# Copyright 2017 The Bazel Authors. All rights reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Install NodeJS when the user runs node_repositories() from their WORKSPACE.

We fetch a specific version of Node, to ensure builds are hermetic.

We then create a repository @nodejs which provides the

node binary to other rules.

"""

def _node_impl(repository_ctx):

node = "bin/node"

npm = "bin/npm"

os_name = repository_ctx.os.name.lower()

if os_name.startswith("mac os"):

repository_ctx.download_and_extract(

[

"http://mirror.bazel.build/nodejs.org/dist/v6.10.2/node-v6.10.2-darwin-x64.tar.xz",

"https://nodejs.org/dist/v6.10.2/node-v6.10.2-darwin-x64.tar.xz",

],

stripPrefix = "node-v6.10.2-darwin-x64",

sha256 = "360b887361b2597613f18968e3fc0e920079a363d0535fc4e40532e3426fc6eb"

)

elif os_name.find("windows") != -1:

repository_ctx.download_and_extract(

[

"http://mirror.bazel.build/nodejs.org/dist/v6.10.2/node-v6.10.2-win-x64.zip",

"http://nodejs.org/dist/v6.10.2/node-v6.10.2-win-x64.zip",

],

stripPrefix = "node-v6.10.2-win-x64",

sha256 = "d778ed84685c6604192cfcf40192004e27fb11c9e65c3ce4b283d90703b4192c"

)

# The windows distribution of nodejs has the binaries in different paths

node = "node.exe"

npm = "npm.cmd"

else:

repository_ctx.download_and_extract(

[

"http://mirror.bazel.build/nodejs.org/dist/v6.10.2/node-v6.10.2-linux-x64.tar.xz",

"http://nodejs.org/dist/v6.10.2/node-v6.10.2-linux-x64.tar.xz",

],

stripPrefix = "node-v6.10.2-linux-x64",

sha256 = "b519cd616b0671ab789d2645c5c026deb7e016d73a867ab4b1b8c9ceba9c3503"

)

repository_ctx.file("BUILD.bazel", content="""#Generated by node_install.bzl

package(default_visibility = ["//visibility:public"])

exports_files([

"{0}",

"{1}",

])

alias(name = "node", actual = "{0}")

alias(name = "npm", actual = "{1}")

""".format(node, npm))

_node_repo = repository_rule(_node_impl, attrs = {})

# def _write_node_modules_impl(ctx):

# WORKAROUND for https://github.com/bazelbuild/bazel/issues/374#issuecomment-296217940

# Bazel does not allow labels to start with `@`, so when installing eg. the `@types/node`

# module from the @types scoped package, you'll get an error.

# The workaround is to move the rule up one level, from /node_modules to the project root.

# For now, users must instead write their own /BUILD file on setup.

# ctx.symlink(project_dir.get_child("node_modules"), "node_modules")

# add a BUILD file inside the user's node_modules project folder

# ctx.file("installed/BUILD", """

# filegroup(name = "node_modules", srcs = glob(["node_modules/**/*"]), visibility = ["//visibility:public"])

# """)

# _write_node_modules = repository_rule(

# _write_node_modules_impl,

# attrs = { "package_json": attr.label() },

# )

def _yarn_impl(ctx):

# Yarn is a package manager that downloads dependencies. Yarn is an improvement over the `npm` tool in

# speed and correctness. We download a specific version of Yarn to ensure a hermetic build.

ctx.file("BUILD.bazel", """

package(default_visibility = ["//visibility:public"])

sh_binary(

name = "yarn",

srcs = ["yarn.sh"],

)

""")

if ctx.os.name.lower().find("windows") != -1:

node = Label("@nodejs//:node.exe")

else:

node = Label("@nodejs//:bin/node")

ctx.file("yarn.sh", "#!/bin/bash" + "".join(["""

ROOT="{}"

NODE="{}"

SCRIPT="{}"

(cd "$ROOT"; "$NODE" "$SCRIPT" "$@")

""".format(

ctx.path(package_json).dirname,

ctx.path(node),

ctx.path("bin/yarn.js"))

for package_json in ctx.attr.package_json]), executable = True)

ctx.download_and_extract(

[

"http://mirror.bazel.build/github.com/yarnpkg/yarn/releases/download/v0.22.0/yarn-v0.22.0.tar.gz",

"https://github.com/yarnpkg/yarn/releases/download/v0.22.0/yarn-v0.22.0.tar.gz",

],

stripPrefix = "dist",

sha256 = "e295042279b644f2bc3ea3407a2b2fb417a200d35590b0ec535422d21cf19a09"

)

_yarn_repo = repository_rule(

_yarn_impl,

attrs = { "package_json": attr.label_list() },

)

load(":check_bazel_version.bzl", "check_bazel_version")

def node_repositories(package_json):

# Windows users need sh_binary wrapped as an .exe

check_bazel_version("0.5.4")

_node_repo(name = "nodejs")

_yarn_repo(name = "yarn", package_json = package_json)