fallow_config/workspace/
package_json.rs

1use serde::{Deserialize, Serialize};
2
3/// Type alias for standard `HashMap` used in serde-deserialized structs.
4/// `rustc-hash` v2 does not have a `serde` feature, so fields deserialized
5/// from JSON must use `std::collections::HashMap`.
6#[expect(
7    clippy::disallowed_types,
8    reason = "rustc-hash v2 lacks serde feature — JSON deserialization needs std HashMap"
9)]
10type StdHashMap<K, V> = std::collections::HashMap<K, V>;
11
12/// Parsed package.json with fields relevant to fallow.
13#[derive(Debug, Clone, Default, Deserialize, Serialize)]
14pub struct PackageJson {
15    #[serde(default)]
16    pub name: Option<String>,
17    #[serde(default)]
18    pub main: Option<String>,
19    #[serde(default)]
20    pub module: Option<String>,
21    #[serde(default)]
22    pub types: Option<String>,
23    #[serde(default)]
24    pub typings: Option<String>,
25    #[serde(default)]
26    pub source: Option<String>,
27    #[serde(default)]
28    pub browser: Option<serde_json::Value>,
29    #[serde(default)]
30    pub bin: Option<serde_json::Value>,
31    #[serde(default)]
32    pub exports: Option<serde_json::Value>,
33    #[serde(default)]
34    pub dependencies: Option<StdHashMap<String, String>>,
35    #[serde(default, rename = "devDependencies")]
36    pub dev_dependencies: Option<StdHashMap<String, String>>,
37    #[serde(default, rename = "peerDependencies")]
38    pub peer_dependencies: Option<StdHashMap<String, String>>,
39    #[serde(default, rename = "optionalDependencies")]
40    pub optional_dependencies: Option<StdHashMap<String, String>>,
41    #[serde(default)]
42    pub scripts: Option<StdHashMap<String, String>>,
43    #[serde(default)]
44    pub workspaces: Option<serde_json::Value>,
45}
46
47impl PackageJson {
48    /// Load from a package.json file.
49    ///
50    /// # Errors
51    ///
52    /// Returns an error string when the file cannot be read or parsed as JSON.
53    pub fn load(path: &std::path::Path) -> Result<Self, String> {
54        let content = std::fs::read_to_string(path)
55            .map_err(|e| format!("Failed to read {}: {}", path.display(), e))?;
56        serde_json::from_str(&content)
57            .map_err(|e| format!("Failed to parse {}: {}", path.display(), e))
58    }
59
60    /// Get all dependency names (production + dev + peer + optional).
61    #[must_use]
62    pub fn all_dependency_names(&self) -> Vec<String> {
63        let mut deps = Vec::new();
64        if let Some(d) = &self.dependencies {
65            deps.extend(d.keys().cloned());
66        }
67        if let Some(d) = &self.dev_dependencies {
68            deps.extend(d.keys().cloned());
69        }
70        if let Some(d) = &self.peer_dependencies {
71            deps.extend(d.keys().cloned());
72        }
73        if let Some(d) = &self.optional_dependencies {
74            deps.extend(d.keys().cloned());
75        }
76        deps
77    }
78
79    /// Get production dependency names only.
80    #[must_use]
81    pub fn production_dependency_names(&self) -> Vec<String> {
82        self.dependencies
83            .as_ref()
84            .map(|d| d.keys().cloned().collect())
85            .unwrap_or_default()
86    }
87
88    /// Get dev dependency names only.
89    #[must_use]
90    pub fn dev_dependency_names(&self) -> Vec<String> {
91        self.dev_dependencies
92            .as_ref()
93            .map(|d| d.keys().cloned().collect())
94            .unwrap_or_default()
95    }
96
97    /// Get optional dependency names only.
98    #[must_use]
99    pub fn optional_dependency_names(&self) -> Vec<String> {
100        self.optional_dependencies
101            .as_ref()
102            .map(|d| d.keys().cloned().collect())
103            .unwrap_or_default()
104    }
105
106    /// Extract entry points from package.json fields.
