151 lines
4.3 KiB
JavaScript
151 lines
4.3 KiB
JavaScript
#!/usr/bin/env node
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"use strict";
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import fs from "fs";
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import _module from "module";
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import { resolve } from "path";
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import { assemble, disassemble, formatBytecode, parse } from "@ethersproject/asm";
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import { ArgParser, CLI, Help, Plugin } from "../cli";
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function repeat(text: string, length: number): string {
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if (text.length === 0) { throw new Error("boo"); }
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let result = text;
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while (result.length < length) {
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result += result;
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}
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return result.substring(0, length);
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}
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let cli = new CLI(null, {
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account: false,
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provider: false,
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transaction: false
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});
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class AssemblePlugin extends Plugin {
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filename: string;
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content: string;
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disassemble: boolean;
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defines: { [ key: string ]: string | boolean }
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static getHelp(): Help {
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return {
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name: "[ FILENAME ]",
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help: "Process the file (or stdin)"
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};
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}
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static getOptionHelp(): Array<Help> {
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return [
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{
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name: "--disassemble",
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help: "Disassemble input bytecode"
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},
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{
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name: "--define KEY=VALUE",
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help: "provide assembler defines"
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}
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];
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}
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async prepareOptions(argParser: ArgParser): Promise<void> {
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await super.prepareOptions(argParser);
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// Get all the --define key=value pairs
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this.defines = { };
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argParser.consumeOptions("define").forEach((pair) => {
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const match = pair.match(/([a-z][a-z0-9_]+)(=.*)?/i);
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if (!match) {
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this.throwError(`invalid define: ${ pair }`);
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}
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this.defines[match[1]] = (match[2] ? match[2].substring(1): true);
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});
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// We are disassembling...
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this.disassemble = argParser.consumeFlag("disassemble");
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}
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async prepareArgs(args: Array<string>): Promise<void> {
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await super.prepareArgs(args);
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if (args.length > 1) {
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this.throwError("assembler requires at most one FILENAME");
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} else if (args.length === 1) {
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this.filename = resolve(args[0]);
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this.content = fs.readFileSync(this.filename).toString();
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} else {
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this.content = await (new Promise((resolve, reject) => {
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let data = "";
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process.stdin.setEncoding('utf8');
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process.stdin.on("data", (chunk) => {
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data += chunk;
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});
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process.stdin.on("end", () => {
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resolve(data);
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});
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process.stdin.on("error", (error) => {
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reject(error);
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});
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}));
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}
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if (this.disassemble) {
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const bytecodes: Array<string> = [ ];
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const leftovers = this.content.replace(/(?:(?:0x)?((:?[0-9a-f][0-9a-f])*))/gi, (all, bytecode) => {
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bytecodes.push(bytecode);
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return repeat(" ", all.length);
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});
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if (leftovers.trim()) {
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// Process the leftovers
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const chunks = leftovers.split(/(\s+)/);
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const offset = (chunks[0] ? 0: chunks[1].length);
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const column = (chunks[0] ? 0: chunks[1].split(/[\r\n]/).pop().length);
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// Count the lines in the prefix
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const prefix = this.content.substring(0, offset);
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const lineNo = prefix.length - prefix.replace(/\r|\n|\r\n/g, '').length;
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// Get teh actual error line
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const line = this.content.substring(offset - column).split(/\n/)[0];
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// Formatted output line
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let output = `Invalid Bytecode Character found in line ${ lineNo + 1 }, column ${ column + 1 }\n`;
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output += line + "\n";
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output += repeat("-", column) + "^";
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this.throwError(output);
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}
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this.content = "0x" + bytecodes.join("");
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}
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}
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async run(): Promise<void> {
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if (this.disassemble) {
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console.log(formatBytecode(disassemble(this.content)));
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} else {
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console.log(await assemble(parse(this.content), {
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defines: this.defines,
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filename: this.filename,
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}));
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}
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}
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}
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cli.setPlugin(AssemblePlugin);
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cli.run(process.argv.slice(2))
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