Add Npm, Cmd and Mount commands

podctl/visitors/__init__.py

@@ -1,7 +1,10 @@
 from .base import Base  # noqa
+from .cmd import Cmd  # noqa
 from .commit import Commit  # noqa
 from .config import Config  # noqa
 from .copy import Copy  # noqa
+from .npm import Npm  # noqa
+from .mount import Mount  # noqa
 from .packages import Packages  # noqa
 from .pip import Pip  # noqa
 from .run import Run  # noqa

podctl/visitors/cmd.py

@@ -0,0 +1,7 @@
+class Cmd:
+    def __init__(self, cmd):
+        self.cmd = cmd
+
+    def build(self, script):
+        # script._run() does not really support sudo code
+        script.run(self.cmd)

podctl/visitors/mount.py

@@ -0,0 +1,7 @@
+class Mount:
+    def __init__(self, src, dst):
+        self.src = src
+        self.dst = dst
+
+    def build(self, script):
+        script.mount(self.src, self.dst)

podctl/visitors/npm.py

@@ -0,0 +1,6 @@
+class Npm:
+    def __init__(self, install=None):
+        self.npm_install = install
+
+    def build(self, script):
+        script.append('""')