differentiate between OSes

.gitignore

@@ -1,3 +1,4 @@
+installer
 watchdog.service
 /cmd/install/static
 /watchdog

cmd/install/dist/etc/systemd/system/watchdog.service.tmpl

@@ -3,6 +3,11 @@
 # sudo mkdir -p /opt/{{ .Exec }}/ /var/log/{{ .Exec }}
 # sudo chown -R {{ .Exec }}:{{ .Exec }} /opt/{{ .Exec }}/ /var/log/{{ .Exec }}
 
+# Post-install
+# sudo systemctl daemon-reload
+# sudo systemctl restart {{ .Exec }}.service
+# sudo journalctl -xefu {{ .Exec }}
+
 [Unit]
 Description={{ .Name }} - {{ .Desc }}
 Documentation={{ .URL }}
@@ -24,7 +29,7 @@ Group={{ .Group }}
 
 {{ end -}}
 WorkingDirectory=/opt/{{ .Exec }}
-ExecStart=/opt/{{ .Exec }} {{ .Args }}
+ExecStart=/opt/{{ .Exec }}/{{ .Exec }} {{ .Args }}
 ExecReload=/bin/kill -USR1 $MAINPID
 
 {{if .Production -}}

cmd/install/install.go

@@ -4,17 +4,6 @@
 // hence there are a few unnecessary things for the sake of the trying it out
 package main
 
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"log"
-	"text/template"
-
-	"git.rootprojects.org/root/watchdog.go/cmd/install/static"
-)
-
 type Config struct {
 	Name                string `json:"name"`
 	Desc                string `json:"desc"`
@@ -30,48 +19,5 @@ type Config struct {
 
 func main() {
 
-	b, err := static.ReadFile("dist/etc/systemd/system/watchdog.service.tmpl")
-	if err != nil {
-		log.Fatal(err)
-		return
-	}
-	s := string(b)
-
-	j, err := static.ReadFile("dist/etc/systemd/system/watchdog.service.json")
-	if err != nil {
-		log.Fatal(err)
-		return
-	}
-
-	//conf := map[string]string{}
-	conf := &Config{}
-	err = json.Unmarshal(j, &conf)
-	if nil != err {
-		log.Fatal(err)
-		return
-	}
-	if "" == conf.Group {
-		conf.Group = conf.User
-	}
-
-	serviceFile := conf.Exec + ".service"
-
-	rw := &bytes.Buffer{}
-	// not sure what the template name does, but whatever
-	tmpl, err := template.New("service").Parse(s)
-	if err != nil {
-		log.Fatal(err)
-		return
-	}
-
-	err = tmpl.Execute(rw, conf)
-	if nil != err {
-		log.Fatal(err)
-		return
-	}
-
-	if err := ioutil.WriteFile(serviceFile, rw.Bytes(), 0644); err != nil {
-		log.Fatalf("ioutil.WriteFile error: %v", err)
-	}
-	fmt.Printf("Wrote %q\n", serviceFile)
+	install()
 }

cmd/install/install_darwin.go

@@ -0,0 +1,7 @@
+package main
+
+import "log"
+
+func install() {
+	log.Fatal("not yet implemented")
+}

cmd/install/install_linux.go

@@ -0,0 +1,60 @@
+// +build !windows !darwin
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"text/template"
+
+	"git.rootprojects.org/root/watchdog.go/cmd/install/static"
+)
+
+func install() {
+	b, err := static.ReadFile("dist/etc/systemd/system/watchdog.service.tmpl")
+	if err != nil {
+		log.Fatal(err)
+		return
+	}
+	s := string(b)
+
+	j, err := static.ReadFile("dist/etc/systemd/system/watchdog.service.json")
+	if err != nil {
+		log.Fatal(err)
+		return
+	}
+
+	//conf := map[string]string{}
+	conf := &Config{}
+	err = json.Unmarshal(j, &conf)
+	if nil != err {
+		log.Fatal(err)
+		return
+	}
+	if "" == conf.Group {
+		conf.Group = conf.User
+	}
+
+	serviceFile := conf.Exec + ".service"
+
+	rw := &bytes.Buffer{}
+	// not sure what the template name does, but whatever
+	tmpl, err := template.New("service").Parse(s)
+	if err != nil {
+		log.Fatal(err)
+		return
+	}
+
+	err = tmpl.Execute(rw, conf)
+	if nil != err {
+		log.Fatal(err)
+		return
+	}
+
+	if err := ioutil.WriteFile(serviceFile, rw.Bytes(), 0644); err != nil {
+		log.Fatalf("ioutil.WriteFile error: %v", err)
+	}
+	fmt.Printf("Wrote %q\n", serviceFile)
+}

cmd/install/install_windows.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"log"
+	//"golang.org/x/sys/windows"
+)
+
+// See
+// https://github.com/golang/go/issues/28804
+// https://stackoverflow.com/questions/31558066/how-to-ask-for-administer-privileges-on-windows-with-go/31561120
+// https://stackoverflow.com/questions/27366298/check-if-application-is-running-as-administrator-in-golang
+// https://www.reddit.com/r/golang/comments/53dthc/way_to_detect_if_the_programs_running_with/
+// https://play.golang.org/p/bBtRZrk4_p
+func install() {
+	//token := windows.Token(0)
+	log.Fatal("not yet implemented")
+}