SVK::Log::Filter::Head - pass the first N revisions
The Head filter requires a single integer as its argument. The integer
represents the number of revisions that the filter should allow to pass down
the filter pipeline. Head only counts revisions that it sees, so if an
upstream filter causes the pipeline to skip a revision, Head won't (and can't)
count it. As soon as Head has seen the specified number of revisions, it stops
the pipeline from processing any further revisions.
This filter is particularly useful when searching log messages for patterns (see
SVK::Log::Filter::Grep). For example, to view the first three revisions with
messages that match "foo", one might use
svk log --filter "grep foo | head 3"
Head leaves all properties and the stash intact.