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-rw-r--r--lib/src/lints.rs1
-rw-r--r--lib/src/lints/deprecated_to_path.rs59
2 files changed, 60 insertions, 0 deletions
diff --git a/lib/src/lints.rs b/lib/src/lints.rs
index d31a754..439fd8f 100644
--- a/lib/src/lints.rs
+++ b/lib/src/lints.rs
@@ -17,4 +17,5 @@ lints! {
17 empty_inherit, 17 empty_inherit,
18 faster_groupby, 18 faster_groupby,
19 faster_zipattrswith, 19 faster_zipattrswith,
20 deprecated_to_path,
20} 21}
diff --git a/lib/src/lints/deprecated_to_path.rs b/lib/src/lints/deprecated_to_path.rs
new file mode 100644
index 0000000..36cbe35
--- /dev/null
+++ b/lib/src/lints/deprecated_to_path.rs
@@ -0,0 +1,59 @@
1use crate::{session::SessionInfo, Metadata, Report, Rule};
2
3use if_chain::if_chain;
4use macros::lint;
5use rnix::{
6 types::{Apply, TypedNode},
7 NodeOrToken, SyntaxElement, SyntaxKind,
8};
9
10/// ## What it does
11/// Checks for usage of the `toPath` function.
12///
13/// ## Why is this bad?
14/// `toPath` is deprecated.
15///
16/// ## Example
17///
18/// ```nix
19/// builtins.toPath "/path"
20/// ```
21///
22/// Try these instead:
23///
24/// ```nix
25/// # to convert the string to an absolute path:
26/// /. + "/path"
27/// # => /abc
28///
29/// # to convert the string to a path relative to the current directory:
30/// ./. + "/bin"
31/// # => /home/np/statix/bin
32/// ```
33#[lint(
34 name = "deprecated_to_path",
35 note = "Found usage of deprecated builtin toPath",
36 code = 17,
37 match_with = SyntaxKind::NODE_APPLY
38)]
39struct DeprecatedIsNull;
40
41static ALLOWED_PATHS: &[&str; 2] = &["builtins.toPath", "toPath"];
42
43impl Rule for DeprecatedIsNull {
44 fn validate(&self, node: &SyntaxElement, _sess: &SessionInfo) -> Option<Report> {
45 if_chain! {
46 if let NodeOrToken::Node(node) = node;
47 if let Some(apply) = Apply::cast(node.clone());
48 let lambda_path = apply.lambda()?.to_string();
49 if ALLOWED_PATHS.iter().any(|&p| p == lambda_path.as_str());
50 then {
51 let at = node.text_range();
52 let message = format!("`{}` is deprecated, see `:doc builtins.toPath` within the REPL for more", lambda_path);
53 Some(self.report().diagnostic(at, message))
54 } else {
55 None
56 }
57 }
58 }
59}