fallow_extract/
html.rs

1//! HTML file parsing for script, stylesheet, and Angular template references.
2//!
3//! Extracts `<script src="...">` and `<link rel="stylesheet" href="...">` references
4//! from HTML files, creating graph edges so that referenced JS/CSS assets (and their
5//! transitive imports) are reachable from the HTML entry point.
6//!
7//! Also scans for Angular template syntax (`{{ }}`, `[prop]`, `(event)`, `@if`, etc.)
8//! and stores referenced identifiers as `MemberAccess` entries with a sentinel object,
9//! enabling the analysis phase to credit component class members used in external templates.
10
11use std::path::Path;
12use std::sync::LazyLock;
13
14use oxc_span::Span;
15
16use crate::asset_url::normalize_asset_url;
17use crate::sfc_template::angular::{self, ANGULAR_TPL_SENTINEL};
18use crate::{ImportInfo, ImportedName, MemberAccess, ModuleInfo};
19use fallow_types::discover::FileId;
20
21/// Regex to match HTML comments (`<!-- ... -->`) for stripping before extraction.
22static HTML_COMMENT_RE: LazyLock<regex::Regex> =
23    LazyLock::new(|| crate::static_regex(r"(?s)<!--.*?-->"));
24
25/// Regex to extract `src` attribute from `<script>` tags.
26/// Matches both `<script src="...">` and `<script type="module" src="...">`.
27/// Uses `(?s)` so `.` matches newlines (multi-line attributes).
28static SCRIPT_SRC_RE: LazyLock<regex::Regex> = LazyLock::new(|| {
29    crate::static_regex(r#"(?si)<script\b(?:[^>"']|"[^"]*"|'[^']*')*?\bsrc\s*=\s*["']([^"']+)["']"#)
30});
31
32/// Regex to extract `href` attribute from `<link>` tags with `rel="stylesheet"` or
33/// `rel="modulepreload"`.
34/// Handles attributes in any order (rel before or after href).
35static LINK_HREF_RE: LazyLock<regex::Regex> = LazyLock::new(|| {
36    crate::static_regex(
37        r#"(?si)<link\b(?:[^>"']|"[^"]*"|'[^']*')*?\brel\s*=\s*["'](stylesheet|modulepreload)["'](?:[^>"']|"[^"]*"|'[^']*')*?\bhref\s*=\s*["']([^"']+)["']"#,
38    )
39});
40
41/// Regex for the reverse attribute order: href before rel.
42static LINK_HREF_REVERSE_RE: LazyLock<regex::Regex> = LazyLock::new(|| {
43    crate::static_regex(
44        r#"(?si)<link\b(?:[^>"']|"[^"]*"|'[^']*')*?\bhref\s*=\s*["']([^"']+)["'](?:[^>"']|"[^"]*"|'[^']*')*?\brel\s*=\s*["'](stylesheet|modulepreload)["']"#,
45    )
46});
47
48/// Check if a path is an HTML file.
49pub(crate) fn is_html_file(path: &Path) -> bool {
50    path.extension()
51        .and_then(|e| e.to_str())
52        .is_some_and(|ext| ext == "html")
53}
54
55/// Returns true if an HTML asset reference is a remote URL that should be skipped.
56pub(crate) fn is_remote_url(src: &str) -> bool {
57    src.starts_with("http://")
58        || src.starts_with("https://")
59        || src.starts_with("//")
60        || src.starts_with("data:")
61}
62
63/// Build-time template placeholders that aren't valid import specifiers and
64/// never resolve to a real file. Skip them at extraction time so they don't
65/// enter the import graph as unresolvable specifiers.
66///
67/// - `{{ ... }}` covers Handlebars (Ember `index.html`'s `{{rootURL}}`,
68///   `{{config.assetsPath}}`), Mustache (Jekyll, Hugo), Jinja2 (Pelican /
69///   11ty plugins), and pre-compiled Vue / Angular templates whose
70///   interpolation has leaked into a checked-in HTML scaffold.
