Utility function to convert all values in a dictionary to strings

This will be useful in the next commit, where we want
to construct an environment to run a command from a
dictionary.

The cliapp runcmd method expects that the values in this
dictionary are strings, so we need to convert them before.

2 files changed, 10 insertions, 1 deletions

diff --git a/morphlib/util.py b/morphlib/util.py
index 7526c93c..22288cac 100644
--- a/morphlib/util.py
+++ b/morphlib/util.py
@@ -361,7 +361,6 @@ def parse_environment_pairs(env, pairs):
     return dict(env.items() + extra_env.items())
 
 
-
 def get_host_architecture(): # pragma: no cover
     '''Get the canonical Morph name for the host's architecture.'''
 
@@ -381,3 +380,8 @@ def get_host_architecture(): # pragma: no cover
         raise morphlib.Error('Unknown host architecture %s' % machine)
 
     return table[machine]
+
+
+def sanitize_environment(env):
+    for k in env:
+        env[k] = str(env[k])
diff --git a/morphlib/util_tests.py b/morphlib/util_tests.py
index ca9fe5ae..2ad9e8aa 100644
--- a/morphlib/util_tests.py
+++ b/morphlib/util_tests.py
@@ -105,3 +105,8 @@ class ParseEnvironmentPairsTests(unittest.TestCase):
             morphlib.util.parse_environment_pairs,
             {"foo": "bar"},
             ["foo=bar"])
+
+    def test_sanitize_environment(self):
+        d = { 'a': 1 }
+        morphlib.util.sanitize_environment(d)
+        self.assertTrue(isinstance(d['a'], str))