Re: notmuch is limited to a single local mail store, right?

[myglc2 <myglc2@gmail.com>]

Peter Münster <pmlists@free.fr> writes:

> On Fri, Jan 15 2016, myglc2 wrote:
>
>> notmuch does not support making more than one index.
>
> What about:
> NOTMUCH_CONFIG=here  notmuch
> NOTMUCH_CONFIG=there notmuch
> ?

asjo@koldfront.dk (Adam Sjøgren) writes:

> On Fri, Jan 15 2016, myglc2 wrote:
>
>> notmuch does not support making more than one index.
>
> I think you are overinterpreting in this statement.

OOPS! Hey, many thanks for straightening me out on this.

So... I tried passing notmuch config in as a switch like so ...

;; notmuch on 2nd test maildir folder
  (add-to-list 'gnus-secondary-select-methods
	       '(nnmaildir "foobar.2"
			   (directory "~/Maildir/foobar.2")
			   (nnir-search-engine notmuch)
			   (nnir-notmuch-remove-prefix
			    "/home/glc/Maildir/foobar.2/")
			   (nnir-notmuch-additional-switches
			    '("--config=/home/glc/.notmuch-config.2")
			    )
			   )
	       )

... and discovered two issues. When I followed the help setting the
switches ...

  ;; nnir-notmuch-additional-switches is a variable defined in ‘nnir.el’.
  ;; Its value is nil
  ;;
  ;; Documentation:
  ;; *A list of strings, to be given as additional arguments to notmuch.
  ;;
  ;; Note that this should be a list.  I.e., do NOT use the following:
  ;;     (setq nnir-notmuch-additional-switches "-i -w") ; wrong
  ;; Instead, use this:
  ;;     (setq nnir-notmuch-additional-switches '("-i" "-w"))

... there was a spurious 'quote( )' passed to notmuch. So ... I removed
the leading quote, and the argument list shown in the message buffer
looked better. So maybe the help should be changed to read ...

  ;; Instead, use this:
  ;;     (setq nnir-notmuch-additional-switches ("-i" "-w"))

However, The order in which the additional switches are passed ...


notmuch args: search --format=text --output=files --config=/home/glc/.notmuch-config.2 olivia
Massaging notmuch output...done
Search produced empty results.

... and as constructed by this nnir.el code ...

      (let* ((cp-list `( ,nnir-notmuch-program
                         nil            ; input from /dev/null
                         t              ; output
                         nil            ; don't redisplay
                         "search"
                         "--format=text"
                         "--output=files"
                         ,@(nnir-read-server-parm 'nnir-notmuch-additional-switches server)
                         ,qstring       ; the query, in notmuch format
                         ))

... made notmuch unhappy. So I 'fixed' nnir-run-notmuch by changing the
order ...

      (let* ((cp-list `( ,nnir-notmuch-program
                         nil            ; input from /dev/null
                         t              ; output
                         nil            ; don't redisplay
                         ,@(nnir-read-server-parm 'nnir-notmuch-additional-switches server)
                         "search"
                         "--format=text"
                         "--output=files"
                         ,qstring       ; the query, in notmuch format
                         ))

... which made notmuch happy ...

notmuch args: --config=/home/glc/.notmuch-config.2 search --format=text
--output=files olivia Massaging notmuch output...done

So... Bottom line, a gnus config like this ...

;; notmuch on 2nd test maildir folder
  (add-to-list 'gnus-secondary-select-methods
	       '(nnmaildir "foobar.2"
			   (directory "~/Maildir/foobar.2")
			   (nnir-search-engine notmuch)
			   (nnir-notmuch-program "notmuch")
			   (nnir-notmuch-remove-prefix
			    "/home/glc/Maildir/foobar.2/")
			   (nnir-notmuch-additional-switches
			    ("--config=/home/glc/.notmuch-config.2")
			    )
			   )
	       )

... with the minor change to nnir.el shown above, allows multiple
notmuch indexes.

BTW, I also tried the 'NOTMUCH_CONFIG=here notmuch' scheme suggested by
Peter hoping it might not require any code changes. I tried this ...

  ;; notmuch on 3rdd test maildir folder
  (add-to-list 'gnus-secondary-select-methods
  	       '(nnmaildir "foobar.3"
  			   (directory "~/Maildir/foobar.3")
  			   (nnir-search-engine notmuch)
			   ;; Note: this fails because 'call-process'
			   ;; punts on the environmental var
  			   (nnir-notmuch-program
			    "NOTMUCH_CONFIG=${HOME}/.notmuch-config.3 notmuch")
  			   (nnir-notmuch-remove-prefix
  			    "/home/glc/Maildir/foobar.3/")
  			   )
  	       )

But I discovered that a global value of nnir-notmuch-program is used by
nnir-run-notmuch. I did a little hack to pick up the server-specific
value like so ...

      (let* ((cp-list `(,(nnir-read-server-parm 'nnir-notmuch-program server)
                         nil            ; input from /dev/null
                         t              ; output
                         nil            ; don't redisplay
                         ,@(nnir-read-server-parm 'nnir-notmuch-additional-switches server)
                         "search"
                         "--format=text"
                         "--output=files"
                         ,qstring       ; the query, in notmuch format
                         ))

... but then ...

                (apply 'call-process cp-list))))

... produced this error ...

c-append-to-state-cache: Searching for program: No such file or
directory, NOTMUCH_CONFIG=${HOME}/.notmuch-config.3 notmuch

So... how do one pass an environmental from an init file into a process?

Many thanks, - George