commit	cf23457555073c11d59f0ca570d68c4a658236af	[log] [tgz]
author	alexeagle <alexeagle@google.com>	Thu May 25 23:39:15 2017 +0200
committer	Florian Weikert <fwe@google.com>	Fri Jul 27 17:59:32 2018 +0200
tree	15bb12522184f2535c3bb8d7d41fe0be5114e4cf
parent	6646d09acaa4efda588937e442dd4d70508291d2 [diff]

tree: 15bb12522184f2535c3bb8d7d41fe0be5114e4cf

README.md

TypeScript rules for Bazel

WARNING: this is an early release with limited features. Breaking changes are likely. Not recommended for general use.

The TypeScript rules integrate the TypeScript compiler with Bazel.

Installation

First, install a current Bazel distribution.

Create a BUILD file in your project root:

package(default_visibility = ["//visibility:public"])
exports_files(["tsconfig.json"])

# NOTE: this will move to node_modules/BUILD in a later release
filegroup(name = "node_modules", srcs = glob(["node_modules/**/*"]))

Note, on Mac file paths are case-insensitive, so make sure there isn't already a build folder in the project root.

Next create a WORKSPACE file in your project root (or edit the existing one) containing:

load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")

git_repository(
    name = "io_bazel_rules_typescript",
    remote = "https://github.com/bazelbuild/rules_typescript.git",
    tag = "0.0.1",
)

load("@io_bazel_rules_typescript//:defs.bzl", "node_repositories", "yarn_install")

node_repositories()
yarn_install(package_json = "//:package.json")

Usage

Currently, the only available rule is ts_library which invokes the TypeScript compiler on one compilation unit (generally one directory of source files).

Create a BUILD file next to your sources:

package(default_visibility=["//visibility:public"])
load("@io_bazel_rules_typescript//:defs.bzl", "ts_library")

ts_library(
    name = "my_code",
    srcs = glob(["*.ts"]),
    deps = ["//path/to/other:library"],
    tsconfig = "//:tsconfig.json",
)

(Note that you may want to name the ts_library target the same as the enclosing directory, making it the default target in the package.)

Then build it:

bazel build //path/to/package:target

The resulting .d.ts file paths will be printed. Additionally, the .js outputs from TypeScript will be written to disk, next to the .d.ts files.

Notes

If you‘d like a “watch mode”, try https://github.com/bazelbuild/bazel-watcher (note, it’s also quite new).

At some point, we plan to release a tool similar to gazelle to generate the BUILD files from your source code.