[ADD] runbot_merge: sentry integration

Might eventually extract / generalise, but for now it's simpler to
just do it in runbot_merge's post_load, that way there's no setup
change (just a small bit of configuration), and it's only enabled on
the instances runbot_merge is installed on.

fixes #97, closes #103

runbot_merge/__init__.py

@@ -1 +1,35 @@
+import logging
+from os import environ
+
+import sentry_sdk
+from sentry_sdk.integrations.logging import LoggingIntegration
+from sentry_sdk.integrations.wsgi import SentryWsgiMiddleware
+
+from odoo import http
 from . import models, controllers
+
+
+def enable_sentry():
+    logger = logging.getLogger('runbot_merge')
+
+    dsn = environ.get('SENTRY_DSN')
+    if not dsn:
+        logger.info("No DSN found, skipping sentry...")
+        return
+
+    try:
+        sentry_sdk.init(
+            dsn,
+            integrations=[
+                # note: if the colorformatter is enabled, sentry gets lost
+                # and classifies everything as errors because it fails to
+                # properly classify levels as the colorformatter injects
+                # the ANSI color codes right into LogRecord.levelname
+                LoggingIntegration(level=logging.INFO, event_level=logging.WARNING),
+            ]
+        )
+        http.root = SentryWsgiMiddleware(http.root)
+    except Exception:
+        logger.exception("DSN found, failed to enable sentry...")
+    else:
+        logger.info("DSN found, sentry enabled...")

runbot_merge/__manifest__.py

@@ -9,5 +9,6 @@
         'views/res_partner.xml',
         'views/mergebot.xml',
         'views/templates.xml',
-    ]
+    ],
+    'post_load': 'enable_sentry',
 }