@mariozechner/pi-coding-agent/dist/utils/mime.js

Coding agent CLI with read, bash, edit, write tools and session management

import { open } from "node:fs/promises";
import { fileTypeFromBuffer } from "file-type";
const IMAGE_MIME_TYPES = new Set(["image/jpeg", "image/png", "image/gif", "image/webp"]);
const FILE_TYPE_SNIFF_BYTES = 4100;
export async function detectSupportedImageMimeTypeFromFile(filePath) {
    const fileHandle = await open(filePath, "r");
    try {
        const buffer = Buffer.alloc(FILE_TYPE_SNIFF_BYTES);
        const { bytesRead } = await fileHandle.read(buffer, 0, FILE_TYPE_SNIFF_BYTES, 0);
        if (bytesRead === 0) {
            return null;
        }
        const fileType = await fileTypeFromBuffer(buffer.subarray(0, bytesRead));
        if (!fileType) {
            return null;
        }
        if (!IMAGE_MIME_TYPES.has(fileType.mime)) {
            return null;
        }
        return fileType.mime;
    }
    finally {
        await fileHandle.close();
    }
}
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