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nix: make DetSys installer the default #2447
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| package nix | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "os" | ||
| "os/exec" | ||
| "runtime" | ||
| ) | ||
|
|
||
| // Installer downloads and installs Nix. | ||
| type Installer struct { | ||
| // Path is the path to the Nix installer. If it's empty, Download and | ||
| // Install will automatically download the installer and set Path to the | ||
| // downloaded file before returning. | ||
| Path string | ||
| } | ||
|
|
||
| // Download downloads the Nix installer without running it. | ||
| func (i *Installer) Download(ctx context.Context) error { | ||
| if i.Path != "" { | ||
| return fmt.Errorf("installer already downloaded: %s", i.Path) | ||
| } | ||
|
|
||
| system := "" | ||
| switch runtime.GOARCH { | ||
| case "amd64": | ||
| switch runtime.GOOS { | ||
| case "darwin": | ||
| system = "x86_64-darwin" | ||
| case "linux": | ||
| system = "x86_64-linux" | ||
| } | ||
| case "arm64": | ||
| switch runtime.GOOS { | ||
| case "darwin": | ||
| system = "aarch64-darwin" | ||
| case "linux": | ||
| system = "aarch64-linux" | ||
| } | ||
| } | ||
|
|
||
| url := "https://install.determinate.systems/nix/nix-installer-" + system | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil) | ||
| if err != nil { | ||
| return fmt.Errorf("create request: %v", err) | ||
| } | ||
|
|
||
| resp, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return fmt.Errorf("do request: %v", err) | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| return fmt.Errorf("status %s", resp.Status) | ||
| } | ||
| installer, err := writeTempFile(resp.Body) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = os.Chmod(installer, 0o755) | ||
| if err != nil { | ||
| return fmt.Errorf("chmod 0755 installer: %v", err) | ||
| } | ||
| i.Path = installer | ||
| return nil | ||
| } | ||
|
|
||
| // Run downloads and installs Nix. | ||
| func (i *Installer) Run(ctx context.Context) error { | ||
| if i.Path == "" { | ||
| err := i.Download(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| cmd := exec.CommandContext(ctx, i.Path, "install") | ||
| switch runtime.GOOS { | ||
| case "darwin": | ||
| cmd.Args = append(cmd.Args, "macos") | ||
| case "linux": | ||
| cmd.Args = append(cmd.Args, "linux") | ||
| _, err := os.Stat("/run/systemd/system") | ||
| if errors.Is(err, os.ErrNotExist) { | ||
| // Respect any env var settings from the user. | ||
| _, ok := os.LookupEnv("NIX_INSTALLER_INIT") | ||
| if !ok { | ||
| cmd.Args = append(cmd.Args, "--init", "none") | ||
| } | ||
| } | ||
| } | ||
| cmd.Args = append(cmd.Args, "--no-confirm") | ||
| cmd.Cancel = func() error { | ||
| return cmd.Process.Signal(os.Interrupt) | ||
| } | ||
| cmd.Stdin = os.Stdin | ||
| cmd.Stdout = os.Stdout | ||
| cmd.Stderr = os.Stderr | ||
| if err := cmd.Run(); err != nil { | ||
| return fmt.Errorf("run installer: %v", err) | ||
| } | ||
| _, _ = SourceProfile() | ||
| return nil | ||
| } | ||
|
|
||
| func writeTempFile(r io.Reader) (path string, err error) { | ||
| tempFile, err := os.CreateTemp("", "devbox-nix-installer-") | ||
| if err != nil { | ||
| return "", fmt.Errorf("create temp file: %v", err) | ||
| } | ||
|
|
||
| _, err = io.Copy(tempFile, r) | ||
| closeErr := tempFile.Close() | ||
| if err == nil && closeErr != nil { | ||
| err = fmt.Errorf("close temp file: %v", closeErr) | ||
| } | ||
|
|
||
| if err != nil { | ||
| os.Remove(tempFile.Name()) | ||
| return "", err | ||
| } | ||
| return tempFile.Name(), nil | ||
| } |
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nit: drop the prefix space?
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I think this puts a space between the spinner and the message. I copied what we have for
Computing the Devbox environment.