nu-lint 1.3.0

Linter for Nu shell scripts that helpfully suggests improvements
Documentation 
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use nu_protocol::ast::ExternalArgument;

use super::{
    CommandEffects, ExternEffect,
    predicates::{always, has_flag},
};
use crate::{context::LintContext, effect::CommonEffect};

fn tar_modifies_fs(context: &LintContext, args: &[ExternalArgument]) -> bool {
    has_flag(
        args,
        context,
        &["-x", "--extract", "--get", "-c", "--create"],
    )
}

fn tar_has_streaming(context: &LintContext, args: &[ExternalArgument]) -> bool {
    has_flag(args, context, &["-v", "--verbose"])
}

pub const COMMANDS: &[CommandEffects] = &[
    (
        "tar",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, tar_modifies_fs),
            (ExternEffect::SlowStreamingOutput, tar_has_streaming),
        ],
    ),
    (
        "zip",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "unzip",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "gzip",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "gunzip",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "bzip2",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "bunzip2",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "xz",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "unxz",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "zstd",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "unzstd",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "7z",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "7za",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "rar",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
    (
        "unrar",
        &[
            (
                ExternEffect::CommonEffect(CommonEffect::FailsInNormalCircumstances),
                always,
            ),
            (ExternEffect::ModifiesFileSystem, always),
        ],
    ),
];