cmd/bootstraper/main.go

@@ -11,7 +11,6 @@ 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)
@@ -22,7 +21,7 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-	if err = hostConfig.ManageServices(args.DryRun); err != nil {
+	if err = hostConfig.ManageServices(); err != nil {
 		panic(err)
 	}
 }

data/config/go-test-conf.json

@@ -1,66 +0,0 @@
-{
-    "ConfigFiles": [
-      {
-        "destination": "/etc/loki/loki-local-config.yaml",
-        "group": "grafana",
-        "mode": "600",
-        "owner": "loki",
-        "service": "loki",
-        "source": "loki-local-config.pktpl.hcl"
-      }
-    ],
-    "Daemons": {
-      "Loki": {
-        "enabled": true,
-        "name": "loki"
-      }
-    },
-    "Packages": {
-      "loki": {
-        "action": "install",
-        "name": "loki"
-      },
-      "nodeExporter": {
-        "action": "install",
-        "name": "prometheus-node-exporter"
-      },
-      "promtail": {
-        "action": "install",
-        "name": "loki-promtail"
-      }
-    },
-    "Repositories": {
-      "AlpineTesting": {
-        "enabled": true,
-        "name": "testing",
-        "type": "apk",
-        "url": "http://mirrors.bfsu.edu.cn/alpine/edge/testing"
-      }
-    },
-    "Users": {
-      "loki": {
-        "group": "grafana",
-        "home": "/srv/loki",
-        "shell": "/bin/nologin",
-        "username": "loki"
-      }
-    },
-    "Vars": {
-      "AlertManagerURL": "http://localhost:9092",
-      "AuthEnabled": false,
-      "GRPCPort": "9095",
-      "Group": "grafana",
-      "HTTPPort": "3099",
-      "LogLevel": "error",
-      "ObjectStore": "filesystem",
-      "S2": {
-        "APIKey": "",
-        "APISecretKey": "",
-        "BucketName": "",
-        "URL": ""
-      },
-      "SharedStore": "filesystem",
-      "StorageRoot": "/var/loki",
-      "User": "loki"
-    }
-  }

data/templates/go-test-go.tpl

@@ -1,13 +0,0 @@
-###  Go template test ###
-{{ if .Vars.AuthEnabled  }}
-auth_enabled: true
-{{ else  }}
-auth_enabled: false
-{{ end  }}
-
-server:
-  http_listen_port: {{ .Vars.HTTPPort }}
-  grpc_listen_port: {{ .Vars.GRPCPort }}
-  log_level: {{ .Vars.LogLevel }}
-
-### End Go template test ### 

data/templates/go-test-hcl.pktpl.hcl

@@ -1,12 +0,0 @@
-### HCL2 Template test ###
-%{ if Vars.AuthEnabled ~}
-auth_enabled: true
-%{ else }
-auth_enabled: false
-%{ endif }
-
-server:
-  http_listen_port: ${Vars.HTTPPort}
-  grpc_listen_port: ${Vars.GRPCPort}
-  log_level: ${Vars.LogLevel}
-### END HCL Template test ###

data/templates/loki-local-config.tpl

@@ -1,13 +1,13 @@
-{{ if .Vars.AuthEnabled  }}
+{{ if .AuthEnabled  }}
 auth_enabled: true
 {{ else  }}
 auth_enabled: false
 {{ end  }}
 
 server:
-  http_listen_port: {{ .Vars.HTTPPort }}
+  http_listen_port: {{ .HTTPPort }}
-  grpc_listen_port: {{ .Vars.GRPCPort }}
+  grpc_listen_port: {{ .GRPCPort }}
-  log_level: {{ .Vars.LogLevel }}
+  log_level: {{ .LogLevel }}
 
 ingester:
   wal:

pkg/templater/files.go

@@ -5,8 +5,16 @@ import (
 	"path/filepath"
 	"strconv"
 
+	"bytes"
+	encjson "encoding/json"
 	"fmt"
 	"os"
+	"text/template"
+
+	"github.com/hashicorp/hcl/v2"
+	"github.com/hashicorp/hcl/v2/hclsyntax"
+	"github.com/zclconf/go-cty/cty"
+	ctyjson "github.com/zclconf/go-cty/cty/json"
 
 	"forge.cadoles.com/pcaseiro/templatefile/pkg/utils"
 )
@@ -19,20 +27,19 @@ type ConfigFile struct {
 	Owner        string `json:"owner"`                          // The configuration file owner
 	Service      string `json:"service"`                        // Service to restart after configuration generation
 	Group        string `json:"group"`                          // The configuration file group owner
-	TemplateDir  string
 }
 
 // Generate the configuration file from the template (hcl or json)
 func (cf *ConfigFile) Generate(root string, templateDir string, values []byte) error {
 	var template string
-	cf.TemplateDir = templateDir
 	dest := filepath.Join(root, cf.Destination)
+	source := filepath.Join(templateDir, cf.Source)
 	intMod, err := strconv.ParseInt(cf.Mode, 8, 64)
 	if err != nil {
 		return (err)
 	}
 
