Use $TMUX env variable to detect tmux session

context.go

@@ -7,6 +7,7 @@ type Context struct {
 }
 
 func CreateContext() *Context {
-	insideTmuxSession := os.Getenv("TERM") == "screen"
+	_, tmux := os.LookupEnv("TMUX")
+	insideTmuxSession := os.Getenv("TERM") == "screen" || tmux
 	return &Context{insideTmuxSession}
 }

options.go

@@ -6,7 +6,7 @@ import (
 	"github.com/docopt/docopt-go"
 )
 
-const usage = `Smug - tmux session manager. Version v0.1.4
+const usage = `Smug - tmux session manager. Version v0.1.5
 
 Usage:
 	smug <command> <project> [-w <window>]... [--attach] [--debug]