Download and Unzip gz file.

[Artem Sierikov]

Hi! I'm new to bazel. I need to unzip file file.gz  to two files:

• one.txt
• two.mmdb

So I can pass them to the binary rule as resource files. 

I can download it with the HTTP rule but how can I unzip it and reuse its content later?

[Daniel Halperin]

You probably want to use http_archive with build_file_content.

Bazel docs: https://docs.bazel.build/versions/master/repo/http.html#http_archive-build_file_content

One example from the web: https://git.eclipse.org/r/plugins/gitiles/jgit/jgit/+/master/WORKSPACE#30

In the example, you could refer to @openjdk15_darwin_archive//:runtime . If you ditched the java_runtime bit and instead did

exports_files(["one.txt", "two.mmdb"], visibility = ["//visibility:public"])

it you could refer to @openjdk15_darwin_archive//:one.txt.

Dan

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[Artem Sierikov]

Thanks for the solution! Turns out I need to download and extract the single file with a .gz extension. And use its content. For example, I download some_file.db.gz, and then I need to be able to reference some_file.db. 

Can I simply do something like this?

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")

http_file(

  name = "my_gz_file",

  urls = ["http://example.com/some_file.gz"],

  sha256 = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",

)

And then reference its content 

@my_gz_file//file

If not how can I do it properly?

Artem