Monorepo for Tangled
tangled.org
spindle/microvm: stream realize / build output in nixos activation step
Signed-off-by: dawn <dawn@tangled.org>
author
dawn
date
(Jun 23, 2026, 4:25 PM +0300)
commit
8f7170fd
8f7170fda93b8435ac4d2196246193ecbdcade8f
parent
130efddf
130efddf1fe69f925e216103fffc07e4a8f3afd4
change-id
vvqlnkxr
vvqlnkxrwmmxqylmnnzvkxyzsuynkkus
+72
-12
+1
-1
cmd/spindle-microvm-run/main_linux.go
+1
-1
cmd/spindle-microvm-run/main_linux.go
+61
-9
shuttle/src/activation.rs
+61
-9
shuttle/src/activation.rs
···
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-
use crate::command::{self, Spec, run_capture};
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use crate::command::{CaptureOutput, OutKind, Spec, run_capture, spawn_streaming};
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use crate::nix_config::{SPINDLE_RUN_DIR, nix_executable};
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use crate::protocol::{self, Message, v1};
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use anyhow::{Context, Result};
···
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pub async fn run(id: String, req: v1::ActivateConfig, out: Sender<Message>) {
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let config_key = req.config_key.clone();
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let result = activate(&req).await;
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let result = activate(&id, &req, &out).await;
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let msg = Message {
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id,
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activate_config_result: Some(v1::ActivateConfigResult {
···
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let _ = out.send(msg).await;
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}
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async fn activate(req: &v1::ActivateConfig) -> Result<PathBuf> {
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async fn activate(id: &str, req: &v1::ActivateConfig, out: &Sender<Message>) -> Result<PathBuf> {
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let need_build = req.toplevel.is_empty();
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let timeout = (req.timeout_seconds > 0)
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.then(|| Duration::from_secs(u64::from(req.timeout_seconds)))
···
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.unwrap_or(Duration::from_secs(2 * 60));
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let toplevel = if need_build {
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build_toplevel(req, timeout).await?
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build_toplevel(id, req, timeout, out).await?
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} else {
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realise_toplevel(&req.toplevel, timeout).await?
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realise_toplevel(id, &req.toplevel, timeout, out).await?
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};
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if !toplevel.starts_with("/nix/store/") {
···
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Ok(())
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}
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async fn build_toplevel(req: &v1::ActivateConfig, timeout: Duration) -> Result<PathBuf> {
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async fn build_toplevel(
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id: &str,
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req: &v1::ActivateConfig,
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timeout: Duration,
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out: &Sender<Message>,
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) -> Result<PathBuf> {
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let user_config = (req.user_config.is_empty())
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.then_some("{}")
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.unwrap_or_else(|| &req.user_config);
···
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write_user_config(user_config).context("write user config")?;
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info!("running nix build command for user config toplevel...");
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let output = run_capture(
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let output = run_streaming_stderr(
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Spec::new(nix_executable())
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.args([
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"build",
···
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])
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.cwd(SPINDLE_RUN_DIR)
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.timeout(timeout),
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id,
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out,
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)
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.await?;
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···
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Ok(())
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}
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async fn realise_toplevel(toplevel: &str, timeout: Duration) -> Result<PathBuf> {
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async fn realise_toplevel(
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id: &str,
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toplevel: &str,
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timeout: Duration,
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out: &Sender<Message>,
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) -> Result<PathBuf> {
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if !toplevel.starts_with("/nix/store/") {
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anyhow::bail!("cached config toplevel {toplevel:?} is not a nix store path");
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}
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let output = command::run_capture(
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let output = run_streaming_stderr(
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Spec::new(nix_executable())
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.args(["build", "--no-link", "--show-trace", toplevel])
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.timeout(timeout),
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id,
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out,
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)
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.await?;
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if !output.success() {
···
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}
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Ok(PathBuf::from(toplevel))
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}
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// streams stderr but captures stdout
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async fn run_streaming_stderr(
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spec: Spec,
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id: &str,
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out: &Sender<Message>,
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) -> Result<CaptureOutput> {
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let running = spawn_streaming(spec)?;
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let mut stdout = Vec::new();
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let mut stderr = Vec::new();
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let (mut events, exit_task) = running.into_parts();
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while let Some(event) = events.recv().await {
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match event.kind {
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OutKind::Stdout => stdout.extend_from_slice(&event.data),
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OutKind::Stderr => {
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stderr.extend_from_slice(&event.data);
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let data = String::from_utf8_lossy(&event.data).into_owned();
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let _ = out
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.send(Message {
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id: id.to_owned(),
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exec_stderr: Some(v1::ExecStderr { data }),
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..Default::default()
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})
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.await;
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}
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}
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}
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+
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let exit = exit_task
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.await
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.unwrap_or_else(|error| Err(anyhow::anyhow!("command supervisor failed: {error}")))?;
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Ok(CaptureOutput {
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exit,
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stdout,
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stderr,
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})
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}
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async fn switch_to_configuration(toplevel: &Path, timeout: Duration) -> Result<()> {
+9
-1
spindle/engines/microvm/agent.go
+9
-1
spindle/engines/microvm/agent.go
···
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}
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}
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func (s *AgentSession) ActivateConfig(ctx context.Context, id string, req *agentv1.ActivateConfig) (*agentv1.ActivateConfigResult, error) {
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func (s *AgentSession) ActivateConfig(ctx context.Context, id string, req *agentv1.ActivateConfig, out io.Writer) (*agentv1.ActivateConfigResult, error) {
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s.mu.Lock()
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defer s.mu.Unlock()
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···
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if p := msg.BuiltPaths; p != nil {
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// s.l.Debug("guest built paths", "reason", p.Reason, "count", len(p.Paths))
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} else if p := msg.ExecStderr; p != nil {
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if out != nil {
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_, _ = io.WriteString(out, p.Data)
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}
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} else if p := msg.ExecStdout; p != nil {
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if out != nil {
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_, _ = io.WriteString(out, p.Data)
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}
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} else if p := msg.ActivateConfigResult; p != nil {
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if p.Error != "" {
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return nil, fmt.Errorf("activate config failed: %s", p.Error)