distro/relnotes.bzl

"""Release notes generator"""

def print_rel_notes(*, name, version, archive):
    native.genrule(
        name = name,
        outs = [name + ".txt"],
        cmd = """
              last_rel=$$(curl -s https://api.github.com/repos/bazelbuild/rules_java/releases/latest  | grep 'tag_name' | cut -d: -f2 | tr -cd '[:alnum:].')
              changelog=$$(/usr/bin/git log tags/$$last_rel..origin/master --format=oneline --)
              sha=$$(/usr/bin/sha256sum $(SRCS) | cut -d ' '  -f1)
              cat > $@ <<EOF
**Changes since $$last_rel**
$$changelog

**MODULE.bazel setup**
~~~
bazel_dep(name = "rules_java", version = "{VERSION}")
~~~

**WORKSPACE setup**
~~~
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
http_archive(
    name = "rules_java",
    urls = [
        "https://github.com/bazelbuild/rules_java/releases/download/{VERSION}/rules_java-{VERSION}.tar.gz",
    ],
    sha256 = "$$sha",
)

load("@rules_java//java:rules_java_deps.bzl", "rules_java_dependencies")
rules_java_dependencies()

# note that the following line is what is minimally required from protobuf for the java rules
# consider using the protobuf_deps() public API from @com_google_protobuf//:protobuf_deps.bzl
load("@com_google_protobuf//bazel/private:proto_bazel_features.bzl", "proto_bazel_features")  # buildifier: disable=bzl-visibility
proto_bazel_features(name = "proto_bazel_features")

# register toolchains
load("@rules_java//java:repositories.bzl", "rules_java_toolchains")
rules_java_toolchains()
~~~

**Using the rules**
See [the source](https://github.com/bazelbuild/rules_java/tree/{VERSION}).

EOF
              """.format(ARCHIVE = archive, VERSION = version),
        srcs = [archive],
        tags = ["local", "manual"],
    )