✨ Run stages directly from code instead of shelling out (#23)

Signed-off-by: Itxaka <itxaka.garcia@spectrocloud.com>

internal/agent/hooks/runstage.go

@@ -1,8 +1,9 @@
 package hook
 
 import (
-	"github.com/kairos-io/kairos-sdk/utils"
+	"github.com/kairos-io/kairos/v2/pkg/config"
-	config "github.com/kairos-io/kairos/v2/pkg/config"
+	"github.com/kairos-io/kairos/v2/pkg/elementalConfig"
+	"github.com/kairos-io/kairos/v2/pkg/utils"
 
 	events "github.com/kairos-io/kairos-sdk/bus"
 )
@@ -10,7 +11,11 @@ import (
 type RunStage struct{}
 
 func (r RunStage) Run(_ config.Config) error {
-	utils.SH("elemental run-stage kairos-install.after")             //nolint:errcheck
+	cfg, err := elementalConfig.ReadConfigRun("/etc/elemental")
+	if err != nil {
+		cfg.Logger.Errorf("Error reading config: %s\n", err)
+	}
+	_ = utils.RunStage(&cfg.Config, "kairos-install.after", cfg.Strict, cfg.CloudInitPaths...)
 	events.RunHookScript("/usr/bin/kairos-agent.install.after.hook") //nolint:errcheck
 	return nil
 }

internal/agent/install.go

@@ -22,6 +22,7 @@ import (
 	"github.com/kairos-io/kairos/v2/pkg/config/collector"
 	"github.com/kairos-io/kairos/v2/pkg/elementalConfig"
 	v1 "github.com/kairos-io/kairos/v2/pkg/types/v1"
+	elementalUtils "github.com/kairos-io/kairos/v2/pkg/utils"
 	qr "github.com/mudler/go-nodepair/qrcode"
 	"github.com/mudler/go-pluggable"
 	"github.com/pterm/pterm"
@@ -251,8 +252,14 @@ func Install(dir ...string) error {
 }
 
 func RunInstall(options map[string]string) error {
-	// TODO: run yip directly
+	// Load the installation Config from the system
-	utils.SH("elemental run-stage kairos-install.pre")             //nolint:errcheck
+	installConfig, err := elementalConfig.ReadConfigRun("/etc/elemental")
+	if err != nil {
+		return err
+	}
+
+	// Run pre-install stage
+	_ = elementalUtils.RunStage(&installConfig.Config, "kairos-install.pre", installConfig.Strict, installConfig.CloudInitPaths...)
 	events.RunHookScript("/usr/bin/kairos-agent.install.pre.hook") //nolint:errcheck
 
 	f, _ := os.CreateTemp("", "xxxx")
@@ -277,20 +284,12 @@ func RunInstall(options map[string]string) error {
 	env := append(c.Install.Env, c.Env...)
 	utils.SetEnv(env)
 
-	err := os.WriteFile(f.Name(), []byte(cloudInit), os.ModePerm)
+	err = os.WriteFile(f.Name(), []byte(cloudInit), os.ModePerm)
 	if err != nil {
 		fmt.Printf("could not write cloud init: %s\n", err.Error())
 		os.Exit(1)
 	}
 
-	// Load the installation Config from the system
-	// TODO: This uses the default mounter, logger, fs, etc...
-	// Make it configurable?
-	installConfig, err := elementalConfig.ReadConfigRun("/etc/elemental")
-	if err != nil {
-		return err
-	}
-
 	_, reboot := options["reboot"]
 	_, poweroff := options["poweroff"]
 	installConfig.Reboot = reboot

main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"github.com/kairos-io/kairos/v2/pkg/elementalConfig"
 	v1 "github.com/kairos-io/kairos/v2/pkg/types/v1"
+	"github.com/kairos-io/kairos/v2/pkg/utils"
 	"path/filepath"
 	"runtime"
 
@@ -483,9 +484,40 @@ The validate command expects a configuration file as its only argument. Local fi
 		Usage:       "Print out Kairos' Cloud Configuration JSON Schema",
 		Description: `Prints out Kairos' Cloud Configuration JSON Schema`,
 	},
+	{
+		Name:        "run-stage",
+		Description: "Run stage from cloud-init",
+		Usage:       "Run stage from cloud-init",
+		UsageText:   "run-stage STAGE",
+		Flags: []cli.Flag{
+			&cli.BoolFlag{
+				Name:  "strict",
+				Usage: "Enable strict mode. Fails and exits on stage errors",
+			},
+		},
+		Before: func(c *cli.Context) error {
+			if c.Args().Len() != 1 {
+				cli.HelpPrinter(c.App.Writer, "Stage to run missing\n\n", c.Command)
+				_ = cli.ShowSubcommandHelp(c)
+				return fmt.Errorf("")
+			}
+			return nil
+		},
+		Action: func(c *cli.Context) error {
+			stage := c.Args().First()
+			cfg, err := elementalConfig.ReadConfigRun("/etc/elemental")
+			cfg.Strict = c.Bool("strict")
+
+			if err != nil {
+				cfg.Logger.Errorf("Error reading config: %s\n", err)
+			}
+			return utils.RunStage(&cfg.Config, stage, cfg.Strict, cfg.CloudInitPaths...)
+		},
+	},
 	{
 		Name:        "pull-image",
 		Description: "Pull remote image to local file",
+		Usage:       "Pull remote image to local file",
 		UsageText:   "pull-image [-l] IMAGE TARGET",
 		Flags: []cli.Flag{
 			&cli.BoolFlag{