Config::Model offers a structure to validate the meaning of configuration information.
This framework is structured around three essential parts: the user interface, the validation engine, and the storage facility. The user interface allows users to interact with the validation engine, which is responsible for validating all configuration data. The storage facility stores all configuration data.
Some users might think that existing configuration validation tools, such as webmin, are sufficient. However, such tools often come with drawbacks. Validation of configuration data is done through a script, which can be complex and cumbersome to maintain. The configuration model is often expressed in instructions, which makes it difficult to separate from the actual processing instruction.
The Config::Model project provides a way to get a validation engine that separates the configuration model from the processing instruction. The configuration model is expressed in a declarative form using a Perl data structure, making it easier to maintain than code. The declaration covers the structure of the configuration data, its properties, default values, mandatory parameters, target audience, online help, and claimed expertise level.
The end result is a smoother maintenance and evolution of the configuration content. The user interface is common across all programs using this project, and advanced parameters are hidden from newbies. Upgrading configuration data is easier, and the framework performs a sanity check. Audit of configuration is possible to check what was modified by the user compared to default values.
The framework also comes with a Curses::UI interface that queries the user's model and generates relevant user screens. The syntax of configuration files varies widely from one program to another, and most users will have to provide a dedicated parser/writer. Nevertheless, the project can provide a writer/parser for most common formats, like ini style file or interface to the Elektra or debconf projects. A single configuration model can use several parsers and writers to ensure the consistency of multiple configuration files together.
Overall, Config::Model provides a comprehensive framework to aid in the validation of semantic content of configuration data. It is an essential tool for those seeking a solution to the complexities of software upgrade and maintenance.
Version 1.102: N/A