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use crate::{session::SessionInfo, Metadata, Report, Rule};
use if_chain::if_chain;
use macros::lint;
use rnix::{
types::{Apply, TypedNode},
NodeOrToken, SyntaxElement, SyntaxKind,
};
/// ## What it does
/// Checks for usage of the `toPath` function.
///
/// ## Why is this bad?
/// `toPath` is deprecated.
///
/// ## Example
///
/// ```nix
/// builtins.toPath "/path"
/// ```
///
/// Try these instead:
///
/// ```nix
/// # to convert the string to an absolute path:
/// /. + "/path"
/// # => /abc
///
/// # to convert the string to a path relative to the current directory:
/// ./. + "/bin"
/// # => /home/np/statix/bin
/// ```
#[lint(
name = "deprecated_to_path",
note = "Found usage of deprecated builtin toPath",
code = 17,
match_with = SyntaxKind::NODE_APPLY
)]
struct DeprecatedIsNull;
static ALLOWED_PATHS: &[&str; 2] = &["builtins.toPath", "toPath"];
impl Rule for DeprecatedIsNull {
fn validate(&self, node: &SyntaxElement, _sess: &SessionInfo) -> Option<Report> {
if_chain! {
if let NodeOrToken::Node(node) = node;
if let Some(apply) = Apply::cast(node.clone());
let lambda_path = apply.lambda()?.to_string();
if ALLOWED_PATHS.iter().any(|&p| p == lambda_path.as_str());
then {
let at = node.text_range();
let message = format!("`{}` is deprecated, see `:doc builtins.toPath` within the REPL for more", lambda_path);
Some(self.report().diagnostic(at, message))
} else {
None
}
}
}
}
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