How to use the cat function from shelljs

Find comprehensive JavaScript shelljs.cat code examples handpicked from public code repositorys.

The shelljs.cat method reads files and writes their content to standard output.

set-rn-version.js

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  'utf-8',
);


fs.writeFileSync(
  'packages/react-native/React/Base/RCTVersion.m',
  cat('scripts/versiontemplates/RCTVersion.m.template')
    .replace('${major}', `@(${major})`)
    .replace('${minor}', `@(${minor})`)
    .replace('${patch}', `@(${patch})`)
    .replace(

+ 19 other calls in file

Makefile.js

GitHub: strong6208/eslint

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let errors = 0;

RULE_FILES.forEach(filename => {
    const basename = path.basename(filename, ".js");
    const docFilename = `docs/src/rules/${basename}.md`;
    const docText = cat(docFilename);
    const docTextWithoutFrontmatter = matter(String(docText)).content;
    const docMarkdown = marked.lexer(docTextWithoutFrontmatter, { gfm: true, silent: false });
    const ruleCode = cat(filename);
    const knownHeaders = ["Rule Details", "Options", "Environments", "Examples", "Known Limitations", "When Not To Use It", "Compatibility"];

+ 59 other calls in file

How does shelljs.cat work?

shelljs.cat() is a function in the ShellJS library that reads and returns the contents of a file, or multiple files if provided as arguments, as a string or an array of strings. It supports file path expansion and globbing. It can also write the contents of the files to the console or a file if the -u or -o options are used.

Makefile.js

GitHub: Sonarqube-Testing/javascript-test

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    baseName = path.basename(filename),
    sourceBaseName = `${path.basename(filename, ".md")}.js`,
    sourcePath = path.join("lib/rules", sourceBaseName),
    ruleName = path.basename(filename, ".md"),
    filePath = path.join("docs", path.relative("tmp", filename));
let text = cat(filename),
    ruleType = "",
    title;

process.stdout.write(`> Updating files (Steps 4-9): ${i}/${length} - ${filePath + " ".repeat(30)}\r`);

+ 38 other calls in file

ci-setup-frontend-for-testnet.js

GitHub: peterpan0225/NFT-RPG_GAME

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const shell = require('shelljs');
const path = require('path');


shell.pushd(path.join(__dirname, '../frontend'));


if(shell.test('-f', '.env.production.local') && shell.cat('.env.production.local').toString() !== shell.cat('.env.testnet').toString()) {
    console.log('ERROR: .env.production.local already exists and is not equal to .env.testnet.');
    console.log('Delete .env.production.local and try again.');
    shell.exit(1);
}

Ai Example

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const shell = require("shelljs");

// Display contents of a file
const fileContent = shell.cat("example.txt");
console.log(fileContent);

In this example, the shelljs.cat() method is used to read the contents of the file example.txt and store them in the fileContent variable. The console.log() method is then used to display the contents of the file in the console.

ci-setup-frontend-for-mainnet.js

GitHub: peterpan0225/NFT-RPG_GAME

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const shell = require('shelljs');
const path = require('path');


shell.pushd(path.join(__dirname, '../frontend'));


if(shell.test('-f', '.env.production.local') && shell.cat('.env.production.local').toString() !== shell.cat('.env.mainnet').toString()) {
    console.log('ERROR: .env.production.local already exists and is not equal to .env.mainnet.');
    console.log('Delete .env.production.local and try again.');
    shell.exit(1);
}

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