Bug: Attempt to install notmuch-emacs.info during --without-emacs build

[David Bremner]

Ralph Seichter <abbot at monksofcool.net> writes:

> * David Bremner:
>
>> The following seems to fix the problem, but I haven't tested it
>> extensively.
>
> As shown in https://monksofcool.net/tmp/6bmjUFL.log , your suggestion
> results in notmuch-emacs.info being generated but unfortunately not
> installed when Notmuch is built --with-emacs. Obviously that's better
> than a build failure for --without-emacs, but it is not quite ideal
> either. ;-)
>

Attempt #2; we need to delay expansion of INFO_TEXI_FILES until
WITH_EMACS is defined.

diff --git a/doc/Makefile.local b/doc/Makefile.local
index 719172fe..5b99dd02 100644
--- a/doc/Makefile.local
+++ b/doc/Makefile.local
@@ -28,7 +28,9 @@ MAN_GZIP_FILES := $(addsuffix .gz,${MAN_ROFF_FILES})
 MAN1_TEXI := $(patsubst $(srcdir)/doc/man1/%.rst,$(DOCBUILDDIR)/texinfo/%.texi,$(MAN1_RST))
 MAN5_TEXI := $(patsubst $(srcdir)/doc/man5/%.rst,$(DOCBUILDDIR)/texinfo/%.texi,$(MAN5_RST))
 MAN7_TEXI := $(patsubst $(srcdir)/doc/man7/%.rst,$(DOCBUILDDIR)/texinfo/%.texi,$(MAN7_RST))
-INFO_TEXI_FILES := $(MAN1_TEXI) $(MAN5_TEXI) $(MAN7_TEXI) $(DOCBUILDDIR)/texinfo/notmuch-emacs.texi
+INFO_TEXI_FILES = $(MAN1_TEXI) $(MAN5_TEXI) $(MAN7_TEXI) \
+       $(if $(filter 1,$(WITH_EMACS)), $(DOCBUILDDIR)/texinfo/notmuch-emacs.texi,)
+
 INFO_INFO_FILES := $(INFO_TEXI_FILES:.texi=.info)
 
 .PHONY: sphinx-html sphinx-texinfo sphinx-info