jsii-srcmak

What is jsii-srcmak?

The jsii-srcmak npm package is a tool that allows you to generate source code in multiple programming languages from a single TypeScript source. It leverages the jsii (JavaScript Interoperability Interface) framework to achieve this, making it easier to maintain and distribute libraries across different languages.

What are jsii-srcmak's main functionalities?

Generate Python Code

This feature allows you to generate Python code from a TypeScript entry point. The generated code will be placed in the specified output directory.

const srcmak = require('jsii-srcmak');

srcmak({
  outdir: 'output-directory',
  targets: ['python'],
  entrypoint: 'index.ts'
});

Generate Java Code

This feature allows you to generate Java code from a TypeScript entry point. The generated code will be placed in the specified output directory.

const srcmak = require('jsii-srcmak');

srcmak({
  outdir: 'output-directory',
  targets: ['java'],
  entrypoint: 'index.ts'
});

Generate C# Code

This feature allows you to generate C# code from a TypeScript entry point. The generated code will be placed in the specified output directory.

const srcmak = require('jsii-srcmak');

srcmak({
  outdir: 'output-directory',
  targets: ['csharp'],
  entrypoint: 'index.ts'
});

Other packages similar to jsii-srcmak

jsii

The jsii package is the core framework that enables the generation of multi-language libraries from TypeScript code. It provides the underlying functionality that jsii-srcmak leverages to generate source code in different languages.

projen

Projen is a tool for managing project configuration files for various programming languages. While it does not generate source code like jsii-srcmak, it helps in managing and maintaining project configurations, which can be complementary to the functionalities provided by jsii-srcmak.

typescript

The TypeScript package itself is essential for writing the source code that jsii-srcmak will convert into other languages. It provides the type-checking and transpilation capabilities that are foundational to the process.

README

jsii-srcmak

Generates jsii source files for multiple languages from TypeScript.

Usage

This package can be either used as a library or through a CLI.

The library entry point is the srcmak function:

import { srcmak } from 'jsii-srcmak';
await srcmak(srcdir[, options]);

The CLI is jsii-srcmak:

$ jsii-srcmak srcdir [OPTIONS]

The srcdir argument points to a directory tree that includes TypeScript files which will be translated through jsii to one of the supported languages.

Compile only

If called with no additional arguments, srcmak will only jsii-compile the source. If compilation fails, it will throw an error. This is a nice way to check if generated typescript code is jsii-compatible:

const srcdir = generateSomeTypeScriptCode();

// verify it is jsii-compatible (throws otherwise)
await srcmak(srcdir);

CLI:

$ jsii-srcmak /source/directory

Python Output

To produce a Python module from your source, use the python option:

await srcmak('srcdir', {
  python: {
    outdir: '/path/to/project/root',
    moduleName: 'name.of.python.module'
  }
});

Or the --python-* switches in the CLI:

$ jsii-srcmak /src/dir --python-outdir=dir --python-module-name=module.name

• The outdir/--python-outdir option points to the root directory of your Python project.
• The moduleName/--python-module-name option is the python module name. Dots (.) delimit submodules.

The output directory will include a python module that corresponds to the original module. This code depends on the following python modules:

• jsii

Java Output

To produce a Java module from your source, use the java option:

await srcmak('srcdir', {
  java: {
    outdir: '/path/to/project/root',
    package: 'hello.world'
  }
});

Or the --java-* switches in the CLI:

$ jsii-srcmak /src/dir --java-outdir=dir --java-package=hello.world

• The outdir/--java-outdir option points to the root directory of your Java project.
• The package/--java-package option is the java package name.

The output directory will include a java module that corresponds to the original module. This code depends on the following maven package (should be defined directly or indirectly in the project's pom.xml file):

• jsii

The output directory will also include a tarball [e-mail] that must be bundled in your project.

