[PATCH] KVM test: Pass the test parameters through the command line

[Lucas Meneghel Rodrigues <lmr@redhat.com>]

From: Jason Wang <jasowang@redhat.com>

The patch tries to make using kvm-autotest much more easier by
enabling the ability of passing the test parameters from command line
directly through --args="key1=value1 key2=value2 ... keyN=valueN".

The idea is simple, autotest test pass the additional parameters
through args, and the control file analyzes them and generate the
configuration string for kvm_config.

The keywords "only" and "no" were introduced to limit the variants,
for each "only=variant1" the control file would generate a line
"only variant1", same for "no". For others, "key = value" is
generated.

User still need to be familiar with the test parameters in order to
get the intended test matrix.

Change from V3:
Use a slightly bigger subset of the config file language
by allowing "no" to limit the amount of variants.

Change from V2:
Use the args exported by autotest.
Analyze the cmd parameters in control and drop control.cli.
Drop test_cli.cfg.sample so there's no default variants.
Add "only" which is used to limit the varaints.

Change from V1:
Drop the wrapper method and use the control file directly.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 client/tests/kvm/control |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/client/tests/kvm/control b/client/tests/kvm/control
index 63bbe5d..79c0897 100644
--- a/client/tests/kvm/control
+++ b/client/tests/kvm/control
@@ -53,6 +53,20 @@ str = """
 """
 tests_cfg = kvm_config.config()
 tests_cfg_path = os.path.join(kvm_test_dir, "tests.cfg")
+
+if args:
+    # We get test parameters from command line
+    for arg in args:
+        try:
+            (key, value) = re.findall("(.*)=(.*)", arg)[0]
+            if key == "only":
+                str += "only %s\n" % value
+            if key == "no":
+                str += "no %s\n" % value
+            else:
+                str += "%s = %s\n" % (key, value)
+        except IndexError:
+            pass
 tests_cfg.fork_and_parse(tests_cfg_path, str)
 
 # Run the tests
-- 
1.7.3.4