slopguard_core/rule/
mod.rs

1use std::collections::HashSet;
2use std::fmt;
3use std::fs::read_to_string;
4use std::io::Error as IoError;
5use std::path::{Component, Path, PathBuf};
6use std::str::{from_utf8, Utf8Error};
7
8use ast_grep_language::SupportLang;
9use ignore::WalkBuilder;
10use serde::{Deserialize, Serialize};
11use serde_yaml::Value;
12use slopguard_rules::BuiltinRules;
13use strum::{Display, EnumIter, EnumString};
14use thiserror::Error;
15
16use crate::cross_file::CrossFileKind;
17use crate::metric::Metric;
18use crate::resolution::ResolutionKind;
19use crate::source::{ResolvedSource, RuleOrigin};
20
21#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
22pub struct RuleId(pub String);
23
24impl fmt::Display for RuleId {
25    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
26        f.write_str(&self.0)
27    }
28}
29
30impl RuleId {
31    pub fn as_str(&self) -> &str {
32        &self.0
33    }
34}
35
36impl From<String> for RuleId {
37    fn from(s: String) -> Self {
38        Self(s)
39    }
40}
41
42impl From<&str> for RuleId {
43    fn from(s: &str) -> Self {
44        Self(s.to_string())
45    }
46}
47
48#[derive(Debug, Display, Clone, PartialEq, Eq, Serialize, Deserialize)]
49#[serde(rename_all = "lowercase")]
50#[strum(serialize_all = "lowercase")]
51pub enum Severity {
52    Error,
53    Warning,
54}
55
56#[derive(Debug, Display, EnumIter, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
57#[serde(rename_all = "lowercase")]
58#[strum(serialize_all = "lowercase")]
59pub enum Language {
60    Rust,
61    TypeScript,
62}
63
64impl Language {
65    /// The ast-grep languages a rule written for this language is compiled
66    /// against. TypeScript rules also cover TSX files.
67    pub fn ast_grep_langs(&self) -> &'static [SupportLang] {
68        match self {
69            Language::Rust => &[SupportLang::Rust],
70            Language::TypeScript => &[SupportLang::TypeScript, SupportLang::Tsx],
71        }
72    }
73}
74
75#[derive(Debug, Display, EnumString, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
76#[serde(rename_all = "lowercase")]
77#[strum(serialize_all = "lowercase")]
78pub enum Category {
79    Slop,
80    Security,
81    #[default]
82    Correctness,
83}
84
85impl Category {
86    /// Derive the category from the first directory of a rule path relative to
87    /// its ruleset root (e.g. `security/no-debug.yml`). Returns `None` when the
88    /// path has no directory or the directory is not a known category.
89    fn from_rule_path(path: &Path) -> Option<Self> {
90        match path.components().next()? {
91            Component::Normal(dir) => dir.to_str()?.parse().ok(),
92            _ => None,
93        }
94    }
95}
96
97/// One rewrite assertion for an autofixable rule: `slopguard test` applies the
98/// rule's `rewrite` to `before` and requires the result to equal `after`. This
99/// is what proves a `rewrite` is correct, alongside `should_match`.
100#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
101pub struct FixCase {
102    pub before: String,
103    pub after: String,
104}
105
106#[derive(Debug, Clone, Serialize, Deserialize)]
107pub struct RuleTests {
108    #[serde(default)]
109    pub should_match: Vec<String>,
110    #[serde(default)]
111    pub should_not_match: Vec<String>,
112    /// Rewrite assertions checked by `slopguard test` for autofixable rules.
113    /// Each case's `before` is rewritten with the rule's `rewrite` and must
114    /// equal `after`. Ignored for rules that are not autofixable.
115    #[serde(default)]
116    pub should_fix: Vec<FixCase>,
117    /// Whole-file fixtures for metric rules, resolved against the embedded
118    /// ruleset root (builtin rules) or the custom rule directory the rule was
119    /// loaded from. A metric cannot be measured on a snippet.
120    #[serde(default)]
121    pub should_match_files: Vec<String>,
122    #[serde(default)]
123    pub should_not_match_files: Vec<String>,
124}
125
126/// How the `reason` (the finding's `note`) is produced when an `ai_check` rule
127/// fires. See [`AiCheck::reason`].
128#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
129#[serde(rename_all = "lowercase")]
130#[strum(serialize_all = "lowercase")]
131pub enum ReasonMode {
132    /// Use the rule's static `note` as the reason. No generative LLM call.
