CLI: Don't use logger to print information

changelog_unreleased/cli/12477.md

@@ -0,0 +1,12 @@
+#### Ignore `loglevel` when printing information (#12477 by @fisker)
+
+<!-- prettier-ignore -->
+```bash
+# Prettier stable
+prettier --loglevel silent --find-config-path index.js
+# Nothing printed
+
+# Prettier main
+prettier --loglevel silent --help no-color
+# .prettierrc
+```

src/cli/file-info.js

@@ -3,6 +3,7 @@
 const stringify = require("fast-json-stable-stringify");
 // eslint-disable-next-line no-restricted-modules
 const prettier = require("../index.js");
+const { printToScreen } = require("./utils.js");
 
 async function logFileInfoOrDie(context) {
   const {
@@ -22,7 +23,7 @@ async function logFileInfoOrDie(context) {
     resolveConfig: config !== false,
   });
 
-  context.logger.log(prettier.format(stringify(fileInfo), { parser: "json" }));
+  printToScreen(prettier.format(stringify(fileInfo), { parser: "json" }));
 }
 
 module.exports = logFileInfoOrDie;

src/cli/find-config-path.js

@@ -4,12 +4,13 @@ const path = require("path");
 
 // eslint-disable-next-line no-restricted-modules
 const prettier = require("../index.js");
+const { printToScreen } = require("./utils.js");
 
 async function logResolvedConfigPathOrDie(context) {
   const file = context.argv.findConfigPath;
   const configFile = await prettier.resolveConfigFile(file);
   if (configFile) {
-    context.logger.log(path.relative(process.cwd(), configFile));
+    printToScreen(path.relative(process.cwd(), configFile));
   } else {
     throw new Error(`Can not find configure file for "${file}"`);
   }

src/cli/index.js

@@ -13,6 +13,7 @@ const logResolvedConfigPathOrDie = require("./find-config-path.js");
 const {
   utils: { isNonEmptyArray },
 } = require("./prettier-internal.js");
+const { printToScreen } = require("./utils.js");
 
 async function run(rawArguments) {
   // Create a default level logger, so we can log errors during `logLevel` parsing
@@ -69,12 +70,12 @@ async function main(rawArguments, logger) {
   }
 
   if (context.argv.version) {
-    logger.log(prettier.version);
+    printToScreen(prettier.version);
     return;
   }
 
   if (context.argv.help !== undefined) {
-    logger.log(
+    printToScreen(
       typeof context.argv.help === "string" && context.argv.help !== ""
         ? createDetailedUsage(context, context.argv.help)
         : createUsage(context)
@@ -83,7 +84,7 @@ async function main(rawArguments, logger) {
   }
 
   if (context.argv.supportInfo) {
-    logger.log(
+    printToScreen(
       prettier.format(stringify(prettier.getSupportInfo()), {
         parser: "json",
       })
@@ -104,8 +105,8 @@ async function main(rawArguments, logger) {
   } else if (hasFilePatterns) {
     await formatFiles(context);
   } else {
-    logger.log(createUsage(context));
     process.exitCode = 1;
+    printToScreen(createUsage(context));
   }
 }
 

src/cli/utils.js

@@ -0,0 +1,6 @@
+"use strict";
+
+// eslint-disable-next-line no-console
+const printToScreen = console.log.bind(console);
+
+module.exports = { printToScreen };

tests/integration/__tests__/loglevel.js

@@ -37,6 +37,85 @@ describe("Should use default level logger to log `--loglevel` error", () => {
   });
 });
 
+describe("loglevel should not effect information print", () => {
+  for (const { argv, runOptions, assertOptions } of [
+    {
+      argv: ["--version"],
+      assertOptions: {
+        stdout(value) {
+          expect(value).not.toBe("");
+        },
+      },
+    },
+    {
+      argv: ["--help"],
+      assertOptions: {
+        stdout(value) {
+          expect(value.includes("-v, --version")).toBe(true);
+        },
+      },
+    },
+    {
+      argv: ["--help", "write"],
+      assertOptions: {
+        stdout(value) {
+          expect(value.startsWith("-w, --write")).toBe(true);
+        },
+      },
+    },
+    {
+      argv: ["--support-info"],
+      assertOptions: {
+        stdout(value) {
+          expect(JSON.parse(value)).toBeDefined();
+        },
+      },
+    },
+    {
+      argv: ["--find-config-path", "any-file"],
+      assertOptions: {
+        stdout: ".prettierrc\n",
+      },
+    },
+    {
+      argv: ["--file-info", "any-js-file.js"],
+      assertOptions: {
+        stdout(value) {
+          expect(JSON.parse(value)).toEqual({
+            ignored: false,
+            inferredParser: "babel",
+          });
+        },
+      },
+    },
+    {
+      argv: [],
+      runOptions: { isTTY: true },
+      assertOptions: {
+        status: "non-zero",
+        stdout(value) {
+          expect(value.includes("-v, --version")).toBe(true);
+        },
+      },
+    },
+    {
+      argv: ["--parser", "babel"],
+      runOptions: { input: "foo" },
+      assertOptions: { stdout: "foo;\n" },
+    },
+  ]) {
+    runPrettier("cli/loglevel", ["--loglevel", "silent", ...argv], {
+      ...runOptions,
+      title: argv.join(" "),
+    }).test({
+      stderr: "",
+      status: 0,
+      write: [],
+      ...assertOptions,
+    });
+  }
+});
+
 async function runPrettierWithLogLevel(logLevel, patterns) {
   const result = await runPrettier("cli/loglevel", [
     "--loglevel",

tests/integration/run-prettier.js

@@ -178,7 +178,7 @@ function runPrettier(dir, args = [], options = {}) {
 
   function testResult(testOptions) {
     for (const name of ["status", "stdout", "stderr", "write"]) {
-      test(`(${name})`, async () => {
+      test(`${options.title || ""}(${name})`, async () => {
         const result = await runCli();
         const value =
           // \r is trimmed from jest snapshots by default;
@@ -192,6 +192,8 @@ function runPrettier(dir, args = [], options = {}) {
         if (name in testOptions) {
           if (name === "status" && testOptions[name] === "non-zero") {
             expect(value).not.toBe(0);
+          } else if (typeof testOptions[name] === "function") {
+            testOptions[name](value);
           } else {
             expect(value).toEqual(testOptions[name]);
           }