gulp-notify 与 gulp-if 使用没有效果

gulp 代码:

gulp.task('js', function() {
        var condition;
        var jsDest = './public/javascript/dest';
        var stream = gulp.src(paths.js)
            .pipe(plumber({
                errorHandler: notify.onError('Message:\n\t<%= error.message %>\nDetails:\n\tlineNumber: <%= error.lineNumber %>')
            }))
            .pipe(jshint())
            .pipe(notify(function(file) {
                if ( file.jshint.success ) {
                    condition = true;
                    return false;
                }
                condition = false;
    
                var errors = file.jshint.results.map(function(data) {
                    if ( data.error ) {
                        return 'line ' + data.error.line + ', col ' + data.error.character + ', ' + data.error.reason;
                    }
                }).join('\n');
                return file.relative + ' (' + file.jshint.results.length +  ' errors)\n' + errors;
            }))
            .pipe(uglify())
            .pipe(rename({
                extname: '.min.js'
            }))
            .pipe(gulp.dest(jsDest))
            .pipe(livereload())
            .pipe(gulpif(condition, notify('Js: done -> <%= file.relative %>!')));     //这句话证明是无效的，为什么呢？无法达到实际的效果。。。
    
        return stream;
    });

错误信息：

gujunmin@www:~/projects/forms-authentication$ gulp
[09:50:02] Using gulpfile ~/projects/forms-authentication/gulpfile.js
[09:50:02] Starting 'jade'...
[09:50:02] Starting 'css'...
[09:50:02] Starting 'js'...
Transformers.markdown is deprecated, you must replace the :markdown jade filter, with :marked and install jstransformer-marked before you update to jade@2.0.0.
[09:50:03] Finished 'jade' after 836 ms
[09:50:03] Finished 'js' after 824 ms
[09:50:03] Finished 'css' after 880 ms
[09:50:03] Starting 'default'...
[09:50:03] Finished 'default' after 84 ms
File /home/gujunmin/projects/forms-authentication/public/javascript/src/lm.js was changed, task runnning...
[09:50:16] Starting 'js'...
[09:50:16] gulp-notify: [Gulp notification] lm.js (1 errors)
line 10, col 22, Missing semicolon.
[09:50:16] /home/gujunmin/projects/forms-authentication/public/javascript/dest/lm.min.js reloaded.
[09:50:16] Finished 'js' after 317 ms

有错误的时候，才有显示错误。没有错误的时候什么都没有显示。

请各位指教，O(∩_∩)O谢谢