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fix(nix/buildkite): Disable depends_on if build phase is not run

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Extra steps that use `depends_on` (e.g. if they need output from their
parent) should not actually depend on their parents build step if the
build phase is not active.

This is required to actually decouple the phases.

Change-Id: I398da9a8a53e97ca3c635342259fc722d54b8e4a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5829
Tested-by: BuildkiteCI
Reviewed-by: ezemtsov <eugene.zemtsov@gmail.com>
This commit is contained in:
Vincent Ambo 2022-06-02 17:50:01 +00:00 committed by tazjin
parent 302f7e6623
commit df83e3d556
1 changed files with 15 additions and 4 deletions
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19
nix/buildkite/default.nix
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@ -163,6 +163,11 @@ rec {
# List of phases to include.
phases = lib.intersectLists activePhases knownPhases;
# Is the 'build' phase included? This phase is treated specially
# because it always contains the plain Nix builds, and some
# logic/optimisation depends on knowing whether is executing.
buildEnabled = elem "build" phases;
# Convert a target into all of its steps, separated by build
# phase (as phases end up in different chunks).
targetToSteps = target:
@ -181,7 +186,10 @@ rec {
(attrValues (mapAttrs (normaliseExtraStep knownPhases overridable)
(target.meta.ci.extraSteps or { })));
extraSteps = mapAttrs (_: steps: map mkExtraStep steps) splitExtraSteps;
extraSteps = mapAttrs
(_: steps:
map (mkExtraStep buildEnabled) steps)
splitExtraSteps;
in
extraSteps // {
build = [ step ] ++ (extraSteps.build or [ ]);
@ -373,13 +381,16 @@ rec {
# Create the Buildkite configuration for an extra step, optionally
# wrapping it in a gate group.
mkExtraStep = cfg:
mkExtraStep = buildEnabled: cfg:
let
step = {
label = ":gear: ${cfg.label} (from ${cfg.parentLabel})";
skip = if cfg.alwaysRun then false else cfg.parent.skip or false;
# TODO(tazjin): Remember to gate this behaviour with active phases.
depends_on = lib.optional (!cfg.alwaysRun && !cfg.needsOutput) cfg.parent.key;
depends_on = lib.optional
(buildEnabled && !cfg.alwaysRun && !cfg.needsOutput)
cfg.parent.key;
branches =
if cfg.branches != null
then lib.concatStringsSep " " cfg.branches else null;