Madge

Create graphs from your CommonJS, AMD or ES6 module dependencies

README

Last version

Madge is a developer tool for generating a visual graph of your module dependencies, finding circular dependencies, and giving you other useful info. Joel Kemp's awesome dependency-tree is used for extracting the dependency tree.

Works for JavaScript (AMD, CommonJS, and ES6 modules)

Also works for CSS preprocessors (Sass, Stylus, and Less)

NPM installed dependencies are excluded by default (can be enabled)

All core Node.js modules (assert, path, fs, etc) are excluded

Will traverse child dependencies automatically

Read the changelog for latest changes.

I've worked with Madge on my free time for the last couple of years and it's been a great experience. It started as an experiment but turned out to be a very useful tool for many developers. I have many ideas for the project and it would definitely be easier to dedicate more time to it with some financial support 🙏

Regardless of your contribution, thanks for your support!

Examples

Graph generated from madge's own code and dependencies.

A graph with circular dependencies. Blue has dependencies, green has no dependencies, and red has circular dependencies.

See it in action

Installation

```sh
npm -g install madge
```

Graphviz (optional)

Graphviz is only required if you want to generate visual graphs (e.g. in SVG or DOT format).

Mac OS X

```sh
brew install graphviz || port install graphviz
```

Ubuntu

```sh
apt-get install graphviz
```

API

madge(path: string|array|object, config: object)

path is a single file or directory, or an array of files/directories to read. A predefined tree can also be passed in as an object.

config is optional and should be the configuration to use.

Returns a Promise resolved with the Madge instance object.

Functions

.obj()

Returns an Object with all dependencies.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.obj());
});
```

.warnings()

Returns an Object of warnings.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.warnings());
});
```

.circular()

Returns an Array of all modules that have circular dependencies.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.circular());
});
```

.circularGraph()

Returns an Object with only circular dependencies.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.circularGraph());
});
```

.depends()

Returns an Array of all modules that depend on a given module.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.depends('lib/log.js'));
});
```

.orphans()

Return an Array of all modules that no one is depending on.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.orphans());
});
```

.leaves()

Return an Array of all modules that have no dependencies.

```javascript
const madge = require('madge');
madge('path/to/app.js').then((res) => {
console.log(res.leaves());
});
```

.dot([circularOnly: boolean])

Returns a Promise resolved with a DOT representation of the module dependency graph. Set circularOnly to only include circular dependencies.

```javascript
const madge = require('madge');
madge('path/to/app.js')
.then((res) => res.dot())
.then((output) => {
console.log(output);
});
```

.image(imagePath: string, [circularOnly: boolean])

Write the graph as an image to the given image path. Set circularOnly to only include circular dependencies. The image format to use is determined from the file extension. Returns aPromise resolved with a full path to the written image.

```javascript
const madge = require('madge');
madge('path/to/app.js')
.then((res) => res.image('path/to/image.svg'))
.then((writtenImagePath) => {
console.log('Image written to ' + writtenImagePath);
});
```

.svg()

Return a Promise resolved with the XML SVG representation of the dependency graph as a Buffer.

```javascript
const madge = require('madge');
madge('path/to/app.js')
.then((res) => res.svg())
.then((output) => {
console.log(output.toString());
});
```

Configuration

Property | Type | Default | Description

baseDir | String | null | Base directory to use instead of the default

includeNpm | Boolean | false | If shallow NPM modules should be included

fileExtensions | Array | ['js'] | Valid file extensions used to find files in directories

excludeRegExp | Array | false | An array of RegExp for excluding modules

requireConfig | String | null | RequireJS config for resolving aliased modules

webpackConfig | String | null | Webpack config for resolving aliased modules

tsConfig | String\|Object | null | TypeScript config for resolving aliased modules - Either a path to a tsconfig file or an object containing the config

layout | String | dot | Layout to use in the graph

rankdir | String | LR | Sets the direction of the graph layout

fontName | String | Arial | Font name to use in the graph

fontSize | String | 14px | Font size to use in the graph

backgroundColor | String | #000000 | Background color for the graph

nodeShape | String | box | A string specifying the shape of a node in the graph

nodeStyle | String | rounded | A string specifying the style of a node in the graph

nodeColor | String | #c6c5fe | Default node color to use in the graph

noDependencyColor | String | #cfffac | Color to use for nodes with no dependencies

cyclicNodeColor | String | #ff6c60 | Color to use for circular dependencies

edgeColor | String | #757575 | Edge color to use in the graph

graphVizOptions | Object | false | Custom Graphviz options

graphVizPath | String | null | Custom Graphviz path

detectiveOptions | Object | false | Custom detective options for dependency-tree and precinct

dependencyFilter | Function | false | Function called with a dependency filepath (exclude subtrees by returning false)

You can use configuration file either in .madgerc in your project or home folder or directly in package.json. Look here for alternative locations for the file.

