can not install using CPANPLUS 0.9160, perl 5.10.1

[martinthurn-LFT]

Installing Test::File (1.442)
[MSG] Using cached file '/home/martin/.cpanplus/authors/id/B/BD/BDFOY/CHECKSUMS' on disk; ttl (3600s) is not exceeded
[MSG] Checksum matches for 'Test-File-1.442.tar.gz'
[MSG] Extracting 'Test-File-1.442.tar.gz'
[MSG] Extracted 'Test::File' to '/home/martin/.cpanplus/5.10.1/build/aoDF6d2Ga3/Test-File-1.442'
==> MISSING Signature file! <==
Running [/usr/bin/perl -e use strict; BEGIN { my $old = select STDERR; $|++; select $old; $|++; $0 = shift(@argv); my $rv = do($0); die $@ if $@; } /home/martin/.cpanplus/5.10.1/build/aoDF6d2Ga3/Test-File-1.442/Makefile.PL]...
Use of uninitialized value $makestat in numeric lt (<) at /usr/share/perl5/CPANPLUS/Dist/MM.pm line 413.
Use of uninitialized value $makestat in subtraction (-) at /usr/share/perl5/CPANPLUS/Dist/MM.pm line 414.
[ERROR] File '/home/martin/.cpanplus/5.10.1/build/aoDF6d2Ga3/Test-File-1.442/Makefile' is not readable or does not exist

Key 'file' (/home/martin/.cpanplus/5.10.1/build/aoDF6d2Ga3/Test-File-1.442/Makefile) is of invalid type for 'CPANPLUS::Dist::MM::_find_prereqs' provided by CPANPLUS::Dist::MM::prepare at /usr/share/perl5/CPANPLUS/Module.pm line 823.
[ERROR] Unable to scan '/home/martin/.cpanplus/5.10.1/build/aoDF6d2Ga3/Test-File-1.442/Makefile' for prereqs

[ERROR] Unable to create a new distribution object for 'Test::File' -- cannot continue

[briandfoy]

Noted, but my first suspicion is that this is a problem with CPANPLUS. Can you run the Makefile.PL manually?

[martinthurn-LFT]

Hmm, yes, manual installation steps run smoothly and easily.

[briandfoy]

I was able to reproduce this on perl5.10.1 and CPANPLUS 0.9160. I've also been able to make it work by getting rid of:

-e use strict; BEGIN { my $old = select STDERR; $|++; select $old; $|++; $0 = shift(@ARGV); my $rv = do($0); die $@ if $@; }

The problem here is the do(). The Makefile.PL here is a modulino (https://www.masteringperl.org/2015/01/makefile-pl-as-a-modulino/). If you load it as a module, it doesn't execute. You're supposed to run Makefile.PL as a script.

Starting in CPANPLUS 0.76, there was a perlwrapper feature and it was apparently configurable. In CPANPLUS-0.9158, released this May after seven years of no updates, changed this to a constant. The cpanp_run_perl script what used to be the value of perlwrapper is basically the same thing as that command line.

CPANPLUS does this as a kludge to set auto flushing on the filehandles. I think there's probably a better way to do what it wants to do while avoiding the do. Perhaps exec.

I get too much benefit from my modulino approach, and neither cpan nor cpanm have this issue.

[martinthurn-LFT]

Fair enough. Thank you so much for the explanation!