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| require("./patch");
var estraverse = require("estraverse");
var traverse = require("./traverse");
var acorn = require("acorn-6to5");
var path = require("path");
var util = require("util");
var fs = require("fs");
var t = require("./types");
var _ = require("lodash");
exports.inherits = util.inherits;
exports.canCompile = function (filename, altExts) {
var exts = altExts || [".js", ".jsx", ".es6"];
var ext = path.extname(filename);
return _.contains(exts, ext);
};
exports.resolve = function (loc) {
try {
return require.resolve(loc);
} catch (err) {
return null;
}
};
exports.trimRight = function (str) {
return str.replace(/[\n\s]+$/g, "");
};
exports.list = function (val) {
return val ? val.split(",") : [];
};
exports.getUid = function (parent, file) {
var node;
if (t.isAssignmentExpression(parent)) {
node = parent.left;
} else if (t.isVariableDeclarator(parent)) {
node = parent.id;
}
var id = "ref";
if (t.isIdentifier(node)) id = node.name;
return t.identifier(file.generateUid(id));
};
exports.isAbsolute = function (loc) {
if (!loc) return false;
if (loc[0] === "/") return true; // unix
if (loc[1] === ":" && loc[2] === "\\") return true; // windows
return false;
};
exports.sourceMapToComment = function (map) {
var json = JSON.stringify(map);
var base64 = new Buffer(json).toString("base64");
return "//# sourceMappingURL=data:application/json;base64," + base64;
};
exports.pushMutatorMap = function (mutatorMap, key, kind, method) {
var alias;
Eif (t.isIdentifier(key)) {
alias = key.name;
Iif (method.computed) alias = "computed:" + alias;
} else if (t.isLiteral(key)) {
alias = String(key.value);
} else {
alias = JSON.stringify(traverse.removeProperties(_.cloneDeep(key)));
}
var map;
if (_.has(mutatorMap, alias)) {
map = mutatorMap[alias];
} else {
map = {};
}
mutatorMap[alias] = map;
map._key = key;
Iif (method.computed) {
map._computed = true;
}
map[kind] = method;
};
exports.buildDefineProperties = function (mutatorMap) {
var objExpr = t.objectExpression([]);
_.each(mutatorMap, function (map) {
var mapNode = t.objectExpression([]);
var propNode = t.property("init", map._key, mapNode, map._computed);
_.each(map, function (node, key) {
if (key[0] === "_") return;
node = _.clone(node);
if (t.isMethodDefinition(node)) node = node.value;
mapNode.properties.push(t.property("init", t.identifier(key), node));
});
objExpr.properties.push(propNode);
});
return objExpr;
};
exports.template = function (name, nodes, keepExpression) {
var template = exports.templates[name];
if (!template) throw new ReferenceError("unknown template " + name);
if (nodes === true) {
keepExpression = true;
nodes = null;
}
template = _.cloneDeep(template);
var inherits = false;
if (nodes) {
inherits = nodes.inherits;
delete nodes.inherits;
Eif (!_.isEmpty(nodes)) {
traverse(template, function (node) {
if (t.isIdentifier(node) && _.has(nodes, node.name)) {
var newNode = nodes[node.name];
if (_.isString(newNode)) {
node.name = newNode;
} else {
return newNode;
}
}
});
}
}
var node = template.body[0];
if (!keepExpression && t.isExpressionStatement(node)) {
node = node.expression;
if (t.isParenthesizedExpression(node)) node = node.expression;
}
return node;
};
exports.codeFrame = function (lines, lineNumber, colNumber) {
colNumber = Math.max(colNumber, 0);
lines = lines.split("\n");
var start = Math.max(lineNumber - 3, 0);
var end = Math.min(lines.length, lineNumber + 3);
var width = (end + "").length;
Iif (!lineNumber && !colNumber) {
start = 0;
end = lines.length;
}
return "\n" + lines.slice(start, end).map(function (line, i) {
var curr = i + start + 1;
var gutter = curr === lineNumber ? "> " : " ";
var sep = curr + exports.repeat(width + 1);
gutter += sep + "| ";
var str = gutter + line;
if (colNumber && curr === lineNumber) {
str += "\n";
str += exports.repeat(gutter.length - 2);
str += "|" + exports.repeat(colNumber) + "^";
}
return str;
}).join("\n");
};
exports.repeat = function (width, cha) {
cha = cha || " ";
return new Array(width + 1).join(cha);
};
exports.parse = function (opts, code, callback) {
try {
var comments = [];
var tokens = [];
var ast = acorn.parse(code, {
allowReturnOutsideFunction: true,
preserveParens: true,
ecmaVersion: Infinity,
strictMode: true,
onComment: comments,
locations: true,
onToken: tokens,
ranges: true
});
estraverse.attachComments(ast, comments, tokens);
ast = t.file(ast, comments, tokens);
traverse(ast, function (node, parent) {
node._parent = parent;
});
if (callback) {
return callback(ast);
} else {
return ast;
}
} catch (err) {
Eif (!err._6to5) {
err._6to5 = true;
var message = opts.filename + ": " + err.message;
var loc = err.loc;
Eif (loc) {
var frame = exports.codeFrame(code, loc.line, loc.column);
message += frame;
}
Eif (err.stack) err.stack = err.stack.replace(err.message, message);
err.message = message;
}
throw err;
}
};
exports.parseTemplate = function (loc, code) {
var ast = exports.parse({ filename: loc }, code).program;
return traverse.removeProperties(ast);
};
var loadTemplates = function () {
var templates = {};
var templatesLoc = __dirname + "/templates";
Iif (!fs.existsSync(templatesLoc)) {
throw new Error("no templates directory - this is most likely the " +
"result of a broken `npm publish`. Please report to " +
"https://githut.com/6to5/6to5/issues");
}
_.each(fs.readdirSync(templatesLoc), function (name) {
if (name[0] === ".") return;
var key = path.basename(name, path.extname(name));
var loc = templatesLoc + "/" + name;
var code = fs.readFileSync(loc, "utf8");
templates[key] = exports.parseTemplate(loc, code);
});
return templates;
};
try {
exports.templates = require("../../templates.json");
} catch (err) {
Iif (err.code !== "MODULE_NOT_FOUND") throw err;
Object.defineProperty(exports, "templates", {
get: function () {
return exports.templates = loadTemplates();
}
});
}
|