update argv code

Signed-off-by: Jeff Carr <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/argv.go b/argv.go
new file mode 100644
index 0000000..4183d11
--- /dev/null
+++ b/argv.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"os"
+
+	"github.com/alexflint/go-arg"
+)
+
+/*
+	this parses the command line arguements
+
+	this enables command line options from other packages like 'gui' and 'log'
+*/
+
+var argv args
+
+type args struct {
+	Demo      string `arg:"positional"                   help:"this is just a demo"`
+}
+
+func (a args) Description() string {
+	return `
+This helloworld example demonstrates the 'gui' plugin toolkits
+`
+}
+
+func init() {
+	pp := arg.MustParse(&argv)
+
+	// for very new users or users unfamilar with the command line, this may help them
+	if argv.Demo == "version" || argv.Demo == "help" || argv.Demo == "?" {
+		pp.WriteHelp(os.Stdout)
+		os.Exit(0)
+	}
+}
+
+func (args) Version() string {
+	return "helloworld " + VERSION
+}