Adjust Mercurial execution so it works with version 1.9 and earlier.

This makes the changes for 1.9 brought in by
  bb645f8e489b9f50cd0aec7237ec9adb721797a8
optional.  If the Mercurial version is 1.9 or greater, the new code is
used.  Otherwise, the old code is used.

1 files changed, 9 insertions, 3 deletions

diff --git a/libbe/storage/vcs/hg.py b/libbe/storage/vcs/hg.py
index acf391d..b61e796 100644
--- a/libbe/storage/vcs/hg.py
+++ b/libbe/storage/vcs/hg.py
@@ -83,10 +83,16 @@ class Hg(base.VCS):
         assert len(kwargs) == 1, kwargs
         fullargs = ['--cwd', kwargs['cwd']]
         fullargs.extend(args)
-        output = StringIO.StringIO()
         cwd = os.getcwd()
-        req = mercurial.dispatch.request(fullargs, fout=output)
-        mercurial.dispatch.dispatch(req)
+        output = StringIO.StringIO()
+        if self.version_cmp(1,9):
+            req = mercurial.dispatch.request(fullargs, fout=output)
+            mercurial.dispatch.dispatch(req)
+        else:
+            stdout = sys.stdout
+            sys.stdout = output
+            mercurial.dispatch.dispatch(fullargs)
+            sys.stdout = stdout
         os.chdir(cwd)
         return output.getvalue().rstrip('\n')