This is a workaround for NixOS#13515
(opening the SQLite DB randomly taking a couple of seconds on ZFS).

(cherry picked from commit ee9b57c)

(cherry picked from commit 6896761)

(cherry picked from commit e7af2e6)

…ition blocks

(cherry picked from commit 41bf87e)

(cherry picked from commit fb493ad)

Apply upstream formatting changes

…nfo-caching

…eaded-git-sink-2

Previously, if you don't have Internet connectivity, tab completion
might try to fetch the flake registry, e.g.

  $ NIX_GET_COMPLETIONS=4 nix build -vvvvv --offline /home/eelco/De
  evaluating file '<nix/derivation-internal.nix>'
  downloading 'https://channels.nixos.org/flake-registry.json'...
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 294 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 541 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 1230 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 2285 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; using cached version

Tagging release 2.30.2

Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>

…hing

Avoid isValidPath(), use queryPathInfo() instead

…n-detsys

Imply --offline during tab completion

SQLite: fsync db.sqlite-shm before opening the database

Make GitFileSystemObjectSink multi-threaded

Sync with upstream 2.30.2

Adding paths to the store can be slow due to I/O overhead, but
especially when going through the daemon because of the round-trip
latency of every wopAddToStore call.

So we now do the addToStore() calls asynchronously from a separate
thread from the evaluator. This slightly speeds up the local store,
and makes going through the daemon almost as fast as a local store.

Add paths to the store asynchronously

Remove obsolete FIXME

This change brings our Determinate Nix source repository in line with our standard branch naming.
One reason we used detsys-main was to avoid confusion in case the upstream NixOS/nix repository changed its default branch to main.
I don't anticipate that happening any time soon if ever, and so let's make the change.

Having this repo have a different branch name has a non-zero cost for humans ("oh right, different branch") and code to account for it.

Since we're shifting to internally run from `trunk()` (hi, jj) in more places, it's a "do it or don't" moment.
I choose to do it.

Rename detsys-main to main