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bug#31744: 26.1; Improvements to make tags and make -C test

From: Noam Postavsky
Subject: bug#31744: 26.1; Improvements to make tags and make -C test
Date: Sat, 09 Jun 2018 15:16:00 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

>> Oh, hmm.  The original reason, is that when looking at a source file in
>> Emacs, and then hitting M-. I get a prompt to visit the TAGS table,
>> which starts from the source directory.  Then I have to go looking for
>> the TAGS file in the corresponding build directory.
> I have grown a habit a long time ago to "M-x visit-tags-table" before
> I issue the first "M-." command.
> The default prompt is fine, because what else would you expect Emacs
> to do in that case?

Yeah, there's no way for Emacs to know where the build directory is.
Maybe I'll add symlinks locally to work around this.

>> especially since every build directory will have identical TAGS
>> files anyway
> That's what happens currently, but it isn't carved in stone.  We
> could, for example, have TAGS reflect only the files that are compiled
> in on the current platform; other projects (like GDB, for example) do
> just that.  Then each build will have a different TAGS file.

I hope not, that sounds inconvenient to me.

> No, I think the principle is that the source tree holds everything
> that comes with a release tarball.

Okay, I dropped this change, and updated the FIXME comment to mention
this instead.

Going back to a question from earlier in the thread:

>> +ifeq ($(TEST_INTERACTIVE), yes)
>> +    HOME=/nonexistent $(emacs) \
>> +      -l ert ${ert_opts} \
>> +      $(patsubst %,-l %,$(if $(findstring 
>> $(TEST_LOAD_EL),yes),$ELFILES,$(ELFILES:.el=)))  \
>> +      $(TEST_RUN_ERT)
>> +else
>>      address@hidden -k  ${LOGFILES}
>> -    @$(emacs) -l ert -f ert-summarize-tests-batch-and-exit ${LOGFILES}
>> +    @$(emacs) --batch -l ert -f ert-summarize-tests-batch-and-exit 
>> +endif

> Not sure I understand the HOME trick: why not use -Q?

$(emacs) already includes -Q (or rather, the equivalent long options
--no-init-file --no-site-file --no-site-lisp).  The HOME trick was added
in [d17aa3e535] and [412c38aa28].  I can't find a specific discussion,
but http://lists.gnu.org/archive/html/emacs-devel/2017-05/msg00641.html
seems related.  I've added a comment to explain this better.

[412c38aa28]: 2017-05-30 08:39:39 -0700
  Stop make check interacting with HOME
[d17aa3e535]: 2017-05-30 12:50:54 -0400
  Reduce scope of recent test/Makefile HOME change

Attachment: v2-0001-Make-tags-targets-respect-with-silent-rules-Bug-3.patch
Description: patch

Attachment: v2-0002-test-Makefile.in-Add-TEST_INTERACTIVE-option-Bug-.patch
Description: patch

Attachment: v2-0003-Reduce-quoting-for-SELECTOR-in-make-C-test-Bug-31.patch
Description: patch

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