feat: recognize // volume: mounts in PHP scripts (#11018)

* feat: recognize `// volume:` mounts in PHP scripts

Volume annotations were parsed for every language but PHP, so a PHP script
could not mount a workspace volume. Two things stood in the way: PHP had no
entry in the comment-prefix maps, and a PHP script opens with `<?php`, which
ends the leading comment block the parsers scan before any annotation is read.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3FR7iS9nRhpFt615cnuQ7

* fix: tolerate a PHP opener that carries code, drop the inert CLI hunk

The open-tag skip matched `<?php` exactly, so `<?php declare(strict_types=1);`
still ended the leading comment block and every annotation below it was silently
ignored. Match the tag as a case-insensitive prefix and skip the whole line.

The CLI local-graph hunk could never fire: PHP has no wasm asset parser, so
`fallbackParse` handles it, and its own header scan stops at `<?php` — the script
is dropped as a non-pipeline-member before any volume asset is read. Making only
the CLI PHP-aware would also put the local graph out of parity with the deployed
one, whose `parse_pipeline_annotations` stops there too.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3FR7iS9nRhpFt615cnuQ7

* docs: correct the CLI mirror comment, state the own-line annotation rule

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3FR7iS9nRhpFt615cnuQ7

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

backend/windmill-api-scripts/src/asset_inference.rs

@@ -78,20 +78,26 @@ fn comment_prefix(lang: &ScriptLang) -> Option<&'static str> {
         | ScriptLang::Bun
         | ScriptLang::Bunnative
         | ScriptLang::Nativets
-        | ScriptLang::Go => Some("//"),
+        | ScriptLang::Go
+        | ScriptLang::Php => Some("//"),
         _ => None,
     }
 }
 
 /// Mirror of the frontend `parseVolumeAnnotations` (infer.ts): `<prefix>
 /// volume: <path>` lines in the leading comment block, each an `rw` volume
-/// asset. Scanning stops at the first non-comment line (blank lines are
-/// skipped), exactly like the frontend.
+/// asset. Scanning stops at the first non-comment line; blank lines and PHP's
+/// opening tag line are skipped whole (the tag may carry code, so an annotation
+/// must sit on its own line below it), exactly like the frontend.
 fn parse_volume_annotations(content: &str, prefix: &str) -> Vec<AssetWithAltAccessType> {
     let mut volumes = Vec::new();
     for line in content.lines() {
         let trimmed = line.trim();
-        if trimmed.is_empty() {
+        if trimmed.is_empty()
+            || trimmed
+                .get(..5)
+                .is_some_and(|p| p.eq_ignore_ascii_case("<?php"))
+        {
             continue;
         }
         let Some(after) = trimmed.strip_prefix(prefix) else {
@@ -258,4 +264,13 @@ mod tests {
         assert_eq!(vols[0].path, "my_vol");
         assert_eq!(vols[0].access_type, Some(AssetUsageAccessType::RW));
     }
+
+    #[test]
+    fn php_volume_annotations_survive_the_open_tag() {
+        let content = "<?php\n\n// volume: my_vol\nfunction main() {}\n";
+        let got = effective_script_assets(&ScriptLang::Php, content, None).unwrap();
+        let vols: Vec<_> = got.iter().filter(|a| a.kind == AssetKind::Volume).collect();
+        assert_eq!(vols.len(), 1);
+        assert_eq!(vols[0].path, "my_vol");
+    }
 }

backend/windmill-worker-volumes/src/lib.rs

@@ -179,11 +179,24 @@ pub fn interpolate_volume_name(
     result
 }
 
+/// PHP's opening tag, which is case-insensitive and may be followed by code.
+fn is_php_open_tag(trimmed_line: &str) -> bool {
+    trimmed_line
+        .get(..5)
+        .is_some_and(|p| p.eq_ignore_ascii_case("<?php"))
+}
+
+/// Scans the leading comment block for `<prefix> volume: <name> <target>` lines,
+/// stopping at the first line that is neither blank nor a comment. A PHP script
+/// opens with `<?php`, which is not a comment, so that line is skipped like a blank
+/// one; otherwise the block would end before reaching any annotation. The whole line
+/// goes, since the tag may carry code (`<?php declare(strict_types=1);`) — so an
+/// annotation must sit on its own line, below the opener.
 pub fn parse_volume_annotations(content: &str, comment_prefix: &str) -> Vec<VolumeMount> {
     let mut volumes = Vec::new();
     for line in content.lines() {
         let trimmed = line.trim();
-        if trimmed.is_empty() {
+        if trimmed.is_empty() || is_php_open_tag(trimmed) {
             continue;
         }
         if !trimmed.starts_with(comment_prefix) {
@@ -230,6 +243,17 @@ mod tests {
         );
     }
 
