@pgsql/cli/dist/esm/commands/deparse.js

Unified CLI for PostgreSQL AST parsing, deparsing, and code generation

import { readFileSync, writeFileSync } from 'fs';
import { resolve, join } from 'path';
import { deparse } from 'pgsql-deparser';
import chalk from 'chalk';
import { showHelp } from '../utils/help';
export async function deparseCommand(argv) {
    if (argv.help) {
        showHelp('deparse');
        process.exit(0);
    }
    try {
        let ast;
        // Read AST from file or stdin
        if (argv.input || argv.i) {
            const inputFile = argv.input || argv.i;
            const filePath = inputFile.startsWith('/')
                ? inputFile
                : resolve(join(process.cwd(), inputFile));
            const content = readFileSync(filePath, 'utf-8');
            ast = JSON.parse(content);
        }
        else if (!process.stdin.isTTY) {
            // Read from stdin
            const chunks = [];
            for await (const chunk of process.stdin) {
                chunks.push(chunk);
            }
            const content = Buffer.concat(chunks).toString();
            ast = JSON.parse(content);
        }
        else {
            console.error(chalk.red('Error: No input provided. Use -i <file> or pipe input via stdin'));
            showHelp('deparse');
            process.exit(1);
        }
        // Deparse AST to SQL
        const sql = await deparse(ast);
        // Write output
        if (argv.output || argv.o) {
            const outputFile = argv.output || argv.o;
            writeFileSync(outputFile, sql);
            console.log(chalk.green(`✓ SQL written to ${outputFile}`));
        }
        else {
            process.stdout.write(sql);
        }
    }
    catch (error) {
        if (error.code === 'ENOENT') {
            console.error(chalk.red(`Error: File not found: ${argv.input || argv.i}`));
        }
        else if (error instanceof SyntaxError) {
            console.error(chalk.red('Error: Invalid JSON input'));
        }
        else {
            console.error(chalk.red('Deparse error:'), error.message || error);
        }
        process.exit(1);
    }
}