Install failure : Failed to find dependencies: python2-config

[bazzaar]

Hi,

(I'm not installing to Docker container, otherwise this might be similar to Issue#26)

My zef is up-to-date (ver 0.42) and perl6 is Rakudo Star 2018-04 (in local dir /home/....)

Running on OpenSUSE leap 42.3, python package installed straight from OpenSUSE repository

which python2.7-config
/usr/bin/python2.7-config
which python2-config
/usr/bin/python2-config

#####@laptoplinux:/usr/bin> file python2-config
python2-config: symbolic link to python2.7-config

This is the error message :

#####@laptoplinux:~/Documents> zef install Inline::Python
===> Searching for: Inline::Python
===> Updated cpan mirror: https://raw.githubusercontent.com/ugexe/Perl6-ecosystems/master/cpan.json
===> Updated p6c mirror: http://ecosystem-api.p6c.org/projects.json
===> Searching for missing dependencies: python2-config, Distribution::Builder::MakeFromJSON
===> Failed to find dependencies: python2-config
Failed to resolve some missing dependencies
in block at /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6/site/sources/7926F4F3ED4C81AA5DA2A54C8AE1E03D03424CCE (Zef::Client) line 166
in sub MAIN at /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6/site/sources/E4784A2A0FA00D16808817186E95FE74BEF3FE2D (Zef::CLI) line 137
in block at /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6/site/resources/3065D08F5332CA244672D7F8A05B603F92BB8A7D line 3
in sub MAIN at /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6/site/bin/zef line 2
in block at /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6/site/bin/zef line 2

I'm fairly sure Inline:Python installed and worked on this machine with previous version(s) of Rakudo Star?

bazzaar

[ugexe]

That is not using zef:ver<0.4.2> like you may think, which is evident by the message:
http://ecosystem-api.p6c.org/projects.json
which in v0.4.2 would read:
http://ecosystem-api.p6c.org/projects1.json

It is possible to have zef:ver<0.4.2> installed but for an older version to be used -- this will be fixed in rakudo/rakudo#1812 -- this is due to rakudo choosing the bin script/modules from the first repo it finds them in instead of considering all repos.

The easiest workaround is to pass --exclude=python2-config to zef. The more elaborate workaround is to completely uninstall all versions of zef but the most recent.

[bazzaar]

ugexe, thankyou for your considerable help on this. I did indeed find 2 versions of zef installed

#####@laptoplinux:~> zef list --installed
===> Found via /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6
CORE:ver<6.c>:auth
===> Found via /home/#####/rakudo/rakudo-star-2018.04/install/share/perl6/site
...
zef:ver<0.3.1>:authgithub:ugexe
zef:ver<0.4.2>:authgithub:ugexe

I eventually took the easiest workaround, as you outlined, as I wasn't entirely confident I'd be able to completely remove zef in order to start again.

passing the "--exclude=python2-config" parameter/value to zef did the trick, I see it now used http://ecosystem-api.p6c.org/projects1.json, as you pointed out it should.

#####@laptoplinux:~> zef --exclude=python2-config install Inline::Python
===> Searching for: Inline::Python
===> Updated cpan mirror: https://raw.githubusercontent.com/ugexe/Perl6-ecosystems/master/cpan1.json
===> Updated p6c mirror: http://ecosystem-api.p6c.org/projects1.json
===> Searching for missing dependencies: Distribution::Builder::MakeFromJSON
===> Searching for missing dependencies: System::Query
===> Building: Inline::Python:ver<0.3>:authcpan:NINE
pyhelper.c: In function ‘py_call_static_method_kw’:
pyhelper.c:293:5: warning: ‘py_retval’ may be used uninitialized in this function [-Wmaybe-uninitialized]
return py_retval;
^
pyhelper.c: In function ‘py_call_static_method’:
pyhelper.c:311:5: warning: ‘py_retval’ may be used uninitialized in this function [-Wmaybe-uninitialized]
return py_retval;
^
pyhelper.c: In function ‘py_call_method’:
pyhelper.c:326:5: warning: ‘py_retval’ may be used uninitialized in this function [-Wmaybe-uninitialized]
return py_retval;
^
pyhelper.c: In function ‘py_call_method_kw’:
pyhelper.c:341:5: warning: ‘py_retval’ may be used uninitialized in this function [-Wmaybe-uninitialized]
return py_retval;
^
===> Building [OK] for Inline::Python:ver<0.3>:authcpan:NINE
===> Testing: System::Query:ver<0.1.4>:authgithub:tony-o
===> Testing [OK] for System::Query:ver<0.1.4>:authgithub:tony-o
===> Testing: Distribution::Builder::MakeFromJSON:ver<0.4>
===> Testing [OK] for Distribution::Builder::MakeFromJSON:ver<0.4>
===> Testing: Inline::Python:ver<0.3>:authcpan:NINE
===> Testing [OK] for Inline::Python:ver<0.3>:authcpan:NINE
===> Installing: System::Query:ver<0.1.4>:authgithub:tony-o
===> Installing: Distribution::Builder::MakeFromJSON:ver<0.4>
===> Installing: Inline::Python:ver<0.3>:authcpan:NINE

[johnsaigle]

@ugexe Thanks this fix also worked for me!