ethereum - Solidity:如何在 compile.js 文件中编译多个智能合约？

Question

我想在一个 compile.js 文件中编译多个契约(Contract)，但我不知道该怎么做。

我的 compile.js 文件与单个契约(Contract)如下所示:

const path = require('path');
const fs = require('fs');
const solc = require('solc');

const lotteryPath = path.resolve(__dirname, 'contracts', 'Lottery.sol');

const source = fs.readFileSync(lotteryPath, 'utf8');

module.exports = solc.compile(source, 1);

如何向 compile.js 文件中添加更多合约？我知道必须将1更改为契约(Contract)数量，但不确定还需要什么？

Answer 1

这是我做的一个例子。您可以在 my public repo 中找到它.简而言之，我有一个“build”文件夹，我将每个编译合约的输出写入 Json 文件。

const path = require("path"); //nodejs ’path’ module
    const solc = require("solc"); //solidity compiler module
    const fs = require("fs-extra"); //file system module

    // Feth path of build
    const buildPath = path.resolve(__dirname, "build");
    const contractspath = path.resolve(__dirname, "contracts");

    // Removes folder build and every file in it
    fs.removeSync(buildPath);

    // Fetch all Contract files in Contracts folder
    const fileNames = fs.readdirSync(contractspath);

    // Gets ABI of all contracts into variable input
    const input = fileNames.reduce(
      (input, fileName) => {
        const filePath = path.resolve(__dirname, "contracts", fileName);
        const source = fs.readFileSync(filePath, "utf8");
        return { sources: { ...input.sources, [fileName]: source } };
      },
      { sources: {} }
    );

    // Compile all contracts
    const output = solc.compile(input, 1).contracts;

    // Re-Create build folder for output files from each contract
    fs.ensureDirSync(buildPath);

    // Output contains all objects from all contracts
    // Write the contents of each to different files
    for (let contract in output) {
      fs.outputJsonSync(
        path.resolve(buildPath, contract.split(":")[1] + ".json"),
        output[contract]
      );
    }

基本上，如果您不将路径结构更改为我的，则必须更改上述代码的这一部分:

// Feth path of build
        const buildPath = path.resolve(__dirname, "build");
        const contractspath = path.resolve(__dirname, "contracts");