dialyzer-configuration

Configure Dialyzer by setting up analysis flags, specifying a Persistent Lookup Table (PLT), and defining which warnings to ignore in mix.exs or .dialyzer_ignore.exs. Dialyzer performs static analysis to identify type mismatches, unreachable code, and unnecessary tests without running your code.

A PLT (Persistent Lookup Table) caches type information for your dependencies. Dialyzer requires PLT setup—specifying plt_file, plt_core_path, and plt_add_apps—to analyze your code efficiently. Proper PLT management speeds up subsequent type-checking runs.

Configure Dialyzer in your CI environment by automating type checks through mix.exs settings, managing ignored warnings with dialyzer.ignore-warnings, and running Dialyzer as a build step. This catches type errors before deployment without manual intervention.

Yes, Dialyzer supports filtering warnings through ignore_warnings configuration, .dialyzer_ignore.exs files, and list_unused_filters settings. You can suppress false positives or known limitations while maintaining type-checking on critical code paths.

Dialyzer identifies type errors, unreachable code paths, and unnecessary test assertions. Configuration flags control which analysis categories run, letting you balance coverage depth against build time and false-positive rates.