[XTF PATCH v2 4/4] xtf-runner: regularise runner exit code

[Wei Liu <wei.liu2@citrix.com>]

The script now returns the most severe result. Document the exit code in
help string.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 xtf-runner | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/xtf-runner b/xtf-runner
index 1c96750..15b98c6 100755
--- a/xtf-runner
+++ b/xtf-runner
@@ -251,23 +251,30 @@ def run_tests(args):
     if not len(tests):
         raise RunnerError("No tests to run")
 
-    rc = 0
+    rc = all_results.index('SUCCESS')
     results = []
 
     for test in tests:
 
         res = run_test(test)
-        if res != "SUCCESS":
-            rc = 1
+        res_idx = all_results.index(res);
+        if res_idx > rc:
+            rc = res_idx
 
         results.append(res)
 
+    if rc == exit_code('SUCCESS'):
+        for res in results:
+            if res == 'SKIP':
+                rc = exit_code('SKIP')
+                break
+
     print "\nCombined test results:"
 
     for test, res in zip(tests, results):
         print "%-40s %s" % (test, res)
 
-    return rc
+    return exit_code(all_results[rc])
 
 
 def main():
@@ -308,6 +315,13 @@ def main():
                   "       List all 'functional' or 'special' tests\n"
                   "    ./xtf-runner --list hvm64\n"
                   "       List all 'hvm64' tests\n"
+                  "\n"
+                  "  Exit code for this script:\n"
+                  "    0:    everythin is ok\n"
+                  "    1,2:  reserved for python interpreter\n"
+                  "    3:    test(s) are skipped\n"
+                  "    4:    test(s) report error\n"
+                  "    5:    test(s) report failure\n"
                   ),
     )
 
-- 
2.1.4


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