Conflicts:
pkg/arvo/lib/azimuth.hoon
This file was turned into a symlink to pkg/base-dev/lib/azimuth.hoon on
one side of the fork, and meanwhile edited on the other side of the fork
(to update ecliptic to the new address for the WSTR fix.)
The two sides of the fork both had different outdated addresses in
base-dev's azimuth.hoon file, and Git's UI helpfully refilled the
contents of arvo's azimuth.hoon so that it showed a merge conflict with
an empty diff.
Resolved by reading out HEAD:pkg/arvo/lib/azimuth.hoon into
pkg/base-dev/lib/azimuth.hoon and manually recreating the symlink.
This adds support for tombstoned files to clay. It does not include any
way to actually tombstone them; that is left for later.
This allows tombstoning at the level of a file. Precisely, this expands
+blob:clay by adding a %dead case:
+$ blob :: fs blob
$% [%delta p=lobe q=[p=mark q=lobe] r=page] :: delta on q
[%direct p=lobe q=page] :: immediate
[%dead p=lobe ~] :: tombstone
== ::
Thus, we maintain the invariant that every lobe corresponds to a blob,
but now a blob may be an explicit tombstone.
Details:
- This has not been tested at all, except that it compiles and boots.
- This does not have a state adapter from master. The only state change
is the definition of +cach.
- Additionally, out-of-date ships may unexpectedly receive a %dead blob
from a foreign clay which would interfere with their ability to download
that desk. No code changes necessary, but sponsors should avoid
tombstoning files in %base for a while so their children can get the
update.
- A merge will only fail if the tombstoned file conflicts with another
change. Note that as written, merging from a past desk *can* bring a
tombstoned file to the head of a desk. Possibly this shouldn't be
allowed.
This also includes a couple refactors that were made possible by ford
fusion (since everything is synchronous now) but never got done. In
both cases we get to remove a monad, which simplifies the code
considerably.
- refactor +merge's error handling to use !!/mule instead of threading
through errors
- refactor all +read-* functions and related parts of +try-fill-sub to
eagerly convert lobes to cages.
We also add support reading %a/b/c/e/f/r/x from past and foreign desks,
when possible. Apologies that all of these are in one commit, it was
all a single chunk of work.
This is a draft until we have a way to tombstone. I suspect we'll want
to have a mechanism of keeping track of gc roots and trace to remove,
but this PR doesn't suggest any particular strategy.
Since spider tracks the thread's source desk now, the glob mark can live
in %garden rather than %base-dev. The mark is only used to verify
a glob from ames in docket.
