tests: introduce 'hghave msys' to skip tests that would fail because of msys

tests/hghave

@@ -221,6 +221,9 b' def has_serve():'
 def has_tic():
     return matchoutput('test -x "`which tic`"', '')
 
+def has_msys():
+    return os.getenv('MSYSTEM')
+
 checks = {
     "baz": (has_baz, "GNU Arch baz client"),
     "bzr": (has_bzr, "Canonical's Bazaar client"),
@@ -255,6 +258,7 b' checks = {'
     "tla": (has_tla, "GNU Arch tla client"),
     "unix-permissions": (has_unix_permissions, "unix-style permissions"),
     "windows": (has_windows, "Windows"),
+    "msys": (has_msys, "Windows with MSYS"),
 }
 
 def list_features():

tests/test-clone-cgi.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate web paths as if they were file paths
+
 This is a test of the wire protocol over CGI-based hgweb.
 initialize repository
 

tests/test-newcgi.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate web paths as if they were file paths
+
 This tests if CGI files from after d0db3462d568 but
 before d74fc8dec2b4 still work.
 

tests/test-newercgi.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate web paths as if they were file paths
+
 This is a rudimentary test of the CGI files as of d74fc8dec2b4.
 
   $ hg init test

tests/test-oldcgi.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate web paths as if they were file paths
+
 This tests if CGI files from before d0db3462d568 still work.
 
   $ hg init test

tests/test-paths.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate /foo/bar as if it was a real file path
+
   $ hg init a
   $ hg clone a b
   updating to branch default

tests/test-push-cgi.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate web paths as if they were file paths
+
 This is a test of the push wire protocol over CGI-based hgweb.
 
 initialize repository

tests/test-revset.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" no-msys || exit 80 # MSYS will translate /a/b/c/ as if it was a real file path
+
   $ HGENCODING=utf-8
   $ export HGENCODING