Moved VCS detection from _vcs_help() to _vcs_version().

The version string is useful information to have around, while the
help string is probably not.  For example, we use it in
darcs.Darcs._vcs_get_file_contents() to construct an incantation
appropriate to the version we're dealing with.

1 files changed, 6 insertions, 4 deletions

diff --git a/libbe/darcs.py b/libbe/darcs.py
index 16005f2..a46403c 100644
--- a/libbe/darcs.py
+++ b/libbe/darcs.py
@@ -40,8 +40,10 @@ class Darcs(vcs.VCS):
     name="darcs"
     client="darcs"
     versioned=True
-    def _vcs_help(self):
-        status,output,error = self._u_invoke_client("--help")
+    def _vcs_version(self):
+        status,output,error = self._u_invoke_client("--version")
+        num_part = output.split(" ")[0]
+        self.parsed_version = [int(i) for i in num_part.split(".")]
         return output
     def _vcs_detect(self, path):
         if self._u_search_parent_directories(path, "_darcs") != None :
@@ -97,9 +99,9 @@ class Darcs(vcs.VCS):
             return vcs.VCS._vcs_get_file_contents(self, path, revision,
                                               binary=binary)
         else:
-            try:
+            if self.parsed_version[0] >= 2:
                 return self._u_invoke_client("show", "contents", "--patch", revision, path)
-            except vcs.CommandError:
+            else:
                 # Darcs versions < 2.0.0pre2 lack the "show contents" command
 
                 status,output,error = self._u_invoke_client("diff", "--unified",