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crystal: add page (#2334)

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Aaron Tan 2018-09-14 11:58:02 -04:00 committed by Starbeamrainbowlabs
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# crystal
> Tool for managing crystal source code.
- Run a crystal file:
`crystal {{path/to/file.cr}}`
- Compile a file and all dependencies to a single executable:
`crystal build {{path/to/file.cr}}`
- Start a local interactive server for testing the language:
`crystal play`
- Create a project directory for a crystal application:
`crystal init app {{application_name}}`
- Display all help options:
`crystal help`