git log --follow seems to sometimes show merges from before the file was
ever created. So, skip them, a file shouldn't be first created during a
merge anyway.
This will be a bit more expensive, but --getctime does not need to be fast.
And getting the real creation time a very useful when untangling blog
histories that involve renames.
I made match_* functions whose influences can vary depending on the page
matched set a special "" influence to indicate this.
Then add_depends can try just one page, and if static influences are found,
stop there.
This was tricky because of the caching, and because use_pagespec always
adds a dependency. That would have made year calendars depend on the whole
pagespec, which is overly broad. So I removed the caching, format_month,
and in format_year just look at %pagesources to see if month pages are
available.
In format_month, I make it always call use_pagespec, so each month calendar
gets the right dependency and any influcences added. This means a bit more
work, but the added work is fairly minimal, and presence dependencies
remove a *lot* of work it used to do.
(100% untested!)
This dependency was missing before switching to use_pagespec.
It is correct to add it, but it needs to be combined with the regular
"pages" dependency to ensure that it does not match extra pages.
(Also fixed its dependency type.)
If a pagespec fails to match, I had been throwing the influences away, but
that is not right. Consider `backlink(foo)`, where foo does not exist.
It still needs to be added as an influence, because if it is created, it
will influence the pagespec to match.
But with that fix, `link(bar)` had as influences all pages, whether they
link to bar or not. Which is not necessary, because modifiying a page to
add a link to bar will directly cause the pagespec to match.
So, in match_link (and all the match_* functions for page metadata),
only return an influence if the match succeeds.
match_backlink had been implemented as the inverse of match_link, but that
is no longer completly true. While match_link does not return an influence
on failure, match_backlink does.
match_created_before/after also return the influence on failure, this way
if created_after(foo) currently fails because foo does not exist, it will
still update the page with the pagespec if foo is created.
This makes it more efficient.
It also fixes the same bug that I fixed in orphans recently,
that only changes to the set of displayed pages were considered (or amoung),
which missed changes to links on other pages to those.
Probably this bug was never noticed because pagestats is most often put
on a blog type page, which gets updated anyway when posts change,
and thus the tag cloud was updated.
This makes it more efficient.
It also fixes a longstanding bug, where if only a small set of pages were
considered by orphans, changes to links on other pages failed to cause an
update.
Joey Hess