Taylan Kammer <taylan.kammer@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 16364) by debbugs.gnu.org; 17 May 2021 22:31:47 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon May 17 18:31:47 2021 Received: from localhost ([127.0.0.1]:53994 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1lilm6-0003pJ-KB for submit <at> debbugs.gnu.org; Mon, 17 May 2021 18:31:47 -0400 Received: from mail-ed1-f44.google.com ([209.85.208.44]:37377) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <taylan.kammer@HIDDEN>) id 1lilm4-0003p5-2I for 16364 <at> debbugs.gnu.org; Mon, 17 May 2021 18:31:46 -0400 Received: by mail-ed1-f44.google.com with SMTP id f1so8739838edt.4 for <16364 <at> debbugs.gnu.org>; Mon, 17 May 2021 15:31:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-language; bh=a3flnYGeeSu9IvzFzY2rbidPEBmXTvJo0GI1mFvFjLE=; b=WnvKLctBrStUJRP4+ePbWYWJaQVVjdtPhPsl+MoBSr7bF+DJhyVJWuZe8/6il7ZNyY arZz6dsbBgNXhTuKqMuCQ6baDGb8d8eeHR8kxwAEYmxTj30xkJz5EYgV5UBlMMn52C0Q uuZycVLxmq7wKdpXdqL4ZvkNBFLvByxaD39On0Qh0mFxC3KbHkHuhQLfioccMN2/yLHT jyJiFkP+L/tHNjDXPLUlct9y/Wp1mFWhBvFC9+MujwkO2pZZy3ZTWVD3fM+7pAg7McyU z5zx1CgTOxcdDdMEpOB5Gy/fg6prkW6Tvhx6mnCD9/Twtx1TAcQNLhDZ4HWoNFVM2FU3 Mung== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-language; bh=a3flnYGeeSu9IvzFzY2rbidPEBmXTvJo0GI1mFvFjLE=; b=Ckb1HLVfZU3zT2px/P2edkmoiWzJZJ0vNIbyRRtKXQYYr1eTi5hjIWpqAjK5Q1AZyq p2m6RoNWBP7E1iwLuP7MAZfV4WvtDgMFYS9E4Kbbh+gQXV/SBx/v/Yw6ZYpyyfqPm+NB iMzIpdcoR7GWjn3BeERGuU/p4W2rV8S4sJfYEcpFnk+Af8hoZdJBkIbfSELFxhSUrLWI B8SARAI/w3YcaKwxkn/44LDiQgwji0z4ij10LU49FlOJCpZEea9Psz0Rem4/wQUkPByt Md8kXF9qmjDKFmdoz2JwGXMyOf+Gd5B8/SDeshSHOK6WVQw8C/+v0PWOsNB5TU2iA02j LTZA== X-Gm-Message-State: AOAM532pPNBACIGuGqmn6M7VlhPWk5EKrngBekmUiUlATrYaTDcLFZfZ CLzw20+hb90wbRX492m/Zd4= X-Google-Smtp-Source: ABdhPJz7twaxtKAK/p3B3C6xIImTcO01BideQqitihiOC9DJu9YwxkISi2JxYZ/5psMFQ4pPtHCv3A== X-Received: by 2002:a50:9e63:: with SMTP id z90mr2837500ede.342.1621290698209; Mon, 17 May 2021 15:31:38 -0700 (PDT) Received: from [192.168.178.20] (b2b-109-90-125-150.unitymedia.biz. [109.90.125.150]) by smtp.gmail.com with ESMTPSA id z9sm11396351edb.51.2021.05.17.15.31.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 May 2021 15:31:37 -0700 (PDT) To: 16364 <at> debbugs.gnu.org, Zefram <zefram@HIDDEN> From: Taylan Kammer <taylan.kammer@HIDDEN> Subject: auto-compile noise can't be avoided by script Message-ID: <dfffb321-6be5-c2c8-bd54-dd9fee18ecb3@HIDDEN> Date: Tue, 18 May 2021 00:31:36 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------02D9CD278B57C978507F003C" Content-Language: en-US X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 16364 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) This is a multi-part message in MIME format. --------------02D9CD278B57C978507F003C Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Attached is a patch that adds a command-line switch --silence-auto-compile which disables all diagnostics about auto-compilation except when the auto-compilation of a file fails. This can be used the following way in a script: #!