71/// - `###...###` covers ember-cli blueprint scaffold placeholders
72///   (`###APPNAME###`, `###DUMMY###`) checked in as addon-fixture templates.
73///
74/// Neither shape is a legal URL or path character outside template engines,
75/// so the skip is generic across frameworks rather than gated on a plugin.
76/// Returns `true` for any `src` / `href` value that contains either marker.
77pub(crate) fn is_template_placeholder(value: &str) -> bool {
78    value.contains("{{") || value.contains("###")
79}
80
81/// Extract local (non-remote) asset references from HTML-like markup.
82///
83/// Returns the raw `src`/`href` strings (trimmed, remote URLs filtered). Shared
84/// between the HTML file parser and the JS/TS visitor's tagged template
85/// literal override so `` html`<script src="...">` `` in Hono/lit-html/htm
86/// layouts emits the same asset edges as a real `.html` file.
87pub(crate) fn collect_asset_refs(source: &str) -> Vec<String> {
88    let stripped = HTML_COMMENT_RE.replace_all(source, "");
89    let mut refs: Vec<String> = Vec::new();
90
91    for cap in SCRIPT_SRC_RE.captures_iter(&stripped) {
92        if let Some(m) = cap.get(1) {
93            let src = m.as_str().trim();
94            if !src.is_empty() && !is_remote_url(src) && !is_template_placeholder(src) {
95                refs.push(src.to_string());
96            }
97        }
98    }
99
100    for cap in LINK_HREF_RE.captures_iter(&stripped) {
101        if let Some(m) = cap.get(2) {
102            let href = m.as_str().trim();
103            if !href.is_empty() && !is_remote_url(href) && !is_template_placeholder(href) {
104                refs.push(href.to_string());
105            }
106        }
107    }
108    for cap in LINK_HREF_REVERSE_RE.captures_iter(&stripped) {
109        if let Some(m) = cap.get(1) {
110            let href = m.as_str().trim();
111            if !href.is_empty() && !is_remote_url(href) && !is_template_placeholder(href) {
112                refs.push(href.to_string());
113            }
114        }
115    }
116
117    refs
118}
119
120/// Parse an HTML file, extracting script and stylesheet references as imports.
121#[cfg(test)]
122pub(crate) fn parse_html_to_module(file_id: FileId, source: &str, content_hash: u64) -> ModuleInfo {
123    parse_html_to_module_with_complexity(file_id, source, content_hash, false)
124}
125
126/// Computed building blocks for an HTML [`ModuleInfo`], gathered before the
127/// (irreducible) struct literal is assembled.
128struct HtmlModuleParts {
129    imports: Vec<ImportInfo>,
130    member_accesses: Vec<MemberAccess>,
131    security_sinks: Vec<fallow_types::extract::SinkSite>,
132    angular_used_selectors: Vec<String>,
133    has_dynamic_component_render: bool,
134    complexity: Vec<fallow_types::extract::FunctionComplexity>,
135}
136
137/// Collect the asset-reference imports, Angular template member accesses /
138/// security sinks / used selectors, and (optionally) template complexity for an
139/// HTML source.
140fn collect_html_module_parts(source: &str, need_complexity: bool) -> HtmlModuleParts {
141    let mut imports: Vec<ImportInfo> = collect_asset_refs(source)
142        .into_iter()
143        .map(|raw| ImportInfo {
144            source: normalize_asset_url(&raw),
145            imported_name: ImportedName::SideEffect,
146            local_name: String::new(),
147            is_type_only: false,
148            from_style: false,
149            span: Span::default(),
150            source_span: Span::default(),
151        })
152        .collect();
153
154    imports.sort_unstable_by(|a, b| a.source.cmp(&b.source));
155    imports.dedup_by(|a, b| a.source == b.source);
156
157    let angular::AngularTemplateRefs {
158        identifiers,
159        member_accesses: template_member_accesses,
160        security_sinks,
161    } = angular::collect_angular_template_refs(source);
162    let mut member_accesses: Vec<MemberAccess> = identifiers
163        .into_iter()
164        .map(|name| MemberAccess {
165            object: ANGULAR_TPL_SENTINEL.to_string(),
166            member: name,
167        })
168        .collect();
169    member_accesses.extend(template_member_accesses);
170
171    // Angular external template (`templateUrl`): harvest the custom element
172    // selector tags rendered here so the Angular `unrendered-component` detector
173    // unions them into the project-wide used-selector set, and flag the
174    // `*ngComponentOutlet` dynamic-render escape hatch (project-wide abstain).
