最简单的copy
发布于 10 年前 作者 i5ting 4750 次浏览 最后一次编辑是 8 年前 来自 分享 
	var gulp = require("gulp")
	 gulp.src(source_path).pipe(gulp.dest(desc_path));

或

	require("gulp").src(source_path).pipe(gulp.dest(desc_path));

代码说明

  • source_path是从哪里拷贝，可以是数组
  • desc_path 是拷贝到哪里，只能是字符串

说明

gulp是基于stream的，所以性能非常好，而且可以检测copy进度哦

4 回复

如果單純只是需要「copy」不需要用到 gulp 的喔：

fs.createReadStream(source_path).pipe(fs.createWriteStream(dest_path))

@chinghanho 被拆穿了，哈哈

我有1点不确定，createReadStream可以传数组么？

@i5ting

node.js 內建的 fs.createReadStream 這組不行。

@chinghanho

gulp

var vfs = require('vinyl-fs');

Gulp.prototype.src = vfs.src;

vinyl-fs

function src(glob, opt) {
  var options = assign({
    read: true,
    buffer: true
  }, opt);
  var pass = through.obj();

  if (!isValidGlob(glob)) {
    throw new Error('Invalid glob argument: ' + glob);
  }
  // return dead stream if empty array
  if (Array.isArray(glob) && glob.length === 0) {
    process.nextTick(pass.end.bind(pass));
    return pass;
  }

  var globStream = gs.create(glob, options);

  // when people write to use just pass it through
  var outputStream = globStream
    .pipe(through.obj(createFile))
    .pipe(getStats(options));

  if (options.since) {
    outputStream = outputStream
      .pipe(filterSince(options.since));
  }

  if (options.read !== false) {
    outputStream = outputStream
      .pipe(getContents(options));
  }

  return outputStream.pipe(pass);
}

var gs = require('glob-stream');

glob-stream

see

https://github.com/wearefractal/glob-stream

Glob

var stream = gs.create(['./**/*.js', '!./node_modules/**/*']);
Globs are executed in order, so negations should follow positive globs. For example:

index.js

  // creates a stream for multiple globs or filters
  create: function(globs, opt) {
    if (!opt) opt = {};
    if (typeof opt.cwd !== 'string') opt.cwd = process.cwd();
    if (typeof opt.dot !== 'boolean') opt.dot = false;
    if (typeof opt.silent !== 'boolean') opt.silent = true;
    if (typeof opt.nonull !== 'boolean') opt.nonull = false;
    if (typeof opt.cwdbase !== 'boolean') opt.cwdbase = false;
    if (opt.cwdbase) opt.base = opt.cwd;

    // only one glob no need to aggregate
    if (!Array.isArray(globs)) globs = [globs];

    var positives = [];
    var negatives = [];

    globs.forEach(function(glob, index) {
      if (typeof glob !== 'string' && !(glob instanceof RegExp)) {
        throw new Error('Invalid glob at index ' + index);
      }

      var globArray = isNegative(glob) ? negatives : positives;

      // create Minimatch instances for negative glob patterns
      if (globArray === negatives && typeof glob === 'string') {
        glob = new Minimatch(unrelative(opt.cwd, glob), opt);
      }

      globArray.push({
        index: index,
        glob: glob
      });
    });

    if (positives.length === 0) throw new Error('Missing positive glob');

    // only one positive glob no need to aggregate
    if (positives.length === 1) return streamFromPositive(positives[0]);

    // create all individual streams
    var streams = positives.map(streamFromPositive);

    // then just pipe them to a single unique stream and return it
    var aggregate = new Combine(streams);
    var uniqueStream = unique('path');

    return aggregate.pipe(uniqueStream);

    function streamFromPositive(positive) {
      var negativeGlobs = negatives.filter(indexGreaterThan(positive.index)).map(toGlob);
      return gs.createStream(positive.glob, negativeGlobs, opt);
    }
  }
};

    // then just pipe them to a single unique stream and return it
    var aggregate = new Combine(streams);

and

var Combine = require('ordered-read-streams');

ordered-read-streams

https://github.com/armed/ordered-read-streams

Combines array of streams into one read stream in strict order

这才是根源

哈哈

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