how to make it work with a shebang that uses -Mlib::relative=. ?

[bkerin]

My exotic shebang:

#!/usr/bin/env -S perl '-Mlib::relative=.'

seems to fail under scandeps.pl:

scandeps.pl -x ./test.pl
Can't locate BarMaker.pm in @INC (you may need to install the BarMaker module) (@INC entries checked: /home/bkerin/.plenv/versions/5.42.0/lib/perl5/site_perl/5.42.0/x86_64-linux /home/bkerin/.plenv/versions/5.42.0/lib/perl5/site_perl/5.42.0 /home/bkerin/.plenv/versions/5.42.0/lib/perl5/5.42.0/x86_64-linux /home/bkerin/.plenv/versions/5.42.0/lib/perl5/5.42.0) at ./ts.pl line 6.
BEGIN failed--compilation aborted at ./ts.pl line 6.
SYSTEM ERROR in executing ./ts.pl : 512 at /home/bkerin/.plenv/versions/5.42.0/lib/perl5/site_perl/5.42.0/Module/ScanDeps.pm line 1640.

I couldn't find any way with --xargs or anything way to get the -Mlib::relative=. where it's needed (--xargs is for args to the script itself anyway I guess).

Adding use lib::relative '.' works but it would be nice to be able to do this from the command line

[rschupp]

I couldn't find any way with --xargs or anything way to get the -Mlib::relative=. where it's needed (--xargs is for args to the script itself anyway I guess).

Correct. --xargs is useful if your script does something like

die "no args given" unless @ARGV:

early on, so running scandeps.pl -x on this script will bail out early and will not execute any "meaningful" code.

Sorry, I see no way to trick scandeps.pl do make this work.

Note that there's a deeper problem here: use lib::relative '.' works for scandeps.pl -x script.pl but it doesn't work for scandeps script.pl. The reason is that module ScanDeps doesn't recognize use lib::relative. It recognizes use lib "foo" (and some other commonly used idioms to manipulate @INC) and adds "foo" to its internal model of the scripts @INC to resolve later use and require statements. But use lib::relative is just an ordinary use statement.

[bkerin]

Right. I wouldn't expect this sort of thing to work out via a scan alone but maybe with -x. I don't know what magic scandeps -x is using but I guess it's something like running script via perl script.pl rather than via the shebang and then somehow hooking in some post-script code that examines @inc before the interpreter exits? If that's the case would it also be possible to pass options to the perl? Idk if that would be regarded as worth adding to scandeps but it would let it more closely match the execution environment. Trying to do it automagically via shebang would likely be a bridge too far but since scandeps is likely to show up in e.g. git hooks and such it would still be handy to have a way to use it that didn't require modifying the script itself.