add dependency manager (#5535) (#5574)

* add dependency manager

* add plugins/module_utils/deps.py to BOTMETA

* ditch usng OrderedDict to keep compatibility with Python 2.6

* Update plugins/module_utils/deps.py

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 0624951e17)

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

plugins/modules/iso_customize.py

@@ -97,19 +97,14 @@ dest_iso:
 '''
 
 import os
-import traceback
 
-PYCDLIB_IMP_ERR = None
-try:
-    import pycdlib
-    HAS_PYCDLIB = True
-except ImportError:
-    PYCDLIB_IMP_ERR = traceback.format_exc()
-    HAS_PYCDLIB = False
-
-from ansible.module_utils.basic import AnsibleModule, missing_required_lib
+from ansible_collections.community.general.plugins.module_utils import deps
+from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils.common.text.converters import to_native
 
+with deps.declare("pycdlib"):
+    import pycdlib
+
 
 # The upper dir exist, we only add subdirectoy
 def iso_add_dir(module, opened_iso, iso_type, dir_path):
@@ -306,9 +301,7 @@ def main():
         required_one_of=[('delete_files', 'add_files'), ],
         supports_check_mode=True,
     )
-    if not HAS_PYCDLIB:
-        module.fail_json(
-            missing_required_lib('pycdlib'), exception=PYCDLIB_IMP_ERR)
+    deps.validate(module)
 
     src_iso = module.params['src_iso']
     if not os.path.exists(src_iso):