133    #[default]
134    Static,
135    /// Escalate to the generative LLM to write a per-instance reason. Reserved
136    /// for relational rules whose message depends on the specific match.
137    Generated,
138}
139
140/// Optional AI confirmation step for a rule. When present, the rule's `rule`
141/// AST pattern acts as a cheap pre-filter: matches become candidates that an
142/// LLM (or the System One classifier) must confirm before they are reported.
143/// The AST layer never executes this field; the AI pipeline in `slopguard-ai`
144/// reads it.
145#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
146pub struct AiCheck {
147    /// Prompt template. Double use: the generative LLM prompt (variables
148    /// `{{code}}`, `{{filename}}`, `{{rule_context}}`), and the `instructions`
149    /// of the System One classifier's noul question.
150    pub prompt: String,
151    /// Model override for this rule. Falls back to `[ai].model` in config.
152    #[serde(default)]
153    pub model: Option<String>,
154    /// How the finding's reason is produced: a `static` note (default) or a
155    /// per-instance `generated` note written by the LLM.
156    #[serde(default)]
157    pub reason: ReasonMode,
158    /// Per-rule classifier probability threshold, overriding
159    /// `[ai.classifier].threshold`. Fires when `p >= threshold`.
160    #[serde(default)]
161    pub threshold: Option<f64>,
162    /// Classifier calibration: what a "yes" (issue) looks like. Maps to the
163    /// noul question's `criteria.true`.
164    #[serde(default)]
165    pub if_true: Option<String>,
166    /// Classifier calibration: what a "no" (not an issue) looks like. Maps to
167    /// the noul question's `criteria.false`.
168    #[serde(default)]
169    pub if_false: Option<String>,
170}
171
172fn default_enabled() -> bool {
173    true
174}
175
176#[derive(Debug, Clone, Serialize, Deserialize)]
177pub struct Rule {
178    pub id: RuleId,
179    pub language: Language,
180    pub severity: Severity,
181    pub message: String,
182    #[serde(default)]
183    pub note: Option<String>,
184    #[serde(default)]
185    pub category: Option<Category>,
186    #[serde(default)]
187    pub fix: Option<String>,
188    /// ast-grep rewrite (fix) template applied to this rule's match by
189    /// `scan --fix`. Distinct from `fix`, which is a free-text human message:
190    /// `rewrite` carries the replacement pattern (it may reference the rule's
191    /// metavariables). The AST detection pass never reads this field.
192    #[serde(default)]
193    pub rewrite: Option<String>,
194    /// Opt-in marker that this rule's `rewrite` is safe to apply automatically
195    /// (idempotent, no semantic change). `scan --fix` ignores the `rewrite` of
196    /// any rule without it. Defaults to `false`.
197    #[serde(default)]
198    pub autofix_safe: bool,
199    /// Matcher used only by `scan --fix` to locate nodes to rewrite, when it must
200    /// be narrower than the detection `rule` (detect broadly, fix narrowly). A
201    /// rule can flag every variant of a pattern while auto-rewriting only the
202    /// subset whose `rewrite` is provably safe. `null` (the default) means
203    /// `--fix` reuses `rule`. The detection pass never reads this field.
204    #[serde(default, skip_serializing_if = "Value::is_null")]
205    pub autofix_rule: Value,
206    #[serde(default)]
207    pub rule: Value,
208    /// ast-grep metavariable constraints, a sibling of `rule`. Passed through
209    /// verbatim so a rule can restrict a captured metavariable (e.g. bind the
210    /// receiver of `$R.clone()` to an already-owned value). `null` when unset.
211    #[serde(default, skip_serializing_if = "Value::is_null")]
212    pub constraints: Value,
213    /// File-level metric evaluated instead of `rule`. Mutually exclusive with it.
214    #[serde(default)]
215    pub metric: Option<Metric>,
216    /// The value `metric` must exceed for the rule to fire. Required with `metric`.
217    #[serde(default)]
218    pub threshold: Option<f64>,
219    /// Minimum file length in lines before a metric rule is evaluated. Below it
220    /// the file is skipped, so ratios are not distorted by tiny files (a small
221    /// module full of required doc comments). `None` means no floor.
222    #[serde(default)]
223    pub min_lines: Option<usize>,
224    /// Project-wide analysis evaluated instead of `rule` or `metric`, and
225    /// mutually exclusive with both. The kind selects builtin Rust logic; the
226    /// YAML only carries the rule's identity, severity and user-facing text.
