load("@bazel_skylib//rules:diff_test.bzl", "diff_test")
load("@bazel_skylib//rules:write_file.bzl", "write_file")

# This list must be updated when we add a new command
# buildifier: keep sorted
_DOCS = [
    "aspect.md",
    "aspect_build.md",
    "aspect_clean.md",
    "aspect_docs.md",
    "aspect_info.md",
    "aspect_test.md",
    "aspect_version.md",
]

genrule(
    name = "docgen",
    outs = ["gen/" + d for d in _DOCS],
    cmd = "$(execpath //cmd/docgen) $(@D)/gen",
    tools = ["//cmd/docgen"],
)

# Help developers who get a red CI result by telling them how to fix it
_failure_message = "\nPlease update the docs by running\n    bazel run //docs:update"

[
    diff_test(
        name = "check_" + file,
        failure_message = _failure_message,
        file1 = "gen/" + file,
        file2 = file,
    )
    for file in _DOCS
]

write_file(
    name = "gen_update",
    out = "update.sh",
    content = [
        "#!/usr/bin/env bash",
        "cd $BUILD_WORKSPACE_DIRECTORY",
    ] + [
        "cp -fv bazel-bin/docs/gen/{0} docs/{0}".format(file)
        for file in _DOCS
    ],
)

sh_binary(
    name = "update",
    srcs = ["update.sh"],
    data = ["gen/" + d for d in _DOCS],
)