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feat(3216): swarmctl shell completions

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Mirrors hivectl exactly: a `completions <shell>` verb that walks the
live clap tree, and a package that pipes it into installShellCompletion
for bash/zsh/fish. Generating from the command tree rather than writing a
script by hand is what keeps completions from drifting away from the
verbs they complete — the same reason `markdown-docs` renders the docs
from that tree.

Dispatched before PathArgs::resolve() for the same reason markdown-docs
is: emitting a completion script needs none of the SWARMCTL_AUTHELIA_*
deployment env vars, and requiring them would make the package's own
build-time invocation fail — exactly where it runs.

swarmctl leaves mkBinPackage for its own derivation, since the extractor
installs a binary and nothing else.
This commit is contained in:
atlas 2026-08-12 20:36:02 +02:00 • committed by mara
commit 75f99ecafb
5 changed files with 72 additions and 1 deletions
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22
nix/packages/default.nix
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@ -155,7 +155,27 @@ in
# the one host that runs the controller, and belongs in that hive's
# closure only. Kept a separate derivation rather than a second binary
# in the daemon's package so a hive can pin one without the other.
swarmctl = mkBinPackage "swarmctl" "hyperhive swarm-level operator CLI";
#
# Not `mkBinPackage`, because of the completions: they come from the
# binary's own `completions <shell>` verb, which walks the live clap
# tree, so they cannot drift from the actual verbs. Same shape as
# `hivectlPkg` above.
swarmctl =
pkgs.runCommand "swarmctl"
{
nativeBuildInputs = [ pkgs.installShellFiles ];
meta = {
description = "hyperhive swarm-level operator CLI";
mainProgram = "swarmctl";
};
}
''
install -Dm755 ${workspaceBuild}/bin/swarmctl $out/bin/swarmctl
installShellCompletion --cmd swarmctl \
--bash <("$out/bin/swarmctl" completions bash) \
--zsh <("$out/bin/swarmctl" completions zsh) \
--fish <("$out/bin/swarmctl" completions fish)
'';
# Static build of the swarm-level UI shell — see ./swarm-ui.nix. Same
# "swarm-scoped, not core-bundle" reasoning as swarm-controller/swarmctl