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seams: move the last four package globals onto instance fields

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Three test seams were still package-level mutable vars, which tests
had to swap before use. That's the classic path to flaky parallel
tests — two goroutines fighting over the same global fake. Push each
down to the struct that owns the behaviour.

internal/daemon/dns_routing.go
  lookupExecutableFunc + vmDNSAddrFunc → fields on *HostNetwork,
  defaulted at newHostNetwork time. dns_routing_test builds
  HostNetwork{..., lookupExecutable: stub, vmDNSAddr: stub} inline,
  no more t.Cleanup dance around package-level vars.

internal/daemon/preflight.go + doctor.go
  vsockHostDevicePath (mutable string) → vsockHostDevice field on
  *VMService, defaulted via defaultVsockHostDevice constant in
  newVMService. Preflight reads s.vsockHostDevice; doctor reads
  d.vm.vsockHostDevice. Logger test sets d.vm.vsockHostDevice = tmp
  after wireServices.

internal/daemon/workspace/workspace.go
  HostCommandOutputFunc → *Inspector struct with a Runner field.
  Every git-using helper (GitOutput, GitTrimmedOutput,
  GitResolvedConfigValue, RunHostCommand, ListSubmodules,
  ListOverlayPaths, CountUntrackedPaths, InspectRepo,
  ImportRepoToGuest, PrepareRepoCopy) is now a method on *Inspector.
  NewInspector() wraps the real host runner for production;
  WorkspaceService holds one via repoInspector, CLI deps holds one
  too. cli_test.go's submodule-rejection test builds its own
  Inspector with a scripted Runner instead of patching a global.
  Pure helpers (FinalizeScript, ResolveSourcePath, ParsePrepareMode,
  ShellQuote, FormatStepError, GitFileURL, ParseNullSeparatedOutput)
  stay free functions since they don't touch the host.

Sentinel: grep for HostCommandOutputFunc, lookupExecutableFunc,
vmDNSAddrFunc, vsockHostDevicePath is now empty across internal/.
make lint test green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Thales Maciel 2026-04-22 12:07:14 -03:00
parent 2685bc73f8
commit ecb18ce6ca
No known key found for this signature in database
GPG key ID: 33112E6833C34679
17 changed files with 201 additions and 137 deletions
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14
internal/daemon/dns_routing.go
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@ -3,18 +3,10 @@ package daemon
import (
"context"
"strings"
"banger/internal/system"
"banger/internal/vmdns"
)
const vmResolverRouteDomain = "~vm"
var (
lookupExecutableFunc = system.LookupExecutable
vmDNSAddrFunc = func(server *vmdns.Server) string { return server.Addr() }
)
func (n *HostNetwork) syncVMDNSResolverRouting(ctx context.Context) error {
if n == nil || n.vmDNS == nil {
return nil
@ -22,13 +14,13 @@ func (n *HostNetwork) syncVMDNSResolverRouting(ctx context.Context) error {
if strings.TrimSpace(n.config.BridgeName) == "" {
return nil
}
if _, err := lookupExecutableFunc("resolvectl"); err != nil {
if _, err := n.lookupExecutable("resolvectl"); err != nil {
return nil
}
if _, err := n.runner.Run(ctx, "ip", "link", "show", n.config.BridgeName); err != nil {
return nil
}
serverAddr := strings.TrimSpace(vmDNSAddrFunc(n.vmDNS))
serverAddr := strings.TrimSpace(n.vmDNSAddr(n.vmDNS))
if serverAddr == "" {
return nil
}
@ -46,7 +38,7 @@ func (n *HostNetwork) clearVMDNSResolverRouting(ctx context.Context) error {
if n == nil || strings.TrimSpace(n.config.BridgeName) == "" {
return nil
}
if _, err := lookupExecutableFunc("resolvectl"); err != nil {
if _, err := n.lookupExecutable("resolvectl"); err != nil {
return nil
}
if _, err := n.runner.Run(ctx, "ip", "link", "show", n.config.BridgeName); err != nil {