xactfetch: Suppress asyncio InvalidStateError

There is currently a [bug][0] in the Python Playwright API that causes
_asyncio_ to raise an `InvalidStateError` occasionally when the
`PlaywrightContextManager` exits.  This causes the program to exit
with a nonzero return code, even though it actually completed
successfully, which will cause the Job to be retried.  To avoid this,
we can catch and ignore the spurious exception.

I've reorganized the code a bit here because we have to wrap the whole
`with` block in the `try`/`except`; moving the contents of the block
into a function keeps the indentation level from getting out of control.

[0]: https://github.com/microsoft/playwright-python/issues/2238

xactfetch.py

@@ -13,7 +13,7 @@ from types import TracebackType
 from typing import Any, Optional, Type
 
 import httpx
-from playwright.async_api import Page
+from playwright.async_api import Playwright, Page
 from playwright.async_api import async_playwright
 
 
@@ -702,10 +702,7 @@ class Chase:
         return secret.decode()
 
 
-async def amain() -> None:
-    logging.basicConfig(level=logging.DEBUG)
-    secrets = SecretsClient()
-    await secrets.connect()
+async def fetch_transactions(pw: Playwright, secrets: SecretsClient) -> bool:
     log.debug('Getting Firefly III access token')
     token = (await secrets.get_secret('firefly.token')).decode()
     import_secret = (
@@ -720,31 +717,40 @@ async def amain() -> None:
     )
     end_date = datetime.date.today() - datetime.timedelta(days=1)
     failed = False
-    async with async_playwright() as pw, secrets:
-        browser = await pw.chromium.launch(headless=False)
-        context = await browser.new_context()
-        await context.tracing.start(screenshots=True, snapshots=True)
-        page = await context.new_page()
-        banks = sys.argv[1:] or list(ACCOUNTS.keys())
-        if 'commerce' in banks:
-            if not await download_commerce(
-                page, secrets, end_date, token, importer
-            ):
-                failed = True
-        if 'chase' in banks:
-            if not await download_chase(
-                page, secrets, end_date, token, importer
-            ):
-                failed = True
-        if failed:
-            await context.tracing.stop(path='trace.zip')
-            with open('trace.zip', 'rb') as f:
-                await ntfy(
-                    'Downloading one or more transaction lists failed.',
-                    attach=f.read(),
-                    filename='trace.zip',
-                )
-    raise SystemExit(1 if failed else 0)
+    browser = await pw.chromium.launch(headless=False)
+    context = await browser.new_context()
+    await context.tracing.start(screenshots=True, snapshots=True)
+    page = await context.new_page()
+    banks = sys.argv[1:] or list(ACCOUNTS.keys())
+    if 'commerce' in banks:
+        if not await download_commerce(
+            page, secrets, end_date, token, importer
+        ):
+            failed = True
+    if 'chase' in banks:
+        if not await download_chase(page, secrets, end_date, token, importer):
+            failed = True
+    if failed:
+        await context.tracing.stop(path='trace.zip')
+        with open('trace.zip', 'rb') as f:
+            await ntfy(
+                'Downloading one or more transaction lists failed.',
+                attach=f.read(),
+                filename='trace.zip',
+            )
+    return failed
+
+
+async def amain() -> None:
+    logging.basicConfig(level=logging.DEBUG)
+
+    async with SecretsClient() as secrets:
+        try:
+            async with async_playwright() as pw:
+                failed = await fetch_transactions(pw, secrets)
+            raise SystemExit(1 if failed else 0)
+        except asyncio.exceptions.InvalidStateError:
+            log.debug('Ignoring exception: %s', exc_info=sys.exc_info())
 
 
 def main():