107    #[must_use]
108    pub fn entry_points(&self) -> Vec<String> {
109        let mut entries = Vec::new();
110
111        if let Some(main) = &self.main {
112            entries.push(main.clone());
113        }
114        if let Some(module) = &self.module {
115            entries.push(module.clone());
116        }
117        if let Some(types) = &self.types {
118            entries.push(types.clone());
119        }
120        if let Some(typings) = &self.typings {
121            entries.push(typings.clone());
122        }
123        if let Some(source) = &self.source {
124            entries.push(source.clone());
125        }
126
127        // Handle browser field (string or object with path values)
128        if let Some(browser) = &self.browser {
129            match browser {
130                serde_json::Value::String(s) => entries.push(s.clone()),
131                serde_json::Value::Object(map) => {
132                    for v in map.values() {
133                        if let serde_json::Value::String(s) = v
134                            && (s.starts_with("./") || s.starts_with("../"))
135                        {
136                            entries.push(s.clone());
137                        }
138                    }
139                }
140                _ => {}
141            }
142        }
143
144        // Handle bin field (string or object)
145        if let Some(bin) = &self.bin {
146            match bin {
147                serde_json::Value::String(s) => entries.push(s.clone()),
148                serde_json::Value::Object(map) => {
149                    for v in map.values() {
150                        if let serde_json::Value::String(s) = v {
151                            entries.push(s.clone());
152                        }
153                    }
154                }
155                _ => {}
156            }
157        }
158
159        // Handle exports field (recursive)
160        if let Some(exports) = &self.exports {
161            extract_exports_entries(exports, &mut entries);
162        }
163
164        entries
165    }
166
167    /// Extract unique subdirectory names referenced by the `exports` field keys.
168    ///
169    /// For exports like `"./compat": { ... }`, `"./hooks/client": { ... }`,
170    /// this returns `["compat", "hooks"]`. Used to discover sub-packages in
171    /// projects that define their internal package structure via the exports map
172    /// (e.g., preact with `compat/`, `hooks/`, `debug/` sub-packages).
173    #[must_use]
174    pub fn exports_subdirectories(&self) -> Vec<String> {
175        self.exports
176            .as_ref()
177            .map_or_else(Vec::new, extract_exports_subdirectories)
178    }
179
180    /// Extract workspace patterns from package.json.
181    #[must_use]
182    pub fn workspace_patterns(&self) -> Vec<String> {
183        match &self.workspaces {
184            Some(serde_json::Value::Array(arr)) => arr
185                .iter()
186                .filter_map(|v| v.as_str().map(String::from))
187                .collect(),
188            Some(serde_json::Value::Object(obj)) => obj
189                .get("packages")
190                .and_then(|v| v.as_array())
191                .map(|arr| {
192                    arr.iter()
193                        .filter_map(|v| v.as_str().map(String::from))
194                        .collect()
195                })
196                .unwrap_or_default(),
197            _ => Vec::new(),
198        }
199    }
200}
201
202/// Extract unique subdirectory names referenced by the `exports` field keys.
203///
204/// For exports like `"./compat": { ... }`, `"./hooks/client": { ... }`,
205/// this returns `["compat", "hooks"]`. Used to discover sub-packages in
206/// projects that use the exports map to define their internal package structure
207/// (e.g., preact with `compat/`, `hooks/`, `debug/` sub-packages).
208fn extract_exports_subdirectories(exports: &serde_json::Value) -> Vec<String> {
209    let Some(map) = exports.as_object() else {
210        return Vec::new();
211    };
212
213    let skip_dirs = ["dist", "build", "out", "esm", "cjs", "lib", "node_modules"];
214    let mut dirs = rustc_hash::FxHashSet::default();
215
216    for key in map.keys() {
217        // Keys are like "./compat", "./hooks/client", "."
218        let stripped = key.strip_prefix("./").unwrap_or(key);
219        if let Some(first_segment) = stripped.split('/').next()
220            && !first_segment.is_empty()
221            && first_segment != "."
222            && first_segment != "package.json"
223            && !skip_dirs.contains(&first_segment)
224        {
225            dirs.insert(first_segment.to_owned());
226        }
227    }
228
229    dirs.into_iter().collect()
230}
231
232/// Recursively extract file paths from package.json exports field.