227    #[serde(default)]
228    pub cross_file: Option<CrossFileKind>,
229    /// Per-file import resolution evaluated instead of `rule`, `metric` or
230    /// `cross_file`, and mutually exclusive with all three. The kind selects
231    /// builtin resolution logic; the YAML only carries the rule's identity,
232    /// severity and user-facing text. `$import` in `message` is replaced with
233    /// the unresolved specifier.
234    #[serde(default)]
235    pub resolution: Option<ResolutionKind>,
236    /// Directory a custom rule was loaded from, used to resolve test fixture
237    /// paths. `None` for builtin rules, which resolve against `BuiltinRules`.
238    #[serde(skip)]
239    pub source_dir: Option<PathBuf>,
240    /// Provenance of this rule (builtin, git source, or local path), stamped at
241    /// load time and reported by `slopguard list`. Never present in YAML.
242    #[serde(skip)]
243    pub origin: RuleOrigin,
244    #[serde(default)]
245    pub files: Option<Vec<String>>,
246    #[serde(default)]
247    pub ignores: Option<Vec<String>>,
248    /// Drop findings located inside `#[cfg(test)]` blocks of scanned Rust files.
249    /// Complements `ignores`, which only filters whole files by path.
250    #[serde(default = "default_enabled")]
251    pub enabled: bool,
252    #[serde(default)]
253    pub skip_test_code: bool,
254    #[serde(default)]
255    pub tests: Option<RuleTests>,
256    /// When set, matches of `rule` are candidates confirmed by an LLM before
257    /// being reported. See [`AiCheck`]. The AST scanner ignores this field.
258    #[serde(default)]
259    pub ai_check: Option<AiCheck>,
260}
261
262impl Rule {
263    /// The rule's category, resolving an unset category to the default
264    /// (`Correctness`), the way the scanner treats it.
265    pub fn effective_category(&self) -> Category {
266        self.category.clone().unwrap_or_default()
267    }
268
269    /// Whether this rule measures a file-level metric instead of matching AST.
270    pub fn is_metric(&self) -> bool {
271        self.metric.is_some()
272    }
273
274    /// The metric and threshold of a file-level rule, `None` for AST rules.
275    pub fn metric_spec(&self) -> Option<(Metric, f64)> {
276        Some((self.metric?, self.threshold?))
277    }
278
279    /// Whether this rule is evaluated by the project-wide pass instead of per file.
280    pub fn is_cross_file(&self) -> bool {
281        self.cross_file.is_some()
282    }
283
284    /// Whether this rule is evaluated by the per-file import resolution pass.
285    pub fn is_resolution(&self) -> bool {
286        self.resolution.is_some()
287    }
288
289    /// Whether `scan --fix` may rewrite this rule's matches: it carries a
290    /// `rewrite` template and is explicitly marked `autofix_safe`.
291    pub fn is_autofixable(&self) -> bool {
292        self.autofix_safe && self.rewrite.is_some()
293    }
294
295    /// The matcher `scan --fix` uses to find nodes to rewrite: the dedicated
296    /// `autofix_rule` when set, otherwise the detection `rule`.
297    pub fn fix_matcher(&self) -> &Value {
298        if self.autofix_rule.is_null() {
299            &self.rule
300        } else {
301            &self.autofix_rule
302        }
303    }
304
305    /// The cross-file analysis this rule requests, `None` for AST and metric rules.
306    // Read-only accessor for a private field.
307    // slopguard-disable-next-line no-trivial-function
308    pub fn cross_file_kind(&self) -> Option<CrossFileKind> {
309        self.cross_file
310    }
311
312    /// The resolution analysis this rule requests, `None` for all other rules.
313    // Read-only accessor for a private field.
