tronbox/build/components/Resolver/epm.js

TronBox - Simple development framework for Tron

"use strict";var path=require("path");var fs=require("fs");function EPM(working_directory,contracts_build_directory){this.working_directory=working_directory;this.contracts_build_directory=contracts_build_directory}EPM.prototype.require=function(import_path){if(import_path.indexOf(".")===0||import_path.indexOf("/")===0){return null}var contract_name=path.basename(import_path,".sol");var separator=import_path.indexOf("/");var package_name=import_path.substring(0,separator);var install_directory=path.join(this.working_directory,"installed_contracts");var lockfile=path.join(install_directory,package_name,"lock.json");try{lockfile=fs.readFileSync(lockfile,"utf8")}catch(e){return null}lockfile=JSON.parse(lockfile);var json={contract_name:contract_name,networks:{}};var contract_types=lockfile.contract_types||{};var type=contract_types[contract_name];if(!type)return null;json.abi=type.abi;json.unlinked_binary=type.bytecode;Object.keys(lockfile.deployments||{}).forEach(function(blockchain){var deployments=lockfile.deployments[blockchain];Object.keys(deployments).forEach(function(name){var deployment=deployments[name];if(deployment.contract_type===contract_name){json.networks[blockchain]={events:{},links:{},address:deployment.address}}})});return json};EPM.prototype.resolve=function(import_path,imported_from,callback){var separator=import_path.indexOf("/");var package_name=import_path.substring(0,separator);var internal_path=import_path.substring(separator+1);var installDir=this.working_directory;var body;while(true){var file_path=path.join(installDir,"installed_contracts",import_path);try{body=fs.readFileSync(file_path,{encoding:"utf8"});break}catch(err){}file_path=path.join(installDir,"installed_contracts",package_name,"contracts",internal_path);try{body=fs.readFileSync(file_path,{encoding:"utf8"});break}catch(err){}var oldInstallDir=installDir;installDir=path.join(installDir,"..");if(installDir===oldInstallDir){break}}return callback(null,body,import_path)},EPM.prototype.resolve_dependency_path=function(import_path,dependency_path){var dirname=path.dirname(import_path);var resolved_dependency_path=path.join(dirname,dependency_path);resolved_dependency_path=resolved_dependency_path.replace(/\\/g,"/");return resolved_dependency_path};module.exports=EPM;