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versioning_policy.md

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Versioning Policy

For Plugins

From the point of view of Pageflow plugins, the pageflow gem follows semantic versioning. Minor versions do not introduce breaking changes to the API used by plugins. Every violation of this principle is considered a bug.

So when developing a plugin, it is safe to depend on a specific major version (i.e. ~> 12.0). A plugin can also require a certain minor version which introduced a certain feature that a plugin might depend on (i.e. ~> 12.1). If a plugin is known to work with multiple major versions of Pageflow, it can depend on a range of major versions (i.e. ['>= 12', '< 14']).

For Host Applications

From the point of view of Rails applications that depend on the Rails engine provided by the pageflow gem, a pragmatic variation of the semantic versioning strategy is applied.

  • Patch level version updates: Only bug fixes, no API changes, no required manual update steps, no new features, except as necessary for security features. There may be optional manual update steps like database migrations that only operate on data and leave the schema unchanged.

  • Minior version updates: New features, no API changes, may require manual update steps.

  • Major version updates: New features, likely to contain API changes and manual update steps.

Manual update steps include (but are not limited to) tasks like:

  • Installing and running migrations

  • Reprocessing Paperclip attachment styles

  • Feature flag configuration via the admin interface

For host applications, it is thus recommended to depend on a specific minor version of the pageflow gem (i.e. ~> 12.1.0). That way patch level updates can be applied automatically via bundle update pageflow. Always refer to the changelog for manual update instructions.