-	template, err = cf.ProcessTemplate(root, values)
+	template, err = cf.ProcessTemplate(source, values)
 	if err != nil {
 		return fmt.Errorf("Process templates failed with error: %v", err)
 	}
@@ -50,22 +57,97 @@ func (cf *ConfigFile) Generate(root string, templateDir string, values []byte) e
 }
 
 // Process the template with the provided values
-func (cf *ConfigFile) ProcessTemplate(root string, values []byte) (string, error) {
+func (cf *ConfigFile) ProcessTemplate(source string, values []byte) (string, error) {
 	var result string
 	var err error
 
 	if cf.TemplateType == "hcl" {
 		// The template is an hcl template so we call processHCLTemplate
-		result, err = utils.ProcessHCLTemplate(filepath.Join(cf.TemplateDir, cf.Source), values)
+		result, err = cf.processHCLTemplate(source, values)
 		if err != nil {
 			return "", fmt.Errorf("Process HCL template failed with error: %v", err)
 		}
 	} else if cf.TemplateType == "go" {
 		// The template is a go template so we call processGoTemplate
-		result, err = utils.ProcessGoTemplate(filepath.Join(cf.TemplateDir, cf.Source), values)
+		result, err = cf.processGoTemplate(source, values)
 		if err != nil {
 			return "", fmt.Errorf("Process GO template failed with error: %v", err)
 		}
 	}
 	return result, nil
 }
+
+// The actual template processing for Go templates
+func (cf *ConfigFile) processGoTemplate(file string, configValues []byte) (string, error) {
+
+	// The JSON configuration
+	var confData map[string]interface{}
+	var res bytes.Buffer
+
+	err := encjson.Unmarshal(configValues, &confData)
+	utils.CheckErr(err)
+
+	// Read the template
+	data, err := os.ReadFile(file)
+	utils.CheckErr(err)
+
+	tpl, err := template.New("conf").Parse(string(data))
+	utils.CheckErr(err)
+
+	utils.CheckErr(tpl.Execute(&res, confData["Config"]))
+
+	return res.String(), nil
+}
+
+// The actual template processing for HCL templates
+func (cf *ConfigFile) processHCLTemplate(file string, config []byte) (string, error) {
+
+	fct, err := os.ReadFile(file)
+	utils.CheckErr(err)
+
+	expr, diags := hclsyntax.ParseTemplate(fct, file, hcl.Pos{Line: 0, Column: 1})
+	utils.CheckDiags(diags)
+
+	// Retrieve values from JSON
+	var varsVal cty.Value
+	ctyType, err := ctyjson.ImpliedType(config)
+	if err != nil {
+		return "", err
+		/* Maybe one day
+		cexpr, diags := hclsyntax.ParseExpression(config, "", hcl.Pos{Line: 0, Column: 1})
+		if diags.HasErrors() {
+			panic(diags.Error())
+		}
+		varsVal, diags = cexpr.Value(&hcl.EvalContext{})
+		fmt.Println(cexpr.Variables())
+		checkDiags(diags)
+		*/
+	} else {
+		varsVal, err = ctyjson.Unmarshal(config, ctyType)
+		utils.CheckErr(err)
+	}
+
+	ctx := &hcl.EvalContext{
+		Variables: varsVal.AsValueMap(),
+	}
+
+	for n := range ctx.Variables {
+		if !hclsyntax.ValidIdentifier(n) {
+			return "", fmt.Errorf("invalid template variable name %q: must start with a letter, followed by zero or more letters, digits, and underscores", n)
+		}
+	}
+
+	for _, traversal := range expr.Variables() {
+		root := traversal.RootName()
+		if _, ok := ctx.Variables[root]; !ok {
+			return "", fmt.Errorf("vars map does not contain key %q, referenced at %s", root, traversal[0].SourceRange())
+		}
+	}
+
+	val, diags := expr.Value(ctx)
+	if diags.HasErrors() {
+		return "", diags
+	}
+
+	return val.AsString(), nil
+}

pkg/templater/files_test.go

@@ -1,28 +0,0 @@
-package templater
-
-import (
-	"io/ioutil"
-	"testing"
-)
-
-func TestProcessTemplate(t *testing.T) {
-
-	goFile := ConfigFile{
-		Destination:  "/loki-config.test",
-		Source:       "loki-local-config.tpl",
-		TemplateType: "go",
-		Mode:         "700",
-		TemplateDir:  "../../data/templates/",
-	}
-
-	values, err := ioutil.ReadFile("../../data/config/loki-stack.json")
-	if err != nil {
-		t.Error(err)
-	}
-
-	data, err := goFile.ProcessTemplate("/tmp/", values)
-	if err != nil {
-		t.Errorf(err.Error())
-	}
-	t.Log(data)
-}

pkg/templater/main.go

@@ -6,7 +6,6 @@ import (
 	"log"
 	"os"
 
-	"forge.cadoles.com/pcaseiro/templatefile/pkg/utils"
 	"github.com/imdario/mergo"
 )
 
@@ -81,14 +80,10 @@ func (tc *TemplaterConfig) New(confpath string, templateDir string, rootDir stri
 }
 