314    // slopguard-disable-next-line no-trivial-function
315    pub fn resolution_kind(&self) -> Option<ResolutionKind> {
316        self.resolution
317    }
318}
319
320#[derive(Debug, Error)]
321pub enum RuleError {
322    #[error("failed to parse rule YAML: {0}")]
323    Parse(#[from] serde_yaml::Error),
324
325    #[error("rule '{id}': rule field must not be empty")]
326    EmptyRule { id: RuleId },
327
328    #[error("rule '{id}': 'metric' and 'rule' are mutually exclusive")]
329    MetricAndRule { id: RuleId },
330
331    #[error("rule '{id}': 'cross_file' and 'rule' are mutually exclusive")]
332    CrossFileAndRule { id: RuleId },
333
334    #[error("rule '{id}': 'cross_file' and 'metric' are mutually exclusive")]
335    CrossFileAndMetric { id: RuleId },
336
337    #[error("rule '{id}': 'resolution' and 'rule' are mutually exclusive")]
338    ResolutionAndRule { id: RuleId },
339
340    #[error("rule '{id}': 'resolution' and 'metric' are mutually exclusive")]
341    ResolutionAndMetric { id: RuleId },
342
343    #[error("rule '{id}': 'resolution' and 'cross_file' are mutually exclusive")]
344    ResolutionAndCrossFile { id: RuleId },
345
346    #[error("rule '{id}': a metric rule requires a 'threshold'")]
347    MissingThreshold { id: RuleId },
348
349    #[error("rule '{id}': test fixture files are only supported for metric rules")]
350    FixturesOnAstRule { id: RuleId },
351
352    #[error("rule '{id}': fixture path '{path}' must be relative and must not contain '..'")]
353    InvalidFixturePath { id: RuleId, path: String },
354
355    #[error("rule '{id}': fixture '{path}' not found")]
356    FixtureNotFound { id: RuleId, path: String },
357
358    #[error("duplicate rule id: '{id}'")]
359    DuplicateId { id: RuleId },
360
361    #[error("rule '{id}' from source '{origin}' reuses a builtin rule id; rename it (external sources may not shadow builtin rules)")]
362    SourceReusesBuiltinId { id: RuleId, origin: String },
363
364    #[error("failed to read rule file '{path}': {source}")]
365    Io {
366        path: String,
367        #[source]
368        source: IoError,
369    },
370
371    #[error("rule file '{path}' is not valid UTF-8: {source}")]
372    Utf8 {
373        path: String,
374        #[source]
375        source: Utf8Error,
376    },
377}
378
379impl RuleError {
380    fn io(path: &Path, source: IoError) -> Self {
381        Self::Io {
382            path: path.display().to_string(),
383            source,
384        }
385    }
386}
387
388/// Parse a single YAML string into a Rule, validating required fields.
389///
390/// A rule carries exactly one matcher: an ast-grep `rule`, a file-level
391/// `metric` plus its `threshold`, or a project-wide `cross_file` kind.
392pub fn parse_rule(yaml: &str) -> Result<Rule, RuleError> {
393    let rule: Rule = serde_yaml::from_str(yaml)?;
394    let has_rule = !rule.rule.is_null();
395    let has_metric = rule.metric.is_some();
396    let has_cross = rule.cross_file.is_some();
397    let has_resolution = rule.resolution.is_some();
398    if has_resolution {
399        if has_rule {
400            return Err(RuleError::ResolutionAndRule { id: rule.id });
401        }
402        if has_metric {
403            return Err(RuleError::ResolutionAndMetric { id: rule.id });
404        }
405        if has_cross {
406            return Err(RuleError::ResolutionAndCrossFile { id: rule.id });
407        }
408    }
409    match (has_cross, has_metric, has_rule) {
410        (true, _, true) => return Err(RuleError::CrossFileAndRule { id: rule.id }),
411        (true, true, _) => return Err(RuleError::CrossFileAndMetric { id: rule.id }),
412        (false, true, true) => return Err(RuleError::MetricAndRule { id: rule.id }),
413        (false, true, false) if rule.threshold.is_none() => {
414            return Err(RuleError::MissingThreshold { id: rule.id })
415        }
416        (false, false, false) if !has_resolution => {
417            return Err(RuleError::EmptyRule { id: rule.id })
418        }
419        _ => {}
420    }
421    if !rule.is_metric() {
422        if let Some(tests) = &rule.tests {
423            if !tests.should_match_files.is_empty() || !tests.should_not_match_files.is_empty() {
424                return Err(RuleError::FixturesOnAstRule { id: rule.id });
425            }
426        }
427    }
428    Ok(rule)
429}
430
431/// Read a whole-file test fixture referenced by `tests.should_match_files` or
432/// `tests.should_not_match_files`. Builtin rules resolve against the embedded
433/// ruleset; custom rules resolve against the directory they were loaded from.
