cmd/bootstraper/main.go

@@ -11,6 +11,7 @@ func main() {
 		Config            string `arg:"-c,--config,env:CONFIG" help:"Configuration values file or directory path" default:"./data/config"`
 		TemplateDirectory string `arg:"-t,--template-dir,env:TEMPLATE_DIR" help:"Template directory path" default:"./data/templates"`
 		RootDirectory     string `arg:"-r,--root-dir,env:ROOT_DIR" help:"Generate files with this root instead of /" default:"/"`
+		DryRun            bool   `arg:"-d,--dry-run,env:DRY_RUN" help:"Dry run do not really complete actions" default:"false"`
 	}
 
 	arg.MustParse(&args)
@@ -21,7 +22,7 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-	if err = hostConfig.ManageServices(); err != nil {
+	if err = hostConfig.ManageServices(args.DryRun); err != nil {
 		panic(err)
 	}
 }

pkg/templater/main.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"os"
 
+	"forge.cadoles.com/pcaseiro/templatefile/pkg/utils"
 	"github.com/imdario/mergo"
 )
 
@@ -80,10 +81,14 @@ func (tc *TemplaterConfig) New(confpath string, templateDir string, rootDir stri
 }
 
 // Process the services contained in the configuration "object"
-func (tc *TemplaterConfig) ManageServices() error {
+func (tc *TemplaterConfig) ManageServices(dryRun bool) error {
 	// Get global vars to add on each service
 	gbls := tc.GlobalService.Vars
 
+	if dryRun {
+		utils.DryRun = dryRun
+	}
+
 	for name, svr := range tc.Services {
 		err := mergo.Merge(&svr.Vars, gbls)
 		if err != nil {

pkg/templater/main_test.go

@@ -0,0 +1,17 @@
+package templater
+
+import "testing"
+
+func TestManageService(t *testing.T) {
+	var hostConfig TemplaterConfig
+
+	err := hostConfig.New("../../data/config/loki-stack.json", "../../data/templates/", "/tmp/testing")
+	if err != nil {
+		t.Errorf(err.Error())
+	}
+
+	err = hostConfig.ManageServices(true)
+	if err != nil {
+		t.Errorf(err.Error())
+	}
+}

pkg/templater/repo-apk.go

@@ -78,7 +78,7 @@ func (hr *APKRepository) Update() error {
 
 // FIXME
 func (hr *APKRepository) Delete() error {
-	fileBytes, err := ioutil.ReadFile("/etc/apk/repositories")
+	fileBytes, err := ioutil.ReadFile(APKConfigFile)
 	if err != nil {
 		return err
 	}
@@ -90,6 +90,9 @@ func (hr *APKRepository) Delete() error {
 }
 
 func (hr *APKRepository) Manage() error {
+	if utils.DryRun {
+		return nil
+	} else {
 		if hr.Enabled {
 			if err := hr.Add(); err != nil {
 				return err
@@ -100,3 +103,4 @@ func (hr *APKRepository) Manage() error {
 			return hr.Delete()
 		}
 	}
+}

pkg/utils/main.go

@@ -2,11 +2,14 @@ package utils
 
 import (
 	"bytes"
+	"fmt"
 	"os/exec"
 
 	"github.com/hashicorp/hcl/v2"
 )
 
+var DryRun = false
+
 func CheckErr(e error) {
 	if e != nil {
 		panic(e)
@@ -21,6 +24,12 @@ func CheckDiags(diag hcl.Diagnostics) {
 
 // Execute a system command ...
 func RunSystemCommand(name string, arg ...string) ([]byte, []byte, error) {
+	if DryRun {
+		stdOut := []byte(fmt.Sprintf("CMD %s\n", name))
+		stdErr := []byte("STDERR\n")
+
+		return stdOut, stdErr, nil
+	} else {
 		var stdOut bytes.Buffer
 		var stdErr bytes.Buffer
 
@@ -30,3 +39,4 @@ func RunSystemCommand(name string, arg ...string) ([]byte, []byte, error) {
 		err := cmd.Run()
 		return stdOut.Bytes(), stdErr.Bytes(), err
 	}
+}