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Summary: Finally, a place where `Button` is properly introduced. This is based on the old Handling Touches guide, which has been simplified (with some content moved over to the scroll views tutorial). I've also updated the ordering of the guides into something that makes more sense to someone just getting started with React Native. Closes https://github.com/facebook/react-native/pull/14371 Differential Revision: D5201127 Pulled By: hramos fbshipit-source-id: 819192e2db9febb8a315f51693dae557752b6002
39 lines
1.8 KiB
Markdown
39 lines
1.8 KiB
Markdown
---
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id: understanding-cli
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title: Understanding the CLI
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layout: docs
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category: Guides
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permalink: docs/understanding-cli.html
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banner: ejected
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next: native-modules-ios
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previous: testing
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---
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Though you may have installed the `react-native-cli` via npm as a separate module, it is a shell for accessing the CLI embedded
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in the React Native of each project. Your commands and their effects are dependent on the version of the module of `react-native`
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in context of the project. This guide will give a brief overview of the CLI in the module.
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# The local CLI
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React Native has a [`local-cli`](https://github.com/facebook/react-native/tree/master/local-cli) folder with a file named
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[`cliEntry.js`](https://github.com/facebook/react-native/blob/master/local-cli/cliEntry.js). Here, the commands are read
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from `commands.js` and added as possible CLI commands. _E.G._ the `react-native link` command, exists in the
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[`react-native/local-cli/link`](https://github.com/facebook/react-native/blob/master/local-cli/link/) folder, and is
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required in `commands.js`, which will register it as a documented command to be exposed to the CLI.
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# Command definitions
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At the end of each command entry is an export. The export is an object with a function to perform, description of the command, and the command name. The object structure for the `link` command looks like so:
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```js
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module.exports = {
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func: link,
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description: 'links all native dependencies',
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name: 'link [packageName]',
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};
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```
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### Parameters
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The command name identifies the parameters that a command would expect. When the command parameter is surrounded by greater-than, less-than symbols `< >`, this indicates that the parameter is expected. When a parameter is surrounded by brackets `[ ]`, this indicates that the parameter is optional.
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