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authorAkshay <[email protected]>2021-10-02 09:09:11 +0100
committerAkshay <[email protected]>2021-10-02 09:09:39 +0100
commitc00900120d88c3d42666ed93716b821bd694e8d6 (patch)
treec98bc6fb91ce886e2ea1e0506209477d0f1100ea /lib
parent088559eedd40b16fff2ce97e48006580be39dd03 (diff)
new lint: manual_inherit
Diffstat (limited to 'lib')
-rw-r--r--lib/src/lints.rs1
-rw-r--r--lib/src/lints/empty_let_in.rs3
-rw-r--r--lib/src/lints/manual_inherit.rs43
-rw-r--r--lib/src/make.rs15
4 files changed, 58 insertions, 4 deletions
diff --git a/lib/src/lints.rs b/lib/src/lints.rs
index a5fe0da..7d5cd30 100644
--- a/lib/src/lints.rs
+++ b/lib/src/lints.rs
@@ -3,4 +3,5 @@ use crate::lint_map;
3lint_map! { 3lint_map! {
4 bool_comparison, 4 bool_comparison,
5 empty_let_in, 5 empty_let_in,
6 manual_inherit,
6} 7}
diff --git a/lib/src/lints/empty_let_in.rs b/lib/src/lints/empty_let_in.rs
index 4b074e7..207d253 100644
--- a/lib/src/lints/empty_let_in.rs
+++ b/lib/src/lints/empty_let_in.rs
@@ -3,8 +3,7 @@ use crate::{Lint, Metadata, Report, Rule, Suggestion};
3use if_chain::if_chain; 3use if_chain::if_chain;
4use macros::lint; 4use macros::lint;
5use rnix::{ 5use rnix::{
6 types::{LetIn, TypedNode, 6 types::{LetIn, TypedNode, EntryHolder},
7 EntryHolder},
8 NodeOrToken, SyntaxElement, SyntaxKind, 7 NodeOrToken, SyntaxElement, SyntaxKind,
9}; 8};
10 9
diff --git a/lib/src/lints/manual_inherit.rs b/lib/src/lints/manual_inherit.rs
new file mode 100644
index 0000000..2f8367f
--- /dev/null
+++ b/lib/src/lints/manual_inherit.rs
@@ -0,0 +1,43 @@
1use crate::{make, Lint, Metadata, Report, Rule, Suggestion};
2
3use if_chain::if_chain;
4use macros::lint;
5use rnix::{
6 types::{KeyValue, Ident, TypedNode, TokenWrapper},
7 NodeOrToken, SyntaxElement, SyntaxKind,
8};
9
10#[lint(
11 name = "manual inherit",
12 note = "Assignment instead of `inherit` keyword",
13 code = 3,
14 match_with = SyntaxKind::NODE_KEY_VALUE
15)]
16struct ManualInherit;
17
18impl Rule for ManualInherit {
19 fn validate(&self, node: &SyntaxElement) -> Option<Report> {
20 if_chain! {
21 if let NodeOrToken::Node(key_value_node) = node;
22 if let Some(key_value_stmt) = KeyValue::cast(key_value_node.clone());
23 if let Some(key_path) = key_value_stmt.key();
24 if let Some(key_node) = key_path.path().next();
25 if let Some(key) = Ident::cast(key_node);
26
27 if let Some(value_node) = key_value_stmt.value();
28 if let Some(value) = Ident::cast(value_node);
29
30 if key.as_str() == value.as_str();
31
32 then {
33 let at = node.text_range();
34 let replacement = make::inherit_stmt(&[key]).node().clone();
35 let message = format!("The assignment `{}` is better written with `inherit`", node);
36 Some(Self::report().suggest(at, message, Suggestion::new(at, replacement)))
37 } else {
38 None
39 }
40 }
41 }
42}
43
diff --git a/lib/src/make.rs b/lib/src/make.rs
index 0b21105..facd247 100644
--- a/lib/src/make.rs
+++ b/lib/src/make.rs
@@ -1,11 +1,13 @@
1use rnix::{SyntaxNode, types::{TypedNode, self}}; 1use std::iter::IntoIterator;
2
3use rnix::{SyntaxNode, types::{TypedNode, self, TokenWrapper}};
2 4
3fn ast_from_text<N: TypedNode>(text: &str) -> N { 5fn ast_from_text<N: TypedNode>(text: &str) -> N {
4 let parse = rnix::parse(text); 6 let parse = rnix::parse(text);
5 let node = match parse.node().descendants().find_map(N::cast) { 7 let node = match parse.node().descendants().find_map(N::cast) {
6 Some(it) => it, 8 Some(it) => it,
7 None => { 9 None => {
8 panic!("Failed to make ast node `{}` from text {}", std::any::type_name::<N>(), text) 10 panic!("Failed to make ast node `{}` from text `{}`", std::any::type_name::<N>(), text)
9 } 11 }
10 }; 12 };
11 node 13 node
@@ -18,3 +20,12 @@ pub fn parenthesize(node: &SyntaxNode) -> types::Paren {
18pub fn unary_not(node: &SyntaxNode) -> types::UnaryOp { 20pub fn unary_not(node: &SyntaxNode) -> types::UnaryOp {
19 ast_from_text(&format!("!{}", node)) 21 ast_from_text(&format!("!{}", node))
20} 22}
23
24pub fn inherit_stmt<'a>(nodes: impl IntoIterator<Item = &'a types::Ident>) -> types::Inherit {
25 let inherited_idents = nodes
26 .into_iter()
27 .map(|i| i.as_str().to_owned())
28 .collect::<Vec<_>>()
29 .join(" ");
30 ast_from_text(&format!("{{ inherit {}; }}", inherited_idents))
31}