updated docs

README.md

@@ -326,6 +326,7 @@ The following table is giving a list of error code with explanation:
 | 15        | Bad chrooted installation, destination OS needs to be fixed |
 | 16        | Invalid options provided with cron mode activated           |
 | 17        | Missing or invalid status file, can't resume                |
+| 18        | Module file don't exists or is empty                        |
 | 50..100   | Error in module execution                                   |
 | 126       | Command exists but is not executable                        |
 | 127       | Command not found                                           |

doc/dev.md

@@ -566,7 +566,7 @@ associated to the corresponding parameter:
 | Parameter     | Variable           | Type    | Descrition                    |
 |:--------------|:-------------------|:--------|:------------------------------|
 | --help        | *none*             | *n/a*   | Trigger help display directly and exit |
-| --version     | *none*             | *n/a*   | Trigger help display directly and exit |
+| --version     | *none*             | *n/a*   | Trigger version display directly and exit |
 | --module      | MANUAL_MODULE_LIST | string  | The following parameter will set a list of module to use |
 | --check-only  | CHECK_ONLY         | boolean | Activate check only mode      |
 | --jump        | JUMP               | boolean | Activate no checks mode       |
@@ -612,8 +612,25 @@ of the time a basic package manager configuration will be required to make it
 work.
 
 #### 10.1.4. ```load_configuration```
+That function loads configuration files. It will first check for configuration
+given as command line parameter. If no such parameter exists, it will try to
+load a file named ```conf/${HOSTNAME}.conf.sh```. If that file don't exists, the
+generic configuration will be loaded in the file ```conf/init.conf.sh```.
+
+If no configuration file can be found the function will trigger an error and
+exit the script.
 
 #### 10.1.5. ```process_commandline_and_vars```
+That function have the role to check the concistancy of command line parameters.
+It will triger errors if incompatible parameters have been given or if those
+parameters might lead to a non predictable situation.
+
+When those checks are done, the definitive module list to load is created. With
+that list we then checks the modules are available and do not contain the dash
+character.
+
+That function will also triger an error if the definitive module list is empty.
+
 
 -----------------------------------------------------------------------------
 

doc/errors.md

@@ -174,6 +174,14 @@ You asked to resume on last error, but no status file can be found.
 To fix this, remove the ```--resume``` option. You can use the ```--modules```
 option instead to ask for a limited range of modules.
 
+## Error #18: Module file don't exists or is empty
+The module list contains an entry that correspond to no module in the "modules"
+directory or the corresponding file is actually empty.
+
+Check the spelling of the incriminated module. If spelling is correct, check the
+file name of that module. If it don't exists, create the module or remove it
+from the module list.
+
 ## Error #50 to #100: Error in module execution
 A module trigered an internal error while executing change to the system. You
 need to check the concerned module documentation.
@@ -219,6 +227,7 @@ Check the error in the program emiting it and the associated program
 documentation.
 
 -----------------------------------------------------------------------------
+
 Documentation (c) 2019-2021 Geoffray Levasseur.
 
 This file is distributed under3-clause BSD license. The complete license