Manage Env Var to provide parameters

main.go

@@ -54,14 +54,14 @@ func setupSettings(adminPass string, confFile string) error {
 }
 
 type args struct {
-	Addr        string `arg:"-l,--addr" help:"host:port of the HTTP server"`
-	RtmpAddr    string `arg:"-r,--rtmp" help:"host:port of the RTMP server"`
-	StreamKey   string `arg:"-k,--key" help:"Stream key, to protect your stream"`
-	AdminPass   string `arg:"-a,--admin" help:"Set admin password. Overrides configuration in settings.json. This will not write the password to settings.json."`
-	ConfigFile  string `arg:"-f,--config" help:"URI of the conf file"`
-	StaticDir   string `arg:"-s,--static" help:"Directory to read static files from by default"`
-	EmotesDir   string `arg:"-e,--emotes" help:"Directory to read emotes. By default it uses the executable directory"`
-	WriteStatic bool   `arg:"--write-static" help:"write static files to the static dir"`
+	Addr        string `arg:"-l,--addr,env:MN_ADDR" help:"host:port of the HTTP server"`
+	RtmpAddr    string `arg:"-r,--rtmp,env:MN_RTMP" help:"host:port of the RTMP server"`
+	StreamKey   string `arg:"-k,--key,env:MN_STREAM_KEY" help:"Stream key, to protect your stream"`
+	AdminPass   string `arg:"-a,--admin,env:MN_ADMIN_PASS" help:"Set admin password. Overrides configuration in settings.json. This will not write the password to settings.json."`
+	ConfigFile  string `arg:"-f,--config,env:MN_CONFIG" help:"URI of the conf file"`
+	StaticDir   string `arg:"-s,--static,env:MN_STATIC" help:"Directory to read static files from by default"`
+	EmotesDir   string `arg:"-e,--emotes,env:MN_EMOTES" help:"Directory to read emotes. By default it uses the executable directory"`
+	WriteStatic bool   `arg:"--write-static,env:MN_WRITE_STATIC" help:"write static files to the static dir"`
 }
 
 func main() {

readme.md

@@ -124,21 +124,30 @@ and a chat only version at
 http://your.domain.host:8089/chat
 ```
 
-The default listen port is `:8089`.  It can be changed by providing a new port
-at startup:
+Some configurations values can be provided by three ways environment variables, run args, settings.json file. 
 
 ```text
-Usage of .\MovieNight.exe:
-  -e bool
-        Whether or not to download approved emotes on startup (default "false")
-  -k string
-        Stream key, to protect your stream (default: "")
-  -l string
-        host:port of the MovieNight (default ":8089")
-  -r string
-        host:port of the RTMP server (default ":1935")
-  -f string
-        the settings file you want to use (default "./settings.json")
+Usage: MovieNight.exe [--addr ADDR] [--rtmp RTMP] [--key KEY] [--admin ADMIN] [--config CONFIG] [--static STATIC] [--emotes EMOTES] [--write-static]
+
+Options:
+  --addr ADDR, -l ADDR
+        host:port of the HTTP server [env: MN_ADDR]
+  --rtmp RTMP, -r RTMP
+        host:port of the RTMP server [env: MN_RTMP]
+  --key KEY, -k KEY
+        Stream key, to protect your stream [env: MN_STREAM_KEY]
+  --admin ADMIN, -a ADMIN
+        Set admin password. Overrides configuration in settings.json. This will not write the password to settings.json. [env: MN_ADMIN_PASS]
+  --config CONFIG, -f CONFIG
+        URI of the conf file [env: MN_CONFIG]
+  --static STATIC, -s STATIC
+        Directory to read static files from by default [env: MN_STATIC]
+  --emotes EMOTES, -e EMOTES
+        Directory to read emotes. By default it uses the executable directory [env: MN_EMOTES]
+  --write-static
+        write static files to the static dir
+  --help, -h
+        display this help and exit
 ```
 
 ## Configuration