 // Process the services contained in the configuration "object"
-func (tc *TemplaterConfig) ManageServices(dryRun bool) error {
+func (tc *TemplaterConfig) ManageServices() 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

@@ -1,17 +0,0 @@
-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(APKConfigFile)
+	fileBytes, err := ioutil.ReadFile("/etc/apk/repositories")
 	if err != nil {
 		return err
 	}
@@ -90,9 +90,6 @@ 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
@@ -103,4 +100,3 @@ func (hr *APKRepository) Manage() error {
 		return hr.Delete()
 	}
 }
-}

pkg/utils/main.go

@@ -2,14 +2,11 @@ package utils
 
 import (
 	"bytes"
-	"fmt"
 	"os/exec"
 
 	"github.com/hashicorp/hcl/v2"
 )
 
-var DryRun = false
-
 func CheckErr(e error) {
 	if e != nil {
 		panic(e)
@@ -24,12 +21,6 @@ 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
 
@@ -39,4 +30,3 @@ func RunSystemCommand(name string, arg ...string) ([]byte, []byte, error) {
 	err := cmd.Run()
 	return stdOut.Bytes(), stdErr.Bytes(), err
 }
-}

pkg/utils/templates.go

@@ -1,89 +0,0 @@
-package utils
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"os"
-	"text/template"
-
-	"github.com/hashicorp/hcl/v2"
-	"github.com/hashicorp/hcl/v2/hclsyntax"
-	"github.com/zclconf/go-cty/cty"
-	ctyjson "github.com/zclconf/go-cty/cty/json"
-)
-
-// The actual template processing for Go templates
-func ProcessGoTemplate(file string, configValues []byte) (string, error) {
-
-	// The JSON configuration
-	var confData map[string]interface{}
-	var res bytes.Buffer
-
-	err := json.Unmarshal(configValues, &confData)
-	CheckErr(err)
-
-	// Read the template
-	templateData, err := os.ReadFile(file)
-	CheckErr(err)
-
-	tpl, err := template.New("conf").Parse(string(templateData))
-	CheckErr(err)
-
-	CheckErr(tpl.Execute(&res, confData))
-
-	return res.String(), nil
-}
-
-// The actual template processing for HCL templates
-func ProcessHCLTemplate(file string, config []byte) (string, error) {
-
-	fct, err := os.ReadFile(file)
-	CheckErr(err)
-
-	expr, diags := hclsyntax.ParseTemplate(fct, file, hcl.Pos{Line: 0, Column: 1})
-	CheckDiags(diags)
-
-	// Retrieve values from JSON
-	var varsVal cty.Value
-	ctyType, err := ctyjson.ImpliedType(config)
-	if err != nil {
-		return "", err
-		/* Maybe one day
-		cexpr, diags := hclsyntax.ParseExpression(config, "", hcl.Pos{Line: 0, Column: 1})
-		if diags.HasErrors() {
-			panic(diags.Error())
-		}
-		varsVal, diags = cexpr.Value(&hcl.EvalContext{})
-		fmt.Println(cexpr.Variables())
-		checkDiags(diags)
-		*/
-	} else {
-		varsVal, err = ctyjson.Unmarshal(config, ctyType)
-		CheckErr(err)
-	}
-
-	ctx := &hcl.EvalContext{
-		Variables: varsVal.AsValueMap(),
-	}
-
-	for n := range ctx.Variables {
-		if !hclsyntax.ValidIdentifier(n) {
-			return "", fmt.Errorf("invalid template variable name %q: must start with a letter, followed by zero or more letters, digits, and underscores", n)
-		}
-	}
-
-	for _, traversal := range expr.Variables() {
-		root := traversal.RootName()
-		if _, ok := ctx.Variables[root]; !ok {
-			return "", fmt.Errorf("vars map does not contain key %q, referenced at %s", root, traversal[0].SourceRange())
-		}
-	}
-
-	val, diags := expr.Value(ctx)
-	if diags.HasErrors() {
-		return "", diags
-	}
-
-	return val.AsString(), nil
-}

pkg/utils/templates_test.go

@@ -1,34 +0,0 @@
-package utils
-
-import (
-	"io/ioutil"
-	"testing"
-)
-
-func TestProcessHCLTemplate(t *testing.T) {
-	// load the Full configuration from a file
-	values, err := ioutil.ReadFile("../../data/config/go-test-conf.json")
-	if err != nil {
-		t.Error(err)
-	}
-
-	data, err := ProcessHCLTemplate("../../data/templates/go-test-hcl.pktpl.hcl", values)
-	if err != nil {
-		t.Errorf(err.Error())
-	}
-	t.Logf("%s", data)
-}
-
-func TestProcessGoTemplate(t *testing.T) {
-	// load values from testing json file
-	values, err := ioutil.ReadFile("../../data/config/go-test-conf.json")
-	if err != nil {
-		t.Error(err)
-	}
-
-	data, err := ProcessGoTemplate("../../data/templates/go-test-go.tpl", values)
-	if err != nil {
-		t.Error(err)
-	}
-	t.Logf("%s", data)
-}