♻️ Refactor Config.versioned_defaults to reduce merge conflicts (backport to 0.5) #584
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This will be used to simplify the code in lib/net/imap/config.rb. In this first step, only a couple pieces are extracted: * `AttrVersionDefaults` stores the `Config.version_defaults` hash. The hash's `#default_proc` is defined there, too. * `AttrVersionDefaults.compile` only freezes that hash.
This refactoring decouples the assignment of versioned default values and the creation of `version_defaults` config objects. At first, `version_defaults` stores hashes for each version's updated defaults. At the end, the hashes are transformed into config objects by `Config::AttrVersionDefaults.compile!`.
This also causes Config[0.7r] through Config[1.0r] to be aliases (rather than clones) of each other.
This avoids usage of the private `Config#defaults_hash` method, relying instead on the public `#load_defaults` API.
At the cost of one big conflict now, this should significantly reduce future merge conflicts in the config file. It's also easier to match documentation with default values when they're right next to each other. This also assigns all of the original (`Config[0]`) defaults explicitly, and not only where they differ from Config.default.
Similar to the versioned defaults, this could be a source of conflicts when merging, rebasing, or cherry-picking feature and backport branches. Now that all of the attributes specify their defaults, the current version's default config can be compiled from that. The sanity-check at the end of `config.rb` has been removed. It was there to protect against bad merges. Now that `Config.default` is also compiled from the version defaults added to each attr_accessor, the tests in `test/net/imap/test_config.rb` are good enough.
nevans
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nevans
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Backports #544 to the
v0.5-stablebranch. From that PR:This handles that "one final merge conflict" for this branch.