“扩展”选项在咕哝-贡献-复制中起什么作用？所有的例子都使用它，但是文档没有说明它的作用

  1. 下面是 README 和示例: https://github.com/gruntjs/grunt-contrib-copy/blob/master/README.md。
  2. 下面是来自 https://github.com/gruntjs/grunt-contrib-copy/blob/master/tasks/copy.js的代码的相关部分(我显然不能理解) :
module.exports = function(grunt) {
'use strict';


var path = require('path');


grunt.registerMultiTask('copy', 'Copy files.', function() {
var kindOf = grunt.util.kindOf;


var options = this.options({
processContent: false,
processContentExclude: []
});


var copyOptions = {
process: options.processContent,
noProcess: options.processContentExclude
};


grunt.verbose.writeflags(options, 'Options');


var dest;
var isExpandedPair;
var tally = {
dirs: 0,
files: 0
};


this.files.forEach(function(filePair) {
isExpandedPair = filePair.orig.expand || false;


filePair.src.forEach(function(src) {
if (detectDestType(filePair.dest) === 'directory') {
dest = (isExpandedPair) ? filePair.dest : unixifyPath(path.join(filePair.dest, src));
} else {
dest = filePair.dest;
}


if (grunt.file.isDir(src)) {
grunt.verbose.writeln('Creating ' + dest.cyan);
grunt.file.mkdir(dest);
tally.dirs++;
} else {
grunt.verbose.writeln('Copying ' + src.cyan + ' -> ' + dest.cyan);
grunt.file.copy(src, dest, copyOptions);
tally.files++;
}
});
});
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最佳答案

Expand lets you specify whether you want to create the destination path in full (e.g: /path/missing1/missing2), or only create the last directory when its parent exists (/path/existing/missing).

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Since expand is a part of Grunt, and not specific for grunt-contrib-copy, information about it can be found in Grunt's file configuration API:

Set expand to true to enable the following options:

  • cwd All src matches are relative to (but don't include) this path.
  • src Pattern(s) to match, relative to the cwd.
  • dest Destination path prefix.
  • ext Replace any existing extension with this value in generated dest paths.
  • extDot Used to indicate where the period indicating the extension is located. Can take either 'first' (extension begins after the first period in the file name) or 'last' (extension begins after the last period), and is set by default to 'first'.
  • flatten Remove all path parts from generated dest paths.
  • rename This function is called for each matched src file, (after extension renaming and flattening). The dest and matched src path are passed in, and this function must return a new dest value. If the same dest is returned more than once, each src which used it will be added to an array of sources for it.

Additionally it seems like dest will always be considered to be a destination directory if setting expand to true.


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