233fn extract_exports_entries(value: &serde_json::Value, entries: &mut Vec<String>) {
234    match value {
235        serde_json::Value::String(s) if s.starts_with("./") || s.starts_with("../") => {
236            entries.push(s.clone());
237        }
238        serde_json::Value::Object(map) => {
239            for v in map.values() {
240                extract_exports_entries(v, entries);
241            }
242        }
243        serde_json::Value::Array(arr) => {
244            for v in arr {
245                extract_exports_entries(v, entries);
246            }
247        }
248        _ => {}
249    }
250}
251
252#[cfg(test)]
253mod tests {
254    use super::*;
255
256    #[test]
257    fn package_json_workspace_patterns_array() {
258        let pkg: PackageJson =
259            serde_json::from_str(r#"{"workspaces": ["packages/*", "apps/*"]}"#).unwrap();
260        let patterns = pkg.workspace_patterns();
261        assert_eq!(patterns, vec!["packages/*", "apps/*"]);
262    }
263
264    #[test]
265    fn package_json_workspace_patterns_object() {
266        let pkg: PackageJson =
267            serde_json::from_str(r#"{"workspaces": {"packages": ["packages/*"]}}"#).unwrap();
268        let patterns = pkg.workspace_patterns();
269        assert_eq!(patterns, vec!["packages/*"]);
270    }
271
272    #[test]
273    fn package_json_workspace_patterns_none() {
274        let pkg: PackageJson = serde_json::from_str(r#"{"name": "test"}"#).unwrap();
275        let patterns = pkg.workspace_patterns();
276        assert!(patterns.is_empty());
277    }
278
279    #[test]
280    fn package_json_workspace_patterns_empty_array() {
281        let pkg: PackageJson = serde_json::from_str(r#"{"workspaces": []}"#).unwrap();
282        let patterns = pkg.workspace_patterns();
283        assert!(patterns.is_empty());
284    }
285
286    #[test]
287    fn package_json_load_valid() {
288        let temp_dir = std::env::temp_dir().join("fallow-test-pkg-json");
289        let _ = std::fs::create_dir_all(&temp_dir);
290        let pkg_path = temp_dir.join("package.json");
291        std::fs::write(&pkg_path, r#"{"name": "test", "main": "index.js"}"#).unwrap();
292
293        let pkg = PackageJson::load(&pkg_path).unwrap();
294        assert_eq!(pkg.name, Some("test".to_string()));
295        assert_eq!(pkg.main, Some("index.js".to_string()));
296
297        let _ = std::fs::remove_dir_all(&temp_dir);
298    }
299
300    #[test]
301    fn package_json_load_missing_file() {
302        let result = PackageJson::load(std::path::Path::new("/nonexistent/package.json"));
303        assert!(result.is_err());
304    }
305
306    #[test]
307    fn package_json_entry_points_combined() {
308        let pkg: PackageJson = serde_json::from_str(
309            r#"{
310            "main": "dist/index.js",
311            "module": "dist/index.mjs",
312            "types": "dist/index.d.ts",
313            "typings": "dist/types.d.ts"
314        }"#,
315        )
316        .unwrap();
317        let entries = pkg.entry_points();
318        assert_eq!(entries.len(), 4);
319        assert!(entries.contains(&"dist/index.js".to_string()));
320        assert!(entries.contains(&"dist/index.mjs".to_string()));
321        assert!(entries.contains(&"dist/index.d.ts".to_string()));
322        assert!(entries.contains(&"dist/types.d.ts".to_string()));
323    }
324
325    #[test]
326    fn package_json_exports_nested() {
327        let pkg: PackageJson = serde_json::from_str(
328            r#"{
329            "exports": {
330                ".": {
331                    "import": "./dist/index.mjs",
332                    "require": "./dist/index.cjs"
333                },
334                "./utils": {
335                    "import": "./dist/utils.mjs"
336                }
337            }
338        }"#,
339        )
340        .unwrap();
341        let entries = pkg.entry_points();
342        assert!(entries.contains(&"./dist/index.mjs".to_string()));
343        assert!(entries.contains(&"./dist/index.cjs".to_string()));
344        assert!(entries.contains(&"./dist/utils.mjs".to_string()));
345    }
346
347    #[test]
348    fn package_json_exports_array() {
349        let pkg: PackageJson = serde_json::from_str(
350            r#"{
351            "exports": {
352                ".": ["./dist/index.mjs", "./dist/index.cjs"]
353            }
354        }"#,
355        )
356        .unwrap();
357        let entries = pkg.entry_points();
358        assert!(entries.contains(&"./dist/index.mjs".to_string()));
359        assert!(entries.contains(&"./dist/index.cjs".to_string()));
