Ecosyste.ms: Packages
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Packages in the Plugin directory contain plugins for [goa v2](https://godoc.org/goa.design/goa). Plugins can extend the goa DSL, generate new artifacts and modify the output of existing generators. There are currently two plugins in the directory: The [goakit](https://godoc.org/goa.design/plugins/goakit) plugin generates code that integrates with the [go-kit](https://github.com/go-kit/kit) library. The [cors](https://godoc.org/goa.design/plugins/cors) plugin adds new DSL to define CORS policies. The plugin generates HTTP server code that respond to CORS requests in compliance with the policies defined in the design. Writing a plugin consists of two steps: 1. Writing the functions that gets called by the goa tool during code generation. 2. Registering the functions with the goa tool. A plugin may implement the "gen" goa command, the "example" goa command or both. In each case a plugin may register one or two functions: the first function called "Prepare" gets called prior to any code generation actually happening. The function can modify the design data structures before goa uses them to generate code. The second function called "Generate" does the actual code generation. The signature of the Generate function is: where: The function must return the entire set of generated files (even the files that the plugin does not modify). The functions must then be registered with the goa code generator tool using the "RegisterPlugin" function of the "codegen" package. This is typically done in a package "init" function, for example: The first argument of RegisterPlugin must be one of "gen" or "example" and specifies the "goa" command that triggers the call to the plugin functions. The second argument is the Prepare function if any, nil otherwise. The last argument is the code generator function if any, nil otherwise. A plugin may introduce new DSL "keywords" (typically Go package functions). The DSL functions initialize the content of a design root object (an object that implements the "eval.Root" interface), for example: The [eval](https://godoc.org/goa.design/goa/codegen/eval) package contains a number of functions that can be leveraged to implement the DSL such as error reporting functions. The plugin design root object is then given to the plugin Generate function (if there's one) which may take advantage of it to generate the code.
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purl: pkg:golang/github.com/goadesign/plugins
Keywords: go-kit, goa
License: MIT
Latest release: over 3 years ago
First release: about 5 years ago
Namespace: github.com/goadesign
Stars: 57 on GitHub
Forks: 33 on GitHub
See more repository details: repos.ecosyste.ms
Last synced: 17 days ago