use pep723 to config pyscript

lib/pyscript.typ

@@ -2,26 +2,109 @@
 #let state-pyscript-version = state("state-pyscript-version", none)
 #let state-pyscript-headers = state("state-pyscript-headers", (:))
 
-#let pyscript(
-  repl: false,
-  body
-) = {
-  show raw.where(block: true, lang: "python"): it => {
+#let get-pep723(script) = {
+  script.find(regex(
+    //"(?m)^# /// (?P<type>[a-zA-Z0-9-]+)$\s(?P<content>(^#(| .*)$\s)+)^# ///$"
+    "(?m)^# /// script$\s(?P<content>(^#(| .*)$\s)+)^# ///$"
+  ))
+}
+#let parse-pep723(script) = {
+  let metadata-section = get-pep723(script)
+  if metadata-section == none {
+    return none
+  }
+  let metadata-section = metadata-section.trim(
+    "# /// script\n"
+  ).trim(
+    "# ///"
+  ).replace(regex("(?m)^#(| )"), "")
+  toml(bytes(metadata-section))
+}
+
+// TODO DOCUMENT THIS!
+
+#let pyscript-show(it) = {
+  let metadata = if it.lang != "python" {
+    none
+  } else {
+    parse-pep723(it.text)
+  }
+  if metadata != none and "pyscript" in metadata.at(
+    "tool", default: (:)
+  ) and metadata.at(
+    "tool", default: (:)
+  ).at(
+    "pyscript", default: (:)
+  ).at(
+    "run", default: true
+  ) {
     state-use-pyscript.update(x => true)
-    it
-    let script = it.text;
-    if repl {
-      script = "import code\n" + script + "\ncode.interact(local=globals())"
+    let config = metadata.at("tool", default: (:)).at("pyscript", default: (:))
+
+    let pyscript-config = (:)
+    if "dependencies" in metadata {
+      pyscript-config.insert("packages", metadata.at("dependencies"))
     }
+    if "files" in config {
+      pyscript-config.insert("files", config.at("files"))
+    }
+
+    let attrs = (
+      type: "py"
+    )
+    if pyscript-config != (:) {
+      attrs.insert("config", json.encode(pyscript-config))
+    }
+    if true {
+      attrs.insert("terminal", "")
+      attrs.insert("worker", "")
+    }
+
+    let script = it.text;
+    if config.at("repl", default: false) {
+      script = "import code\n" + script + "\ncode.interact(banner='', local=globals())"
+    }
+    
+    if not config.at("hide-code", default: false) { //and not config.at("hide-meta", default: false) {
+      it
+    }
+    /* Don't work, will require some way of unsetting show rule of something
+    } else if not config.at("hide-code", default: false) and config.at("hide-meta", default: false) {
+      let meta-lines = get-pep723(it.text).split("\n")
+      let code-lines = it.text.split("\n")
+      let meta-line-0 = none
+      for i in range(code-lines.len()) {
+        let match = true
+        for j in range(meta-lines.len()) {
+          if (i + j) >= code-lines.len() or meta-lines.at(j) != code-lines.at(i + j) {
+            match = false
+            break
+          }
+          if match {
+            meta-line-0 = i
+          }
+        }
+      }
+  
+      show raw.line: it => {
+        if meta-line-0 == none {
+          it
+        } else if it.number > meta-line-0 and it.number <= meta-line-0 + meta-lines.len() {
+          none
+        } else {
+          it
+        }
+      }
+      it
+    }*/
+
     html.elem(
       "script", 
-      attrs: (
-        type: "py",
-        terminal: "", 
-        worker: "",
-      ), 
+      attrs: attrs,
       script
     )
+  } else {
+    it
   }
-  body
+  //raw(block: true, lang: "json", json.encode(metadata))
 }