Failed to open file /home/zoffix/.zef/store/cpan/packages.json: no such file or directory

[zoffixznet]

I have this alias to update Perl 6, which I've just run.

zoffix@leliana:/tmp/tmp.hVkdJkaXlr$ type update-perl6 
update-perl6 is aliased to `rm -fr ~/.perl6; rm -fr ~/.rakudobrew/; git clone https://github.com/tadzik/rakudobrew ~/.rakudobrew; rakudobrew build moar; rakudobrew build zef;'

And now zef fails to install modules. I see this recent commit mentions adding cpan support and the unfound file is has cpan in the name, so maybe that's the suspect.

zoffix@leliana:/tmp/tmp.hVkdJkaXlr$ zef install HTTP::Client
===> Searching for: HTTP::Client
Failed to open file /home/zoffix/.zef/store/cpan/packages.json: no such file or directory
  in any  at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm line 1
  in method slurp-package-list at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/F9AFEBDFA35D22BCCF53CDB4667B5C8E843F7754 (Zef::ContentStorage::Ecosystems) line 41
  in method gather-dists at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/F9AFEBDFA35D22BCCF53CDB4667B5C8E843F7754 (Zef::ContentStorage::Ecosystems) line 16
  in code  at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/F9AFEBDFA35D22BCCF53CDB4667B5C8E843F7754 (Zef::ContentStorage::Ecosystems) line 62
  in code  at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/D0ED6B6C5F63C73D69154AE10269F88F8F9E97A3 (Zef::ContentStorage) line 15
  in method candidates at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/D0ED6B6C5F63C73D69154AE10269F88F8F9E97A3 (Zef::ContentStorage) line 12
  in method find-candidates at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/1DC0BAA246D0774E7EB4F5119C6168E0D8266EFA (Zef::Client) line 90
  in method find-candidates at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/1DC0BAA246D0774E7EB4F5119C6168E0D8266EFA (Zef::Client) line 77
  in sub MAIN at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/A9948E7371E0EB9AFDF1EEEB07B52A1B75537C31 (Zef::CLI) line 100
  in block <unit> at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/resources/3DD33EF601FD300095284AE7C24B770BAADAF32E line 1

Actually thrown at:
  in any  at gen/moar/m-Metamodel.nqp line 3090
  in method slurp-package-list at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/F9AFEBDFA35D22BCCF53CDB4667B5C8E843F7754 (Zef::ContentStorage::Ecosystems) line 41
  in method gather-dists at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/F9AFEBDFA35D22BCCF53CDB4667B5C8E843F7754 (Zef::ContentStorage::Ecosystems) line 16
  in code  at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/F9AFEBDFA35D22BCCF53CDB4667B5C8E843F7754 (Zef::ContentStorage::Ecosystems) line 62
  in code  at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/D0ED6B6C5F63C73D69154AE10269F88F8F9E97A3 (Zef::ContentStorage) line 15
  in method candidates at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/D0ED6B6C5F63C73D69154AE10269F88F8F9E97A3 (Zef::ContentStorage) line 12
  in method find-candidates at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/1DC0BAA246D0774E7EB4F5119C6168E0D8266EFA (Zef::Client) line 90
  in method find-candidates at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/1DC0BAA246D0774E7EB4F5119C6168E0D8266EFA (Zef::Client) line 77
  in sub MAIN at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/sources/A9948E7371E0EB9AFDF1EEEB07B52A1B75537C31 (Zef::CLI) line 100
  in block <unit> at /home/zoffix/.rakudobrew/moar-nom/install/share/perl6/site/resources/3DD33EF601FD300095284AE7C24B770BAADAF32E line 1

zoffix@leliana:/tmp/tmp.hVkdJkaXlr$ less /home/zoffix/.zef/store/cpan/packages.json
/home/zoffix/.zef/store/cpan/packages.json: No such file or directory

Doing this appears to fix the issue:

echo '{}' > /home/zoffix/.zef/store/cpan/packages.json

[ugexe]

Hmmm, first I left cpan enabled in the config by default. This has been corrected.

Not sure why it failed to fetch the cpan meta data file cpan.json and copy to cpan/packages.json though. This appears to fix it: 105bc8c

I'd be be curious to see if your output from zef --debug --/p6c --cpan install HTTP::Client if that command fails. It means I can probably narrow it down to a difference in plugins chosen to execute phases

Also odd is that travis did not have this problem for that cpan commit: https://travis-ci.org/ugexe/zef/jobs/158057547#L1172 even though I was able to reproduce your errors by following your steps exactly

[zoffixznet]

I ran my update-perl6 alias again and everything installed fine.

Here's the output of the command, if it helps (I ran this on one box and just plain zef install HTTP::Client on another box and both worked fine)

zoffix@b-webdev-dt:~$ zef --debug --/p6c --cpan install HTTP::Client
===> Searching for: HTTP::Client
===> Found: HTTP::Client
===> Dependencies: MIME::Base64, HTTP::Status
===> Searching for missing dependencies: MIME::Base64, HTTP::Status
===> Found dependencies: MIME::Base64:ver('1.2'):auth('github:retupmoca'), HTTP::Status
===> Filtering: HTTP::Client
===> Filtering [OK] for HTTP::Client
===> Filtering: MIME::Base64:ver('1.2'):auth('github:retupmoca')
===> Filtering [OK] for MIME::Base64:ver('1.2'):auth('github:retupmoca')
===> Filtering: HTTP::Status
===> Filtering [OK] for HTTP::Status
===> # SKIP: No Build.pm for MIME::Base64:ver('1.2'):auth('github:retupmoca')
===> # SKIP: No Build.pm for HTTP::Status
===> # SKIP: No Build.pm for HTTP::Client
===> Testing: MIME::Base64:ver('1.2'):auth('github:retupmoca')
Testing with plugin: Zef::Service::Shell::prove+{<anon|192230000>}
t/basic.t ................. ok
t/binary-and-long-line.t .. ok
t/oneline.t ............... ok
t/rfc4648-test-vector.t ... ok
All tests successful.
Files=4, Tests=47,  6 wallclock secs ( 0.07 usr  0.01 sys +  5.04 cusr  0.49 csys =  5.61 CPU)
Result: PASS
===> Testing [OK] for MIME::Base64:ver('1.2'):auth('github:retupmoca')
===> Testing: HTTP::Status
Testing with plugin: Zef::Service::Shell::prove+{<anon|192230000>}
t/01-basic.t ..... ok
t/02-is-tests.t .. ok
All tests successful.
Files=2, Tests=46,  2 wallclock secs ( 0.05 usr  0.02 sys +  2.13 cusr  0.25 csys =  2.45 CPU)
Result: PASS
===> Testing [OK] for HTTP::Status
===> Testing: HTTP::Client
Testing with plugin: Zef::Service::Shell::prove+{<anon|192230000>}
t/01-get.t ............. ok
t/02-post.t ............ ok
t/03-post-multipart.t .. ok
All tests successful.
Files=3, Tests=16, 11 wallclock secs ( 0.06 usr  0.01 sys +  7.64 cusr  0.63 csys =  8.34 CPU)
Result: PASS
===> Testing [OK] for HTTP::Client
===> Installing: MIME::Base64:ver('1.2'):auth('github:retupmoca')
===> Install [OK] for MIME::Base64:ver('1.2'):auth('github:retupmoca')
===> Installing: HTTP::Status
===> Install [OK] for HTTP::Status
===> Installing: HTTP::Client
===> Install [OK] for HTTP::Client
zoffix@b-webdev-dt:~$