Add README and license

Author: 1e100

README.md

@@ -0,0 +1,27 @@
+# Cloud archive
+
+This `WORKSPACE` rule for Google Bazel lets you securely download private
+dependencies from S3.
+
+## Requirements
+
+This currently only works on Linux, although adapting it to macOS and Windows
+shouldn't be difficult. AWS CLI is required to be in the path, and must be set
+up such that you can download files from the buckets referenced in the rules
+with `aws s3 cp`. `--profile` flag is also supported, for people who use
+multiple profiles.
+
+## Usage
+
+Please refer to `WORKSPACE` file in this repository for an example of how to
+use this.
+
+## Future work
+
+Quite obviously this can also be adapted to other cloud storage providers,
+basically anything that can download an archive from the command line should
+work.
+
+## License
+
+This software is licensed under Apache 2.0.

cloud_archive.bzl

@@ -1,6 +1,8 @@
 # This rule will download an archive from S3, check sha256, extract it, and
 # symlink the provided BUILD file inside.
 
+# License: Apache 2.0
+
 
 def _s3_archive_impl(ctx):
     url = "s3://{}/{}".format(ctx.attr.bucket, ctx.attr.file_path)