If no indexURL is provided, we throw and catch an error and
then use ErrorStackParser to calculate where pyodide.js has
been loaded from. Resolves #2290.
ENH Calculate indexURL from error stack trace. If no indexURL is provided, we throw and catch an error and
then use ErrorStackParser to calculate where pyodide.js has
been loaded from. Resolves #2290.
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <script src="https://cdn.jsdelivr.net/npm/jquery"></script>
    <script src="https://cdn.jsdelivr.net/npm/jquery.terminal@2.32.0/js/jquery.terminal.min.js"></script>
    <link
      href="https://cdn.jsdelivr.net/npm/jquery.terminal@2.32.0/css/jquery.terminal.min.css"
      rel="stylesheet"
    />
    <script src="{{ PYODIDE_BASE_URL }}pyodide.js"></script>
    <style>
      .terminal {
        --size: 1.5;
        --color: rgba(255, 255, 255, 0.8);
      }
    </style>
  </head>
  <body>
    <script>
      "use strict";
      function sleep(s) {
        return new Promise((resolve) => setTimeout(resolve, s));
      }

      async function main() {
        globalThis.pyodide = await loadPyodide({
          indexURL: "{{ PYODIDE_BASE_URL }}",
        });
        let namespace = pyodide.globals.get("dict")();
        pyodide.runPython(
          `
            import sys
            from pyodide import to_js
            from pyodide.console import PyodideConsole, repr_shorten, BANNER
            import __main__
            BANNER = "Welcome to the Pyodide terminal emulator 🐍\\n" + BANNER
            pyconsole = PyodideConsole(__main__.__dict__)
            import builtins
            async def await_fut(fut):
              res = await fut
              if res is not None:
                builtins._ = res
              return to_js([res], depth=1)
            def clear_console():
              pyconsole.buffer = []
        `,
          namespace
        );
        let repr_shorten = namespace.get("repr_shorten");
        let banner = namespace.get("BANNER");
        let await_fut = namespace.get("await_fut");
        let pyconsole = namespace.get("pyconsole");
        let clear_console = namespace.get("clear_console");
        namespace.destroy();

        let ps1 = ">>> ",
          ps2 = "... ";

        async function lock() {
          let resolve;
          let ready = term.ready;
          term.ready = new Promise((res) => (resolve = res));
          await ready;
          return resolve;
        }

        async function interpreter(command) {
          let unlock = await lock();
          term.pause();
          // multiline should be split (useful when pasting)
          for (const c of command.split("\n")) {
            let fut = pyconsole.push(c);
            term.set_prompt(fut.syntax_check === "incomplete" ? ps2 : ps1);
            switch (fut.syntax_check) {
              case "syntax-error":
                term.error(fut.formatted_error.trimEnd());
                continue;
              case "incomplete":
                continue;
              case "complete":
                break;
              default:
                throw new Error(`Unexpected type ${ty}`);
            }
            // In JavaScript, await automatically also awaits any results of
            // awaits, so if an async function returns a future, it will await
            // the inner future too. This is not what we want so we
            // temporarily put it into a list to protect it.
            let wrapped = await_fut(fut);
            // complete case, get result / error and print it.
            try {
              let [value] = await wrapped;
              if (value !== undefined) {
                term.echo(
                  repr_shorten.callKwargs(value, {
                    separator: "\n[[;orange;]<long output truncated>]\n",
                  })
                );
              }
              if (pyodide.isPyProxy(value)) {
                value.destroy();
              }
            } catch (e) {
              if (e.constructor.name === "PythonError") {
                const message = fut.formatted_error || e.message;
                term.error(message.trimEnd());
              } else {
                throw e;
              }
            } finally {
              fut.destroy();
              wrapped.destroy();
            }
          }
          term.resume();
          await sleep(10);
          unlock();
        }

        let term = $("body").terminal(interpreter, {
          greetings: banner,
          prompt: ps1,
          completionEscape: false,
          completion: function (command, callback) {
            callback(pyconsole.complete(command).toJs()[0]);
          },
          keymap: {
            "CTRL+C": async function (event, original) {
              clear_console();
              term.enter();
              term.echo("KeyboardInterrupt");
              term.set_command("");
              term.set_prompt(ps1);
            },
            TAB: (event, original) => {
              const command = term.before_cursor();
              // Disable completion for whitespaces.
              if (command.trim() === "") {
                term.insert("\t");
                return false;
              }
              return original(event);
            },
          },
        });
        window.term = term;
        pyconsole.stdout_callback = (s) => term.echo(s, { newline: false });
        pyconsole.stderr_callback = (s) => {
          term.error(s.trimEnd());
        };
        term.ready = Promise.resolve();
        pyodide._api.on_fatal = async (e) => {
          term.error(
            "Pyodide has suffered a fatal error. Please report this to the Pyodide maintainers."
          );
          term.error("The cause of the fatal error was:");
          term.error(e);
          term.error("Look in the browser console for more details.");
          await term.ready;
          term.pause();
          await sleep(15);
          term.pause();
        };
      }
      window.console_ready = main();
    </script>
  </body>
</html>

