[![npm][npm]][npm-url] [![node][node]][node-url] [![tests][tests]][tests-url] [![cover][cover]][cover-url] [![discussion][discussion]][discussion-url] [![size][size]][size-url] # copy-webpack-plugin Copies individual files or entire directories, which already exist, to the build directory. ## Getting Started To begin, you'll need to install `copy-webpack-plugin`: ```console npm install copy-webpack-plugin --save-dev ``` or ```console yarn add -D copy-webpack-plugin ``` or ```console pnpm add -D copy-webpack-plugin ``` Then add the plugin to your `webpack` config. For example: **webpack.config.js** ```js const CopyPlugin = require("copy-webpack-plugin"); module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "source", to: "dest" }, { from: "other", to: "public" }, ], }), ], }; ``` > **Note** > > `copy-webpack-plugin` is not designed to copy files generated from the build process; rather, it is to copy files that already exist in the source tree, as part of the build process. > **Note** > > If you want `webpack-dev-server` to write files to the output directory during development, you can force it with the [`writeToDisk`](https://github.com/webpack/webpack-dev-middleware#writetodisk) option or the [`write-file-webpack-plugin`](https://github.com/gajus/write-file-webpack-plugin). > **Note** > > You can get the original source filename from [Asset Objects](https://webpack.js.org/api/stats/#asset-objects). ## Options - **[`patterns`](#patterns)** - **[`options`](#options-1)** The plugin's signature: **webpack.config.js** ```js const CopyPlugin = require("copy-webpack-plugin"); module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "source", to: "dest" }, "path/to/source", // absolute or relative, files/directories/globs - see below for examples ], options: { concurrency: 100, }, }), ], }; ``` ### `Patterns` - [`from`](#from) - [`to`](#to) - [`context`](#context) - [`globOptions`](#globoptions) - [`filter`](#filter) - [`toType`](#totype) - [`force`](#force) - [`priority`](#priority) - [`transform`](#transform) - [`transformAll`](#transformAll) - [`noErrorOnMissing`](#noerroronmissing) - [`info`](#info) #### `from` Type: ```ts type from = string; ``` Default: `undefined` Glob or path from where we copy files. Globs accept [fast-glob pattern-syntax](https://github.com/mrmlnc/fast-glob#pattern-syntax). Glob can only be a `string`. > **Warning** > > Don't use directly `\\` in `from` option if it is a `glob` (i.e `path\to\file.ext`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator. > On Windows, the forward slash and the backward slash are both separators. > Instead please use `/`. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ "relative/path/to/file.ext", "relative/path/to/dir", path.resolve(__dirname, "src", "file.ext"), path.resolve(__dirname, "src", "dir"), "**/*", { from: "**/*", }, // If absolute path is a `glob` we replace backslashes with forward slashes, because only forward slashes can be used in the `glob` path.posix.join( path.resolve(__dirname, "src").replace(/\\/g, "/"), "*.txt", ), ], }), ], }; ``` ##### `For windows` If you define `from` as absolute file path or absolute folder path on `Windows`, you can use windows path segment (`\\`) ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: path.resolve(__dirname, "file.txt"), }, ], }), ], }; ``` But you should always use forward-slashes in `glob` expressions See [fast-glob manual](https://github.com/mrmlnc/fast-glob#how-to-write-patterns-on-windows). ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { // If absolute path is a `glob` we replace backslashes with forward slashes, because only forward slashes can be used in the `glob` from: path.posix.join( path.resolve(__dirname, "fixtures").replace(/\\/g, "/"), "*.txt", ), }, ], }), ], }; ``` The `context` behaves differently depending on what the `from` is (`glob`, `file` or `dir`). More [`examples`](#examples) #### `to` Type: ```ts type to = | string | ((pathData: { context: string; absoluteFilename?: string }) => string); ``` Default: `compiler.options.output` ##### `string` Output path. > **Warning** > > Don't use directly `\\` in `to` (i.e `path\to\dest`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator. > On Windows, the forward slash and the backward slash are both separators. > Instead please use `/` or `path` methods. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "**/*", to: "relative/path/to/dest/", }, { from: "**/*", to: "/absolute/path/to/dest/", }, { from: "**/*", to: "[path][name].[contenthash][ext]", }, ], }), ], }; ``` ##### `function` Allows to modify the writing path. > **Warning** > > Don't return directly `\\` in `to` (i.e `path\to\newFile`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator. > On Windows, the forward slash and the backward slash are both separators. > Instead please use `/` or `path` methods. