git-gui: fix detection of Cygwin

patthoyts · patthoyts · commit 577c7e8fc663 · 2016-10-03T11:03:29.000+01:00
MSys2 might *look* like Cygwin, but it is *not* Cygwin... Unless it
is run with `MSYSTEM=MSYS`, that is.

Signed-off-by: Johannes Schindelin &lt;johannes.schindelin@gmx.de&gt;
Signed-off-by: Pat Thoyts &lt;patthoyts@users.sourceforge.net&gt;
diff --git a/git-gui.sh b/git-gui.sh
@@ -275,6 +275,10 @@ proc is_Cygwin {} {
 				set _iscygwin 0
 			} else {
 				set _iscygwin 1
+				# Handle MSys2 which is only cygwin when MSYSTEM is MSYS.
+				if {[info exists ::env(MSYSTEM)] && $::env(MSYSTEM) ne "MSYS"} {
+					set _iscygwin 0
+				}
 			}
 		} else {
 			set _iscygwin 0
