Shell selection support via ENV

CDIST_LOCAL_SHELL for local scripts
CDIST_REMOTE_SHELL for remote scripts

cdist/exec/local.py

@@ -188,7 +188,7 @@ class Local(object):
         Return the output as a string.
 
         """
-        command = ["/bin/sh", "-e"]
+        command = [ os.environ.get('CDIST_LOCAL_SHELL',"/bin/sh") , "-e"]
         command.append(script)
 
         return self.run(command=command, env=env, return_output=return_output, message_prefix=message_prefix)

cdist/exec/remote.py

@@ -113,7 +113,7 @@ class Remote(object):
 
         """
 
-        command = ["/bin/sh", "-e"]
+        command = [ os.environ.get('CDIST_REMOTE_SHELL',"/bin/sh") , "-e"]
         command.append(script)
 
         return self.run(command, env, return_output)

cdist/shell.py

@@ -45,10 +45,7 @@ class Shell(object):
         """Select shell to execute, if not specified by user"""
 
         if not self.shell:
-            if 'SHELL' in os.environ:
-                self.shell = os.environ['SHELL']
-            else:
-                self.shell = "/bin/sh"
+            self.shell = os.environ.get('SHELL',"/bin/sh")
 
     def _init_files_dirs(self):
         self.local.create_files_dirs()

docs/man/man1/cdist.text

@@ -132,6 +132,12 @@ TMPDIR, TEMP, TMP::
     more information. This is rather useful, if the standard
     directory used does not allow executables.
 
+CDIST_LOCAL_SHELL::
+    Selects shell for local script execution, defaults to /bin/sh
+
+CDIST_REMOTE_SHELL::
+    Selects shell for remote scirpt execution, defaults to /bin/sh
+
 
 EXIT STATUS
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