recursive-copy

!Stability

> Simple, flexible file copy utility

Features

- Recursively copy whole directory hierarchies
- Choose which files are copied by passing a filter function, regular expression or glob
- Rename files dynamically, including changing the output path
- Transform file contents using streams
- Choose whether to overwrite existing files
- Choose whether to copy system files
- Filters out junk files by default
- Uses graceful-fs and mkdirp to avoid filesystem errors
- Emits start, finish and error events for each file that is processed
- Optional promise-based interface

Examples

#### Node-style callback interface

``javascript
var copy = require('recursive-copy');

copy('src', 'dest', function(error, results) {
if (error) {
console.error('Copy failed: ' + error);
} else {
console.info('Copied ' + results.length + ' files');
}
});
`

#### Promise interface

`javascript
var copy = require('recursive-copy');

copy('src', 'dest')
.then(function(results) {
console.info('Copied ' + results.length + ' files');
})
.catch(function(error) {
console.error('Copy failed: ' + error);
});
`

#### ES2015+ usage

`javascript
import copy from 'recursive-copy';

try {
const results = await copy('src', 'dest');
console.info('Copied ' + results.length + ' files');
} catch (error) {
console.error('Copy failed: ' + error);
}
`

#### Advanced options

`javascript
var copy = require('recursive-copy');

var path = require('path');
var through = require('through2');

var options = {
overwrite: true,
expand: true,
dot: true,
junk: true,
filter: [
'*/',
'!.htpasswd'
],
rename: function(filePath) {
return filePath + '.orig';
},
transform: function(src, dest, stats) {
if (path.extname(src) !== '.txt') { return null; }
return through(function(chunk, enc, done) {
var output = chunk.toString().toUpperCase();
done(null, output);
});
}
};

copy('src', 'dest', options)
.on(copy.events.COPY_FILE_START, function(copyOperation) {
console.info('Copying file ' + copyOperation.src + '...');
})
.on(copy.events.COPY_FILE_COMPLETE, function(copyOperation) {
console.info('Copied to ' + copyOperation.dest);
})
.on(copy.events.ERROR, function(error, copyOperation) {
console.error('Unable to copy ' + copyOperation.dest);
})
.then(function(results) {
console.info(results.length + ' file(s) copied');
})
.catch(function(error) {
return console.error('Copy failed: ' + error);
});
`




Usage

$3

Recursively copy files and folders from src to dest

#### Arguments:

| Name | Type | Required | Default | Description |
| ---- | ---- | -------- | ------- | ----------- |
| src | string | Yes | N/A | Source file/folder path |
| dest | string | Yes | N/A | Destination file/folder path |
| options.overwrite | boolean | No | false | Whether to overwrite destination files |
| options.expand | boolean | No | false | Whether to expand symbolic links |
| options.dot | boolean | No | false | Whether to copy files beginning with a . |
| options.junk | boolean | No | false | Whether to copy OS junk files (e.g. .DS_Store, Thumbs.db) |
| options.filter | function, RegExp, string, array | No | null | Filter function / regular expression / glob that determines which files to copy (uses maximatch) |
| options.rename | function | No | null | Function that maps source paths to destination paths |
| options.transform | function | No | null | Function that returns a transform stream used to modify file contents |
| options.results | boolean | No | true | Whether to return an array of copy results |
| options.concurrency | number | No | 255 | Maximum number of simultaneous copy operations |
| options.debug | boolean | No | false | Whether to log debug information |
| callback | function | No | null | Callback, invoked on success/failure |


#### Returns:

Promise Promise, fulfilled with array of copy results:

`json
[
{
"src": "/path/to/src",
"dest": "/path/to/dest",
"stats":
},
{
"src": "/path/to/src/file.txt",
"dest": "/path/to/dest/file.txt",
"stats":
},
{
"src": "/path/to/src/subfolder",
"dest": "/path/to/dest/subfolder",
"stats":
},
{
"src": "/path/to/src/subfolder/nested.txt",
"dest": "/path/to/dest/subfolder/nested.txt",
"stats":
}
]
`

Events

The value returned by the copy function implements the EventEmitter interface, and emits the following events:

| Event | Handler signature |
| ----- | ----------------- |
| copy.events.ERROR | function(error, ErrorInfo) |
| copy.events.COMPLETE | function(Array) |
| copy.events.CREATE_DIRECTORY_START | function(CopyOperation) |
| copy.events.CREATE_DIRECTORY_ERROR | function(error, CopyOperation) |
| copy.events.CREATE_DIRECTORY_COMPLETE | function(CopyOperation) |
| copy.events.CREATE_SYMLINK_START | function(CopyOperation) |
| copy.events.CREATE_SYMLINK_ERROR | function(error, CopyOperation) |
| copy.events.CREATE_SYMLINK_COMPLETE | function(CopyOperation) |
| copy.events.COPY_FILE_START | function(CopyOperation) |
| copy.events.COPY_FILE_ERROR | function(error, CopyOperation) |
| copy.events.COPY_FILE_COMPLETE | function(CopyOperation) |

...where the types referred to in the handler signature are as follows:

$3

| Property | Type | Description |
| -------- | ---- | ----------- |
| src | string | Source path of the file/folder/symlink that failed to copy |
| dest | string | Destination path of the file/folder/symlink that failed to copy |

$3

| Property | Type | Description |
| -------- | ---- | ----------- |
| src | string | Source path of the relevant file/folder/symlink |
| dest | string | Destination path of the relevant file/folder/symlink |
| stats | fs.Stats` | Stats for the relevant file/folder/symlink |