move-prop-types/build/updateFile.js

"Help quickly replace the prop type checker in older react projects to map to prop-types"

#!/usr/bin/env node
import { readFile, writeFile } from 'fs/promises';
const fileName = process.argv.slice(2)[0];
if (!fileName) {
    console.error('Error: Please provide a filename');
    process.exit(1);
}
try {
    const data = await readFile(fileName, 'utf-8');
    // Check if shebang already exists
    if (data.startsWith('#!/usr/bin/env node')) {
        console.log(`${fileName} already has shebang`);
    }
    else {
        const result = `#!/usr/bin/env node\n${data}`;
        await writeFile(fileName, result, 'utf8');
        console.log(`Updated ${fileName} with shebang`);
    }
}
catch (err) {
    const errorMessage = err instanceof Error ? err.message : String(err);
    console.error('Error updating file:', errorMessage);
    process.exit(1);
}
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