Added the software version to the mail default template and cli help …

…text, updated README and build script

README.md

@@ -1,4 +1,4 @@
-# WID Notifier
+# WidNotifier
 
 The German [BSI](https://www.bsi.bund.de/) and [LSI Bavaria](https://lsi.bayern.de/) each have a page listing current security notices.  
 This software queries the APIs of these services for new security notices and sends configurable email notifications.
@@ -202,4 +202,6 @@ type WidNotice struct {
 }
 ```
 
+Additionally, the field `WidNotifierVersion` holds the version of the software.
+
 For an example, take a look at `DEFAULT_SUBJECT_TEMPLATE` and `DEFAULT_BODY_TEMPLATE` in [template.go](./template.go).

build.sh

@@ -2,14 +2,13 @@
 
 VERSION=$(git describe --tags)
 
-# i386
-GOOS=linux GOARCH=386 go build -o dist/wid-notifier_${VERSION}_linux_i386
-
-# amd64
-GOOS=linux GOARCH=amd64 go build -o dist/wid-notifier_${VERSION}_linux_amd64
-
-# arm
-GOOS=linux GOARCH=arm go build -o dist/wid-notifier_${VERSION}_linux_arm
-
-# arm64
-GOOS=linux GOARCH=arm64 go build -o dist/wid-notifier_${VERSION}_linux_arm64
+function build() {
+    printf "Compiling version ${VERSION} for ${1}/${2}\t"
+    GOOS=${1} GOARCH=${2} go build -ldflags "-X 'main.Version=${VERSION}'" -o dist/wid-notifier_${VERSION}_${1}_${3}
+    echo "✅"
+}
+
+build linux "386" i386
+build linux amd64 amd64
+build linux arm arm
+build linux arm64 arm64

mail.go

@@ -61,7 +61,7 @@ func (r Recipient) sendNotices(notices []WidNotice, template MailTemplate, auth
 			data = cacheResult
 		} else {
 			cacheMisses++
-			mailContent, err := template.generate(n)
+			mailContent, err := template.generate(TemplateData{n, Version})
 			if err != nil {
 				logger.error("Could not create mail from template")
 				logger.error(err)

main.go

@@ -16,7 +16,10 @@ func main() {
 	// get cli arguments
 	args := os.Args
 	if len(args) < 2 {
-		fmt.Printf("Usage: %v <configfile>\nIf the config file doesn't exist, a incomplete configuration with default values is created.\n", args[0])
+		fmt.Printf( "Usage: %v <configfile>\n\nIf the config file doesn't exist, an incomplete \n" +
+					"configuration with default values is created.\n\nVersion: %s\n",
+					args[0],
+					Version)
 		os.Exit(1)
 	}
 	configFilePath := os.Args[1]

template.go

@@ -26,7 +26,16 @@ Affected Products:{{ range $product := .ProductNames }}
 
 Assigned CVEs:{{ range $cve := .Cves }}
   - {{ $cve }} -> https://www.cve.org/CVERecord?id={{ $cve }}
-{{- end }}{{ end }}`
+{{- end }}{{ end }}
+
+
+Sent by WidNotifier {{ .WidNotifierVersion }}
+`
+
+type TemplateData struct {
+	WidNotice
+	WidNotifierVersion string
+}
 
 type MailTemplateConfig struct {
 	SubjectTemplate string `json:"subject"`
@@ -38,14 +47,14 @@ type MailTemplate struct {
 	BodyTemplate template.Template
 }
 
-func (t MailTemplate) generate(notice WidNotice) (MailContent, error) {
+func (t MailTemplate) generate(data TemplateData) (MailContent, error) {
 	c := MailContent{}
 	buffer := &bytes.Buffer{}
-	err := t.SubjectTemplate.Execute(buffer, notice)
+	err := t.SubjectTemplate.Execute(buffer, data)
 	if err != nil { return c, err }
 	c.Subject = buffer.String()
 	buffer.Truncate(0) // we can recycle our buffer
-	err = t.BodyTemplate.Execute(buffer, notice)
+	err = t.BodyTemplate.Execute(buffer, data)
 	if err != nil { return c, err }
 	c.Body = buffer.String()
 	return c, nil

version.go

@@ -0,0 +1,3 @@
+package main
+
+var Version = "devel"