peg-cmake

peg-cmake is a simple CMake parser written in javascript. It aims to provide a core lib for tools such as formatting, refactoring, etc...

The library is under developement and not stable.

Usage

npm install peg-cmake

var CMake = require('peg-cmake');
var fs = require('fs');

function traversAST(ast, matcher) {
   ast.forEach((element)=>{
       if(matcher[element.type])
       matcher[element.type](element);
   });
}

fs.readFile('CMakeLists.txt', 'utf8', function (err,data) {
 if (!err) {
   try {
       var ast = CMake.parse(data);
       // print all functions defined in the script
       function FunctionsVisitor() {
             this._func = (elt)=>{
              console.log("- " +elt.identifier + " : line:" + elt.location.start.line )
             }
             this.macro = this._func;
             this.function = this._func;
             this.if=(elt)=>{
               traversAST(elt.body, this);
               elt.elseif.foreach((e)=>{traversAST(elt.body, this);});      
               if(elt.else)traversAST(elt.else.body, this);
             }
       };
       traversAST(result, new FindFunctions());
   }catch(e) {
       console.log(e.name + " line " + e.location.start.line 
       + ", " + e.location.start.column
       + "\n"+ e.message);
   }
 }
});

AST

The the parse result is an array of node. Each node owns at least a type which can be one of the following :

• "bracket_argument"
• "bracket_comment"
• "command_invocation"
• "foreach"
• "function"
• "identifier"
• "if"
• "line_comment"
• "macro"
• "newline"
• "quoted_argument"
• "script"
• "unquoted_argument"
• "while"

and a location :

   {
       "start": {
           "offset": 31,
           "line": 1,
           "column": 32
       },
      "end": {
           "offset": 43,
           "line": 1,
           "column": 44
       }
   }

message("1st Arg\n" #[[Bracket Comment]] "2nd Arg")

Release notes

0.0.6

• fix :

CMake versions prior to 2.8.12 silently accept an Unquoted Argument or a Quoted Argument immediately following a Quoted Argument and not separated by any whitespace. For compatibility, CMake 2.8.12 and higher accept such code but produce a warning.

• add experimental cmake formater

Known Issues

• Thes buffer must end with "\n", as a workaround the parse function append a new line to the buffer passed as argument.