Add search command

[Itxaka]

Adds the helm repo search command to hypper as just hypper search

Under helm you can search on the repos or on their own hub. This
patch only implements the repo search as seems the most useful
and bringing the hub requires a lot of code

This patch also extracts the search code into a new pkg as under
helm the search code is mostly crammed under cmd which means you cannot
use it anywhere, meanwhile this code can be reused by third party
clients to implement their own search frontend or automate it.

Fixes: #78

Signed-off-by: Itxaka igarcia@suse.com

[viccuad]

Nice! having the search functionality in the libs sounds awesome :)

I have only done a fast review so far. Could we first double-check on the exported functions and methods that will be in the lib API? For example, maybe we don't need to expose WriteJSON() and WriteYAML(). Also, could we add comments to the exported ones? (it would help me with the review).

[Itxaka]

For example, maybe we don't need to expose WriteJSON() and WriteYAML().

Unfortunately due to the convoluted way in which those functions are called they need to be exposed because repoSearchWriter needs to implement the Writer interface in order to be called.

Also, could we add comments to the exported ones?

Will do!

[Itxaka]

user docs added!

[viccuad]

Approving, as as we talked on the chat, is gonna get rebased.

[viccuad]

Wooohoo! nice, and with the cmd/helm/search things in our own pkg/search!

Approving, feel free the consider my reviews as passed if/when typos get pushed!

[Itxaka]

rebasing for the conflicts...

[Itxaka]

was already approved by victor, I had to rebase due to merge conflicts on the root.go file (because lint added a command there and we are also adding a command)

So merging :)