genrule(
    name = "release_manifest",
    srcs = ["version.txt"],
    tools = ["generate_manifest.sh"],
    outs = ["release-manifest.txt"],
    cmd = "$(location generate_manifest.sh) $(location version.txt) $@",
)

genrule(
    name = "verify_release",
    srcs = [":release_manifest"],
    outs = ["verified.txt"],
    cmd = "grep -qx 'version=1.0.0' $(location :release_manifest) && " +
          "grep -qx 'mode=release' $(location :release_manifest) && " +
          "echo 'Release manifest verified' > $@",
)