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florentdestremau wants to merge 2 commits into from
+46 −16
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Allow updating a specific app via once update <app> #26

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2ce2407
Allow updating a specific app via once update <app>
florentdestremau Mar 22, 2026
2ee4bad
Extract shared deploy progress helper and avoid unnecessary Docker in…
florentdestremau Mar 22, 2026
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51 changes: 45 additions & 6 deletions internal/command/update.go
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Original file line number Diff line number Diff line change
@@ -1,8 +1,12 @@
package command

import (
"context"
"fmt"

"github.com/spf13/cobra"

"github.com/basecamp/once/internal/docker"
"github.com/basecamp/once/internal/version"
)

Expand All @@ -13,12 +17,47 @@ type updateCommand struct {
func newUpdateCommand() *updateCommand {
u := &updateCommand{}
u.cmd = &cobra.Command{
Use: "update",
Short: "Update once to the latest version",
Args: cobra.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return version.NewUpdater().UpdateBinary()
},
Use: "update [app]",
Short: "Update once to the latest version, or update a specific application",
Args: cobra.MaximumNArgs(1),
RunE: WithNamespace(u.run),
}
return u
}

// Private

func (u *updateCommand) run(ctx context.Context, ns *docker.Namespace, cmd *cobra.Command, args []string) error {
if len(args) == 0 {
return version.NewUpdater().UpdateBinary()
}

appName := args[0]
progress := func(p docker.DeployProgress) {
switch p.Stage {
case docker.DeployStageDownloading:
fmt.Printf("Downloading: %d%%\n", p.Percentage)
case docker.DeployStageStarting:
fmt.Println("Starting...")
case docker.DeployStageFinished:
fmt.Println("Finished")
}
}

var changed bool
err := withApplication(ns, appName, "updating", func(app *docker.Application) error {
var err error
changed, err = app.Update(ctx, progress)
return err
})
Comment on lines +38 to +43
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Copilot AI Mar 22, 2026

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This updates the app regardless of whether it's currently running. Since app.Update deploys a new container and re-registers with the proxy, once update <app> could unintentionally start an app that was previously stopped. If the intention is to match the background runner logic, add a guard (e.g., require app.Running or otherwise avoid deploying when the app is stopped) and return a clear message/error when the app isn't running.

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@florentdestremau florentdestremau Mar 23, 2026

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I don't think it's a problem, if you use this command I assume you plan to deploy the app

if err != nil {
return err
}

if changed {
fmt.Printf("Updated %s\n", appName)
} else {
fmt.Printf("%s is already up to date\n", appName)
}
return nil
}
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