providers.cquery

"""Crude pretty-printer for providers and output groups.                                                                            [0/1844]

    $ bazel cquery --output=starlark --starlark:file=providers.cquery //path/to:target

    # Evaluate it again with each change to this file
    # https://github.com/eradman/entr
    $ echo "output_groups.cquery" \
        | entr \
        bazel cquery --output=starlark --starlark:file=providers.cquery //path/to:target
"""


LIST_SEP = "   - "
LINE_SEP = "\n" + LIST_SEP
_SEP = "\n   "

def mapPath(x):
    if x == None:
        return "None"
    else:
        return x.path

def header(x):
    return "\n\n" + x + ":\n"


def format(target):
    _providers = providers(target)
    output = _providers.get("OutputGroupInfo")

    __providers = LIST_SEP + LINE_SEP.join(_providers.keys())

    _output_groups = LIST_SEP + LINE_SEP.join(dir(output))

    res = "\n".join(["providers:", __providers, "", "output_groups:", _output_groups])

    key = 'FileProvider'
    if key in _providers:
        val = _providers[key]

        res += header(key)
        joined = LINE_SEP.join([f.path for f in val.files_to_build.to_list()])
        res += (LIST_SEP + joined) if joined else "\n"

    key = 'FilesToRunProvider'
    if key in _providers:
        val = _providers[key]

        res += header(key)
        res += "{sep}{a}\n{sep}{b}\n".format(
            sep = LIST_SEP,
            a = mapPath(val.executable),
            b = mapPath(val.runfiles_manifest)
        )

    # NB: You may iterate over all output groups and print them here. I just check default.
    group = "default"
    if group in output:
        res += header("OutputGroupInfo " + group)
        res += ", ".join([f.path for f in output[group].to_list()])
        res += "\n"

    key = 'ToolchainInfo'
    if key in _providers:
        val = _providers[key]
        res += header(key)
        res += LINE_SEP + "info.tool: " + val.info.tool.path

    return res