Ace CLI batch processing (folder of EPUB files)

node ace.js "./RELATIVE/OR/ABSOLUTE/PATH/TO/EPUBS/" --verbose

(the --verbose command line argument is optional)

Note that this utility script only processes EPUB files located at the root of the designated folder (i.e. ./RELATIVE/OR/ABSOLUTE/PATH/TO/EPUBS/ in the example above), publications inside subfolders are ignored.

By default, the following command line arguments are used (they can be modified at the top of the ace.js script):

• --outdir ace-reports (this tells Ace to generate reports in a local folder named ace-reports)
• --subdir (this asks Ace to create subfolders for each publication inside the main report folder)
• --force (this instructs Ace to overwrite the contents of existing report folders, if any)

CLI Command Line Interface documentation: https://daisy.github.io/ace/docs/cli/#options

Note that a 1 second pause is added between each EPUB evaluation. This can be configured at the top of the ace.js script (the recommended minimum is 200 milliseconds):

const ACE_ARGS = ["--force", "--outdir", "ace-reports", "--subdir"]; // --verbose, --lang en, etc.
const PAUSE = 1000; // milliseconds

// sudo npm install --unsafe-perm=true -g @daisy/ace

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

const execFile = util.promisify(require('child_process').execFile);

(async () => {

console.log(`=== PROCESS ARGS: `, JSON.stringify(process.argv, null, 4));

const dirPath = path.normalize(path.resolve(fs.existsSync(process.argv[2]) ? process.argv[2] : path.join(process.cwd(), process.argv[2])));

console.log(`=== DIR PATH: `, dirPath);

const epubFiles = fs.readdirSync(dirPath, { withFileTypes: true })
    .filter(dirent => dirent.isFile() && path.extname(dirent.name) === ".epub")
    .map(dirent => path.join(dirPath, dirent.name));

console.log(`=== EPUB FILES: `, JSON.stringify(epubFiles, null, 4));

const sep = "#".repeat(100);
for (const epubFile of epubFiles) {
    console.log(sep);
    console.log(sep);
    console.log(sep);
    console.log(`=== EPUB FILE: [${epubFile}]`);

    const args = process.argv.slice(3).concat(ACE_ARGS, [epubFile]);
    console.log(`=== ACE ARGS: `, JSON.stringify(args, null, 4));

    try {
        const { stdout, stderr } = await execFile('ace', args);
        console.log(stdout);
        console.log(stderr);
    } catch (err) {
        console.log(err.stdout);
        console.log(err.stderr);
        delete err.stdout;
        delete err.stderr;
        console.log(`=== ACE ERROR: `, err);
    }

    await new Promise((resolve, reject) => {setTimeout(() => {resolve();}, PAUSE);});
}

})();