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to({ context, absoluteFilename }) { return "dest/newPath/[name][ext]"; }, }, ], }), ], }; ``` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to({ context, absoluteFilename }) { return Promise.resolve("dest/newPath/[name][ext]"); }, }, ], }), ], }; ``` #### `context` Type: ```ts type context = string; ``` Default: `options.context|compiler.options.context` A path to be (1) prepended to `from` and (2) removed from the start of the result path(s). > **Warning** > > Don't use directly `\\` in `context` (i.e `path\to\context`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator. > On Windows, the forward slash and the backward slash are both separators. > Instead please use `/` or `path` methods. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.txt", to: "dest/", context: "app/", }, ], }), ], }; ``` `context` can be an absolute path or a relative path. If it is a relative path, then it will be converted to an absolute path based on `compiler.options.context`. `context` should be explicitly set only when `from` contains a glob. Otherwise, `context` is automatically set, based on whether `from` is a file or a directory: If `from` is a file, then `context` is its directory. The result path will be the filename alone. If `from` is a directory, then `context` equals `from`. The result paths will be the paths of the directory's contents (including nested contents), relative to the directory. The use of `context` is illustrated by these [`examples`](#examples). #### `globOptions` Type: ```ts type globOptions = import("globby").Options; ``` Default: `undefined` Allows to configure the glob pattern matching library used by the plugin. [See the list of supported options][glob-options] To exclude files from the selection, you should use [globOptions.ignore option](https://github.com/mrmlnc/fast-glob#ignore) **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "public/**/*", globOptions: { dot: true, gitignore: true, ignore: ["**/file.*", "**/ignored-directory/**"], }, }, ], }), ], }; ``` #### `filter` Type: ```ts type filter = (filepath: string) => boolean; ``` Default: `undefined` > **Note** > > To ignore files by path please use the [`globOptions.ignore`](#globoptions) option. **webpack.config.js** ```js const fs = require("fs").promise; module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "public/**/*", filter: async (resourcePath) => { const data = await fs.promises.readFile(resourcePath); const content = data.toString(); if (content === "my-custom-content") { return false; } return true; }, }, ], }), ], }; ``` #### `toType` Type: ```ts type toType = "dir" | "file" | "template"; ``` Default: `undefined` Determinate what is `to` option - directory, file or template. Sometimes it is hard to say what is `to`, example `path/to/dir-with.ext`. If you want to copy files in directory you need use `dir` option. We try to automatically determine the `type` so you most likely do not need this option. | Name | Type | Default | Description | | :---------------------------: | :------: | :---------: | :--------------------------------------------------------------------------------------------------- | | **[`'dir'`](#dir)** | `string` | `undefined` | If `to` has no extension or ends on `'/'` | | **[`'file'`](#file)** | `string` | `undefined` | If `to` is not a directory and is not a template | | **[`'template'`](#template)** | `string` | `undefined` | If `to` contains [a template pattern](https://webpack.js.org/configuration/output/#template-strings) | ##### `'dir'` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "path/to/file.txt", to: "directory/with/extension.ext", toType: "dir", }, ], }), ], }; ``` ##### `'file'` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "path/to/file.txt", to: "file/without/extension", toType: "file", }, ], }), ], }; ``` ##### `'template'` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/", to: "dest/[name].[contenthash][ext]", toType: "template", }, ], }), ], }; ``` #### `force` Type: ```ts type force = boolean; ``` Default: `false` Overwrites files already in `compilation.assets` (usually added by other plugins/loaders). **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/**/*", to: "dest/", force: true, }, ], }), ], }; ``` #### `priority` Type: ```ts type priority = number; ``` Default: `0` Allows to specify the priority of copying files with the same destination name. Files for patterns with higher priority will be copied later. To overwrite files, the [`force`](#force) option must be enabled. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ // Copied second and will overwrite "dir_2/file.txt" { from: "dir_1/file.txt", to: "newfile.txt", force: true, priority: 10, }, // Copied first { from: "dir_2/file.txt", to: "newfile.txt", priority: 5, }, ], }), ], }; ``` #### `transform` Type: ```ts type transform = | { transformer: (input: string, absoluteFilename: string) => string | Buffer; cache?: boolean | TransformerCacheObject | undefined; } | ((input: string, absoluteFilename: string) => string | Buffer); ``` Default: `undefined` Allows to modify the file contents. ##### `function` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", // The `content` argument is a [`Buffer`](https://nodejs.org/api/buffer.html) object, it could be converted to a `String` to be processed using `content.toString()` // The `absoluteFrom` argument is a `String`, it is absolute path from where the file is being copied transform(content, absoluteFrom) { return