From: Junio C Hamano <gitster@pobox.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH] Makefile: add QUIET_GEN to "tags" and "TAGS" targets
Date: Sat, 27 Mar 2021 22:56:28 -0700 [thread overview]
Message-ID: <xmqqpmzjom7n.fsf@gitster.g> (raw)
In-Reply-To: <patch-1.1-afd0c18ca86-20210328T021814Z-avarab@gmail.com> ("Ævar Arnfjörð Bjarmason"'s message of "Sun, 28 Mar 2021 04:18:34 +0200")
Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
> Don't show the very verbose $(FIND_SOURCE_FILES) command on every
> "make TAGS" invocation. Let's also use the "cmd >x+ && mv x+ x"
> pattern here so we don't momentarily clobber the file.
We do not "redirect" ctags and etags output into x+.
Let's use "generate into temporary and rename to the final
after seeing the command that generated the output finished
successfully" pattern.
Please also correct the explanation of why it is a good idea to use
the pattern in this case. It is not about avoiding momentarily
clobbering the output. It is to avoid leaving an incorrect output
generated by a failed command in the file with the filename that
consumers expect.
Thanks for making our Makefile a bit less noisy. Anybody who makes
"clean" and its friends quiet will get a gold star ;-)
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
> Makefile | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 55c8035fa80..f317af1b602 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -2690,12 +2690,15 @@ FIND_SOURCE_FILES = ( \
> )
>
> $(ETAGS_TARGET): FORCE
> - $(RM) $(ETAGS_TARGET)
> - $(FIND_SOURCE_FILES) | xargs etags -a -o $(ETAGS_TARGET)
> + echo $(ALL_SOURCE_FILES)
> + $(QUIET_GEN)$(RM) "$(ETAGS_TARGET)+" && \
> + $(FIND_SOURCE_FILES) | xargs etags -a -o "$(ETAGS_TARGET)+" && \
> + mv "$(ETAGS_TARGET)+" "$(ETAGS_TARGET)"
>
> tags: FORCE
> - $(RM) tags
> - $(FIND_SOURCE_FILES) | xargs ctags -a
> + $(QUIET_GEN)$(RM) tags+ && \
> + $(FIND_SOURCE_FILES) | xargs ctags -a -o tags+ && \
> + mv tags+ tags
>
> cscope:
> $(RM) cscope*
next prev parent reply other threads:[~2021-03-28 5:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-28 2:18 [PATCH] Makefile: add QUIET_GEN to "tags" and "TAGS" targets Ævar Arnfjörð Bjarmason
2021-03-28 5:56 ` Junio C Hamano [this message]
2021-03-31 21:20 ` Junio C Hamano
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