GNU bug report logs - #10557
GUILE_LOAD_PATH variable value ignored when setting %load-path.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ian Hulin <ian <at> hulin.org.uk>
To: bug-guile <at> gnu.org
Subject: GUILE_LOAD_PATH variable value ignored when  setting %load-path.
Date: Thu, 19 Jan 2012 22:39:02 +0000

This doesn't appear to work as per page 41, section 4.2.2 Environment
Variables in the docs. Strangely enough, though settings of
GUILE_LOAD_COMPILED_PATH *are* observed and added to the front of
%load-compiled-path.

Cheers,
Ian Hulin

==================================================================================================
ian <at> ian-laptop ~/src/lilypond (T1686)$ echo $GUILE_LOAD_PATH

ian <at> ian-laptop ~/src/lilypond (T1686)$ guile
GNU Guile 2.0.3
Copyright (C) 1995-2011 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> %load-path
$1 = ("/usr/local/share/guile/2.0" "/usr/local/share/guile/site/2.0"
"/usr/local/share/guile/site" "/usr/local/share/guile")
scheme@(guile-user)> ,q
ian <at> ian-laptop ~/src/lilypond (T1686)$ declare -x
GUILE_LOAD_COMPILED_PATH='/home/ian/src/lilypond/scm/out'
ian <at> ian-laptop ~/src/lilypond (T1686)$ guile
GNU Guile 2.0.3
Copyright (C) 1995-2011 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> %load-path
$1 = ("/usr/local/share/guile/2.0" "/usr/local/share/guile/site/2.0"
"/usr/local/share/guile/site" "/usr/local/share/guile")
scheme@(guile-user)> ^\Quit
ian <at> ian-laptop ~/src/lilypond (T1686)$

Message #8 received at 10557 <at> debbugs.gnu.org (full text, mbox):

From: Ian Price <ianprice90 <at> googlemail.com>
To: 10557 <at> debbugs.gnu.org
Cc: Ian Hulin <ian <at> hulin.org.uk>
Subject: Re: bug#10557: GUILE_LOAD_PATH variable value ignored when setting
	%load-path.
Date: Fri, 20 Jan 2012 07:48:15 +0000

Ian Hulin <ian <at> hulin.org.uk> writes:

> ian <at> ian-laptop ~/src/lilypond (T1686)$ echo $GUILE_LOAD_PATH
>
> ian <at> ian-laptop ~/src/lilypond (T1686)$ guile
> GNU Guile 2.0.3
> Copyright (C) 1995-2011 Free Software Foundation, Inc.
>
> Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
> This program is free software, and you are welcome to redistribute it
> under certain conditions; type `,show c' for details.
>
> Enter `,help' for help.
> scheme@(guile-user)> %load-path
> $1 = ("/usr/local/share/guile/2.0" "/usr/local/share/guile/site/2.0"
> "/usr/local/share/guile/site" "/usr/local/share/guile")
> scheme@(guile-user)> ,q
> ian <at> ian-laptop ~/src/lilypond (T1686)$ declare -x
> GUILE_LOAD_COMPILED_PATH='/home/ian/src/lilypond/scm/out'
> ian <at> ian-laptop ~/src/lilypond (T1686)$ guile
> GNU Guile 2.0.3
> Copyright (C) 1995-2011 Free Software Foundation, Inc.
>
> Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
> This program is free software, and you are welcome to redistribute it
> under certain conditions; type `,show c' for details.
>
> Enter `,help' for help.
> scheme@(guile-user)> %load-path
> $1 = ("/usr/local/share/guile/2.0" "/usr/local/share/guile/site/2.0"
> "/usr/local/share/guile/site" "/usr/local/share/guile")
> scheme@(guile-user)> ^\Quit
> ian <at> ian-laptop ~/src/lilypond (T1686)$

Err, all you have done here is show that GUILE_LOAD_COMPILED_PATH has no
bearing on %load-path, which is perfectly in accordance with the
documentation as far as I can see.

As for the question of GUILE_LOAD_PATH not prepending to %load-path, I
can't reproduce this on a recent stable-2.0 with fedora 16.