optimize(content); }, }, ], }), ], }; ``` ##### `object` | Name | Default | Description | | :-------------------------------: | :---------: | :--------------------------------------------------------------------------------------------------------------- | | **[`transformer`](#transformer)** | `undefined` | Allows to modify the file contents. | | **[`cache`](#cache)** | `false` | Enable `transform` caching. You can use `transform: { cache: { key: 'my-cache-key' } }` to invalidate the cache. | ###### `transformer` Type: ```ts type transformer = (input: string, absoluteFilename: string) => string; ``` Default: `undefined` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", // The `content` argument is a [`Buffer`](https://nodejs.org/api/buffer.html) object, it could be converted to a `String` to be processed using `content.toString()` // The `absoluteFrom` argument is a `String`, it is absolute path from where the file is being copied transform: { transformer(content, absoluteFrom) { return optimize(content); }, }, }, ], }), ], }; ``` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", transform: { transformer(content, path) { return Promise.resolve(optimize(content)); }, }, }, ], }), ], }; ``` ###### `cache` Type: ```ts type cache = | boolean | { keys: { [key: string]: any; }; } | { keys: ( defaultCacheKeys: { [key: string]: any; }, absoluteFilename: string, ) => Promise<{ [key: string]: any; }>; } | undefined; ``` Default: `false` **webpack.config.js** Enable/disable and configure caching. Default path to cache directory: `node_modules/.cache/copy-webpack-plugin`. ###### `boolean` Enables/Disable `transform` caching. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", transform: { transformer(content, path) { return optimize(content); }, cache: true, }, }, ], }), ], }; ``` ##### `object` Enables `transform` caching and setup invalidation keys. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", transform: { transformer(content, path) { return optimize(content); }, cache: { keys: { // May be useful for invalidating cache based on external values // For example, you can invalid cache based on `process.version` - { node: process.version } key: "value", }, }, }, }, ], }), ], }; ``` You can setup invalidation keys using a function. Simple function: **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", transform: { transformer(content, path) { return optimize(content); }, cache: { keys: (defaultCacheKeys, absoluteFrom) => { const keys = getCustomCacheInvalidationKeysSync(); return { ...defaultCacheKeys, keys, }; }, }, }, }, ], }), ], }; ``` Async function: **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/*.png", to: "dest/", transform: { transformer(content, path) { return optimize(content); }, cache: { keys: async (defaultCacheKeys, absoluteFrom) => { const keys = await getCustomCacheInvalidationKeysAsync(); return { ...defaultCacheKeys, keys, }; }, }, }, }, ], }), ], }; ``` #### `transformAll` Type: ```ts type transformAll = ( data: { data: Buffer; sourceFilename: string; absoluteFilename: string; }[], ) => any; ``` Default: `undefined` Allows you to modify the contents of multiple files and save the result to one file. > **Note** > > The `to` option must be specified and point to a file. It is allowed to use only `[contenthash]` and `[fullhash]` template strings. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/**/*.txt", to: "dest/file.txt", // The `assets` argument is an assets array for the pattern.from ("src/**/*.txt") transformAll(assets) { const result = assets.reduce((accumulator, asset) => { // The asset content can be obtained from `asset.source` using `source` method. // The asset content is a [`Buffer`](https://nodejs.org/api/buffer.html) object, it could be converted to a `String` to be processed using `content.toString()` const content = asset.data; accumulator = `${accumulator}${content}\n`; return accumulator; }, ""); return result; }, }, ], }), ], }; ``` ### `noErrorOnMissing` Type: ```ts type noErrorOnMissing = boolean; ``` Default: `false` Doesn't generate an error on missing file(s). ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: path.resolve(__dirname, "missing-file.txt"), noErrorOnMissing: true, }, ], }), ], }; ``` #### `info` Type: ```ts type info = | Record | ((item: { absoluteFilename: string; sourceFilename: string; filename: string; toType: ToType; }) => Record); ``` Default: `undefined` Allows to add assets info. