feat: add markers

docs/resources/server_block.md

@@ -9,8 +9,12 @@ This resource represents a [server block configuration file](https://www.nginx.c
 resource "nginx_server_block" "my-server" {
   filename = "test.conf"
   enable = true
+  variables = {
+    docker_port = docker_container.web.ports.external
+  }
   content = <<EOF
 # content of file here
+# external docker port is: {# docker_port #}
 EOF
 }
 ```
@@ -20,3 +24,4 @@ EOF
 * `filename` - (Required) Name of the configuration file
 * `content` - (Required) Content of the configuration file
 * `enable` - (Optional) Whether to enable the resource as active configuration. If symlinks were disabled in provider, this setting is ignored. Default: true
+* `markers`- (Optional) Key-Value map. Keys specified as marker (e.g. `{# key #}`) will be replaced by the assigned value.

src/nginx/nginx.go

@@ -4,6 +4,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path"
+	"regexp"
 )
 
 func getNginxDirectories(filename string, m Config) (string, string) {
@@ -15,8 +16,16 @@ func getNginxDirectories(filename string, m Config) (string, string) {
 	return pathAvailable, pathEnabled
 }
 
-func CreateOrUpdateServerBlock(filename string, content string, m Config) (string, error) {
+func CreateOrUpdateServerBlock(filename string, content string, m Config, markers map[string]string) (string, error) {
 	fullPathAvailable, _ := getNginxDirectories(filename, m)
+
+	// Replace markers in content
+	var re *regexp.Regexp
+	for key, value := range markers {
+		re, _ = regexp.Compile("{#\\s*" + key + "\\s*#}")
+		content = re.ReplaceAllString(content, value)
+	}
+
 	if err := ioutil.WriteFile(fullPathAvailable, []byte(content), 0744); err != nil {
 		return "", err
 	}

src/resource_server_block.go

@@ -28,6 +28,12 @@ func resourceServerBlock() *schema.Resource {
 				ForceNew:    true,
 				Description: "Content of the configuration file",
 			},
+			"markers": &schema.Schema{
+				Type:        schema.TypeMap,
+				Optional:    true,
+				ForceNew:    true,
+				Description: "Markers in content that should be replaced",
+			},
 			"enable": &schema.Schema{
 				Type:        schema.TypeBool,
 				Optional:    true,
@@ -43,7 +49,7 @@ func resourceServerBlockCreate(d *schema.ResourceData, m interface{}) error {
 
 	// Create file
 	content := d.Get("content").(string)
-	fullPathAvailable, err := nginx.CreateOrUpdateServerBlock(d.Get("filename").(string), content, config)
+	fullPathAvailable, err := nginx.CreateOrUpdateServerBlock(d.Get("filename").(string), content, config, d.Get("markers").(map[string]string))
 	if err != nil {
 		return err
 	}
@@ -75,8 +81,8 @@ func resourceServerBlockRead(d *schema.ResourceData, m interface{}) error {
 
 func resourceServerBlockUpdate(d *schema.ResourceData, m interface{}) error {
 	// Content changed: replace old file content
-	if d.HasChange("content") {
-		_, err := nginx.CreateOrUpdateServerBlock(d.Id(), d.Get("content").(string), m.(nginx.Config))
+	if d.HasChange("content") || d.HasChange("variables") {
+		_, err := nginx.CreateOrUpdateServerBlock(d.Id(), d.Get("content").(string), m.(nginx.Config), d.Get("markers").(map[string]string))
 		if err != nil {
 			return err
 		}