Major rewrite of RCS backends. RCS now represented as a class.

Lots of changes and just one commit.  This started with bug
dac91856-cb6a-4f69-8c03-38ff0b29aab2, when I noticed that new bugs
were not being added appropriately with the Git backend.  I'd been
working with Git trouble before with bug
0cad2ac6-76ef-4a88-abdf-b2e02de76f5c, and decided things would be
better off if I just scrapped the current RCS architecture and went to
a more object oriented setup.  So I did.  It's not clear how to add
support for an RCS backend:
 * Create a new module that
   - defines an inheritor of rsc.RCS, overriding the _rcs_*() methods
   - provide a new() function for instantizating the new class
   - defines an inheritor of rcs.RCStestCase, overiding the Class attribute
   - defines 'suite' a unittest.TestSuite testing the module
 * Add your new module to the rest in rcs._get_matching_rcs()
 * Add your new module to the rest in libbe/tests.py
Although I'm not sure libbe/tests.py is still usefull.

The new framework clears out a bunch of hackery that used to be
involved with supporting becommands/diff.py.  There's still room for
progress though.  While implementing the new verision, I moved the
testing framework over from doctest to a doctest/unittest combination.
Longer tests that don't demonstrate a function's usage should be moved
to unittests at the end of the module, since unittest has better
support for setup/teardown, etc.

The new framework also revealed some underimplented backends, most
notably arch.  These backends have now been fixed.

I also tweaked the test_usage.sh script to run through all the backends
if it is called with no arguments.

The fix for the dac bug turned out to be an unflushed file write :p.

1 files changed, 15 insertions, 3 deletions

diff --git a/test_usage.sh b/test_usage.sh
index 26acce1..bba21ee 100755
--- a/test_usage.sh
+++ b/test_usage.sh
@@ -7,6 +7,9 @@
 # usage: test_usage.sh RCS
 # where RCS is one of:
 #   bzr, git, hg, arch, none
+#
+# Note that this script uses the *installed* version of be, not the
+# one in your working tree.
 
 set -e # exit imediately on failed command
 set -o pipefail # pipes fail if any stage fails
@@ -15,9 +18,9 @@ set -v # verbose, echo commands to stdout
 exec 6>&2 # save stderr to file descriptor 6
 exec 2>&1 # fd 2 now writes to stdout
 
-if [ $# -ne 1 ]
+if [ $# -gt 1 ]
 then
-    echo "usage: test_usage.sh RCS"
+    echo "usage: test_usage.sh [RCS]"
     echo ""
     echo "where RCS is one of"
     for RCS in bzr git hg arch none
@@ -25,6 +28,14 @@ then
 	echo "  $RCS"
     done
     exit 1
+elif [ $# -eq 0 ]
+then
+    for RCS in bzr git hg arch none
+    do
+	echo -e "\n\nTesting $RCS\n\n"
+	$0 "$RCS" || exit 1
+    done
+    exit 0
 fi
 
 RCS="$1"
@@ -54,7 +65,7 @@ elif [ "$RCS" == "none" ]
 then
     ID=`id -nu`
 else
-    echo "Unrecognized RCS $RCS"
+    echo "Unrecognized RCS '$RCS'"
     exit 1
 fi
 if [ -z "$ID" ]
@@ -84,6 +95,7 @@ be list -m -s fixed     # see fixed bugs assigned to you
 be assign $BUG 'Joe'    # assign the bug to Joe
 be list -a Joe -s fixed # list the fixed bugs assigned to Joe
 be assign $BUG none     # assign the bug to noone
+be diff                 # see what has changed
 be remove $BUG # decide that you don't like that bug after all
 cd /
 rm -rf $TESTDIR