Path Resolution

Source Directories

Default Source Directories:

{src_dirs, ["src"]}.

Multiple Source Directories:

{src_dirs, ["src", "lib", "core"]}.

Recursive Source Directories:

{src_dirs, [
    "src",
    {"lib", [{recursive, true}]}
]}.

Include Directories

Include Path Priority (for rebar_compiler_erl):

1. Application's include/ directory
2. Directories from {i, Dir} in erl_opts
3. All source directories (recursively if configured)
4. Top-level application directory
5. All project apps' include directories (during compilation)

Example:

{erl_opts, [
    {i, "custom_include"},
    {i, "/absolute/path/include"}
]}.

Output Directories

Application Output: _build/PROFILE/lib/APPNAME/

• Mirrors source structure
• ebin/: Compiled artifacts
• priv/: Copied private resources
• include/: Available to other apps

Dependency Output: _build/PROFILE/lib/DEPNAME/

• Same structure as application output
• Fetched from cache or remote

Library Directories

lib_dirs Configuration:

{lib_dirs, ["apps", "components"]}.

Purpose: Where to find application directories during discovery

Default: [] (only scan project root)

Extra Source Directories

Configuration:

{extra_src_dirs, ["test", "scripts"]}.

Output: _build/PROFILE/extras/DIRNAME/

Module List: Not included in .app file