add support for paths on py-env so that we can load local (sort of) scripts into the environment

pyscriptjs/src/components/pyenv.ts

@@ -1,7 +1,7 @@
 import * as jsyaml from 'js-yaml';
 
 import { pyodideLoaded, loadedEnvironments, mode, addInitializer } from '../stores';
-import { loadPackage } from '../interpreter';
+import { loadPackage, loadFromFile } from '../interpreter';
 
 // Premise used to connect to the first available pyodide interpreter
 let pyodideReadyPromise;
@@ -37,13 +37,36 @@ export class PyEnv extends HTMLElement {
     this.code = this.innerHTML;
     this.innerHTML = '';
 
-    let env = this.environment = jsyaml.load(this.code);
+    let env = [];
+    let paths = [];
+    this.environment = jsyaml.load(this.code);
+    for (let entry of this.environment) {
+      if (typeof entry == "string" ){
+        env.push(entry);
+      }
+      else if (entry.hasOwnProperty('paths')){
+        for (let path of entry.paths) {
+          paths.push(path);
+        }
+      }
+    }
+
     async function loadEnv() {
       let pyodide = await pyodideReadyPromise;
       await loadPackage(env, pyodide);
       console.log("enviroment loaded")
     }
+
+    async function loadPaths() {
+      let pyodide = await pyodideReadyPromise;
+      for (let singleFile of paths) {
+        await loadFromFile(singleFile, pyodide);
+      }
+      console.log("paths loaded")
+    }
     addInitializer(loadEnv);
+    addInitializer(loadPaths);
     console.log("enviroment loading...", env)
+
   }
 }

pyscriptjs/src/interpreter.ts

@@ -1,3 +1,5 @@
+import { getLastPath } from "./utils";
+
 // @ts-nocheck
 // @ts-ignore
 let pyodideReadyPromise;
@@ -129,4 +131,19 @@ let loadPackage = async function(package_name: string[] | string, runtime: any):
     await runtime.loadPackage(package_name);
 }
 
-export {loadInterpreter, pyodideReadyPromise, loadPackage}
+let loadFromFile = async function(s: string, runtime: any): Promise<any> {
+    let filename = getLastPath(s);
+    await runtime.runPythonAsync(`
+        from pyodide.http import pyfetch
+        from pyodide import eval_code
+        response = await pyfetch("`+s+`")
+        content = await response.bytes()
+
+        with open("`+filename+`", "wb") as f:
+            f.write(content)
+    `)
+
+    runtime.pyimport(filename.replace(".py", ""));
+}
+
+export {loadInterpreter, pyodideReadyPromise, loadPackage, loadFromFile}

pyscriptjs/src/utils.ts

@@ -1,6 +1,12 @@
 
-export function addClasses(element: HTMLElement, classes: Array<string>){
+function addClasses(element: HTMLElement, classes: Array<string>){
     for (let entry of classes) {
       element.classList.add(entry);
     }
 }
+
+const getLastPath = function (str) {
+  return str.split('\\').pop().split('/').pop();
+}
+
+export {addClasses, getLastPath}