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NixOS Perl

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6 Nov 2023
@adam:robins.wtf@adam:robins.wtfor do we drop releases earlier than upstream stops security patching?17:08:25
@stigo:matrix.orgstigoA new version of Perl5 is released roughly every year or so, and in nixpkgs we keep the two currently maintained versions.17:09:03
@stigo:matrix.orgstigoWhich today are 5.36 and 5.3817:11:27
@adam:robins.wtf@adam:robins.wtfso 5.36 will be good until roughly may-july next year (depending on release date)17:12:09
@stigo:matrix.orgstigoYeah basically17:13:09
@stigo:matrix.orgstigoUsually backwards compat is not a big issue in perl5, but there are of course some issues :)17:14:27
@stigo:matrix.orgstigoI've proposed to also only keep one version of perl5 in nixpkgs to make maintenance a bit easier, maybe two if/when perl7 ships.17:15:09
@adam:robins.wtf@adam:robins.wtfi suspect that may be fine with slimserver, if we can get it using our perl packages instead of its own17:16:00
@adam:robins.wtf@adam:robins.wtfso to try and move forward, am i correct in assuming i should be removing this directory and replacing it with buildInputs ? https://github.com/Logitech/slimserver/tree/public/8.3/CPAN17:17:19
@adam:robins.wtf@adam:robins.wtfand if so, any tips to save me the time of manually tracking down all the associated packages? :)17:18:05
@stigo:matrix.orgstigo
In reply to @adam:robins.wtf
so to try and move forward, am i correct in assuming i should be removing this directory and replacing it with buildInputs ? https://github.com/Logitech/slimserver/tree/public/8.3/CPAN
I'd guess so, unless something needs to be patched for it to not use the CPAN directory. First I'd check what kind of error messages you get from just using the CPAN directory, likely there are some modules that are not compatible with 5.38 or maybe som nix specific patches that are missing. 		17:19:59
@adam:robins.wtf@adam:robins.wtfit's currently failing with the error in https://github.com/NixOS/nixpkgs/issues/26548817:21:00
@stigo:matrix.orgstigoBut I think we should wait for staging-next before trying, as it has over 600 commits to perlPackages :) I hope it will be merged into master very soon.17:21:08
@adam:robins.wtf@adam:robins.wtf in that CPAN directory is an arch directory which has pre-compiled modules in it 17:21:32
@adam:robins.wtf@adam:robins.wtf(and doesn't have 5.38 obviously)17:22:31
@stigo:matrix.orgstigo
In reply to @adam:robins.wtf
it's currently failing with the error in https://github.com/NixOS/nixpkgs/issues/265488
Those messages do not seems to be perl specific, but come from some tooling inside slimserver 		17:22:26
@adam:robins.wtf@adam:robins.wtfright.17:24:11
@adam:robins.wtf@adam:robins.wtf
In reply to @stigo:matrix.org
Those messages do not seems to be perl specific, but come from some tooling inside slimserver

so to fix these failures, i've added perlPackages to buildInputs for the packages they provide in their pre-built vendoring. this causes version mismatch errors though. e.g.

machine # [    5.747365] slimserver.pl[848]: Parser.pm and Expat.pm versions don't match at /nix/store/7s6gzxci51sf9ypabsn091pgdcxcaan5-perl5.36.1-slimserver-8.3.1/CPAN/XML/Parser.pm line 20.
17:37:22
@stigo:matrix.orgstigoThey still seem to load modules from the vendored CPAN directory according to the error message above17:40:43
@stigo:matrix.orgstigo 
...slimserver-8.3.1/CPAN/XML/Parser.pm line 20
17:41:15
@adam:robins.wtf@adam:robins.wtf Ok, so I’ll remove any that we’re providing and see where that takes me  17:41:17
@stigo:matrix.orgstigo
In reply to @adam:robins.wtf
Ok, so I’ll remove any that we’re providing and see where that takes me 

Managed to get slimserver.pl not fail at compiling by providing the following buildInputs

  buildInputs = with perlPackages; [ DBI EV ClassXSAccessor DBDSQLite CarpClan FileSlurp ExporterLite XMLParser HTMLParser JSONXS DigestSHA1 YAMLLibYAML SubName CryptOpenSSLRSA IOSocketSSL
                                     AnyEvent ClassDataInheritable ClassInspector DBIxClass DataURIEncode FileBOM FileNext
                                     FileWhich IOString TieCacheLRUExpires ImageScale JSONXS JSONXSVersionOneAndTwo LogLog4perl PathClass ProcBackground SQLAbstract TextUnidecode
                                     TieCacheLRU TieRegexpHash XMLSimple URIFind HTTPDaemon DataDump
                                   ];

And removed the CPAN directory in prePatch with rm -r CPAN

17:50:31
@stigo:matrix.orgstigo... also I set perlPackages to perl538Packages17:50:50
@stigo:matrix.orgstigo
In reply to @adam:robins.wtf
Ok, so I’ll remove any that we’re providing and see where that takes me 
*

Managed to get slimserver.pl not fail at compiling by providing the following buildInputs

  buildInputs = with perlPackages; [ DBI EV ClassXSAccessor DBDSQLite CarpClan FileSlurp ExporterLite XMLParser HTMLParser JSONXS DigestSHA1 YAMLLibYAML SubName CryptOpenSSLRSA IOSocketSSL
                                     AnyEvent ClassDataInheritable ClassInspector DBIxClass DataURIEncode FileBOM FileNext
                                     FileWhich IOString TieCacheLRUExpires ImageScale JSONXS JSONXSVersionOneAndTwo LogLog4perl PathClass ProcBackground SQLAbstract TextUnidecode
                                     TieCacheLRU TieRegexpHash XMLSimple URIFind HTTPDaemon DataDump
                                   ];

And removed the CPAN directory in prePatch with rm -r CPAN

17:51:03
@stigo:matrix.orgstigo(on top of your PR)17:51:42
@stigo:matrix.orgstigobbl, gotta run17:51:47
@adam:robins.wtf@adam:robins.wtf Thanks! 17:52:02
@stigo:matrix.orgstigodidnt try the nixos module tho17:52:54
@adam:robins.wtf@adam:robins.wtf Yeah I’ll run it though the tests that I’m improving  17:55:27
@stigo:matrix.orgstigo(the buildInputs above needs to be tidied up a bit as well)17:56:20

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