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add tip about metadata driven views (and more flexible view filtering)

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While writing this documentation, I realized that there needed to be a way
to stay in a view like tag=* while adding a filter like tag=work that
applies to the same field.

So, there are really two ways a view can be refined. It can have a new
"field=explicitvalue" filter added to it, which does not change the
"shape" of the view, but narrows the files it shows.
Or, it can have a new view added, which adds another level of
subdirectories.

So, added a vfilter command, which takes explicit values to add to the
filter, and rejects changes that would change the shape of the view.

And, made vadd only accept changes that change the shape of the view.

And, changed the View data type slightly; now components that can match
multiple metadata values can be visible, or not visible.

This commit was sponsored by Stelian Iancu.
This commit is contained in:
Joey Hess 2014-02-19 15:10:18 -04:00
commit dd7b99c860
9 changed files with 201 additions and 53 deletions
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CmdLine/GitAnnex.hs
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@ -29,6 +29,7 @@ import qualified Command.ReKey
import qualified Command.MetaData
import qualified Command.View
import qualified Command.VAdd
import qualified Command.VFilter
import qualified Command.VPop
import qualified Command.VCycle
import qualified Command.Reinject
@ -142,6 +143,7 @@ cmds = concat
, Command.MetaData.def
, Command.View.def
, Command.VAdd.def
, Command.VFilter.def
, Command.VPop.def
, Command.VCycle.def
, Command.Fix.def