nx/src/utils/git-utils.tree-filter.js

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

/**
 * This is meant to be used with `git filter-branch --tree-filter` to rewrite
 * history to only include commits related to the source project folder. If the
 * destination folder is different, this script also moves the files over.
 *
 * Example:
 * NX_IMPORT_SOURCE=<source> NX_IMPORT_DESTINATION=<destination> git filter-branch --tree-filter 'node git-utils.tree-filter.js' --prune-empty -- --all
 */
const { execSync } = require('child_process');
const { existsSync, mkdirSync, renameSync, rmSync } = require('fs');
// NOTE: The path passed to `git filter-branch` is POSIX, so we need to use the `posix` module.
const { posix } = require('path');
try {
    // NOTE: Using env vars because Windows PowerShell has its own handling of quotes (") messes up quotes in args, even if escaped.
    const src = process.env.NX_IMPORT_SOURCE;
    const dest = process.env.NX_IMPORT_DESTINATION;
    const files = execSync(`git ls-files -z ${src}`, {
        windowsHide: false,
    })
        .toString()
        .trim()
        .split('\x00')
        .map((s) => s.trim())
        .filter(Boolean);
    for (const file of files) {
        if (src === '' || file.startsWith(src)) {
            // If source and destination are the same, then keep the file as is.
            if (src === dest)
                continue;
            const destFile = posix.join(dest, file.replace(src, ''));
            const dir = posix.dirname(destFile);
            if (!existsSync(dir))
                mkdirSync(dir, { recursive: true });
            renameSync(file, destFile);
        }
        else {
            // If not matching the source we are filtering, remove it.
            rmSync(file);
        }
    }
}
catch (error) {
    console.error(`Error executing Git commands: ${error}`);
    process.exit(1);
}