[ian <at> Kagami ~]$ env GUILE_LOAD_PATH=notadir guile -q
GNU Guile 2.0.3.155-6f0e5
...<snip>...
scheme@(guile-user)> %load-path
$1 = ("notadir" "/usr/local/share/guile/2.0" "/usr/local/share/guile/site/2.0" "/usr/local/share/guile/site" "/usr/local/share/guile")
scheme@(guile-user)> 

I'll report back again after I've built the 2.0.3 release

-- 
Ian Price

"Programming is like pinball. The reward for doing it well is
the opportunity to do it again" - from "The Wizardy Compiled"

Message #11 received at 10557 <at> debbugs.gnu.org (full text, mbox):

From: Ian Price <ianprice90 <at> googlemail.com>
To: 10557 <at> debbugs.gnu.org
Cc: Ian Hulin <ian <at> hulin.org.uk>
Subject: Re: bug#10557: GUILE_LOAD_PATH variable value ignored when setting
	%load-path.
Date: Fri, 20 Jan 2012 08:24:46 +0000

> I'll report back again after I've built the 2.0.3 release
[ian <at> Kagami ~]$ env GUILE_LOAD_PATH=notadir GUILE_LOAD_COMPILED_PATH=notadir2 guile -q
GNU Guile 2.0.3
...<snip>...
scheme@(guile-user)> %load-path
$1 = ("notadir" "/usr/local/share/guile/2.0" "/usr/local/share/guile/site/2.0" "/usr/local/share/guile/site" "/usr/local/share/guile")
scheme@(guile-user)> %load-compiled-path
$2 = ("notadir2" "/usr/local/lib/guile/2.0/ccache" "/usr/local/lib/guile/2.0/site-ccache")
scheme@(guile-user)> 

As you can see, I get the same behaviour on 2.0.3
-- 
Ian Price

"Programming is like pinball. The reward for doing it well is
the opportunity to do it again" - from "The Wizardy Compiled"

Message #16 received at 10557-done <at> debbugs.gnu.org (full text, mbox):

From: Andy Wingo <wingo <at> pobox.com>
To: Ian Hulin <ian <at> hulin.org.uk>
Cc: 10557-done <at> debbugs.gnu.org
Subject: Re: bug#10557: GUILE_LOAD_PATH variable value ignored when setting
	%load-path.
Date: Fri, 03 Feb 2012 16:32:16 +0100

Hi Ian,

I think I agree with ijp's assessment of things.  If you can point to
something in the manual that is confusing in this regard, please let us
know.  Thanks!

Andy
-- 
http://wingolog.org/

Message #17 received at 10557-done <at> debbugs.gnu.org (full text, mbox):

From: Ian Hulin <ian <at> hulin.org.uk>
To: Andy Wingo <wingo <at> pobox.com>
Cc: 10557-done <at> debbugs.gnu.org
Subject: Re: bug#10557: GUILE_LOAD_PATH variable value ignored when setting
	%load-path.
Date: Sat, 04 Feb 2012 23:24:56 +0000

On 03/02/12 15:32, Andy Wingo wrote:
> Hi Ian,
> 
> I think I agree with ijp's assessment of things.  If you can point to
> something in the manual that is confusing in this regard, please let us
> know.  Thanks!
> 

I think that the docs. really need to make the difference in behaviour
clear between the guile compile --load-path option and setting the
GUILE_LOAD_PATH environment variable.  Maybe have an extended example
showing that you can use multiple occurrences of the option on the
command-line, and that you need to do this if you want to pre-pend a
list of values to the load-path e.g

$ guild compile "fred.scm" --load-path='/path/here' \
  --load-path=/path/here/scm' --output='path/here/compiled/fred.go'

causes fred.scm to be compiled to path/here/compiled/fred.go with a
load-path list of "/path/here path/here/scm user/local/share/site etc.."

Another option would be to give the long option a more appropriate name:
--load-path seems to imply that you're suggesting a one-shot
re-definition of the load-path, whereas you're pre-pending things to the
path and you can do this multiple times.
Maybe use --add-to-load-path to mirror the new function you've just
added to the V2.0.5 base code?

Cheers,

Ian Hulin

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