: " + JSON.stringify(results));
+			res.status(500).send("Error while formatting: Unexpected number of results: " + JSON.stringify(results));
 			return;
 		}
 		const result = results[0];
-		console.log("result: " + JSON.stringify(result));
+		if (debug_serve) {
+			console.log("result: " + JSON.stringify(result));
+		}
 		if (result.fatalErrorCount && result.fatalErrorCount > 0) {
-			res.status(501).send("Fatal error while formatting: " + JSON.stringify(result.messages));
+			res.status(500).send("Fatal error while formatting: " + JSON.stringify(result.messages));
 			return;
 		}
 		const formatted = result.output || result.source || format_data.file_content;
 		res.set("Content-Type", "text/plain");
 		res.send(formatted);
 	} catch (err) {
 		console.log("error", err);
-		res.status(501).send("Error while formatting: " + err);
+		res.status(500).send("Error while formatting: " + err);
 	}
 });

Diff for: lib/src/main/resources/com/diffplug/spotless/npm/prettier-serve.js

@@ -27,7 +27,7 @@ app.post("/prettier/format", (req, res) => {
 	try {
 		formatted_file_content = prettier.format(format_data.file_content, format_data.config_options);
 	} catch(err) {
-		res.status(501).send("Error while formatting: " + err);
+		res.status(500).send("Error while formatting: " + err);
 		return;
 	}
 	res.set("Content-Type", "text/plain");

Diff for: lib/src/main/resources/com/diffplug/spotless/npm/tsfmt-serve.js

@@ -25,6 +25,6 @@ app.post("/tsfmt/format", (req, res) => {
 		res.set("Content-Type", "text/plain");
 		res.send(resultMap.dest);
 	}).catch(reason => {
-		res.status(501).send(reason);
+		res.status(500).send(reason);
 	});
 });

Diff for: testlib/src/test/java/com/diffplug/spotless/npm/PrettierFormatterStepTest.java

@@ -116,7 +116,7 @@ void verifyPrettierErrorMessageIsRelayed() throws Exception {
 					new PrettierConfig(null, ImmutableMap.of("parser", "postcss")));
 			try (StepHarnessWithFile stepHarness = StepHarnessWithFile.forStep(this, formatterStep)) {
 				stepHarness.testResourceExceptionMsg("npm/prettier/filetypes/scss/scss.dirty").isEqualTo(
-						"Unexpected response status code at /prettier/format [HTTP 501] -- (Error while formatting: Error: Couldn't resolve parser \"postcss\")");
+						"Unexpected response status code at /prettier/format [HTTP 500] -- (Error while formatting: Error: Couldn't resolve parser \"postcss\")");
 			}
 		}
 	}