Add help screen

The help screen can be accessed with the flags -h or --help

diff --git a/emerge-timer.py b/emerge-timer.py
index 1a78bde20c2208776df27d7e6b82a20248ca219b..474af710b95df2a3ee192385a2e53a28aaf07a5f 100755 (executable)
--- a/emerge-timer.py
+++ b/emerge-timer.py
@@ -443,6 +443,13 @@ if __name__ == "__main__":
         main('pretended')
         sys.exit(1)
 
+    elif ((sys.argv[1] == "-h") or (sys.argv[1] == "--help")):
+        print("Usage: emerge-timer.py [options] [package]\n\nOptions:\n"
+              + green_start + "\t-p" + color_stop +
+              "\tcalculate compile time from piped 'emerge -p' output\n" +
+              green_start + "\t[none]" + color_stop +
+              "\tShow average emerge times for currently compiling packages.")
+        sys.exit(1)
 
     if len(sys.argv) > 1:
         package_name = sys.argv[1]