C# Output

To produce a C# module from your source, use the csharp option:

await srcmak('srcdir', {
  csharp: {
    outdir: '/path/to/project/root',
    namespace: 'HelloWorld'
  }
});

Or the --csharp-* switches in the CLI:

$ jsii-srcmak /src/dir --csharp-outdir=dir --csharp-namespace=HelloWorld

• The outdir/--csharp-outdir option points to the root directory of your C# project.
• The package/--csharp-namespace option is the C# root namespace.

The output directory will include a C# project that corresponds to the original module. This code depends on the following NuGet package (It is already defined as a dependency in the generated project):

• jsii

The output directory will also include a tarball [e-mail] that must be bundled in your project (It is already included as an embedded resource in the generated project).

Go Output

To produce a Go module from your source, use the golang option:

await srcmak('srcdir', {
  golang: {
    outdir: '/path/to/project/root',
    moduleName: 'github.com/yourorg/your-root-project',
    packageName: 'helloworld'
  }
});

Or the --golang-* switches in the CLI:

$ jsii-srcmak /src/dir --golang-outdir=dir --golang-module="github.com/yourorg/your-root-project" --golang-package="helloworld"

• The outdir/--golang-outdir option points to the root directory of your base Go project (where your go.mod is in, if you have one).
• The moduleName/--golang-module option must match the Go module name of the project that includes the generated source code e.g. github.com/yourorg/your-root-project. This is currently required, because the generated code needs to reference a submodule which is generated in a nested directory (see also upstream issue https://github.com/aws/jsii/issues/2847 for more information).
• The packageName/--golang-package is the package in which the generated Go code will be in. It will be placed in the submodule. So the import path becomes e.g. github.com/yourorg/your-root-project/yourpackage.

The output directory will include a directory named with the packageName/--golang-package containing the generated Go code. This code depends on the following Go module:

• jsii-runtime-go

which you need to include in your go.mod:

require github.com/aws/jsii-runtime-go v1.29.0 # update the version to match the jsii version used in your version of jsii-srcmak

Nested output directories

It is also possible to set the outdir/--golang-outdir option to a nested directory inside your Go project. For example, if you want to nest the generated code in a directory called generated. In that case you need to append the subdirectory to the module name (e.g. github.com/yourorg/your-root-project/generated):

$ jsii-srcmak /src/dir --golang-outdir=~/projects/your-root-project/generated --golang-module="github.com/yourorg/your-root-project/generated" --golang-package="helloworld"

Your import path will then become e.g. github.com/yourorg/your-root-project/generated/yourpackage.

Entrypoint

The entrypoint option can be used to customize the name of the typescript entrypoint (default is index.ts).

For example, if the code's entry point is under /srcdir/foobar/lib/index.ts then I can specify:

await srcmak('/srcdir', {
  entrypoint: 'foobar/lib/index.ts'
});

Or through the CLI:

$ jsii-srcmak /srcdir --entrypoint lib/main.ts

Dependencies

The deps option can be used to specify a list of node module directories (must have a package.json file) which will be symlinked into the workspace when compiling your code.

This is required if your code references types from other modules.

Use this idiom to resolve a set of modules directories from the calling process:

const modules = [
  '@types/node', // commonly needed
  'foobar'       // a node module in *my* closure
];

const getModuleDir = m =>
  path.dirname(require.resolve(`${m}/package.json`));

await srcmak('srcdir', {
  deps: modules.map(getModuleDir)
});

Or through the CLI:

$ jsii-srcmak /src/dir --dep node_modules/@types/node --dep node_modules/constructs

Contributing

To build this project, you must first generate the package.json:

npx projen

Then you can install your dependencies and build:

yarn install
yarn build

What's with this name?

It's a silly little pun that stems from another pun: jsii has jsii-pacmak which stands for "package maker". That's the tool that takes in a .jsii manifest and produces language-idiomatic packages from it. This tool produces sources from a .jsii manifest. Hence, "source maker". Yeah, it's lame.

License

Distributed under the Apache 2.0 license.