+    #[test]
+    fn parse_php_volume_after_open_tag() {
+        let content =
+            "<?php declare(strict_types=1);\n\n// volume: mydata /tmp/data\nfunction main() {}";
+        let result = parse_volume_annotations(content, "//");
+        assert_eq!(
+            result,
+            vec![VolumeMount { name: "mydata".to_string(), target: "/tmp/data".to_string() }]
+        );
+    }
+
     #[test]
     fn parse_multiple_volumes() {
         let content = "# volume: data1 /tmp/data1\n# volume: data2 /tmp/data2\n# volume: models /opt/models\ndef main():\n    pass";

backend/windmill-worker/src/worker.rs

@@ -6412,7 +6412,8 @@ mount {{
             | ScriptLang::Bun
             | ScriptLang::Bunnative
             | ScriptLang::Nativets
-            | ScriptLang::Go => "//",
+            | ScriptLang::Go
+            | ScriptLang::Php => "//",
             _ => "",
         };
         let raw_mounts = windmill_worker_volumes::parse_volume_annotations(&code, comment_prefix);

cli/src/commands/pipeline/localGraph.ts

@@ -413,7 +413,13 @@ export function parseMuteAnnotations(content: string): {
 // Comment prefix for `volume:` annotations. Deliberately NOT `commentPrefix`
 // above (which returns `--` for SQL): volume annotations are only recognized for
 // the languages the backend/frontend recognize them for — mirrors
-// `asset_inference.rs:comment_prefix` and `infer.ts:getCommentPrefix` (SQL → none).
+// `asset_inference.rs:comment_prefix` and `infer.ts:getCommentPrefix` (SQL → none),
+// minus `php`. Those two recognize PHP, but a PHP script cannot reach this map: it
+// has no wasm asset parser, so `fallbackParse` handles it and that scan breaks on
+// the mandatory `<?php` opener, leaving `in_pipeline` false and the script dropped
+// as a non-member. Add `php` here together with PHP support in the pipeline
+// annotation scanners (backend `parse_pipeline_annotations` + its frontend mirror
+// + the header scans in this file), or the local graph desyncs from the deployed one.
 function volumeCommentPrefix(language: string): string | undefined {
   switch (language) {
     case "python3":

frontend/src/lib/infer.ts

@@ -204,11 +204,16 @@ export type PreparedAssetsSqlQuery =
 	| { columns: Record<string, string> } // e.g { id: "number", name: "text" }
 	| { error: string; columns?: undefined } // error message if preparation failed
 
+// Scans the leading comment block, stopping at the first line that is neither blank
+// nor a comment. A PHP script opens with `<?php`, which is not a comment, so that line
+// is skipped like a blank one; otherwise the block would end before reaching any
+// annotation. The whole line goes, since the tag may carry code (`<?php declare(…);`) —
+// so an annotation must sit on its own line, below the opener.
 function parseVolumeAnnotations(code: string, commentPrefix: string): AssetWithAccessType[] {
 	const volumes: AssetWithAccessType[] = []
 	for (const line of code.split('\n')) {
 		const trimmed = line.trim()
-		if (!trimmed) continue
+		if (!trimmed || trimmed.slice(0, 5).toLowerCase() === '<?php') continue
 		if (!trimmed.startsWith(commentPrefix)) break
 		const after = trimmed.slice(commentPrefix.length).trim()
 		const match = after.match(/^volume:\s*(\S+)/)
@@ -233,6 +238,7 @@ function getCommentPrefix(language: SupportedLanguage | undefined): string | und
 		case 'bunnative':
 		case 'nativets':
 		case 'go':
+		case 'php':
 			return '//'
 		default:
 			return undefined