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Configuration

Mutagen is designed to have sane, conservative defaults, with as little manual configuration as possible. That being said, sane defaults only go so far, and regular users will most likely want to tweak Mutagen's behavior in one way or another.

Mutagen has three levels of configuration: its own default behavior, the global configuration file (~/.mutagen.toml), and per-session configuration.

Mutagen strives to require as little configuration as possible, so its default behavior is designed to be sane, safe, and portable.

The global configuration file allows users to override Mutagen's default behavior with their own defaults that will apply to all newly created sessions. The file is a TOML file with sections affecting various aspects of Mutagen's behavior. Existence of the global configuration file is not required.

Per-session configuration is provided by flags passed to the create command

Global configuration takes precendence over default behavior, and per-session configuration takes precedence over both. When a session is created, global and per-session configuration are read-in and merged. The merged configuration is "locked in" to the session so that subsequent changes to the ~/.mutagen.toml file will not affect the behavior of existing sessions. This increases safety while removing the cognitive load of having to understand how global configuration changes would propagate.

Mutagen's configuration options are minimal at the moment and the goal is to keep them that way. Configuration parameters are available for symlinks, ignores, and filesystem watching.