Introduce an arch field that can be used to filter repositories based on
the local architecture.
If arch is provided and matching with the current GOARCH then the
repository is enabled
docker.Untar
(https://github.com/mudler/luet/blob/master/vendor/github.com/docker/docker/pkg/archive/archive.go#L942) requires absolute paths.
We didn't do any input validation before, assuming the path passed by
were absolute since they were coming from YAML configuration files, now
that this is not the truth anymore we need to sanitize the input.
With this change we check if the given path is absolute or relative, if
it's relative we calculate the absolute path and use it in place.
Also make possible to retrieve the artifact when searching for matches
between repositories list. This made possible to show the package list
when calling `luet search`.
* cmd/search: Add support for search of the packages
with a specific label.
* review Search method of Repositories for permit
different search modes.
* labels are k/v attributes and could be matched
through label key (with HasLabel method) or through
regex that use "$key" + "=" + "$value"
* installer.LuetRepository is now installer.LuetSystemRepository,
a struct that extend config.LuetRepository
* config: system_repositories option is now "repositories".
This resolve viper issue.
* config: cache_repositories option is now "repetitors"
This resolve viper issue.
* cmd/*: Now use new config.LuetRepository
* cmd/search: now create local luet repository if database_engine
is equal to "boltdb"
* concurrency could be configured now from cmdline,
configuration file or LUET_GENERAL__CONCURRENCY env variable
* verbose option is now related to debug option