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ "relative/path/to/file.ext", { from: "**/*", // Terser skip this file for minimization info: { minimized: true }, }, ], }), ], }; ``` **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ "relative/path/to/file.ext", { from: "**/*", // Terser skip this file for minimization info: (file) => ({ minimized: true }), }, ], }), ], }; ``` ### Options - [`concurrency`](#concurrency) #### `concurrency` type: ```ts type concurrency = number; ``` default: `100` limits the number of simultaneous requests to fs **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [...patterns], options: { concurrency: 50 }, }), ], }; ``` ### Examples #### Different variants of `from` (`glob`, `file` or `dir`). Take for example the following file structure: ``` src/directory-nested/deep-nested/deepnested-file.txt src/directory-nested/nested-file.txt ``` ##### From is a Glob Everything that you specify in `from` will be included in the result: **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/directory-nested/**/*", }, ], }), ], }; ``` Result: ```txt src/directory-nested/deep-nested/deepnested-file.txt, src/directory-nested/nested-file.txt ``` If you don't want the result paths to start with `src/directory-nested/`, then you should move `src/directory-nested/` to `context`, such that only the glob pattern `**/*` remains in `from`: **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "**/*", context: path.resolve(__dirname, "src", "directory-nested"), }, ], }), ], }; ``` Result: ```txt deep-nested/deepnested-file.txt, nested-file.txt ``` ##### From is a Dir **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: path.resolve(__dirname, "src", "directory-nested"), }, ], }), ], }; ``` Result: ```txt deep-nested/deepnested-file.txt, nested-file.txt ``` Technically, this is `**/*` with a predefined context equal to the specified directory. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "**/*", context: path.resolve(__dirname, "src", "directory-nested"), }, ], }), ], }; ``` Result: ```txt deep-nested/deepnested-file.txt, nested-file.txt ``` ##### From is a File ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: path.resolve( __dirname, "src", "directory-nested", "nested-file.txt", ), }, ], }), ], }; ``` Result: ```txt nested-file.txt ``` Technically, this is a filename with a predefined context equal to `path.dirname(pathToFile)`. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "nested-file.txt", context: path.resolve(__dirname, "src", "directory-nested"), }, ], }), ], }; ``` Result: ```txt nested-file.txt ``` #### Ignoring files **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: path.posix.join( path.resolve(__dirname, "src").replace(/\\/g, "/"), "**/*", ), globOptions: { ignore: [ // Ignore all `txt` files "**/*.txt", // Ignore all files in all subdirectories "**/subdir/**", ], }, }, ], }), ], }; ``` #### Flatten copy Removes all directory references and only copies file names. > **Warning** > > If files have the same name, the result is non-deterministic. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: "src/**/*", to: "[name][ext]", }, ], }), ], }; ``` Result: ```txt file-1.txt file-2.txt nested-file.txt ``` #### Copy in new directory **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { // When copying files starting with a dot, must specify the toType option // toType: "file", to({ context, absoluteFilename }) { return `newdirectory/${path.relative(context, absoluteFilename)}`; }, from: "directory", }, ], }), ], }; ``` Result: ```txt "newdirectory/file-1.txt", "newdirectory/nestedfile.txt", "newdirectory/nested/deep-nested/deepnested.txt", "newdirectory/nested/nestedfile.txt", ``` #### Skip running JavaScript files through a minimizer Useful if you need to simply copy `*.js` files to destination "as is" without evaluating and minimizing them using Terser. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ "relative/path/to/file.ext", { from: "**/*", // Terser skip this file for minimization info: { minimized: true }, }, ], }), ], }; ``` ##### `yarn workspaces` and `monorepos` When using `yarn workspaces` or` monorepos`, relative copy paths from node_modules can be broken due to the way packages are hoisting. To avoid this, should explicitly specify where to copy the files from using `require.resolve`. **webpack.config.js** ```js module.exports = { plugins: [ new CopyPlugin({ patterns: [ { from: `${path.dirname( require.resolve(`${moduleName}/package.json`), )}/target`, to: "target", }, ], }), ], }; ``` ## Contributing Please take a moment to read our contributing guidelines if you haven't yet done so. [CONTRIBUTING](./.github/CONTRIBUTING.md) ## License [MIT](./LICENSE) [npm]: https://img.shields.io/npm/v/copy-webpack-plugin.svg [npm-url]: https://npmjs.com/package/copy-webpack-plugin [node]: https://img.shields.io/node/v/copy-webpack-plugin.svg [node-url]: https://nodejs.org [tests]: https://github.com/webpack-contrib/copy-webpack-plugin/workflows/copy-webpack-plugin/badge.svg [tests-url]: https://github.com/webpack-contrib/copy-webpack-plugin/actions [cover]: https://codecov.io/gh/webpack-contrib/copy-webpack-plugin/branch/master/graph/badge.svg [cover-url]: https://codecov.io/gh/webpack-contrib/copy-webpack-plugin [discussion]: https://img.shields.io/github/discussions/webpack/webpack [discussion-url]: https://github.com/webpack/webpack/discussions [size]: https://packagephobia.now.sh/badge?p=copy-webpack-plugin [size-url]: https://packagephobia.now.sh/result?p=copy-webpack-plugin [glob-options]: https://github.com/sindresorhus/globby#options

	Stars	Issues	Version	Updated	Created
copy-webpack-plugin	2,827	11	12.0.2	4 months ago	9 years ago
copyfiles	405	53	2.4.1	3 years ago	10 years ago
cpx	523	36	1.5.0	8 years ago	9 years ago
ncp			2.0.0	9 years ago	13 years ago
node-fs-extra			0.8.2	7 years ago	10 years ago

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