360    }
361
362    #[test]
363    fn extract_exports_ignores_non_relative() {
364        let pkg: PackageJson = serde_json::from_str(
365            r#"{
366            "exports": {
367                ".": "not-a-relative-path"
368            }
369        }"#,
370        )
371        .unwrap();
372        let entries = pkg.entry_points();
373        // "not-a-relative-path" doesn't start with "./" so should be excluded
374        assert!(entries.is_empty());
375    }
376
377    #[test]
378    fn package_json_source_field() {
379        let pkg: PackageJson = serde_json::from_str(
380            r#"{
381            "main": "dist/index.js",
382            "source": "src/index.ts"
383        }"#,
384        )
385        .unwrap();
386        let entries = pkg.entry_points();
387        assert!(entries.contains(&"src/index.ts".to_string()));
388        assert!(entries.contains(&"dist/index.js".to_string()));
389    }
390
391    #[test]
392    fn package_json_browser_field_string() {
393        let pkg: PackageJson = serde_json::from_str(
394            r#"{
395            "browser": "./dist/browser.js"
396        }"#,
397        )
398        .unwrap();
399        let entries = pkg.entry_points();
400        assert!(entries.contains(&"./dist/browser.js".to_string()));
401    }
402
403    #[test]
404    fn package_json_browser_field_object() {
405        let pkg: PackageJson = serde_json::from_str(
406            r#"{
407            "browser": {
408                "./server.js": "./browser.js",
409                "module-name": false
410            }
411        }"#,
412        )
413        .unwrap();
414        let entries = pkg.entry_points();
415        assert!(entries.contains(&"./browser.js".to_string()));
416        // non-relative paths and false values should be excluded
417        assert_eq!(entries.len(), 1);
418    }
419
420    #[test]
421    fn package_json_exports_string() {
422        let pkg: PackageJson = serde_json::from_str(r#"{"exports": "./dist/index.js"}"#).unwrap();
423        let entries = pkg.entry_points();
424        assert_eq!(entries, vec!["./dist/index.js"]);
425    }
426
427    #[test]
428    fn package_json_workspace_patterns_object_with_nohoist() {
429        let pkg: PackageJson = serde_json::from_str(
430            r#"{
431            "workspaces": {
432                "packages": ["packages/*", "apps/*"],
433                "nohoist": ["**/react-native"]
434            }
435        }"#,
436        )
437        .unwrap();
438        let patterns = pkg.workspace_patterns();
439        assert_eq!(patterns, vec!["packages/*", "apps/*"]);
440    }
441
442    #[test]
443    fn package_json_missing_optional_fields() {
444        let pkg: PackageJson = serde_json::from_str(r"{}").unwrap();
445        assert!(pkg.name.is_none());
446        assert!(pkg.main.is_none());
447        assert!(pkg.module.is_none());
448        assert!(pkg.types.is_none());
449        assert!(pkg.typings.is_none());
450        assert!(pkg.source.is_none());
451        assert!(pkg.browser.is_none());
452        assert!(pkg.bin.is_none());
453        assert!(pkg.exports.is_none());
454        assert!(pkg.dependencies.is_none());
455        assert!(pkg.dev_dependencies.is_none());
456        assert!(pkg.peer_dependencies.is_none());
457        assert!(pkg.optional_dependencies.is_none());
458        assert!(pkg.scripts.is_none());
459        assert!(pkg.workspaces.is_none());
460        assert!(pkg.entry_points().is_empty());
461        assert!(pkg.workspace_patterns().is_empty());
462        assert!(pkg.all_dependency_names().is_empty());
463    }
464
465    #[test]
466    fn package_json_all_dependency_names() {
467        let pkg: PackageJson = serde_json::from_str(
468            r#"{
469            "dependencies": {"react": "^18", "react-dom": "^18"},
470            "devDependencies": {"typescript": "^5"},
471            "peerDependencies": {"node": ">=18"},
472            "optionalDependencies": {"fsevents": "^2"}
473        }"#,
474        )
475        .unwrap();
476        let deps = pkg.all_dependency_names();
477        assert_eq!(deps.len(), 5);
478        assert!(deps.contains(&"react".to_string()));
479        assert!(deps.contains(&"react-dom".to_string()));
480        assert!(deps.contains(&"typescript".to_string()));
481        assert!(deps.contains(&"node".to_string()));
482        assert!(deps.contains(&"fsevents".to_string()));
483    }
484
485    #[test]
486    fn package_json_production_dependency_names() {
487        let pkg: PackageJson = serde_json::from_str(
488            r#"{
489            "dependencies": {"react": "^18"},
