feat: Add deprecated warning for gulplog v1 messages (#266)

lib/shared/log/to-console.js

@@ -1,5 +1,7 @@
 'use strict';
 
+var messages = require('@gulpjs/messages');
+
 /* istanbul ignore next */
 function noop() {}
 
@@ -17,6 +19,9 @@ function toConsole(log, opts, translate) {
   // Default loglevel to info level (3).
   var loglevel = opts.logLevel || 3;
 
+  var deprecatedPrinted = false;
+  log.on('deprecated', onDeprecated);
+
   // -L: Logs error events.
   if (loglevel > 0) {
     log.on('error', onError);
@@ -37,12 +42,33 @@ function toConsole(log, opts, translate) {
   }
 
   return function () {
+    log.removeListener('deprecated', onDeprecated);
     log.removeListener('error', onError);
     log.removeListener('warn', onWarn);
     log.removeListener('info', onInfo);
     log.removeListener('debug', onDebug);
   };
 
+  function onDeprecated() {
+    if (!deprecatedPrinted) {
+      var msg = { tag: messages.GULPLOG_DEPRECATED };
+      // Get message and timestamp before printing anything to avoid
+      // logging a half message if there's an error in one of them
+      var message = translate.message(msg);
+      var timestamp = translate.timestamp(msg);
+
+      if (message) {
+        // Ensure timestamp is not written without a message
+        if (timestamp) {
+          process.stderr.write(timestamp + ' ');
+        }
+        console.error(message);
+      }
+
+      deprecatedPrinted = true;
+    }
+  }
+
   function onError(msg) {
     // Get message and timestamp before printing anything to avoid
     // logging a half message if there's an error in one of them

lib/shared/translate.js

@@ -103,6 +103,9 @@ function getDefaultMessage(data) {
     case messages.NPM_INSTALL_GULP: {
       return chalk.red('Try running: npm install gulp');
     }
+    case messages.GULPLOG_DEPRECATED: {
+      return chalk.yellow("gulplog v1 is deprecated. Please help your plugins update!");
+    }
     case messages.COMPLETION_TYPE_MISSING: {
       return 'Missing completion type';
     }

package.json

@@ -30,10 +30,10 @@
     "cover": "nyc mocha --async-only --timeout 5000 test/lib test"
   },
   "dependencies": {
-    "@gulpjs/messages": "^1.0.0",
+    "@gulpjs/messages": "^1.1.0",
     "chalk": "^4.1.2",
     "copy-props": "^4.0.0",
-    "gulplog": "^2.1.0",
+    "gulplog": "^2.2.0",
     "interpret": "^3.1.1",
     "liftoff": "^5.0.0",
     "mute-stdout": "^2.0.0",
@@ -47,6 +47,7 @@
     "@babel/core": "^7.20.2",
     "@babel/preset-env": "^7.20.2",
     "@babel/register": "^7.18.9",
+    "@gulpjs/gulplog-v1": "npm:gulplog@1.0.0",
     "eslint": "^7.32.0",
     "eslint-config-gulp": "^5.0.1",
     "expect": "^27.5.1",

test/config-message-function.js

@@ -472,4 +472,19 @@ describe('config: message function', function() {
       done();
     }
   });
+
+  it('can change GULPLOG_DEPRECATED with .gulp.*', function(done) {
+    var cwd = path.join(baseDir, 'GULPLOG_DEPRECATED');
+    var expected = 'GULPLOG V1 IS DEPRECATED\n';
+
+    var opts = { cwd: cwd };
+    exec(gulp(), opts, cb);
+
+    function cb(err, stdout, stderr) {
+      expect(err).toBeNull();
+      expect(stdout).toEqual('');
+      expect(stderr).toEqual(expected);
+      done();
+    }
+  });
 });

test/fixtures/config/theming/GULPLOG_DEPRECATED/.gulp.js

@@ -0,0 +1,14 @@
+var messages = require('@gulpjs/messages');
+
+module.exports = {
+  message: function (data) {
+    if (data.tag === messages.GULPLOG_DEPRECATED) {
+      return 'GULPLOG V1 IS DEPRECATED';
+    }
+
+    return false;
+  },
+  timestamp: function () {
+    return false;
+  }
+};

test/fixtures/config/theming/GULPLOG_DEPRECATED/gulpfile.js

@@ -0,0 +1,6 @@
+var gulplog = require('@gulpjs/gulplog-v1');
+
+exports.default = function(done) {
+  gulplog.error('Some error here');
+  done();
+}