Implements support for Nix's new Perl bindings[1]. The current state
basically does `openStore()`, but always uses `auto` and doesn't support
stores at other URIs.
Even though the stores are cached inside the Perl implementation, I
decided to instantiate those once in the Nix helper module. That way
store openings aren't cluttered across the entire codebase. Also, there
are two stores used later on - MACHINE_LOCAL_STORE for `auto`,
BINARY_CACHE_STORE for the one from `store_uri` in `hydra.conf` - and
using consistent names should make the intent clearer then.
This doesn't contain any behavioral changes, i.e. the build product
availability issue from #1352 isn't fixed. This patch only contains the
migration to the new API.
[1] https://github.com/NixOS/nix/pull/9863
Re-executing this search_related on every access turned out to
create very problematic performance. If a jobset had a lot of
error output stored in the jobset, and there were many hundreds
or thousands of active jobs, this could easily cause >1Gbps of
network traffic.
I'm not sure this is a good implementation as-is. It does work,
but the password gets echo'd to the screen. I tried to use IO::Prompt
but IO::Prompt really seems to want to read the password from ARGV.
I'm honestly too lazy to create two commits for fixing these one-line
issues so here's one.
The first hunk fixes the name of the projectName input. This is relevant
now because it gets logged and the log message looks stupid when there
is an input without a name.
The second hunk fixes a warning when using declarative non-flake
jobsets. The implementation may look weird but it's just the same as the
logical implication operator of nix.
Currently we only track how long individual plugins take.
With #1083 we stop executing a lot of plugins, but we
don't have a way to measure its practical impact on the
execution time of handling events.
This happens with flake jobsets for obvious reasons (namely, that nixexprinput
and nixexprpath may be undefined for a flake jobset).
12:38:59 hydra-evaluator.1 | Use of uninitialized value $args[0] in join or string at /home/vin/workspace/vcs/hydra/src/script/hydra-eval-jobset line 648.
12:38:59 hydra-evaluator.1 | Use of uninitialized value $args[1] in join or string at /home/vin/workspace/vcs/hydra/src/script/hydra-eval-jobset line 648.
Yet again, manual testing is proving to be insufficient. I'm pretty
sure I wrote this code but lost it in a rebase, or perhaps the switch
to result classes.
At any rate, this implements the actual "fetch a retry row and run it"
for the hydra-notify daemon.
Tested by hand.
