Fix bzrlib.builtins.cmd_cat() output for pre 1.6.0 bzrlibs.

Fixed in bzr.dev
  revno: 3341.2.1
  revision-id: bialix@ukr.net-20080407074826-5lwuyv4dn1qlijg4
  parent: pqm@pqm.ubuntu.com-20080407044456-s1a9orh0kssphdh9
  committer: Alexander Belchenko <bialix@ukr.net>
  branch nick: cmd-cat
  timestamp: Mon 2008-04-07 10:48:26 +0300
  message: `bzr cat` no more internally used Tree.print_file().
Merged into bzr.dev's trunk
  revno: 3512 [merge]
  revision-id: pqm@pqm.ubuntu.com-20080626004245-dnw85so4xqg8r9hy
  parent: pqm@pqm.ubuntu.com-20080625230724-lyux37pu8nx8tq34
  parent: aaron@aaronbentley.com-20080626001706-wo3w74fwgliy12s4
  committer: Canonical.com Patch Queue Manager <pqm@pqm.ubuntu.com>
  branch nick: +trunk
  timestamp: Thu 2008-06-26 01:42:45 +0100
  message: (bialix) Deprectate (Branch|Repository).print_file, fix cmd_cat

Before bzr branch 1.6
  bzr.dev$ bzr tags
  ...
  bzr-1.5rc1           3418.6.3
  bzr-1.6              3606.5.9
  ...

Fixes:

python test.py -q libbe.storage.vcs.bzr
...............................FSome value:1E..
======================================================================
ERROR: Get should be able to return the previous version.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/wking/src/fun/be/be.wtk/libbe/storage/base.py", line 976, in test_
get_previous_version
    ret = self.s.get(self.id, revision=revs[i])
  File "/home/wking/src/fun/be/be.wtk/libbe/storage/base.py", line 335, in get
    value = self._get(*args, **kwargs)
  File "/home/wking/src/fun/be/be.wtk/libbe/storage/vcs/base.py", line 849, in _
get
    raise InvalidID(id, revision)
InvalidID: unlikely id in revision 1
...

1 files changed, 9 insertions, 1 deletions

diff --git a/libbe/storage/vcs/bzr.py b/libbe/storage/vcs/bzr.py
index b617d68..03a64f8 100644
--- a/libbe/storage/vcs/bzr.py
+++ b/libbe/storage/vcs/bzr.py
@@ -172,12 +172,20 @@ class Bzr(base.VCS):
         revision = self._parse_revision_string(revision)
         cmd = bzrlib.builtins.cmd_cat()
         cmd.outf = StringIO.StringIO()
+        if self.version_cmp(1,6,0) == -1:
+            # old bzrlib cmd_cat uses sys.stdout not self.outf for output.
+            stdout = sys.stdout
+            sys.stdout = cmd.outf
         try:
             cmd.run(filename=path, revision=revision)
         except bzrlib.errors.BzrCommandError, e:
             if 'not present in revision' in str(e):
                 raise base.InvalidPath(path, root=self.repo, revision=revision)
             raise
+        finally:
+            if self.version_cmp(2,0,0) == -1:
+                cmd.outf = sys.stdout
+                sys.stdout = stdout
         return cmd.outf.getvalue()
 
     def _vcs_path(self, id, revision):
@@ -200,7 +208,7 @@ class Bzr(base.VCS):
         cmd = bzrlib.builtins.cmd_ls()
         cmd.outf = StringIO.StringIO()
         try:
-            if self.version_cmp(2,0,0) == 1:
+            if self.version_cmp(2,0,0) >= 0:
                 cmd.run(revision=revision, path=path, recursive=recursive)
             else: # Pre-2.0 Bazaar
                 cmd.run(revision=revision, path=path,