scai/dist/utils/vscode.js

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import fs from "fs";
import os from "os";
import path from "path";
import { spawn } from "child_process";
/**
 * Opens a visual diff in VS Code between the original and modified versions.
 *
 * @param filePath - The path or name of the file being diffed.
 * @param diffContent - The unified diff text for that file.
 */
export async function openDiffInVSCode(filePath, diffContent) {
    try {
        const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "scai-diff-"));
        // Temporary file paths
        const baseName = path.basename(filePath);
        const originalPath = path.join(tmpDir, `${baseName}_OLD.tmp`);
        const modifiedPath = path.join(tmpDir, `${baseName}_NEW.tmp`);
        // Extract file versions from unified diff
        const oldLines = [];
        const newLines = [];
        for (const line of diffContent.split("\n")) {
            if (line.startsWith("+") && !line.startsWith("+++")) {
                newLines.push(line.slice(1));
            }
            else if (line.startsWith("-") && !line.startsWith("---")) {
                oldLines.push(line.slice(1));
            }
            else if (!line.startsWith("@@")) {
                // context lines appear in both versions
                oldLines.push(line);
                newLines.push(line);
            }
        }
        fs.writeFileSync(originalPath, oldLines.join("\n"), "utf-8");
        fs.writeFileSync(modifiedPath, newLines.join("\n"), "utf-8");
        console.log(`\n🔍 Opening VS Code diff:`);
        console.log(`   ${originalPath}`);
        console.log(`⇄  ${modifiedPath}\n`);
        const child = spawn("code", ["--diff", originalPath, modifiedPath], {
            stdio: "inherit",
        });
        child.on("error", () => {
            console.error("❌ Failed to open diff in VS Code. Ensure the 'code' CLI is installed and in your PATH.");
        });
    }
    catch (err) {
        console.error("❌ Error while preparing diff for VS Code:", err);
    }
}