.github/workflows/release_prep.sh

#!/usr/bin/env bash

set -o errexit -o nounset -o pipefail

# Set by GH actions, see
# https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables
TAG=${GITHUB_REF_NAME}
# The prefix is chosen to match what GitHub generates for source archives
PREFIX="bazel_features-${TAG:1}"
ARCHIVE="bazel_features-$TAG.tar.gz"
git archive --format=tar --prefix=${PREFIX}/ ${TAG} | gzip > $ARCHIVE
SHA=$(shasum -a 256 $ARCHIVE | awk '{print $1}')

# Add generated API docs to the release, see https://github.com/bazelbuild/bazel-central-registry/issues/5593
docs="$(mktemp -d)"; targets="$(mktemp)"
bazel --output_base="$docs" query --output=label --output_file="$targets" 'kind("starlark_doc_extract rule", //...)'
bazel --output_base="$docs" build --target_pattern_file="$targets"
tar --create --auto-compress \
    --directory "$(bazel --output_base="$docs" info bazel-bin)" \
    --file "$GITHUB_WORKSPACE/${ARCHIVE%.tar.gz}.docs.tar.gz" .

cat << EOF
## Using Bzlmod with Bazel 6

1. Enable with \`common --enable_bzlmod\` in \`.bazelrc\`.
2. Add to your \`MODULE.bazel\` file:

\`\`\`starlark
bazel_dep(name = "bazel_features", version = "${TAG:1}")
\`\`\`

## Using WORKSPACE

Paste this snippet into your `WORKSPACE.bazel` file:

\`\`\`starlark
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
http_archive(
    name = "bazel_features",
    sha256 = "${SHA}",
    strip_prefix = "${PREFIX}",
    url = "https://github.com/bazel-contrib/bazel_features/releases/download/${TAG}/${ARCHIVE}",
)
load("@bazel_features//:deps.bzl", "bazel_features_deps")
bazel_features_deps()
\`\`\`
EOF