175    let angular_used_selectors = angular::collect_angular_used_selectors(source);
176    let has_dynamic_component_render = source.contains("ngComponentOutlet");
177
178    let complexity = if need_complexity {
179        crate::template_complexity::compute_angular_template_complexity(source)
180            .into_iter()
181            .collect()
182    } else {
183        Vec::new()
184    };
185
186    HtmlModuleParts {
187        imports,
188        member_accesses,
189        security_sinks,
190        angular_used_selectors,
191        has_dynamic_component_render,
192        complexity,
193    }
194}
195
196/// Parse an HTML file and optionally compute Angular template complexity.
197pub(crate) fn parse_html_to_module_with_complexity(
198    file_id: FileId,
199    source: &str,
200    content_hash: u64,
201    need_complexity: bool,
202) -> ModuleInfo {
203    let parsed_suppressions = crate::suppress::parse_suppressions_from_source(source);
204    let parts = collect_html_module_parts(source, need_complexity);
205    html_module_info(file_id, content_hash, source, parsed_suppressions, parts)
206}
207
208/// Assemble the `ModuleInfo` for an HTML file from its computed parts; all
209/// JS-level fields stay empty since HTML carries no module structure. Pure
210/// plumbing struct literal.
211fn html_module_info(
212    file_id: FileId,
213    content_hash: u64,
214    source: &str,
215    parsed_suppressions: crate::suppress::ParsedSuppressions,
216    parts: HtmlModuleParts,
217) -> ModuleInfo {
218    let HtmlModuleParts {
219        imports,
220        member_accesses,
221        security_sinks,
222        angular_used_selectors,
223        has_dynamic_component_render,
224        complexity,
225    } = parts;
226
227    ModuleInfo {
228        file_id,
229        exports: Vec::new(),
230        imports,
231        re_exports: Vec::new(),
232        dynamic_imports: Vec::new(),
233        dynamic_import_patterns: Vec::new(),
234        require_calls: Vec::new(),
235        package_path_references: Vec::new(),
236        member_accesses,
237        whole_object_uses: Vec::new(),
238        has_cjs_exports: false,
239        has_angular_component_template_url: false,
240        content_hash,
241        suppressions: parsed_suppressions.suppressions,
242        unknown_suppression_kinds: parsed_suppressions.unknown_kinds,
243        unused_import_bindings: Vec::new(),
244        type_referenced_import_bindings: Vec::new(),
245        value_referenced_import_bindings: Vec::new(),
246        line_offsets: fallow_types::extract::compute_line_offsets(source),
247        complexity,
248        flag_uses: Vec::new(),
249        class_heritage: vec![],
250        injection_tokens: vec![],
251        local_type_declarations: Vec::new(),
252        public_signature_type_references: Vec::new(),
253        namespace_object_aliases: Vec::new(),
254        iconify_prefixes: Vec::new(),
255        iconify_icon_names: Vec::new(),
256        auto_import_candidates: Vec::new(),
257        directives: Vec::new(),
258        client_only_dynamic_import_spans: Vec::new(),
259        security_sinks,
260        security_sinks_skipped: 0,
261        security_unresolved_callee_sites: Vec::new(),
262        tainted_bindings: Vec::new(),
263        sanitized_sink_args: Vec::new(),
264        security_control_sites: Vec::new(),
265        callee_uses: Vec::new(),
266        misplaced_directives: Vec::new(),
267        inline_server_action_exports: Vec::new(),
268        di_key_sites: Vec::new(),
269        has_dynamic_provide: false,
270        referenced_import_bindings: Vec::new(),
271        component_props: Vec::new(),
272        has_props_attrs_fallthrough: false,
273        has_define_expose: false,
274        has_define_model: false,
275        has_unharvestable_props: false,
276        component_emits: Vec::new(),
277        angular_inputs: Vec::new(),
