cpy

> Copy files

IMPORTANT: This package has a lot of problems and I unfortunately don't have time to fix them. I would recommend against using this package until these problems are resolved. Help welcome (see the issue tracker) 🙏

Why

- Fast by cloning the files whenever possible.
- Resilient by using graceful-fs.
- User-friendly by accepting globs and creating non-existent destination directories.
- User-friendly error messages.
- Progress reporting.

Install

``sh
npm install cpy
`

Usage

`js
import cpy from 'cpy';

await cpy([
'source/*.png', // Copy all .png files
'!source/goat.png', // Ignore goat.png
], 'destination');

// Copy node_modules to destination/node_modules
await cpy('node_modules', 'destination');

// Copy node_modules content to destination
await cpy('node_modules/**', 'destination');

// Copy node_modules structure but skip all files except .json files
await cpy('node_modules/*/.json', 'destination');

// Copy all png files into destination without keeping directory structure
await cpy('*/.png', 'destination', {flat: true});

// Progress reporting
await cpy('source/**', 'destination', {
onProgress: progress => {
console.log(Progress: ${Math.round(progress.percent * 100)}%);
}
});

console.log('Files copied!');
`

API

$3

Returns a Promise with the destination file paths.

#### source

Type: string | string[]

Files to copy.

If any of the files do not exist, an error will be thrown (does not apply to globs).

#### destination

Type: string

Destination directory.

#### options

Type: object

Options are passed to globby.

Note: Dotfiles are excluded by default. Set dot: true to include them.

In addition, you can specify the below options.

##### cwd

Type: string\
Default: process.cwd()

Working directory to find source files.

##### overwrite

Type: boolean\
Default: true

Overwrite existing files.

##### ignoreExisting

Type: boolean\
Default: false

Skip files when the destination path already exists.

This option takes precedence over overwrite.

##### update

Type: boolean\
Default: false

Only overwrite when the source is newer, or when sizes differ with the same modification time. Ignored when overwrite is false or ignoreExisting is true.

##### flat

Type: boolean\
Default: false

Flatten directory structure. All copied files will be put in the same directory.

`js
import cpy from 'cpy';

await cpy('src/*/.js', 'destination', {
flat: true
});
`

##### base

Type: 'cwd' | 'pattern'\
Default: undefined

Choose how destination paths are calculated for patterns. By default, globs are resolved relative to their parent and explicit paths are resolved relative to cwd. Set to 'pattern' to make explicit paths behave like globs, or 'cwd' to make globs behave like explicit paths.

##### rename

Type: string | Function

Filename or function used to rename every file in source. Use a two-argument function to receive a frozen source file object and a mutable destination file object. The destination path must stay within the original destination directory. The legacy single-argument form is deprecated, emits a warning, and will be removed in the next major release.

`js
import cpy from 'cpy';

await cpy('foo.js', 'destination', {
rename: (source, destination) => {
if (source.nameWithoutExtension === 'foo') {
destination.nameWithoutExtension = 'bar';
}
}
});

await cpy('foo.js', 'destination', {
rename: (source, destination) => {
if (source.nameWithoutExtension === 'foo') {
destination.extension = 'ts';
}

console.log(destination.name);
//=> 'foo.ts'
}
});

await cpy('foo.js', 'destination', {
rename: 'new-name'
});
`

##### concurrency

Type: number\
Default: os.availableParallelism()

Number of files being copied concurrently.

##### ignoreJunk

Type: boolean\
Default: true

Ignores junk files.

##### filter

Type: Function

Function to filter files to copy.

Receives a source file object and a context object with the resolved destination path.

Return true to include, false to exclude. You can also return a Promise that resolves to true or false.

`js
import cpy from 'cpy';

await cpy('foo', 'destination', {
filter: (file, {destinationPath}) => file.extension !== 'nocopy'
});
`

##### onProgress

Type: Function

The given function is called whenever there is measurable progress.

`js
import cpy from 'cpy';

await cpy('foo', 'destination', {
onProgress: progress => {
// …
}
});
`

##### signal

Type: AbortSignal

Abort signal to cancel the copy operation.

##### followSymbolicLinks

Type: boolean\
Default: true

Whether to follow symbolic links.

##### preserveTimestamps

Type: boolean\
Default: false

Preserve file access and modification timestamps when copying.

##### dryRun

Type: boolean\
Default: false

Skip copying and return the resolved destination paths.

##### Source file object

###### path

Type: string\
Example: '/tmp/dir/foo.js'

Resolved path to the file.

###### relativePath

Type: string\
Example: 'dir/foo.js' if cwd was '/tmp'

Relative path to the file from cwd.

###### name

Type: string\
Example: 'foo.js'

Filename with extension.

###### nameWithoutExtension

Type: string\
Example: 'foo'

Filename without extension.

###### extension

Type: string\
Example: 'js'

File extension.

##### Destination file object

###### path

Type: string\
Example: '/tmp/dir/foo.js'

Resolved destination path for the file. The directory part must stay within the original destination directory.

###### name

Type: string\
Example: 'foo.js'

Filename with extension.

###### nameWithoutExtension

Type: string\
Example: 'foo'

Filename without extension.

###### extension

Type: string\
Example: 'js'

File extension.

Progress reporting

The onProgress option provides progress information during file copying:

`js
import cpy from 'cpy';

await cpy(source, destination, {
onProgress: progress => {
console.log(Progress: ${Math.round(progress.percent * 100)}%);
}
});
`

$3

`js
{
completedFiles: number,
totalFiles: number,
completedSize: number,
percent: number,
sourcePath: string,
destinationPath: string,
}
`

- completedFiles - Number of files copied so far.
- totalFiles - Total number of files to copy.
- completedSize - Number of bytes copied so far.
- percent - Progress percentage as a value between 0 and 1.
- sourcePath - Absolute source path of the current file being copied.
- destinationPath - Absolute destination path of the current file being copied.

#### handler(progress)

Type: Function

Note that the .on() method is available only right after the initial cpy call, so make sure you add a handler before awaiting the promise:

`js
import cpy from 'cpy';

await cpy(source, destination).on('progress', progress => {
// …
});
``

Related

- cpy-cli - CLI for this module
- copy-file - Copy a single file
- move-file - Move a file
- make-dir - Make a directory and its parents if needed