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# 从命令行传递参数 ``` // npm install --save-dev gulp gulp-if gulp-uglify minimist var gulp = require('gulp'); var gulpif = require('gulp-if'); var uglify = require('gulp-uglify'); var minimist = require('minimist'); var knownOptions = { string: 'env', default: { env: process.env.NODE_ENV || 'production' } }; var options = minimist(process.argv.slice(2), knownOptions); gulp.task('scripts', function() { return gulp.src('**/*.js') .pipe(gulpif(options.env === 'production', uglify())) // 仅在生产环境时候进行压缩 .pipe(gulp.dest('dist')); }); ``` 然后,通过如下命令运行 gulp: ``` $ gulp scripts --env development ```