change: report unhandled tracebacks to a repository

As repeats of these traceback notifications were annoying some of
the devops staff, and it took coordination to share tracebacks with
developers, this commit removes that responsibility off of devops
by reporting tracebacks to Gitlab repositories in the form of issues.

- removed ServerErrorNotification
- removed notifications.postmaster configuration option
- added notifications.gitlab-instance option
- added notifications.error-project option
- added notifications.error-token option
- added aurweb.exceptions.handle_form_exceptions, a POST route decorator

Issues are filed confidentially. This change will need updates
in infrastructure's ansible configuration before this can be
applied to aur.archlinux.org.

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/routers/pkgbase.py

@@ -6,7 +6,7 @@ from sqlalchemy import and_
 
 from aurweb import config, db, l10n, logging, templates, time, util
 from aurweb.auth import creds, requires_auth
-from aurweb.exceptions import InvariantError, ValidationError
+from aurweb.exceptions import InvariantError, ValidationError, handle_form_exceptions
 from aurweb.models import PackageBase
 from aurweb.models.package_comment import PackageComment
 from aurweb.models.package_keyword import PackageKeyword
@@ -88,6 +88,7 @@ async def pkgbase_flag_comment(request: Request, name: str):
 
 
 @router.post("/pkgbase/{name}/keywords")
+@handle_form_exceptions
 async def pkgbase_keywords(request: Request, name: str,
                            keywords: str = Form(default=str())):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -130,6 +131,7 @@ async def pkgbase_flag_get(request: Request, name: str):
 
 
 @router.post("/pkgbase/{name}/flag")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_flag_post(request: Request, name: str,
                             comments: str = Form(default=str())):
@@ -158,6 +160,7 @@ async def pkgbase_flag_post(request: Request, name: str,
 
 
 @router.post("/pkgbase/{name}/comments")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comments_post(
         request: Request, name: str,
@@ -254,6 +257,7 @@ async def pkgbase_comment_edit(request: Request, name: str, id: int,
 
 
 @router.post("/pkgbase/{name}/comments/{id}")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comment_post(
         request: Request, name: str, id: int,
@@ -294,6 +298,7 @@ async def pkgbase_comment_post(
 
 
 @router.post("/pkgbase/{name}/comments/{id}/pin")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comment_pin(request: Request, name: str, id: int,
                               next: str = Form(default=None)):
@@ -328,6 +333,7 @@ async def pkgbase_comment_pin(request: Request, name: str, id: int,
 
 
 @router.post("/pkgbase/{name}/comments/{id}/unpin")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comment_unpin(request: Request, name: str, id: int,
                                 next: str = Form(default=None)):
@@ -361,6 +367,7 @@ async def pkgbase_comment_unpin(request: Request, name: str, id: int,
 
 
 @router.post("/pkgbase/{name}/comments/{id}/delete")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comment_delete(request: Request, name: str, id: int,
                                  next: str = Form(default=None)):
@@ -400,6 +407,7 @@ async def pkgbase_comment_delete(request: Request, name: str, id: int,
 
 
 @router.post("/pkgbase/{name}/comments/{id}/undelete")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comment_undelete(request: Request, name: str, id: int,
                                    next: str = Form(default=None)):
@@ -438,6 +446,7 @@ async def pkgbase_comment_undelete(request: Request, name: str, id: int,
 
 
 @router.post("/pkgbase/{name}/vote")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_vote(request: Request, name: str):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -462,6 +471,7 @@ async def pkgbase_vote(request: Request, name: str):
 
 
 @router.post("/pkgbase/{name}/unvote")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_unvote(request: Request, name: str):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -482,6 +492,7 @@ async def pkgbase_unvote(request: Request, name: str):
 
 
 @router.post("/pkgbase/{name}/notify")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_notify(request: Request, name: str):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -491,6 +502,7 @@ async def pkgbase_notify(request: Request, name: str):
 
 
 @router.post("/pkgbase/{name}/unnotify")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_unnotify(request: Request, name: str):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -500,6 +512,7 @@ async def pkgbase_unnotify(request: Request, name: str):
 
 
 @router.post("/pkgbase/{name}/unflag")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_unflag(request: Request, name: str):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -527,6 +540,7 @@ async def pkgbase_disown_get(request: Request, name: str,
 
 
 @router.post("/pkgbase/{name}/disown")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_disown_post(request: Request, name: str,
                               comments: str = Form(default=str()),
@@ -565,6 +579,7 @@ async def pkgbase_disown_post(request: Request, name: str,
 
 
 @router.post("/pkgbase/{name}/adopt")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_adopt_post(request: Request, name: str):
     pkgbase = get_pkg_or_base(name, PackageBase)
@@ -607,6 +622,7 @@ async def pkgbase_comaintainers(request: Request, name: str) -> Response:
 
 
 @router.post("/pkgbase/{name}/comaintainers")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_comaintainers_post(request: Request, name: str,
                                      users: str = Form(default=str())) \
@@ -660,6 +676,7 @@ async def pkgbase_request(request: Request, name: str,
 
 
 @router.post("/pkgbase/{name}/request")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_request_post(request: Request, name: str,
                                type: str = Form(...),
@@ -755,6 +772,7 @@ async def pkgbase_delete_get(request: Request, name: str,
 
 
 @router.post("/pkgbase/{name}/delete")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_delete_post(request: Request, name: str,
                               confirm: bool = Form(default=False),
@@ -819,6 +837,7 @@ async def pkgbase_merge_get(request: Request, name: str,
 
 
 @router.post("/pkgbase/{name}/merge")
+@handle_form_exceptions
 @requires_auth
 async def pkgbase_merge_post(request: Request, name: str,
                              into: str = Form(default=str()),