Both projects saved by rendering, writing a temp file through `private`,
and renaming over the target. `format::write` is that, and it belongs with
the house rules rather than beside either schema: it is the two existing
modules used together, and the thing worth stating once is why they are
used together at all.
That thing is the temp file, and it is not obvious. It is not always new
-- a save killed partway leaves one behind, and reopening it keeps
whatever mode it already had, which is then renamed straight over the file
holding the enrolled token hashes. Opening through `private` sets the mode
on the way in, so the fresh and the leftover case are the same case.
There is a test that creates a 0644 leftover and asserts the config comes
out 0600, because that state cannot arise on a machine where nothing has
ever crashed mid-save -- which is every machine either project has been
developed on.
The temp name is now appended rather than substituted, so `config.ron`
yields `config.ron.tmp`. `with_extension("tmp")` would have produced
`config.tmp`, which is a name that could plausibly belong to something
else.
iris
db4552f4e4