webpack.config.js

// -----------------------------------------------------------------------------
// This file is used to build the plugin file (.jpl) and plugin info (.json). It
// is recommended not to edit this file as it would be overwritten when updating
// the plugin framework. If you do make some changes, consider using an external
// JS file and requiring it here to minimize the changes. That way when you
// update, you can easily restore the functionality you've added.
// -----------------------------------------------------------------------------

const path = require("path");
const crypto = require("crypto");
const fs = require("fs-extra");
const chalk = require("chalk");
const CopyPlugin = require("copy-webpack-plugin");
const WebpackOnBuildPlugin = require("on-build-webpack");
const tar = require("tar");
const glob = require("glob");
const execSync = require("child_process").execSync;

const rootDir = path.resolve(__dirname);
const userConfigFilename = "./plugin.config.json";
const userConfigPath = path.resolve(rootDir, userConfigFilename);
const distDir = path.resolve(rootDir, "dist");
const srcDir = path.resolve(rootDir, "src");
const publishDir = path.resolve(rootDir, "publish");

const userConfig = Object.assign(
  {},
  {
    extraScripts: [],
  },
  fs.pathExistsSync(userConfigPath) ? require(userConfigFilename) : {}
);

const manifestPath = `${srcDir}/manifest.json`;
const packageJsonPath = `${rootDir}/package.json`;
const manifest = readManifest(manifestPath);
const pluginArchiveFilePath = path.resolve(publishDir, `${manifest.id}.jpl`);
const pluginInfoFilePath = path.resolve(publishDir, `${manifest.id}.json`);

function validatePackageJson() {
  const content = JSON.parse(fs.readFileSync(packageJsonPath, "utf8"));
  if (!content.name || content.name.indexOf("joplin-plugin-") !== 0) {
    console.warn(
      chalk.yellow(
        `WARNING: To publish the plugin, the package name should start with "joplin-plugin-" (found "${content.name}") in ${packageJsonPath}`
      )
    );
  }

  if (!content.keywords || content.keywords.indexOf("joplin-plugin") < 0) {
    console.warn(
      chalk.yellow(
        `WARNING: To publish the plugin, the package keywords should include "joplin-plugin" (found "${JSON.stringify(
          content.keywords
        )}") in ${packageJsonPath}`
      )
    );
  }

  if (content.scripts && content.scripts.postinstall) {
    console.warn(
      chalk.yellow(
        `WARNING: package.json contains a "postinstall" script. It is recommended to use a "prepare" script instead so that it is executed before publish. In ${packageJsonPath}`
      )
    );
  }
}

function fileSha256(filePath) {
  const content = fs.readFileSync(filePath);
  return crypto.createHash("sha256").update(content).digest("hex");
}

function currentGitInfo() {
  try {
    let branch = execSync("git rev-parse --abbrev-ref HEAD", { stdio: "pipe" })
      .toString()
      .trim();
    const commit = execSync("git rev-parse HEAD", { stdio: "pipe" })
      .toString()
      .trim();
    if (branch === "HEAD") branch = "master";
    return `${branch}:${commit}`;
  } catch (error) {
    const messages = error.message ? error.message.split("\n") : [""];
    console.info(
      chalk.cyan(
        "Could not get git commit (not a git repo?):",
        messages[0].trim()
      )
    );
    console.info(
      chalk.cyan("Git information will not be stored in plugin info file")
    );
    return "";
  }
}

function readManifest(manifestPath) {
  const content = fs.readFileSync(manifestPath, "utf8");
  const output = JSON.parse(content);
  if (!output.id)
    throw new Error(`Manifest plugin ID is not set in ${manifestPath}`);
  return output;
}

function createPluginArchive(sourceDir, destPath) {
  const distFiles = glob
    .sync(`${sourceDir}/**/*`, { nodir: true })
    .map((f) => f.substr(sourceDir.length + 1));

  if (!distFiles.length)
    throw new Error(
      'Plugin archive was not created because the "dist" directory is empty'
    );
  fs.removeSync(destPath);

  tar.create(
    {
      strict: true,
      portable: true,
      file: destPath,
      cwd: sourceDir,
      sync: true,
    },
    distFiles
  );

  console.info(chalk.cyan(`Plugin archive has been created in ${destPath}`));
}

function createPluginInfo(manifestPath, destPath, jplFilePath) {
  const contentText = fs.readFileSync(manifestPath, "utf8");
  const content = JSON.parse(contentText);
  content._publish_hash = `sha256:${fileSha256(jplFilePath)}`;
  content._publish_commit = currentGitInfo();
  fs.writeFileSync(destPath, JSON.stringify(content, null, "\t"), "utf8");
}

