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The Basics
Id: 51586
Status: open
Priority: 0/
Queue: CPAN

Owner: Nobody in particular
Requestors: mschwern [...]

Bug Information
Severity: Wishlist
Broken in: (no value)
Fixed in: (no value)

Subject: Set PERL_AUTOINSTALL=--defaultdeps when CPAN is configured to follow deps
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Module::AutoInstall, people hate it because it stops automated installs dead in their tracks. It duplicates what CPAN already does. It either doesn't seem smart enough to know its running under CPAN, or there's lots of old versions of MI floating around out there. Fortunately there's the PERL_AUTOINSTALL environment variable which lets you control its dependencies. Setting --defaultdeps will make MAI install the default deps without user input. Unfortunately very few people know about this. In the spirit of CPAN's "follow" prerequisites policy, it would make a lot of people happy if CPAN set PERL_AUTOINSTALL to --defaultdeps when the follow prereq policy is set. Similarly, "ignore" can set --skipdeps (though looking at the docs it may be a bit too smart for its own good). There's the side question of what to do if PERL_AUTOINSTALL is already set. The simplest is to just leave it alone and assume the user knows what they're doing. Alternatively, CPAN could append to the existing variable.
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I agree. I've been wanting to do that for a while. I just haven't gotten the tuits for it. David

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