490            "devDependencies": {"typescript": "^5"}
491        }"#,
492        )
493        .unwrap();
494        let prod = pkg.production_dependency_names();
495        assert_eq!(prod, vec!["react"]);
496        let dev = pkg.dev_dependency_names();
497        assert_eq!(dev, vec!["typescript"]);
498    }
499
500    #[test]
501    fn package_json_bin_field_string() {
502        let pkg: PackageJson = serde_json::from_str(r#"{"bin": "./cli.js"}"#).unwrap();
503        let entries = pkg.entry_points();
504        assert!(entries.contains(&"./cli.js".to_string()));
505    }
506
507    #[test]
508    fn package_json_bin_field_object() {
509        let pkg: PackageJson = serde_json::from_str(
510            r#"{"bin": {"my-cli": "./bin/cli.js", "my-tool": "./bin/tool.js"}}"#,
511        )
512        .unwrap();
513        let entries = pkg.entry_points();
514        assert!(entries.contains(&"./bin/cli.js".to_string()));
515        assert!(entries.contains(&"./bin/tool.js".to_string()));
516    }
517
518    #[test]
519    fn package_json_exports_deeply_nested() {
520        let pkg: PackageJson = serde_json::from_str(
521            r#"{
522            "exports": {
523                ".": {
524                    "node": {
525                        "import": "./dist/node.mjs",
526                        "require": "./dist/node.cjs"
527                    },
528                    "browser": {
529                        "import": "./dist/browser.mjs"
530                    }
531                }
532            }
533        }"#,
534        )
535        .unwrap();
536        let entries = pkg.entry_points();
537        assert_eq!(entries.len(), 3);
538        assert!(entries.contains(&"./dist/node.mjs".to_string()));
539        assert!(entries.contains(&"./dist/node.cjs".to_string()));
540        assert!(entries.contains(&"./dist/browser.mjs".to_string()));
541    }
542
543    // ── Peer dependency names ───────────────────────────────────────
544
545    #[test]
546    fn package_json_peer_deps_only() {
547        let pkg: PackageJson =
548            serde_json::from_str(r#"{"peerDependencies": {"react": "^18", "react-dom": "^18"}}"#)
549                .unwrap();
550        let all = pkg.all_dependency_names();
551        assert_eq!(all.len(), 2);
552        assert!(all.contains(&"react".to_string()));
553        assert!(all.contains(&"react-dom".to_string()));
554
555        // No production or dev deps
556        assert!(pkg.production_dependency_names().is_empty());
557        assert!(pkg.dev_dependency_names().is_empty());
558    }
559
560    // ── Optional dependencies ───────────────────────────────────────
561
562    #[test]
563    fn package_json_optional_deps_in_all_names() {
564        let pkg: PackageJson =
565            serde_json::from_str(r#"{"optionalDependencies": {"fsevents": "^2"}}"#).unwrap();
566        let all = pkg.all_dependency_names();
567        assert!(all.contains(&"fsevents".to_string()));
568    }
569
570    // ── Browser field edge cases ────────────────────────────────────
571
572    #[test]
573    fn package_json_browser_array_ignored() {
574        // Browser field as array is not supported -- should not crash
575        let pkg: PackageJson =
576            serde_json::from_str(r#"{"browser": ["./a.js", "./b.js"]}"#).unwrap();
577        let entries = pkg.entry_points();
578        assert!(
579            entries.is_empty(),
580            "array browser field should not produce entries"
581        );
582    }
583
584    #[test]
585    fn package_json_browser_object_non_relative_skipped() {
586        let pkg: PackageJson = serde_json::from_str(
587            r#"{"browser": {"crypto": false, "./local.js": "./browser-local.js"}}"#,
588        )
589        .unwrap();
590        let entries = pkg.entry_points();
591        // false is not a string, "crypto" is not relative
592        // only "./browser-local.js" starts with "./"
593        assert_eq!(entries.len(), 1);
594        assert!(entries.contains(&"./browser-local.js".to_string()));
595    }
596
597    // ── Exports field edge cases ────────────────────────────────────
598
599    #[test]
600    fn package_json_exports_null_value() {
601        // Some packages use null for subpath exclusions
602        let pkg: PackageJson =
603            serde_json::from_str(r#"{"exports": {".": "./dist/index.js", "./internal": null}}"#)
604                .unwrap();
605        let entries = pkg.entry_points();
606        assert_eq!(entries.len(), 1);
607        assert!(entries.contains(&"./dist/index.js".to_string()));
608    }
609
610    #[test]
