Build the code:
$ go get github.com/google/skylark/... $ go build github.com/google/skylark/cmd/skylark
Run the interpreter:
$ cat coins.sky coins = { 'dime': 10, 'nickel': 5, 'penny': 1, 'quarter': 25, } print('By name:\t' + ', '.join(sorted(coins.keys()))) print('By value:\t' + ', '.join(sorted(coins.keys(), key=coins.get))) $ ./skylark coins.sky By name: dime, nickel, penny, quarter By value: penny, nickel, dime, quarter
Interact with the read-eval-print loop (REPL):
$ ./skylark >>> def fibonacci(n): ... res = list(range(n)) ... for i in res[2:]: ... res[i] = res[i-2] + res[i-1] ... return res ... >>> fibonacci(10) [0, 1, 1, 2, 3, 5, 8, 13, 21, 34] >>>
When you have finished, type Ctrl-D
to close the REPL's input stream.
We welcome submissions but please let us know what you're working on if you want to change or add to the Skylark repository.
Before undertaking to write something new for the Skylark project, please file an issue or claim an existing issue. All significant changes to the language or to the interpreter's Go API must be discussed before they can be accepted. This gives all participants a chance to validate the design and to avoid duplication of effort.
Despite some differences, the Go implementation of Skylark strives to match the behavior of the Java implementation used by Bazel. For that reason, proposals to change the language itself should generally be directed to the Bazel team, not to the maintainers of this project. Only once there is consensus that a language change is desirable may its Go implementation proceed.
We use GitHub pull requests for contributions.
Please complete Google's contributor license agreement (CLA) before sending your first change to the project. If you are the copyright holder, you will need to agree to the individual contributor license agreement, which can be completed online. If your organization is the copyright holder, the organization will need to agree to the corporate contributor license agreement. If the copyright holder for your contribution has already completed the agreement in connection with another Google open source project, it does not need to be completed again.
We reserve the right to make breaking language and API changes at this stage in the project, although we will endeavor to keep them to a minimum. Now that the project's long-term name (“Starlark”) has been decided, we plan to copy this repository to github.com/google/starlark and change the canonical import path for all packages to starlark.net/starlark. The current github.com/google/skylark repository will be frozen. Once the Bazel team has finalized the version 1 language specification, we will be more rigorous with interface stability.
Skylark was designed and implemented in Java by Ulf Adams, Lukács Berki, Jon Brandvein, John Field, Laurent Le Brun, Dmitry Lomov, Damien Martin-Guillerez, Vladimir Moskva, and Florian Weikert, standing on the shoulders of the Python community. The Go implementation was written by Alan Donovan and Jay Conrod; its scanner was derived from one written by Russ Cox.
Skylark in Go is Copyright (c) 2017 The Bazel Authors. All rights reserved.
It is provided under a 3-clause BSD license: LICENSE.
The name “Skylark” is a code name of the Bazel project. The Bazel team plans to rename the language to “Starlark” to reflect its applicability to projects unrelated to Bazel.
Skylark in Go is not an official Google product.