/usr/bin/guile \ --silence-auto-compile --any --other --switches -s !# See: https://www.gnu.org/software/guile/manual/html_node/The-Meta-Switch.html -- Taylan --------------02D9CD278B57C978507F003C Content-Type: text/plain; charset=UTF-8; name="0001-Add-command-line-switch-silence-auto-compile.patch" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="0001-Add-command-line-switch-silence-auto-compile.patch" RnJvbSBmMDBmZDAwMGEwNTgwMWZhOGY1N2UwNmM2ODAzZWEwMTQyMmM0MTliIE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBUYXlsYW4gS2FtbWVyIDx0YXlsYW4ua2FtbWVyQGdt YWlsLmNvbT4KRGF0ZTogVHVlLCAxOCBNYXkgMjAyMSAwMDoyMTo1NCArMDIwMApTdWJqZWN0 OiBbUEFUQ0hdIEFkZCBjb21tYW5kLWxpbmUgc3dpdGNoIC0tc2lsZW5jZS1hdXRvLWNvbXBp bGUuCgoqIGxpYmd1aWxlL2xvYWQuYzogRGVmaW5lIGFuZCBvYmV5IG5ldyB2YXJpYWJsZSAl c2lsZW5jZS1hdXRvLWNvbXBpbGUuCiogbW9kdWxlL2ljZS05L2Jvb3QtOS5zY20gKGxvYWQt aW4tdmljaW5pdHkpOiBPYmV5ICVzaWxlbmNlLWF1dG8tY29tcGlsZS4KKiBtb2R1bGUvaWNl 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bug-guile@HIDDEN:bug#16364; Package guile.
Full text available.Received: (at 16364) by debbugs.gnu.org; 17 Jan 2014 21:56:17 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Jan 17 16:56:17 2014 Received: from localhost ([127.0.0.1]:55599 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1W4HOi-0004xm-Rm for submit <at> debbugs.gnu.org; Fri, 17 Jan 2014 16:56:17 -0500 Received: from river.fysh.org ([5.135.154.127]:34418) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <zefram@HIDDEN>) id 1W4HOf-0004xc-C7 for 16364 <at> debbugs.gnu.org; Fri, 17 Jan 2014 16:56:14 -0500 Received: from zefram by river.fysh.org with local (Exim 4.80 #2 (Debian)) id 1W4HOb-0008RN-Ju; Fri, 17 Jan 2014 21:56:09 +0000 Date: Fri, 17 Jan 2014 21:56:09 +0000 From: Zefram <zefram@HIDDEN> To: Ludovic Courtes <ludo@HIDDEN> Subject: Re: bug#16364: auto-compile noise can't be avoided by script Message-ID: <20140117215609.GH21945@HIDDEN> References: <20140105234106.GI30283@HIDDEN> <87fvomuwfw.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87fvomuwfw.fsf@HIDDEN> X-Spam-Score: -0.3 (/) X-Debbugs-Envelope-To: 16364 Cc: 16364 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.3 (/) Ludovic Courtes wrote: >However, you can set the environment variable GUILE_AUTO_COMPILE=0. > >Do you think that would solve the problem? It does not solve the problem. Firstly, it can't be done from the #! line at all, so the script can't do it early enough. It only works if it's already been set by the user, which is no good for what should be an internal detail of the program. Secondly, it suffers the second problem that I noted with --no-auto-compile: if there's already a cached compilation then that'll be looked at, and if it's out of date then a "newer than" banner is emitted. With the environment variable set the cached version will never be updated, nor will it be deleted, so the banner then appears on every execution. -zefram
bug-guile@HIDDEN:bug#16364; Package guile.