278        angular_outputs: Vec::new(),
279        angular_component_selectors: Vec::new(),
280        angular_used_selectors,
281        angular_entry_component_refs: Vec::new(),
282        has_dynamic_component_render,
283        has_unharvestable_emits: false,
284        has_dynamic_emit: false,
285        has_emit_whole_object_use: false,
286        load_return_keys: Vec::new(),
287        has_unharvestable_load: false,
288        has_load_data_whole_use: false,
289        has_page_data_store_whole_use: false,
290        component_functions: Vec::new(),
291        react_props: Vec::new(),
292        hook_uses: Vec::new(),
293        render_edges: Vec::new(),
294        svelte_dispatched_events: Vec::new(),
295        svelte_listened_events: Vec::new(),
296        has_dynamic_dispatch: false,
297    }
298}
299
300#[cfg(test)]
301mod tests {
302    use super::*;
303
304    #[test]
305    fn is_html_file_html() {
306        assert!(is_html_file(Path::new("index.html")));
307    }
308
309    #[test]
310    fn is_html_file_nested() {
311        assert!(is_html_file(Path::new("pages/about.html")));
312    }
313
314    #[test]
315    fn is_html_file_rejects_htm() {
316        assert!(!is_html_file(Path::new("index.htm")));
317    }
318
319    #[test]
320    fn is_html_file_rejects_js() {
321        assert!(!is_html_file(Path::new("app.js")));
322    }
323
324    #[test]
325    fn is_html_file_rejects_ts() {
326        assert!(!is_html_file(Path::new("app.ts")));
327    }
328
329    #[test]
330    fn is_html_file_rejects_vue() {
331        assert!(!is_html_file(Path::new("App.vue")));
332    }
333
334    #[test]
335    fn remote_url_http() {
336        assert!(is_remote_url("http://example.com/script.js"));
337    }
338
339    #[test]
340    fn remote_url_https() {
341        assert!(is_remote_url("https://cdn.example.com/style.css"));
342    }
343
344    #[test]
345    fn remote_url_protocol_relative() {
346        assert!(is_remote_url("//cdn.example.com/lib.js"));
347    }
348
349    #[test]
350    fn remote_url_data() {
351        assert!(is_remote_url("data:text/javascript;base64,abc"));
352    }
353
354    #[test]
355    fn local_relative_not_remote() {
356        assert!(!is_remote_url("./src/entry.js"));
357    }
358
359    #[test]
360    fn local_root_relative_not_remote() {
361        assert!(!is_remote_url("/src/entry.js"));
362    }
363
364    #[test]
365    fn extracts_module_script_src() {
366        let info = parse_html_to_module(
367            FileId(0),
368            r#"<script type="module" src="./src/entry.js"></script>"#,
369            0,
370        );
371        assert_eq!(info.imports.len(), 1);
372        assert_eq!(info.imports[0].source, "./src/entry.js");
373    }
374
375    #[test]
376    fn extracts_plain_script_src() {
377        let info = parse_html_to_module(
378            FileId(0),
379            r#"<script src="./src/polyfills.js"></script>"#,
380            0,
381        );
382        assert_eq!(info.imports.len(), 1);
383        assert_eq!(info.imports[0].source, "./src/polyfills.js");
384    }
385
386    #[test]
387    fn extracts_multiple_scripts() {
388        let info = parse_html_to_module(
389            FileId(0),
390            r#"
391            <script type="module" src="./src/entry.js"></script>
392            <script src="./src/polyfills.js"></script>
393            "#,
394            0,
395        );
396        assert_eq!(info.imports.len(), 2);
397    }
398
399    #[test]
400    fn skips_inline_script() {
401        let info = parse_html_to_module(FileId(0), r#"<script>console.log("hello");</script>"#, 0);
402        assert!(info.imports.is_empty());
403    }
404
405    #[test]
406    fn skips_handlebars_placeholder_in_script_src() {
407        let info = parse_html_to_module(
408            FileId(0),
409            r#"<script src="{{rootURL}}assets/app.js"></script>
