File Pattern	Purpose	When
src/**/*.erl	Source files	Compilation
src/**/*.yrl	Parser specs	Before .erl compilation
src/**/*.xrl	Lexer specs	Before .erl compilation
src/**/*.mib	MIB files	SNMP compilation
include/**/*.hrl	Header files	Dependency scanning
DAG files	Cached dependencies	Start of compilation

File Pattern	Source	Compiler
ebin/*.beam	.erl	rebar_compiler_erl
src/*.erl	.yrl	rebar_compiler_yrl
src/*.erl	.xrl	rebar_compiler_xrl
priv/mibs/*.bin	.mib	rebar_compiler_mib
include/*.hrl	.mib	rebar_compiler_mib
.rebar3/COMPILER/*.dag	-	All compilers (DAG cache)

Directory	Purpose
_build/PROFILE/lib/APP/ebin/	Compiled .beam files
_build/PROFILE/lib/APP/priv/	Private resources
_build/PROFILE/extras/DIR/	Extra source dirs output
_build/PROFILE/.rebar3/COMPILER/	DAG cache storage