434pub fn read_fixture(rule: &Rule, relative: &str) -> Result<String, RuleError> {
435    let path = Path::new(relative);
436    let traverses = path.components().any(|c| matches!(c, Component::ParentDir));
437    if path.is_absolute() || traverses {
438        return Err(RuleError::InvalidFixturePath {
439            id: rule.id.clone(),
440            path: relative.to_string(),
441        });
442    }
443
444    match &rule.source_dir {
445        Some(dir) => {
446            let full = dir.join(path);
447            read_to_string(&full).map_err(|e| {
448                if e.kind() == std::io::ErrorKind::NotFound {
449                    RuleError::FixtureNotFound {
450                        id: rule.id.clone(),
451                        path: relative.to_string(),
452                    }
453                } else {
454                    RuleError::io(&full, e)
455                }
456            })
457        }
458        None => {
459            let file = BuiltinRules::get(relative).ok_or_else(|| RuleError::FixtureNotFound {
460                id: rule.id.clone(),
461                path: relative.to_string(),
462            })?;
463            from_utf8(&file.data)
464                .map(str::to_string)
465                .map_err(|e| RuleError::Utf8 {
466                    path: relative.to_string(),
467                    source: e,
468                })
469        }
470    }
471}
472
473/// Parse a rule and fill in its category from the ruleset-relative path when
474/// the YAML omits it.
475fn parse_rule_at(yaml: &str, relative_path: &Path) -> Result<Rule, RuleError> {
476    let mut rule = parse_rule(yaml)?;
477    if rule.category.is_none() {
478        rule.category = Category::from_rule_path(relative_path);
479    }
480    Ok(rule)
481}
482
483fn is_rule_file(path: &Path) -> bool {
484    matches!(
485        path.extension().and_then(|e| e.to_str()),
486        Some("yml" | "yaml")
487    )
488}
489
490/// Load all builtin rules embedded via rust-embed.
491pub fn load_builtin_rules() -> Result<Vec<Rule>, RuleError> {
492    BuiltinRules::iter()
493        .filter(|path| is_rule_file(Path::new(path.as_ref())))
494        .filter_map(|path| BuiltinRules::get(&path).map(|file| (path, file)))
495        .map(|(path, file)| {
496            let yaml = from_utf8(&file.data).map_err(|e| RuleError::Utf8 {
497                path: path.to_string(),
498                source: e,
499            })?;
500            parse_rule_at(yaml, Path::new(path.as_ref()))
501        })
502        .collect()
503}
504
505/// Load every rule YAML found under `dir`, stamping each with `dir` as its
506/// fixture root and `origin` as its provenance. Subdirectories are searched
507/// recursively.
508fn load_rules_in_dir(dir: &Path, origin: &RuleOrigin) -> Result<Vec<Rule>, RuleError> {
509    let mut rules = Vec::new();
510    // Rule directories are plain file trees: gitignore and hidden-file
511    // filtering would silently drop rules.
512    for entry in WalkBuilder::new(dir).standard_filters(false).build() {
513        let entry = entry.map_err(|e| RuleError::io(dir, IoError::other(e)))?;
514        let path = entry.path();
515        let is_file = entry.file_type().is_some_and(|t| t.is_file());
516        if !is_file || !is_rule_file(path) {
517            continue;
518        }
519        let yaml = read_to_string(path).map_err(|e| RuleError::io(path, e))?;
520        let relative = path.strip_prefix(dir).unwrap_or(path);
521        let mut rule = parse_rule_at(&yaml, relative)?;
522        rule.source_dir = Some(dir.to_path_buf());
523        rule.origin = origin.clone();
524        rules.push(rule);
525    }
526    Ok(rules)
527}
528
529/// Load rules from custom directories on the filesystem. Missing directories
530/// are skipped; subdirectories are searched recursively.
531pub fn load_custom_rules(dirs: &[PathBuf]) -> Result<Vec<Rule>, RuleError> {
532    let mut rules = Vec::new();
533    for dir in dirs.iter().filter(|dir| dir.is_dir()) {
534        let origin = RuleOrigin::Local { path: dir.clone() };
535        rules.extend(load_rules_in_dir(dir, &origin)?);
536    }
537    Ok(rules)
538}
539
540/// Load rules from resolved external sources (git clones and local paths),
541/// stamping each rule with the source's provenance. A source directory that is
542/// missing (e.g. a git `path` sub-directory that does not exist) is skipped.
