alint_rules/
file_max_size.rs

1//! `file_max_size` — files in scope must be at most `max_bytes` bytes.
2
3use alint_core::{Context, Error, Level, Result, Rule, RuleSpec, Scope, Violation};
4use serde::Deserialize;
5
6#[derive(Debug, Deserialize)]
7struct Options {
8    max_bytes: u64,
9}
10
11#[derive(Debug)]
12pub struct FileMaxSizeRule {
13    id: String,
14    level: Level,
15    policy_url: Option<String>,
16    message: Option<String>,
17    scope: Scope,
18    max_bytes: u64,
19}
20
21impl Rule for FileMaxSizeRule {
22    fn id(&self) -> &str {
23        &self.id
24    }
25    fn level(&self) -> Level {
26        self.level
27    }
28    fn policy_url(&self) -> Option<&str> {
29        self.policy_url.as_deref()
30    }
31
32    fn evaluate(&self, ctx: &Context<'_>) -> Result<Vec<Violation>> {
33        let mut violations = Vec::new();
34        for entry in ctx.index.files() {
35            if !self.scope.matches(&entry.path) {
36                continue;
37            }
38            if entry.size > self.max_bytes {
39                let msg = self.message.clone().unwrap_or_else(|| {
40                    format!(
41                        "file exceeds {} byte(s) (actual: {})",
42                        self.max_bytes, entry.size
43                    )
44                });
45                violations.push(Violation::new(msg).with_path(&entry.path));
46            }
47        }
48        Ok(violations)
49    }
50}
51
52pub fn build(spec: &RuleSpec) -> Result<Box<dyn Rule>> {
53    let Some(paths) = &spec.paths else {
54        return Err(Error::rule_config(
55            &spec.id,
56            "file_max_size requires a `paths` field",
57        ));
58    };
59    let opts: Options = spec
60        .deserialize_options()
61        .map_err(|e| Error::rule_config(&spec.id, format!("invalid options: {e}")))?;
62    Ok(Box::new(FileMaxSizeRule {
63        id: spec.id.clone(),
64        level: spec.level,
65        policy_url: spec.policy_url.clone(),
66        message: spec.message.clone(),
67        scope: Scope::from_paths_spec(paths)?,
68        max_bytes: opts.max_bytes,
69    }))
70}
alint_rules/file_max_size.rs

alint_rules/
file_max_size.rs
