Counting the archive

./blog.sh stats           # a screen: posts by year and kind, words, tags, media, sources
./blog.sh stats --json    # the same figures, for whatever reads them next

Reads the archive on disk -- no build, no network, no env.sh -- and comes back in seconds even on a large archive. What it says, and why each line is there:

• The archive: posts split into published, drafts, scheduled and pages. The four add up to the total; a page that is also a draft counts once, as a page.
• By year and What they are: where the archive is thickest, and what it is made of (the dominant content type per post, the same one the /type/ listings use).
• Words: total, mean and median. Both averages, deliberately -- an archive half made of imported tweets pulls the mean far above the middle, and only the pair says so.
• Tags, Media (files on disk, or what the posts ask for when the media directory is not here) and Where it came from -- the platforms the archive is actually made of, which is a different number from how many the importers support.

--json prints the same figures unlocalized and unrounded, so the numbers can go into a post, a cron job or a graph.