move logtags rule from //build/make to //build/bazel

"""Event log tags generation rule"""

load("@bazel_skylib//lib:paths.bzl", "paths")

def _event_log_tags_impl(ctx):

    out_files = []

    for logtag_file in ctx.files.srcs:

        out_filename = paths.replace_extension(logtag_file.basename, ".java")

        out_file = ctx.actions.declare_file(out_filename)

        out_files.append(out_file)

        ctx.actions.run(

            inputs = [logtag_file],

            outputs = [out_file],

            arguments = [

                "-o",

                out_file.path,

                logtag_file.path,

            ],

            progress_message = "Generating Java logtag file from %s" % logtag_file.short_path,

            executable = ctx.executable._logtag_to_java_tool,

        )

    return [DefaultInfo(files = depset(out_files))]

event_log_tags = rule(

    implementation = _event_log_tags_impl,

    attrs = {

        "srcs": attr.label_list(allow_files = [".logtags"], mandatory = True),

        "_logtag_to_java_tool": attr.label(

            executable = True,

            cfg = "exec",

            allow_files = True,

            default = Label("//build/make/tools:java-event-log-tags"),

        ),

    },

)