.madgerc

```json
{
"fontSize": "10px",
"graphVizOptions": {
"G": {
"rankdir": "LR"
}
}
}
```

package.json

```json
{
"name": "foo",
"version": "0.0.1",
...
"madge": {
"fontSize": "10px",
"graphVizOptions": {
"G": {
"rankdir": "LR"
}
}
}
}
```

CLI

Examples

List dependencies from a single file

```sh
madge path/src/app.js
```

List dependencies from multiple files

```sh
madge path/src/foo.js path/src/bar.js
```

List dependencies from all *.js files found in a directory

```sh
madge path/src
```

List dependencies from multiple directories

```sh
madge path/src/foo path/src/bar
```

List dependencies from all .js and .jsx files found in a directory

```sh
madge --extensions js,jsx path/src
```

Finding circular dependencies

```sh
madge --circular path/src/app.js
```

Show modules that depends on a given module

```sh
madge --depends wheels.js path/src/app.js
```

Show modules that no one is depending on

```sh
madge --orphans path/src/
```

Show modules that have no dependencies

```sh
madge --leaves path/src/
```

Excluding modules

```sh
madge --exclude '^(foo|bar)\.js$' path/src/app.js
```

Save graph as a SVG image (requires Graphviz)

```sh
madge --image graph.svg path/src/app.js
```

Save graph with only circular dependencies

```sh
madge --circular --image graph.svg path/src/app.js
```

Save graph as a DOT file for further processing (requires Graphviz)

```sh
madge --dot path/src/app.js > graph.gv
```

Using pipe to transform tree (this example will uppercase all paths)

```sh
madge --json path/src/app.js | tr '[a-z]' '[A-Z]' | madge --stdin
```

Debugging

To enable debugging output if you encounter problems, run madge with the --debug option then throw the result in a gist when creating issues on GitHub.

```sh
madge --debug path/src/app.js
```

Running tests

```sh
npm install
npm test
```

Creating a release

```sh
npm run release
```

FAQ

Missing dependencies?

It could happen that the files you're not seeing have been skipped due to errors or that they can't be resolved. Run madge with the --warning option to see skipped files. If you need even more info run with the --debug option.

Using both Javascript and Typescript in your project?

Madge uses dependency-tree which uses filing-cabinet to resolve modules. However it requires configurations for each file type (js/jsx) and (ts/tsx). So provide bothwebpackConfig and tsConfig options to madge.

Using mixed import syntax in the same file?

Only one syntax is used by default. You can use both though if you're willing to take the degraded performance. Put this in your madge config to enable mixed imports.

For ES6 + CommonJS:

```json
{
"detectiveOptions": {
"es6": {
"mixedImports": true
}
}
}
```

For TypeScript + CommonJS:

```json
{
"detectiveOptions": {
"ts": {
"mixedImports": true
}
}
}
```

How to ignore import type statements in ES6 + Flow?

Put this in your madge config.

```json
{
"detectiveOptions": {
"es6": {
"skipTypeImports": true
}
}
}
```

How to ignore import in type annotations in TypeScript?

Put this in your madge config.

```json
{
"detectiveOptions": {
"ts": {
"skipTypeImports": true
}
}
}
```

Mixing TypesScript and Javascript imports?

Ensure you have this in your .tsconfig file.

```json
{
"compilerOptions": {
"module": "commonjs",
"allowJs": true
}
}
```

What's the "Error: write EPIPE" when exporting graph to image?

Ensure you have installed Graphviz. If you're running Windows, note that Graphviz is not added to thePATH variable during install. You should add the folder of gvpr.exe (typically %Graphviz_folder%/bin) to the PATH variable manually.

How do I fix the "Graphviz not built with triangulation library" error when using sfdp layout?

Homebrew doesn't include GTS by default. Fix this by doing:

```sh
brew uninstall graphviz
brew install gts
brew install graphviz
```

The image produced by madge is very hard to read, what's wrong?

Try running madge with a different layout, here's a list of the ones you can try:

dot "hierarchical" or layered drawings of directed graphs. This is the default tool to use if edges have directionality.

neato "spring model'' layouts. This is the default tool to use if the graph is not too large (about 100 nodes) and you don't know anything else about it. Neato attempts to

minimize a global energy function, which is equivalent to statistical multi-dimensional scaling.

fdp "spring model'' layouts similar to those of neato, but does this by reducing forces rather than working with energy.

sfdp multiscale version of fdp for the layout of large graphs.

twopi radial layouts, after Graham Wills 97. Nodes are placed on concentric circles depending their distance from a given root node.

circo circular layout, after Six and Tollis 99, Kauffman and Wiese 02. This is suitable for certain diagrams of multiple cyclic structures, such as certain telecommunications networks.