543pub fn load_source_rules(sources: &[ResolvedSource]) -> Result<Vec<Rule>, RuleError> {
544    let mut rules = Vec::new();
545    for source in sources.iter().filter(|s| s.dir.is_dir()) {
546        rules.extend(load_rules_in_dir(&source.dir, &source.origin)?);
547    }
548    Ok(rules)
549}
550
551/// Reject any external rule whose (id, language) collides with a builtin rule.
552/// External sources extend the ruleset; they must never shadow a builtin id.
553fn reject_builtin_id_reuse(external: &[Rule], builtin: &[Rule]) -> Result<(), RuleError> {
554    let builtin_ids: HashSet<(&RuleId, &Language)> =
555        builtin.iter().map(|r| (&r.id, &r.language)).collect();
556    for rule in external {
557        if builtin_ids.contains(&(&rule.id, &rule.language)) {
558            return Err(RuleError::SourceReusesBuiltinId {
559                id: rule.id.clone(),
560                origin: rule.origin.label(),
561            });
562        }
563    }
564    Ok(())
565}
566
567/// Whether a builtin rule takes part in a scan under `config`.
568///
569/// A rule listed in `rules.enable` is always active. Otherwise it must be
570/// enabled by default, belong to an active ruleset, and not be listed in
571/// `rules.disable`.
572pub fn is_rule_active(rule: &Rule, config: &crate::config::Config) -> bool {
573    let listed = |ids: &[String]| ids.iter().any(|id| id == rule.id.as_str());
574    if listed(&config.rules.enable) {
575        return true;
576    }
577    let ruleset_on = match rule.effective_category() {
578        Category::Slop => config.rulesets.slop,
579        Category::Security => config.rulesets.security,
580        Category::Correctness => config.rulesets.correctness,
581    };
582    ruleset_on && rule.enabled && !listed(&config.rules.disable)
583}
584
585/// Load the non-builtin rules (custom directories + external sources) and
586/// reject any external rule that reuses a builtin id. Custom rules come first,
587/// then source rules, matching the order both public loaders expose.
588fn load_external_rules(
589    config: &crate::config::Config,
590    sources: &[ResolvedSource],
591    builtin: &[Rule],
592) -> Result<Vec<Rule>, RuleError> {
593    let source_rules = load_source_rules(sources)?;
594    reject_builtin_id_reuse(&source_rules, builtin)?;
595
596    let mut external = load_custom_rules(&config.rules.custom_dirs)?;
597    external.extend(source_rules);
598    Ok(external)
599}
600
601/// Load all effective rules based on config: builtin (filtered by rulesets and
602/// the enable/disable lists), custom rules from configured directories, and
603/// rules from resolved external sources. An external rule reusing a builtin id
604/// is rejected before any filtering.
605pub fn load_effective_rules(
606    config: &crate::config::Config,
607    sources: &[ResolvedSource],
608) -> Result<Vec<Rule>, RuleError> {
609    let builtin = load_builtin_rules()?;
610    let external = load_external_rules(config, sources, &builtin)?;
611
612    let mut rules: Vec<Rule> = builtin
613        .into_iter()
614        .filter(|rule| is_rule_active(rule, config))
615        .collect();
616    rules.extend(external);
617    validate_unique_ids(&rules)?;
618    Ok(rules)
619}
620
621/// Load all rules (builtin + custom + external sources) without filtering by
622/// activation status. Used by `explain` to look up any rule regardless of
623/// config.
624pub fn load_all_rules(
625    config: &crate::config::Config,
626    sources: &[ResolvedSource],
627) -> Result<Vec<Rule>, RuleError> {
628    let builtin = load_builtin_rules()?;
629    let external = load_external_rules(config, sources, &builtin)?;
630
631    let mut rules = builtin;
632    rules.extend(external);
633    Ok(rules)
634}
635
636/// Validate that all rule (id, language) pairs are unique. The same rule id
637/// may appear for different languages (e.g. `no-todo-fixme` for both Rust and
638/// TypeScript), so a single `rules.disable` entry covers both variants.
639pub fn validate_unique_ids(rules: &[Rule]) -> Result<(), RuleError> {
640    let mut seen = HashSet::new();
641    for rule in rules {
642        if !seen.insert((&rule.id, &rule.language)) {
643            return Err(RuleError::DuplicateId {
644                id: rule.id.clone(),
645            });
646        }
647    }
648    Ok(())
649}
650
651#[cfg(test)]
652mod load_tests;
653#[cfg(test)]
654mod parse_tests;
slopguard_core/rule/mod.rs

slopguard_core/rule/
mod.rs