Full text available.Received: (at 16364) by debbugs.gnu.org; 17 Jan 2014 21:31:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Jan 17 16:31:53 2014 Received: from localhost ([127.0.0.1]:55589 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1W4H16-0004E9-I7 for submit <at> debbugs.gnu.org; Fri, 17 Jan 2014 16:31:52 -0500 Received: from hera.aquilenet.fr ([141.255.128.1]:34994) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <ludo@HIDDEN>) id 1W4H14-0004Ds-4r for 16364 <at> debbugs.gnu.org; Fri, 17 Jan 2014 16:31:51 -0500 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 39A6D1B58; Fri, 17 Jan 2014 22:31:48 +0100 (CET) Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Kfv+S7lMK1bD; Fri, 17 Jan 2014 22:31:48 +0100 (CET) Received: from pluto (reverse-83.fdn.fr [80.67.176.83]) by hera.aquilenet.fr (Postfix) with ESMTPSA id D9E90A49; Fri, 17 Jan 2014 22:31:47 +0100 (CET) From: ludo@HIDDEN (Ludovic =?utf-8?Q?Court=C3=A8s?=) To: Zefram <zefram@HIDDEN> Subject: Re: bug#16364: auto-compile noise can't be avoided by script References: <20140105234106.GI30283@HIDDEN> Date: Fri, 17 Jan 2014 22:31:47 +0100 In-Reply-To: <20140105234106.GI30283@HIDDEN> (zefram@HIDDEN's message of "Sun, 5 Jan 2014 23:41:06 +0000") Message-ID: <87fvomuwfw.fsf@HIDDEN> User-Agent: Gnus/5.130007 (Ma Gnus v0.7) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 1.0 (+) X-Debbugs-Envelope-To: 16364 Cc: 16364 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 1.0 (+) Zefram <zefram@HIDDEN> skribis: > I can turn off the auto-compilation from within the script by using the > --no-auto-compile option, but that breaks compatibility to 1.8: However, you can set the environment variable GUILE_AUTO_COMPILE=3D0. Do you think that would solve the problem? Thanks, Ludo=E2=80=99.
bug-guile@HIDDEN:bug#16364; Package guile.
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Date: Sun, 5 Jan 2014 23:41:06 +0000
From: Zefram <zefram@HIDDEN>
To: bug-guile@HIDDEN
Subject: auto-compile noise can't be avoided by script
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Guile 2.0.9 has a facility to automatically cache a compiled version
of any Scheme source file that it loads, and it wants the world to
know about it! If auto-compilation is enabled, which it is by default,
then when guile loads a file (that was not already compiled) it emits a
banner describing the auto-compilation. This interferes with the proper
functionality of any program written as a guile script, by producing
output that the program did not intend. Working around this is tricky
(discussed below). There's no straightforward way for a script to avoid
the noise while being portable between guile versions 1.8 and 2.0.
There's also no way to avoid the noise while actually getting the
auto-compilation behaviour.
In my particular case, my script makes interesting use of the
read-eval (#.) feature, which means that the compilation process
actually can't work. This means that *every* time the script is run,
not just the first time, guile emits the banner about auto-compilation,
followed by a rather misleading warning/error about compilation failure.
It's misleading because it then goes on to execute the script just fine.
I can demonstrate this with a minimal test case (using read-eval in an
uninteresting way, just making the compiler barf by not having applied
eval-when to enable it):
$ cat t0
#!/usr/bin/guile -s
!#
(fluid-set! read-eval? #t)
(display #."hello world")
(newline)
$ guile-1.8 -s t0
hello world
$ guile-2.0 -s t0
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;; or pass the --no-auto-compile argument to disable.
;;; compiling /home/zefram/usr/guile/t0
;;; WARNING: compilation of /home/zefram/usr/guile/t0 failed:
;;; ERROR: #. read expansion found and read-eval? is #f.
hello world
$
I can turn off the auto-compilation from within the script by using the
--no-auto-compile option, but that breaks compatibility to 1.8:
$ cat t1
#!/usr/bin/guile \
--no-auto-compile -s
!#
(fluid-set! read-eval? #t)
(display #."hello world")
(newline)
$ guile-2.0 '\' t1
hello world
$ guile-1.8 '\' t1
guile-1.8: Unrecognized switch `--no-auto-compile'
Usage: guile-1.8 OPTION ...
