Path placeholders support

[crazy-max]

Taken from #57

Add support for placeholder on sources paths.

• date: /data/{{ .Date.Format "2006 Jan 02" }}/
• regexp: ^/data/\d{8}/
• ...

[aversag]

Hi there,
@crazy-max thank you for this beautoful project
is this enhancement planned for next release ? thank you

[crazy-max]

Hi @aversag, will take a look when I've got some time. Thanks

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.