410               <script src="{{config.assetsPath}}vendor.js"></script>"#,
411            0,
412        );
413        assert!(
414            info.imports.is_empty(),
415            "Handlebars-placeholder script srcs should not enter the import graph; got {:?}",
416            info.imports
417        );
418    }
419
420    #[test]
421    fn skips_handlebars_placeholder_in_link_href() {
422        let info = parse_html_to_module(
423            FileId(0),
424            r#"<link rel="stylesheet" href="{{rootURL}}assets/app.css">"#,
425            0,
426        );
427        assert!(info.imports.is_empty());
428    }
429
430    #[test]
431    fn skips_ember_cli_blueprint_placeholder() {
432        let info = parse_html_to_module(
433            FileId(0),
434            r####"<script src="###APPNAME###/app.js"></script>"####,
435            0,
436        );
437        assert!(info.imports.is_empty());
438    }
439
440    #[test]
441    fn extracts_normal_specifier_alongside_placeholders() {
442        let info = parse_html_to_module(
443            FileId(0),
444            r#"<script src="{{rootURL}}assets/app.js"></script>
445               <script src="./src/main.ts"></script>"#,
446            0,
447        );
448        assert_eq!(info.imports.len(), 1);
449        assert_eq!(info.imports[0].source, "./src/main.ts");
450    }
451
452    #[test]
453    fn skips_remote_script() {
454        let info = parse_html_to_module(
455            FileId(0),
456            r#"<script src="https://cdn.example.com/lib.js"></script>"#,
457            0,
458        );
459        assert!(info.imports.is_empty());
460    }
461
462    #[test]
463    fn skips_protocol_relative_script() {
464        let info = parse_html_to_module(
465            FileId(0),
466            r#"<script src="//cdn.example.com/lib.js"></script>"#,
467            0,
468        );
469        assert!(info.imports.is_empty());
470    }
471
472    #[test]
473    fn extracts_stylesheet_link() {
474        let info = parse_html_to_module(
475            FileId(0),
476            r#"<link rel="stylesheet" href="./src/global.css" />"#,
477            0,
478        );
479        assert_eq!(info.imports.len(), 1);
480        assert_eq!(info.imports[0].source, "./src/global.css");
481    }
482
483    #[test]
484    fn extracts_modulepreload_link() {
485        let info = parse_html_to_module(
486            FileId(0),
487            r#"<link rel="modulepreload" href="./src/vendor.js" />"#,
488            0,
489        );
490        assert_eq!(info.imports.len(), 1);
491        assert_eq!(info.imports[0].source, "./src/vendor.js");
492    }
493
494    #[test]
495    fn extracts_link_with_reversed_attrs() {
496        let info = parse_html_to_module(
497            FileId(0),
498            r#"<link href="./src/global.css" rel="stylesheet" />"#,
499            0,
500        );
501        assert_eq!(info.imports.len(), 1);
502        assert_eq!(info.imports[0].source, "./src/global.css");
503    }
504
505    #[test]
506    fn bare_script_src_normalized_to_relative() {
507        let info = parse_html_to_module(FileId(0), r#"<script src="app.js"></script>"#, 0);
508        assert_eq!(info.imports.len(), 1);
509        assert_eq!(info.imports[0].source, "./app.js");
510    }
511
512    #[test]
513    fn bare_module_script_src_normalized_to_relative() {
514        let info = parse_html_to_module(
515            FileId(0),
516            r#"<script type="module" src="main.ts"></script>"#,
517            0,
518        );
519        assert_eq!(info.imports.len(), 1);
520        assert_eq!(info.imports[0].source, "./main.ts");
521    }
522
523    #[test]
524    fn bare_stylesheet_link_href_normalized_to_relative() {
525        let info = parse_html_to_module(
526            FileId(0),
527            r#"<link rel="stylesheet" href="styles.css" />"#,
528            0,
