Cake Addin for code generation via the OpenAPI Generator (f.k.a. Swagger Codegen)
The OpenAPI Generator tool provides a lot of powerful code generators, but since its implemented in Java, the only build tools directly supported are Maven and Gradle. This addin provides a simple wrapper around the command line version of the tool to invoke code generation from Cake.
Since the addin is available on NuGet, it can simply be registered in your build.cake file using the #addin preprocessor directive:
#addin nuget:?package=Cake.OpenApiGenerator&version=<version>As an additional dependency, Java needs to be installed and available to Cake. It may be either added to the PATH environment variable or registered manually in the build script:
Setup(context => {
context.Tools.RegisterFile("/path/to/java(.exe)");
});Once the addin is registered, the alias OpenApiGenerator provides a wrapper around the OpenAPI Generator.
The first example shows a minimal example for the method Generate:
Task("My-Task")
.Does(() =>
{
OpenApiGenerator.Generate(new OpenApiGeneratorGenerateSettings()
{
Specification = "specification.yaml",
Generator = "csharp",
OutputDirectory = "./src"
});
});Alternatively, you may pass an Action that configures the OpenApiGeneratorGenerateSettings:
OpenApiGenerator.Generate(settings =>
{
setttings.Specification = "specification.yaml";
// ...
})By default, the latest version of the OpenAPI generator will be resolved and used. Of course, this requires access to the Internet and may break builds that worked with previous tool versions. It is recommended to pin the tool version as shown in the example below:
Task("My-Task")
.Does(() =>
{
OpenApiGenerator["3.3.4"].Generate(...);
});This shorthand notation is useful for build scripts that only use the OpenApiGenerator once.
If there are multiple calls to the OpenApiGenerator, the version should be defined at the top of the build script or using a Setup method:
Setup(context =>
{
OpenApiGenerator.ToolPackage.Version = "3.3.4";
});OpenApiGenerator.Validate("specification.yaml", recommend: true);OpenApiGenerator.Batch("csharp-server.yaml", "javascript-client.yaml");
OpenApiGenerator.Batch(new OpenApiBatchSettings()
{
ConfigurationFiles = new FilePathCollection(new FilePath[] { "csharp-server.yaml", "javascript-client.yaml" })
// ...
});
OpenApiGenerator.Batch(settings =>
{
settings.ConfigurationFiles.Add("csharp-server.yaml");
settings.ConfigurationFiles.Add("javascript-client.yaml");
// ...
});Setup(context =>
{
OpenApiGenerator.ToolPackage = new MavenPackage("io.swagger", "swagger-codegen-cli");
});
Task("Swagger-Codegen")
.Does(() =>
{
OpenApiGenerator.Generate(new OpenApiGeneratorGenerateSettings()
{
Specification = "./petstore.json",
// Use Language (-l) instead of Generator (-g)
Language = "html",
OutputDirectory = "./src"
});
});Setup(context =>
{
OpenApiGenerator.ToolPath = context.Tools.Resolve("openapi-generator");
});The software is licensed under the MIT license.
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