611    fn package_json_exports_empty_object() {
612        let pkg: PackageJson = serde_json::from_str(r#"{"exports": {}}"#).unwrap();
613        let entries = pkg.entry_points();
614        assert!(entries.is_empty());
615    }
616
617    // ── Workspace patterns edge cases ───────────────────────────────
618
619    #[test]
620    fn package_json_workspace_patterns_string_value_ignored() {
621        // workspaces as a string is not a valid format
622        let pkg: PackageJson = serde_json::from_str(r#"{"workspaces": "packages/*"}"#).unwrap();
623        let patterns = pkg.workspace_patterns();
624        assert!(patterns.is_empty());
625    }
626
627    #[test]
628    fn package_json_workspace_patterns_object_missing_packages() {
629        let pkg: PackageJson =
630            serde_json::from_str(r#"{"workspaces": {"nohoist": ["**/react-native"]}}"#).unwrap();
631        let patterns = pkg.workspace_patterns();
632        assert!(patterns.is_empty());
633    }
634
635    // ── Load from invalid JSON ──────────────────────────────────────
636
637    #[test]
638    fn package_json_load_invalid_json() {
639        let temp_dir = std::env::temp_dir().join("fallow-test-invalid-pkg-json");
640        let _ = std::fs::create_dir_all(&temp_dir);
641        let pkg_path = temp_dir.join("package.json");
642        std::fs::write(&pkg_path, "{ not valid json }").unwrap();
643
644        let result = PackageJson::load(&pkg_path);
645        assert!(result.is_err());
646        let err = result.unwrap_err();
647        assert!(err.contains("Failed to parse"), "got: {err}");
648
649        let _ = std::fs::remove_dir_all(&temp_dir);
650    }
651
652    // ── Bin field with non-string value ─────────────────────────────
653
654    #[test]
655    fn package_json_bin_object_non_string_values_skipped() {
656        let pkg: PackageJson =
657            serde_json::from_str(r#"{"bin": {"cli": "./bin/cli.js", "bad": 42}}"#).unwrap();
658        let entries = pkg.entry_points();
659        assert_eq!(entries.len(), 1);
660        assert!(entries.contains(&"./bin/cli.js".to_string()));
661    }
662
663    // ── Default trait ───────────────────────────────────────────────
664
665    #[test]
666    fn package_json_default() {
667        let pkg = PackageJson::default();
668        assert!(pkg.name.is_none());
669        assert!(pkg.main.is_none());
670        assert!(pkg.entry_points().is_empty());
671        assert!(pkg.all_dependency_names().is_empty());
672        assert!(pkg.workspace_patterns().is_empty());
673    }
674
675    // ── Exports subdirectories ─────────────────────────────────────
676
677    #[test]
678    fn exports_subdirectories_preact_style() {
679        let pkg: PackageJson = serde_json::from_str(
680            r#"{
681            "exports": {
682                ".": "./dist/index.js",
683                "./compat": { "import": "./compat/dist/compat.mjs" },
684                "./hooks": { "import": "./hooks/dist/hooks.mjs" },
685                "./debug": { "import": "./debug/dist/debug.mjs" },
686                "./jsx-runtime": { "import": "./jsx-runtime/dist/jsx.mjs" },
687                "./package.json": "./package.json"
688            }
689        }"#,
690        )
691        .unwrap();
692        let mut dirs = pkg.exports_subdirectories();
693        dirs.sort();
694        assert_eq!(dirs, vec!["compat", "debug", "hooks", "jsx-runtime"]);
695    }
696
697    #[test]
698    fn exports_subdirectories_skips_dist_dirs() {
699        let pkg: PackageJson = serde_json::from_str(
700            r#"{
701            "exports": {
702                "./dist/index.js": "./dist/index.js",
703                "./build/bundle.js": "./build/bundle.js",
704                "./lib/utils": "./lib/utils.js",
705                "./compat": "./compat/index.js"
706            }
707        }"#,
708        )
709        .unwrap();
710        let dirs = pkg.exports_subdirectories();
711        // dist, build, lib are skipped
712        assert_eq!(dirs, vec!["compat"]);
713    }
714
715    #[test]
716    fn exports_subdirectories_no_exports() {
717        let pkg: PackageJson = serde_json::from_str(r#"{"main": "index.js"}"#).unwrap();
718        assert!(pkg.exports_subdirectories().is_empty());
719    }
720
721    #[test]
722    fn exports_subdirectories_dot_only() {
723        let pkg: PackageJson =
724            serde_json::from_str(r#"{"exports": {".": "./dist/index.js"}}"#).unwrap();
725        assert!(pkg.exports_subdirectories().is_empty());
726    }
727}
fallow_config/workspace/package_json.rs

fallow_config/workspace/
package_json.rs
