Re: @INC not reflecting correctly

I want the @INC to be as follows...

I would firstly create the following My_INC.pm:

package My_INC;

BEGIN {
 @INC = qw(
/ajperznes/perl/localperl
/ajperznes/perl/lib/5.32.0/x86_64-linux
/ajperznes/perl/lib/5.32.0
/ajperznes/perl/lib/site_perl/5.32.0/x86_64-linux
/ajperznes/perl/lib/site_perl/5.32.0
/ajperznes/perl/lib/5.32.0/x86_64-linux
/ajperznes/perl/lib/5.32.0
          );
};

1;
[download]

and place it in one of the ~~existing @INC directories~~ directories currently listed in @INC. (Create such a directory if none currently exist.)

Then set the PERL5OPT environment variable to -MMy_INC
Then, every time perl is invoked, @INC is set as desired.

On my Windows 7 machine:

C:\>perl -le "print 'PERL5OPT: ' . $ENV{PERL5OPT}; print for @INC;"
PERL5OPT:
C:/perl-5.34.0/site/lib/MSWin32-x64-multi-thread
C:/perl-5.34.0/site/lib
C:/perl-5.34.0/lib/MSWin32-x64-multi-thread
C:/perl-5.34.0/lib

C:\>set PERL5OPT=-MMy_INC

C:\>perl -le "print 'PERL5OPT: ' . $ENV{PERL5OPT}; print for @INC;"
PERL5OPT: -MMy_INC
/ajperznes/perl/localperl
/ajperznes/perl/lib/5.32.0/x86_64-linux
/ajperznes/perl/lib/5.32.0
/ajperznes/perl/lib/site_perl/5.32.0/x86_64-linux
/ajperznes/perl/lib/site_perl/5.32.0
/ajperznes/perl/lib/5.32.0/x86_64-linux
/ajperznes/perl/lib/5.32.0

C:\>
[download]

Cheers,
Rob

Comment on Re: @INC not reflecting correctly Select or Download Code

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Re^2: @INC not reflecting correctly by syphilis (Archbishop) on Aug 27, 2021 at 03:44 UTC
Then, every time perl is invoked, @INC is set as desired. Actually, that's not quite always so. This was not what I expected: `C:\>perl -MMath::BigInt -le "print 'PERL5OPT: ' . $ENV{PERL5OPT};print + for @INC; " PERL5OPT: -MMy_INC /ajperznes/perl/localperl /ajperznes/perl/lib/5.32.0/x86_64-linux /ajperznes/perl/lib/5.32.0 /ajperznes/perl/lib/site_perl/5.32.0/x86_64-linux /ajperznes/perl/lib/site_perl/5.32.0 /ajperznes/perl/lib/5.32.0/x86_64-linux /ajperznes/perl/lib/5.32.0` [download] I expected that command to fail because Math::BigInt does not exist in any of those @INC directories that are listed. (It exists only in one of my original @INC directories.) I expected that command to do the same as the following one-liner (in which PERL5OPT is unset): `C:\>perl -MMy_INC -MMath::BigInt -le "print 'PERL5OPT: ' . $ENV{PERL5O +PT};print for @INC;" Can't locate Math/BigInt.pm in @INC (you may need to install the Math: +:BigInt module) (@INC contains: /ajperznes/perl/localperl /ajperznes/ +perl/lib/5.32.0/x86_64-linux /ajperznes/perl/lib/5.32.0 /ajperznes/pe +rl/lib/site_perl/5.32.0/x86_64-linux /ajperznes/perl/lib/site_perl/5. +32.0 /ajperznes/perl/lib/5.32.0/x86_64-linux /ajperznes/perl/lib/5.32 +.0). BEGIN failed--compilation aborted.` [download] But instead it processed the `-MMath::BigInt` before it processed the `-MMy_INC`. That is, it does the same as: `C:\>perl -MMath::BigInt -MMy_INC -le "print 'PERL5OPT: ' . $ENV{PERL5O +PT};print for @INC;" PERL5OPT: /ajperznes/perl/localperl /ajperznes/perl/lib/5.32.0/x86_64-linux /ajperznes/perl/lib/5.32.0 /ajperznes/perl/lib/site_perl/5.32.0/x86_64-linux /ajperznes/perl/lib/site_perl/5.32.0 /ajperznes/perl/lib/5.32.0/x86_64-linux /ajperznes/perl/lib/5.32.0` [download] Is it possible to have perl process the contents of PERL5OPT *before* any `-M...` command line switches are processed ? UPDATE: I don't think this would be an issue for dirtdog because, IIUC, the directories in his original @INC don't exist anyway. Cheers, Rob	[reply] [d/l] [select]
Re^3: @INC not reflecting correctly by swl (Parson) on Aug 27, 2021 at 05:20 UTC
I'm pretty sure this is something that the Strawberry Perl Portable editions work around. I seem to remember there is some modification of Config.pm or one of its associated files to use local values. I just can't find the mechanism at the moment.	[reply]
Re^4: @INC not reflecting correctly by syphilis (Archbishop) on Aug 27, 2021 at 09:30 UTC
I'm pretty sure this is something that the Strawberry Perl Portable editions work around As regards @INC on Windows, there's no need to work around anything as wrt the setting of @INC. For example, I have a build of perl-5.30.0 in the location `C:/_64/perl530_810`. It reports @INC as being: `C:/_64/perl530_810/site/lib C:/_64/perl530_810/lib` [download] I copy that perl to a new location of `C:/_64/C/perl530_810`. Without any need for me to take any additional action at all, this new perl installation correctly reports @INC as being: `C:/_64/C/perl530_810/site/lib C:/_64/C/perl530_810/lib` [download] This is something that happens automatically on Windows. (I think it just looks at the location of the perl executable and derives @INC accordingly.) However, Linux (amazingly) apparently does not provide such a convenience. It's not quite so simple for portable Strawberry Perl wrt the correct treatment of %Config settings. I think they're probably just rewriting Config.pm and Config_heavy.pl at time of installation. (Again, this is a convenience that is unavailable to Linux.) Cheers, Rob	[reply] [d/l] [select]
Re^5: @INC not reflecting correctly by swl (Parson) on Aug 27, 2021 at 23:55 UTC
Re^6: @INC not reflecting correctly by syphilis (Archbishop) on Aug 28, 2021 at 04:22 UTC
Some notes below your chosen depth have not been shown here
Re^5: @INC not reflecting correctly by bliako (Monsignor) on Aug 28, 2021 at 04:58 UTC


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