Code Paths

Path Management

Code Path Contexts:

• deps: Dependency ebins
• plugins: Plugin ebins
• all_deps: All dependencies including project apps

Setting Paths:

rebar_paths:set_paths([deps], State)
rebar_paths:set_paths([deps, plugins], State)

Path Priority

During Compilation:

1. Current application's ebin (prepended)
2. All dependencies' ebins
3. All project apps' ebins
4. Rebar3's own dependencies (controlled)

Erlang Code Path:

• Managed via code:add_patha/1 and code:add_pathz/1
• patha: Front of path (higher priority)
• pathz: End of path (lower priority)

Include Path Resolution

-include_lib("app/include/file.hrl") Resolution:

1. Find app in code path
2. Look for include/file.hrl relative to app directory

Example:

% In code:
-include_lib("cowboy/include/cowboy.hrl").

% Resolves to:
_build/default/lib/cowboy/include/cowboy.hrl