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Add pre/post build stages to template builds

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Pre-build: apt update
Post-build: apt clean, apt autoremove, rm apt lists

Total steps count includes pre/post commands for accurate progress bars.
This commit is contained in:
Rafeed M. Bhuiyan
2026-03-27 00:00:48 +06:00
parent 5cb37bf2a0
commit c8acac92cc
1 changed files with 21 additions and 4 deletions
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25
internal/service/build.go
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@ -25,6 +25,18 @@ const (
healthcheckTimeout = 60 * time.Second
)
// preBuildCmds run before the user recipe to prepare the build environment.
var preBuildCmds = []string{
"apt update",
}
// postBuildCmds run after the user recipe to clean up caches and reduce image size.
var postBuildCmds = []string{
"apt clean",
"apt autoremove -y",
"rm -rf /var/lib/apt/lists/*",
}
// buildAgentClient is the subset of the host agent client used by the build worker.
type buildAgentClient interface {
CreateSandbox(ctx context.Context, req *connect.Request[pb.CreateSandboxRequest]) (*connect.Response[pb.CreateSandboxResponse], error)
@ -91,7 +103,7 @@ func (s *BuildService) Create(ctx context.Context, p BuildCreateParams) (db.Temp
Healthcheck: p.Healthcheck,
Vcpus: p.VCPUs,
MemoryMb: p.MemoryMB,
TotalSteps: int32(len(p.Recipe)),
TotalSteps: int32(len(p.Recipe) + len(preBuildCmds) + len(postBuildCmds)),
})
if err != nil {
return db.TemplateBuild{}, fmt.Errorf("insert build: %w", err)
@ -170,13 +182,18 @@ func (s *BuildService) executeBuild(ctx context.Context, buildIDStr string) {
return
}
// Parse recipe.
var recipe []string
if err := json.Unmarshal(build.Recipe, &recipe); err != nil {
// Parse user recipe and wrap with pre/post build stages.
var userRecipe []string
if err := json.Unmarshal(build.Recipe, &userRecipe); err != nil {
s.failBuild(ctx, buildID, fmt.Sprintf("invalid recipe JSON: %v", err))
return
}
recipe := make([]string, 0, len(userRecipe)+len(preBuildCmds)+len(postBuildCmds))
recipe = append(recipe, preBuildCmds...)
recipe = append(recipe, userRecipe...)
recipe = append(recipe, postBuildCmds...)
// Pick a platform host and create a sandbox.
host, err := s.Scheduler.SelectHost(ctx, id.PlatformTeamID, false)
if err != nil {