@netlify/git-utils/lib/diff.js

Utility for dealing with modified, created, deleted files since a git commit

import { git } from './exec.js';
// Return the list of modified|created|deleted files according to git, between
// the `base` commit and the `HEAD`
export const getDiffFiles = function (base, head, cwd) {
    const stdout = git(['diff', '--name-status', '--no-renames', `${base}...${head}`], cwd);
    const files = stdout.split('\n').map(getDiffFile).filter(Boolean);
    const modifiedFiles = getFilesByType(files, 'M');
    const createdFiles = getFilesByType(files, 'A');
    const deletedFiles = getFilesByType(files, 'D');
    return { modifiedFiles, createdFiles, deletedFiles };
};
// Parse each `git diff` line
const getDiffFile = function (line) {
    const result = DIFF_FILE_REGEXP.exec(line);
    // Happens for example when `base` is invalid
    if (result === null) {
        return;
    }
    const [, type, filepath] = result;
    return { type, filepath };
};
const DIFF_FILE_REGEXP = /([ADM])\s+(.*)/;
const getFilesByType = function (files, type) {
    return files.filter((file) => file.type === type).map(getFilepath);
};
const getFilepath = function ({ filepath }) {
    return filepath;
};