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <script src="https://cdn.jsdelivr.net/npm/jquery"></script>
    <script src="https://cdn.jsdelivr.net/npm/jquery.terminal@2.32.0/js/jquery.terminal.min.js"></script>
    <link
      href="https://cdn.jsdelivr.net/npm/jquery.terminal@2.32.0/css/jquery.terminal.min.css"
      rel="stylesheet"
    />
    <script src="{{ PYODIDE_BASE_URL }}pyodide.js"></script>
    <style>
      .terminal {
        --size: 1.5;
        --color: rgba(255, 255, 255, 0.8);
      }
    </style>
  </head>
  <body>
    <script>
      "use strict";
      function sleep(s) {
        return new Promise((resolve) => setTimeout(resolve, s));
      }

      async function main() {
        globalThis.pyodide = await loadPyodide();
        let namespace = pyodide.globals.get("dict")();
        pyodide.runPython(
          `
            import sys
            from pyodide import to_js
            from pyodide.console import PyodideConsole, repr_shorten, BANNER
            import __main__
            BANNER = "Welcome to the Pyodide terminal emulator 🐍\\n" + BANNER
            pyconsole = PyodideConsole(__main__.__dict__)
            import builtins
            async def await_fut(fut):
              res = await fut
              if res is not None:
                builtins._ = res
              return to_js([res], depth=1)
            def clear_console():
              pyconsole.buffer = []
        `,
          namespace
        );
        let repr_shorten = namespace.get("repr_shorten");
        let banner = namespace.get("BANNER");
        let await_fut = namespace.get("await_fut");
        let pyconsole = namespace.get("pyconsole");
        let clear_console = namespace.get("clear_console");
        namespace.destroy();

        let ps1 = ">>> ",
          ps2 = "... ";

        async function lock() {
          let resolve;
          let ready = term.ready;
          term.ready = new Promise((res) => (resolve = res));
          await ready;
          return resolve;
        }

        async function interpreter(command) {
          let unlock = await lock();
          term.pause();
          // multiline should be split (useful when pasting)
          for (const c of command.split("\n")) {
            let fut = pyconsole.push(c);
            term.set_prompt(fut.syntax_check === "incomplete" ? ps2 : ps1);
            switch (fut.syntax_check) {
              case "syntax-error":
                term.error(fut.formatted_error.trimEnd());
                continue;
              case "incomplete":
                continue;
              case "complete":
                break;
              default:
                throw new Error(`Unexpected type ${ty}`);
            }
            // In JavaScript, await automatically also awaits any results of
            // awaits, so if an async function returns a future, it will await
            // the inner future too. This is not what we want so we
            // temporarily put it into a list to protect it.
            let wrapped = await_fut(fut);
            // complete case, get result / error and print it.
            try {
              let [value] = await wrapped;
              if (value !== undefined) {
                term.echo(
                  repr_shorten.callKwargs(value, {
                    separator: "\n[[;orange;]<long output truncated>]\n",
                  })
                );
              }
              if (pyodide.isPyProxy(value)) {
                value.destroy();
              }
            } catch (e) {
              if (e.constructor.name === "PythonError") {
                const message = fut.formatted_error || e.message;
                term.error(message.trimEnd());
              } else {
                throw e;
              }
            } finally {
              fut.destroy();
              wrapped.destroy();
            }
          }
          term.resume();
          await sleep(10);
          unlock();
        }

        let term = $("body").terminal(interpreter, {
          greetings: banner,
          prompt: ps1,
          completionEscape: false,
          completion: function (command, callback) {
            callback(pyconsole.complete(command).toJs()[0]);
          },
          keymap: {
            "CTRL+C": async function (event, original) {
              clear_console();
              term.enter();
              term.echo("KeyboardInterrupt");
              term.set_command("");
              term.set_prompt(ps1);
            },
            TAB: (event, original) => {
              const command = term.before_cursor();
              // Disable completion for whitespaces.
              if (command.trim() === "") {
                term.insert("\t");
                return false;
              }
              return original(event);
            },
          },
        });
        window.term = term;
        pyconsole.stdout_callback = (s) => term.echo(s, { newline: false });
        pyconsole.stderr_callback = (s) => {
          term.error(s.trimEnd());
        };
        term.ready = Promise.resolve();
        pyodide._api.on_fatal = async (e) => {
          term.error(
            "Pyodide has suffered a fatal error. Please report this to the Pyodide maintainers."
          );
          term.error("The cause of the fatal error was:");
          term.error(e);
          term.error("Look in the browser console for more details.");
          await term.ready;
          term.pause();
          await sleep(15);
          term.pause();
        };
      }
      window.console_ready = main();
    </script>
  </body>
</html>