function onBuildCompleted() {
  try {
    fs.removeSync(path.resolve(publishDir, "index.js"));
    createPluginArchive(distDir, pluginArchiveFilePath);
    createPluginInfo(manifestPath, pluginInfoFilePath, pluginArchiveFilePath);
    validatePackageJson();
  } catch (error) {
    console.error(chalk.red(error.message));
  }
}

const baseConfig = {
  mode: "production",
  target: "node",
  stats: "errors-only",
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: "ts-loader",
        exclude: /node_modules/,
      },
    ],
  },
};

const pluginConfig = Object.assign({}, baseConfig, {
  entry: "./src/index.ts",
  resolve: {
    alias: {
      api: path.resolve(__dirname, "api"),
    },
    extensions: [".tsx", ".ts", ".js"],
  },
  output: {
    filename: "index.js",
    path: distDir,
  },
  plugins: [
    new CopyPlugin({
      patterns: [
        {
          from: "**/*",
          context: path.resolve(__dirname, "src"),
          to: path.resolve(__dirname, "dist"),
          globOptions: {
            ignore: [
              // All TypeScript files are compiled to JS and
              // already copied into /dist so we don't copy them.
              "**/*.ts",
              "**/*.tsx",
            ],
          },
        },
      ],
    }),
  ],
});

const extraScriptConfig = Object.assign({}, baseConfig, {
  resolve: {
    alias: {
      api: path.resolve(__dirname, "api"),
    },
    extensions: [".tsx", ".ts", ".js"],
  },
});

const createArchiveConfig = {
  stats: "errors-only",
  entry: "./dist/index.js",
  output: {
    filename: "index.js",
    path: publishDir,
  },
  plugins: [new WebpackOnBuildPlugin(onBuildCompleted)],
};

function resolveExtraScriptPath(name) {
  const relativePath = `./src/${name}`;

  const fullPath = path.resolve(`${rootDir}/${relativePath}`);
  if (!fs.pathExistsSync(fullPath))
    throw new Error(`Could not find extra script: "${name}" at "${fullPath}"`);

  const s = name.split(".");
  s.pop();
  const nameNoExt = s.join(".");

  return {
    entry: relativePath,
    output: {
      filename: `${nameNoExt}.js`,
      path: distDir,
      library: "default",
      libraryTarget: "commonjs",
      libraryExport: "default",
    },
  };
}

function buildExtraScriptConfigs(userConfig) {
  if (!userConfig.extraScripts.length) return [];

  const output = [];

  for (const scriptName of userConfig.extraScripts) {
    const scriptPaths = resolveExtraScriptPath(scriptName);
    output.push(
      Object.assign({}, extraScriptConfig, {
        entry: scriptPaths.entry,
        output: scriptPaths.output,
      })
    );
  }

  return output;
}

function main(processArgv) {
  const yargs = require("yargs/yargs");
  const argv = yargs(processArgv).argv;

  const configName = argv["joplin-plugin-config"];
  if (!configName)
    throw new Error(
      "A config file must be specified via the --joplin-plugin-config flag"
    );

  // Webpack configurations run in parallel, while we need them to run in
  // sequence, and to do that it seems the only way is to run webpack multiple
  // times, with different config each time.

  const configs = {
    // Builds the main src/index.ts and copy the extra content from /src to
    // /dist including scripts, CSS and any other asset.
    buildMain: [pluginConfig],

    // Builds the extra scripts as defined in plugin.config.json. When doing
    // so, some JavaScript files that were copied in the previous might be
    // overwritten here by the compiled version. This is by design. The
    // result is that JS files that don't need compilation, are simply
    // copied to /dist, while those that do need it are correctly compiled.
    buildExtraScripts: buildExtraScriptConfigs(userConfig),

    // Ths config is for creating the .jpl, which is done via the plugin, so
    // it doesn't actually need an entry and output, however webpack won't
    // run without this. So we give it an entry that we know is going to
    // exist and output in the publish dir. Then the plugin will delete this
    // temporary file before packaging the plugin.
    createArchive: [createArchiveConfig],
  };

  // If we are running the first config step, we clean up and create the build
  // directories.
  if (configName === "buildMain") {
    fs.removeSync(distDir);
    fs.removeSync(publishDir);
    fs.mkdirpSync(publishDir);
  }

  return configs[configName];
}

let exportedConfigs = [];

try {
  exportedConfigs = main(process.argv);
} catch (error) {
  console.error(chalk.red(error.message));
  process.exit(1);
}

if (!exportedConfigs.length) {
  // Nothing to do - for example where there are no external scripts to
  // compile.
  process.exit(0);
}

module.exports = exportedConfigs;