529        );
530        assert_eq!(info.imports.len(), 1);
531        assert_eq!(info.imports[0].source, "./styles.css");
532    }
533
534    #[test]
535    fn bare_link_href_reversed_attrs_normalized_to_relative() {
536        let info = parse_html_to_module(
537            FileId(0),
538            r#"<link href="styles.css" rel="stylesheet" />"#,
539            0,
540        );
541        assert_eq!(info.imports.len(), 1);
542        assert_eq!(info.imports[0].source, "./styles.css");
543    }
544
545    #[test]
546    fn bare_modulepreload_link_href_normalized_to_relative() {
547        let info = parse_html_to_module(
548            FileId(0),
549            r#"<link rel="modulepreload" href="vendor.js" />"#,
550            0,
551        );
552        assert_eq!(info.imports.len(), 1);
553        assert_eq!(info.imports[0].source, "./vendor.js");
554    }
555
556    #[test]
557    fn bare_asset_with_subdir_normalized_to_relative() {
558        let info = parse_html_to_module(FileId(0), r#"<script src="assets/app.js"></script>"#, 0);
559        assert_eq!(info.imports.len(), 1);
560        assert_eq!(info.imports[0].source, "./assets/app.js");
561    }
562
563    #[test]
564    fn root_absolute_script_src_unchanged() {
565        let info = parse_html_to_module(FileId(0), r#"<script src="/src/main.ts"></script>"#, 0);
566        assert_eq!(info.imports.len(), 1);
567        assert_eq!(info.imports[0].source, "/src/main.ts");
568    }
569
570    #[test]
571    fn parent_relative_script_src_unchanged() {
572        let info = parse_html_to_module(
573            FileId(0),
574            r#"<script src="../shared/vendor.js"></script>"#,
575            0,
576        );
577        assert_eq!(info.imports.len(), 1);
578        assert_eq!(info.imports[0].source, "../shared/vendor.js");
579    }
580
581    #[test]
582    fn skips_preload_link() {
583        let info = parse_html_to_module(
584            FileId(0),
585            r#"<link rel="preload" href="./src/font.woff2" as="font" />"#,
586            0,
587        );
588        assert!(info.imports.is_empty());
589    }
590
591    #[test]
592    fn skips_icon_link() {
593        let info =
594            parse_html_to_module(FileId(0), r#"<link rel="icon" href="./favicon.ico" />"#, 0);
595        assert!(info.imports.is_empty());
596    }
597
598    #[test]
599    fn skips_remote_stylesheet() {
600        let info = parse_html_to_module(
601            FileId(0),
602            r#"<link rel="stylesheet" href="https://fonts.googleapis.com/css" />"#,
603            0,
604        );
605        assert!(info.imports.is_empty());
606    }
607
608    #[test]
609    fn skips_commented_out_script() {
610        let info = parse_html_to_module(
611            FileId(0),
612            r#"<!-- <script src="./old.js"></script> -->
613            <script src="./new.js"></script>"#,
614            0,
615        );
616        assert_eq!(info.imports.len(), 1);
617        assert_eq!(info.imports[0].source, "./new.js");
618    }
619
620    #[test]
621    fn skips_commented_out_link() {
622        let info = parse_html_to_module(
623            FileId(0),
624            r#"<!-- <link rel="stylesheet" href="./old.css" /> -->
625            <link rel="stylesheet" href="./new.css" />"#,
626            0,
627        );
628        assert_eq!(info.imports.len(), 1);
629        assert_eq!(info.imports[0].source, "./new.css");
630    }
631
632    #[test]
633    fn handles_multiline_script_tag() {
634        let info = parse_html_to_module(
635            FileId(0),
636            "<script\n  type=\"module\"\n  src=\"./src/entry.js\"\n></script>",
637            0,
638        );
639        assert_eq!(info.imports.len(), 1);
640        assert_eq!(info.imports[0].source, "./src/entry.js");
641    }
642
643    #[test]
644    fn handles_multiline_link_tag() {
645        let info = parse_html_to_module(