Evaluate Scheme code, interactively or from a script.
...
Aside from the portability concern, turning off auto-compilation doesn't
actually fix the problem. If a compiled version has previously been
cached for the filename of a script being run, guile will consider
using the cached version even if --no-auto-compile was supplied: the
switch only controls the attempt to compile for the cache. If the
cached compilation is up to date then it is used silently, which is OK.
But if it's out of date, because the cache was for a different script
that previously existed under the same name, then guile emits a banner
saying that it's out of date (implying that the cached compilation is
therefore not being used). So the script's visible behaviour is defiled
even if it applies the option.
Observe what happens to the second script in this sequence:
$ echo '(display "hello world\n")' >t10
$ guile-2.0 t10
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;; or pass the --no-auto-compile argument to disable.
;;; compiling /home/zefram/usr/guile/t10
;;; compiled /home/zefram/.cache/guile/ccache/2.0-LE-8-2.0/home/zefram/usr/guile/t10.go
hello world
$ echo '(display "goodbye world\n")' >t10
$ guile-2.0 --no-auto-compile t10
;;; note: source file /home/zefram/usr/guile/t10
;;; newer than compiled /home/zefram/.cache/guile/ccache/2.0-LE-8-2.0/home/zefram/usr/guile/t10.go
goodbye world
I have, however, come up with a truly ugly workaround. The meta option
system can be used to introduce a -c option that explicitly loads the
script file via primitive-eval, which does not attempt compilation.
(Nor does it look at the compilation cache, so this even avoids the
problem that --no-auto-compile runs into.) Running the script this way
yields a different command line (visible through (program-arguments))
from that which arrives when the script is run via -s, so if the script
is to process its command line, for robustness it must pay attention to
which way it was invoked. All together, this looks like:
$ cat t11
#!/usr/bin/guile \
-c (begin\
\ \ \ (define\ arg-hack\ #t)\
\ \ \ (primitive-load\ (cadr\ (program-arguments))))
!#
(define argv
(if (false-if-exception arg-hack)
(cdr (program-arguments))
(program-arguments)))
(write argv)
(newline)
$ guile-1.6 '\' t11 a b c
("t11" "a" "b" "c")
$ guile-1.6 -s t11 a b c
("t11" "a" "b" "c")
$ guile-1.8 '\' t11 a b c
("t11" "a" "b" "c")
$ guile-1.8 -s t11 a b c
("t11" "a" "b" "c")
$ guile-2.0 '\' t11 a b c
("t11" "a" "b" "c")
$ guile-2.0 -s t11 a b c
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;; or pass the --no-auto-compile argument to disable.
;;; compiling /home/zefram/usr/guile/t11
;;; /home/zefram/usr/guile/t11:7:6: warning: possibly unbound variable `arg-hack'
;;; compiled /home/zefram/.cache/guile/ccache/2.0-LE-8-2.0/home/zefram/usr/guile/t11.go
("t11" "a" "b" "c")
$ guile-2.0 -s t11 a b c
("t11" "a" "b" "c")
I'm not comfortable with this as a workaround. It smells fragile.
Also note that though this does avoid the banner appearing for
#!-based executions, it's not muffling the banner per se but actually
preventing compilation. While for some programs it's desirable to
prevent compilation per se (because of the compiler's limitations),
there are plenty of programs that would like to be compiled and only
want to muffle the banner. Losing the efficiency of compilation is
potentially a high price to pay for clean output.
Guile should not be emitting this banner by default. It's really not
acceptable to damage the visible behaviour of a program that worked
fine on older guile versions. It also, for this auto-compilation to
serve as the invisible optimising cache as which it's intended, ought
to keep quiet about compilation failure: the fallback to interpreting
the script should be silent.
Debian incarnation of this bug report:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734009
-zefram
Zefram <zefram@HIDDEN>:bug-guile@HIDDEN.
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