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# `@11ty/recursive-copy`
A temporary fork of [`timkendrick/recursive-copy`](https://github.com/timkendrick/recursive-copy) to satisfy https://github.com/11ty/eleventy/issues/3299 as Eleventy slowly [moves to use Node native API `fs.cp`](https://github.com/11ty/eleventy/issues/3360).
- v4.x requires Node 18+
- v3.x requires Node 0.10+
- v2.x requires Node 0.10+
> 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](https://www.npmjs.com/package/junk) files by default
- 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('@11ty/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('@11ty/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 '@11ty/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('@11ty/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
### `copy(src, dest, [options], [callback])`
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](https://www.npmjs.com/package/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<Array>` Promise, fulfilled with array of copy results:
```json
[
{
"src": "/path/to/src",
"dest": "/path/to/dest",
"stats": <Stats>
},
{
"src": "/path/to/src/file.txt",
"dest": "/path/to/dest/file.txt",
"stats": <Stats>
},
{
"src": "/path/to/src/subfolder",
"dest": "/path/to/dest/subfolder",
"stats": <Stats>
},
{
"src": "/path/to/src/subfolder/nested.txt",
"dest": "/path/to/dest/subfolder/nested.txt",
"stats": <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<CopyOperation>)` |
| `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:
### `ErrorInfo`
| 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 |
### `CopyOperation`
| 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 |
|
