Use a URL https://notmuchmail.org/doc/latest to leave room for a
future more ambitious scheme deploying multiple versions.
This also forces the html docs to built as part of the release
process. In the future this should be updated to tolerate generating a
release without sphinx installed. This needs a new target analogous to
build-info and build-man that does nothing if sphinx is not installed.
Inspired by the suggestion of
id:20200727154108.16269-3-congdanhqx@gmail.com
to drop the configuration test for the default backend. This version
is hopefully robust against backend changes.
This is similar to the case of toplevel messages. Currently everything
is cached, so no database access is necessary. This might change in
the future, but it should not crash in either case.
static_cast is a bit tricky to understand and error prone, so add a
second pointer to (potentially the same) Xapian database object that
we know has the right subclass.
I'm not sure what the point of modifying that right before destroying
the object is. In a future commit I want to remove that element of the
object, so simplify that task.
The goal of this abstraction was to save space. But that failed as
the result actually was that four trivial lines got replace with 15
fairly complicated lines. The opposite of what it was supposed to
do.
Also it made it harder to come up with the fix in the previous commit;
simply grepping for the relevant symbols did not work because they get
constructed at run-time instead of appearing in the source file.
Starting with Emacs 27 undeclared variables in evaluated interactive
code uses lexical scope. This includes code passed with '--eval' as
we do in the Emacs tests, which also happen to assume dynamic scope.
- This can affect variables defined by libraries that we use. We
let-bind such variables to change the behavior of functions which we
then call with these bindings in effect. If these libraries are not
loaded beforehand, then the bindings are lexical and fail to have
the effect we intended.
At this time only 'smtpmail' has to be loaded explicitly (for the
variables let-bound in emacs_deliver_message and emacs_fcc_message).
'message' doesn't have to be loaded explicitly, because loading
'notmuch' (in 'run_emacs') already takes care of that, indirectly.
- Our own testing-only variables also have to be declared explicitly.
We should have done that anyway, but because of how and where these
variables are used it was very easy to overlook that (i.e. it isn't
something the byte-compiler ever looks at). Not so in Emacs 27
anymore; here this oversight caused four tests to fail.
The numeric values of these variables get incremented by functions
that we add to hooks that are run by many tests, not just the tests
where we actually inspect the value and therefore take care to let-
bind the values to 0 before we begin. The global values therefore
have to be numeric values as well. I have chosen -100 instead of 0
as the default in case someone writes a test that inspects the value
but forgets to let-bind the value. I hope that the unusual negative
value that one is going to see in such a case will help debugging
the issue.
