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Use Promise.all to fetch files part of py-config (#1322)

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This is a first step towards loading more stuff simultaneously rather
than sequentially.

The functional part of this is pretty small: call `calculateFetchPaths` and
then `Promise.all(fetchPaths.map(loadFileFromURL));`. I also transposed the
return type of `calculateFetchPaths` since it's more convenient to consume
this way.

I redid the logic in `calculateFetchPaths` a bit. I renamed `src/plugins/fetch.ts`
to `calculateFetchPaths.ts` since the file performs no fetching. I also
renamed `loadFromFile` to `loadFileFromURL`.
This commit is contained in:
Hood Chatham
2023-03-29 07:32:09 -07:00
committed by GitHub
parent 26f07246e1
commit 9fedfe3699
6 changed files with 80 additions and 85 deletions
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12
pyscriptjs/src/remote_interpreter.ts
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@@ -226,11 +226,11 @@ export class RemoteInterpreter extends Object {
/**
*
* @param path : the path in the filesystem
* @param fetch_path : the path to be fetched
* @param url : the url to be fetched
*
* Given a file available at `fetch_path` URL (eg:
* `http://dummy.com/hi.py`), the function downloads the file and saves it
* to the `path` (eg: `a/b/c/foo.py`) on the FS.
* Given a file available at `url` URL (eg: `http://dummy.com/hi.py`), the
* function downloads the file and saves it to the `path` (eg:
* `a/b/c/foo.py`) on the FS.
*
* Example usage: await loadFromFile(`a/b/c/foo.py`,
* `http://dummy.com/hi.py`)
@@ -246,13 +246,13 @@ export class RemoteInterpreter extends Object {
* in `/home/pyodide/a/b.py`, `../a/b.py` will be placed into `/home/a/b.py`
* and `/a/b.py` will be placed into `/a/b.py`.
*/
async loadFromFile(path: string, fetch_path: string): Promise<void> {
async loadFileFromURL(path: string, url: string): Promise<void> {
path = this.PATH_FS.resolve(path);
const dir: string = this.PATH.dirname(path);
this.FS.mkdirTree(dir);
// `robustFetch` checks for failures in getting a response
const response = await robustFetch(fetch_path);
const response = await robustFetch(url);
const buffer = await response.arrayBuffer();
const data = new Uint8Array(buffer);