mirror of https://gitee.com/antv-l7/antv-l7
100 lines
2.2 KiB
JavaScript
100 lines
2.2 KiB
JavaScript
var types = require("./lib/types");
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var parse = require("./lib/parser").parse;
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var Printer = require("./lib/printer").Printer;
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function print(node, options) {
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return new Printer(options).print(node);
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}
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function prettyPrint(node, options) {
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return new Printer(options).printGenerically(node);
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}
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function run(transformer, options) {
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return runFile(process.argv[2], transformer, options);
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}
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function runFile(path, transformer, options) {
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require("fs").readFile(path, "utf-8", function(err, code) {
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if (err) {
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console.error(err);
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return;
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}
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runString(code, transformer, options);
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});
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}
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function defaultWriteback(output) {
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process.stdout.write(output);
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}
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function runString(code, transformer, options) {
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var writeback = options && options.writeback || defaultWriteback;
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transformer(parse(code, options), function(node) {
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writeback(print(node, options).code);
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});
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}
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Object.defineProperties(exports, {
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/**
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* Parse a string of code into an augmented syntax tree suitable for
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* arbitrary modification and reprinting.
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*/
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parse: {
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enumerable: true,
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value: parse
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},
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/**
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* Traverse and potentially modify an abstract syntax tree using a
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* convenient visitor syntax:
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*
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* recast.visit(ast, {
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* names: [],
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* visitIdentifier: function(path) {
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* var node = path.value;
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* this.visitor.names.push(node.name);
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* this.traverse(path);
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* }
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* });
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*/
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visit: {
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enumerable: true,
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value: types.visit
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},
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/**
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* Reprint a modified syntax tree using as much of the original source
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* code as possible.
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*/
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print: {
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enumerable: true,
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value: print
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},
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/**
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* Print without attempting to reuse any original source code.
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*/
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prettyPrint: {
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enumerable: false,
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value: prettyPrint
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},
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/**
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* Customized version of require("ast-types").
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*/
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types: {
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enumerable: false,
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value: types
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},
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/**
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* Convenient command-line interface (see e.g. example/add-braces).
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*/
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run: {
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enumerable: false,
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value: run
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}
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});
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