# HG changeset patch
# User rdamazio@google.com
# Date 1541476362 28800
# Node ID 1b49b84d5ed521fabdc29b635e9558f782737527
# Parent  1419f780207cc0be468c8474c00f52431905a827
pycompat: adding Linux detection and fixing Mac

Python 3 recommends detecting OSs with the prefix of the platform, but we were
comparing the full string for macOS. We also didn't have Linux detection, which
is convenient for extensions to use (rather than have some OSs detected by hg
and some by the extension).

Reference:
https://docs.python.org/3/library/sys.html#sys.platform

Differential Revision: https://phab.mercurial-scm.org/D5227

diff -r 1419f780207c -r 1b49b84d5ed5 mercurial/pycompat.py
--- a/mercurial/pycompat.py	Mon Nov 05 17:48:23 2018 -0500
+++ b/mercurial/pycompat.py	Mon Nov 05 19:52:42 2018 -0800
@@ -403,7 +403,8 @@
 
 isjython = sysplatform.startswith(b'java')
 
-isdarwin = sysplatform == b'darwin'
+isdarwin = sysplatform.startswith(b'darwin')
+islinux = sysplatform.startswith(b'linux')
 isposix = osname == b'posix'
 iswindows = osname == b'nt'