NAME¶
Makefile::AST - AST for (GNU) makefiles
DESCRIPTION¶
The structure of this (GNU) makefile AST is designed based on GNU make's data
base listing output produced by "--print-data-base".
This AST library provides the following classes:
- Makefile::AST
- The primary class for ASTs. Provides interface for node
adding and querying, such as "add_implicit_rule",
"apply_implicit_rules", "add_explicit_rule",
"apply_explicit_rules", "add_var",
"add_auto_var", "get_var", as well as lots of other
utility functions, like method "eval_var_value" for computing
the ultimate values of makefile variables, method "enter_pad"
and "leave_pad" for local variable's scoping pad.
- Makefile::AST::Rule::Base
- This is the base class for the rule nodes in the AST. It
has properties like "normal_prereqs", "order_prereqs",
"commands", and "colon".
- Makefile::AST::Rule
- This class represents the de-sugared form of simple rules
and implicite rules after application. It inherits from
Makefile::AST::Rule::Base, and adds new properties "target" and
"other_targets".
- Makefile::AST::Rule::Implicit
- This class represents the implicit rule nodes in the AST.
It inherits from Makefile::AST::Rule::Base, and adds new properties
"targets", "match_anything", and
"is_terminal".
- Makefile::AST::StemMatch
- This class encapsulates the file pattern matching (file
names containing "%") and stem substitution algorithms.
- Makefile::AST::Variable
- It represents the makefile variable nodes in the AST,
including "name", "value", "flavor", and
"origin".
- Makefile::AST::Command
- Used to encapsulate information regarding makefile rule
commands (e.g. command body, command modifiers "@",
"-", "+", and etc.) as a whole.
LIMITATIONS AND TODO¶
Adding support for other flavors' makes into this AST library should make a huge
amount of sense. The most interesting candiate is Microsoft's NMAKE.
CODE REPOSITORY¶
For the very latest version of this script, check out the source from
http://github.com/agentzh/makefile-parser-pm
<
http://github.com/agentzh/makefile-parser-pm>.
There is anonymous access to all.
AUTHOR¶
Zhang "agentzh" Yichun "<agentzh@gmail.com>"
COPYRIGHT AND LICENSE¶
Copyright (c) 2007-2008 by Zhang "agentzh" Yichun (agentzh).
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
SEE ALSO¶
Makefile::AST::Evaluator, Makefile::Parser::GmakeDB, makesimple, pgmake-db,
Makefile::DOM.