646            FileId(0),
647            "<link\n  rel=\"stylesheet\"\n  href=\"./src/global.css\"\n/>",
648            0,
649        );
650        assert_eq!(info.imports.len(), 1);
651        assert_eq!(info.imports[0].source, "./src/global.css");
652    }
653
654    #[test]
655    fn full_vite_html() {
656        let info = parse_html_to_module(
657            FileId(0),
658            r#"<!doctype html>
659<html>
660  <head>
661    <link rel="stylesheet" href="./src/global.css" />
662    <link rel="icon" href="/favicon.ico" />
663  </head>
664  <body>
665    <div id="app"></div>
666    <script type="module" src="./src/entry.js"></script>
667  </body>
668</html>"#,
669            0,
670        );
671        assert_eq!(info.imports.len(), 2);
672        let sources: Vec<&str> = info.imports.iter().map(|i| i.source.as_str()).collect();
673        assert!(sources.contains(&"./src/global.css"));
674        assert!(sources.contains(&"./src/entry.js"));
675    }
676
677    #[test]
678    fn empty_html() {
679        let info = parse_html_to_module(FileId(0), "", 0);
680        assert!(info.imports.is_empty());
681    }
682
683    #[test]
684    fn html_with_no_assets() {
685        let info = parse_html_to_module(
686            FileId(0),
687            r"<!doctype html><html><body><h1>Hello</h1></body></html>",
688            0,
689        );
690        assert!(info.imports.is_empty());
691    }
692
693    #[test]
694    fn single_quoted_attributes() {
695        let info = parse_html_to_module(FileId(0), r"<script src='./src/entry.js'></script>", 0);
696        assert_eq!(info.imports.len(), 1);
697        assert_eq!(info.imports[0].source, "./src/entry.js");
698    }
699
700    #[test]
701    fn all_imports_are_side_effect() {
702        let info = parse_html_to_module(
703            FileId(0),
704            r#"<script src="./entry.js"></script>
705            <link rel="stylesheet" href="./style.css" />"#,
706            0,
707        );
708        for imp in &info.imports {
709            assert!(matches!(imp.imported_name, ImportedName::SideEffect));
710            assert!(imp.local_name.is_empty());
711            assert!(!imp.is_type_only);
712        }
713    }
714
715    #[test]
716    fn suppression_comments_extracted() {
717        let info = parse_html_to_module(
718            FileId(0),
719            "<!-- fallow-ignore-file -->\n<script src=\"./entry.js\"></script>",
720            0,
721        );
722        assert_eq!(info.imports.len(), 1);
723    }
724
725    #[test]
726    fn angular_template_extracts_member_refs() {
727        let info = parse_html_to_module(
728            FileId(0),
729            "<h1>{{ title() }}</h1>\n\
730             <p [class.highlighted]=\"isHighlighted\">{{ greeting() }}</p>\n\
731             <button (click)=\"onButtonClick()\">Toggle</button>",
732            0,
733        );
734        let names: rustc_hash::FxHashSet<&str> = info
735            .member_accesses
736            .iter()
737            .filter(|a| a.object == ANGULAR_TPL_SENTINEL)
738            .map(|a| a.member.as_str())
739            .collect();
740        assert!(names.contains("title"), "should contain 'title'");
741        assert!(
742            names.contains("isHighlighted"),
743            "should contain 'isHighlighted'"
744        );
745        assert!(names.contains("greeting"), "should contain 'greeting'");
746        assert!(
747            names.contains("onButtonClick"),
748            "should contain 'onButtonClick'"
749        );
750    }
751
752    #[test]
753    fn plain_html_no_angular_refs() {
754        let info = parse_html_to_module(
755            FileId(0),
756            "<!doctype html><html><body><h1>Hello</h1></body></html>",
757            0,
758        );
759        assert!(info.member_accesses.is_empty());
760    }
761}
fallow_extract/html.rs

fallow_extract/
html.rs
