1 files changed, 93 insertions, 0 deletions
diff --git a/ansible/library/find_kernel.py b/ansible/library/find_kernel.py
new file mode 100644
index 000000000..4623bce89
--- /dev/null
+++ b/ansible/library/find_kernel.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env python
+# Copyright (c) 2017 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+DOCUMENTATION = '''
+---
+module: find_kernel
+short_description: Look for the system kernel on the filesystem
+description:
+    - We need to find the kernel on non-booted systems, disk images, chroots, etc.
+    To do this we check /lib/modules and look for the kernel that matches the running
+    kernle, or failing that we look for the highest-numbered kernel
+options:
+  kernel: starting kernel to check
+  module_dir: Override kernel module dir, default /lib/modules
+'''
+
+LIB_MODULES = "/lib/modules"
+
+
+def try_int(s, *args):
+    """Convert to integer if possible."""
+    try:
+        return int(s)
+    except (TypeError, ValueError):
+        return args[0] if args else s
+
+
+def convert_ints(fields, orig):
+    return tuple((try_int(f) for f in fields)), orig
+
+
+def main():
+    module = AnsibleModule(
+        argument_spec={
+            'kernel': {'required': True, 'type': 'str'},
+            'module_dir': {'required': False, 'type': 'str', 'default': LIB_MODULES},
+        }
+    )
+    params = module.params
+    kernel = params['kernel']
+    module_dir = params['module_dir']
+
+    if os.path.isdir(os.path.join(module_dir, kernel)):
+        module.exit_json(changed=False, kernel=kernel)
+
+    kernel_dirs = os.listdir(module_dir)
+    kernels = sorted((convert_ints(re.split('[-.]', k), k) for k in kernel_dirs), reverse=True)
+    try:
+        newest_kernel = kernels[0][-1]
+    except IndexError:
+        module.fail_json(msg="Unable to find kernels in {}".format(module_dir))
+
+    if os.path.isdir(os.path.join(module_dir, newest_kernel)):
+        module.exit_json(changed=False, kernel=newest_kernel)
+    else:
+        return kernel
+
+    module.fail_json(msg="Unable to kernel other than {}".format(kernel))
+
+
+# <<INCLUDE_ANSIBLE_MODULE_COMMON>>
+from ansible.module_utils.basic import *  # noqa
+
+if __name__ == '__main__':
+    main()
+
+"""
+
+get kernel from uname,  ansible_kernel
+look for that kernel in /lib/modules
+if that kernel doens't exist
+sort lib/modules
+use latest
+
+parse grub
+
+
+
+"""