nx/dist/src/utils/chunkify.js

The core Nx plugin contains the core functionality of Nx like the project graph, nx commands and task orchestration.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.chunkify = chunkify;
exports.getMaxArgLength = getMaxArgLength;
const TERMINAL_SIZE = getMaxArgLength();
function chunkify(target, maxChunkLength = TERMINAL_SIZE - 500, 
/**
 * How long each entry will be once it reaches the command line. Callers that
 * quote or escape afterwards pass that transformation's length here, so the
 * chunk is sized against what is actually spawned rather than the raw string.
 */
measure = (item) => item.length) {
    const chunks = [];
    let currentChunk = [];
    let currentChunkLength = 0;
    for (const file of target) {
        const length = measure(file);
        if (
        // Prevent empty chunk if first file path is longer than maxChunkLength
        currentChunk.length &&
            // +1 accounts for the space between file names
            currentChunkLength + length + 1 >= maxChunkLength) {
            chunks.push(currentChunk);
            currentChunk = [];
            currentChunkLength = 0;
        }
        currentChunk.push(file);
        currentChunkLength += length + 1;
    }
    chunks.push(currentChunk);
    return chunks;
}
/**
 * Get the maximum length of a command-line argument string based on current platform
 *
 * https://serverfault.com/questions/69430/what-is-the-maximum-length-of-a-command-line-in-mac-os-x
 * https://support.microsoft.com/en-us/help/830473/command-prompt-cmd-exe-command-line-string-limitation
 * https://unix.stackexchange.com/a/120652
 *
 * Taken from: https://github.com/lint-staged/lint-staged/blob/adf50b00669f6aac2eeca25dd28ff86a9a3c2a48/lib/index.js#L21-L37
 */
function getMaxArgLength() {
    switch (process.platform) {
        case 'darwin':
            return 262144;
        case 'win32':
            return 8191;
        default:
            return 131072;
    }
}