[gnome-continuous-yocto/gnomeostree-3.28-rocko: 3695/8267] oepydevshell-internal.py: standardize usage output

[Emmanuele Bassi <ebassi src gnome org>]

commit ca916f279ffdf37d38d1f75a90c9ecb44ec8e6e8
Author: Ed Bartosh <ed bartosh linux intel com>
Date:   Fri Dec 9 17:02:30 2016 +0200

    oepydevshell-internal.py: standardize usage output
    
    Made usage output of oepydevshell-internal.py to look
    similar to the output of other oe scripts.
    
    [YOCTO #10751]
    
    (From OE-Core rev: e6480af22a7a12c655efed14f8f1aea658f26b1c)
    
    Signed-off-by: Ed Bartosh <ed bartosh linux intel com>
    Signed-off-by: Ross Burton <ross burton intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 scripts/oepydevshell-internal.py |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/scripts/oepydevshell-internal.py b/scripts/oepydevshell-internal.py
index a22bec3..04621ae 100755
--- a/scripts/oepydevshell-internal.py
+++ b/scripts/oepydevshell-internal.py
@@ -22,9 +22,16 @@ def cbreaknoecho(fd):
     old[3] = old[3] &~ termios.ECHO &~ termios.ICANON
     termios.tcsetattr(fd, termios.TCSADRAIN, old)
 
-if len(sys.argv) != 3:
-    print("Incorrect parameters")
-    sys.exit(1)
+if len(sys.argv) != 3 or sys.argv[1] in ('-h', '--help'):
+    print('oepydevshell-internal.py: error: the following arguments are required: pty, pid\n'
+          'Usage: oepydevshell-internal.py pty pid\n\n'
+          'OpenEmbedded oepydevshell-internal.py - internal script called from 
meta/classes/devshell.bbclass\n\n'
+          'arguments:\n'
+          '  pty                   pty device name\n'
+          '  pid                   parent process id\n\n'
+          'options:\n'
+          '  -h, --help            show this help message and exit\n')
+    sys.exit(2)
 
 pty = open(sys.argv[1], "w+b", 0)
 parent = int(sys.argv[2])
@@ -38,7 +45,7 @@ readline.parse_and_bind("tab: complete")
 try:
     readline.read_history_file(histfile)
 except IOError:
-    pass 
+    pass
 
 try: