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

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

import { env } from 'process';
import { git } from './exec.js';
// Retrieve the `head` commit
export const getHead = function (cwd, head = 'HEAD') {
    const result = checkRef(head, cwd);
    if (result.error !== undefined) {
        throwError('head', result);
    }
    return result.ref;
};
// Retrieve the `base` commit
export const getBase = function (base, head, cwd) {
    const refs = getBaseRefs(base, head);
    const { ref } = findRef(refs, cwd);
    return ref;
};
const getBaseRefs = function (base, head) {
    if (base !== undefined) {
        return [base];
    }
    if (env.CACHED_COMMIT_REF) {
        return [env.CACHED_COMMIT_REF];
    }
    // Some git repositories are missing `master` or `main` branches, so we also try HEAD^.
    // We end with HEAD as a failsafe.
    return ['main', 'master', `${head}^`, head];
};
// Use the first commit that exists
const findRef = function (refs, cwd) {
    const results = refs.map((ref) => checkRef(ref, cwd));
    const result = results.find(refExists);
    if (result === undefined) {
        throwError('base', results[0]);
    }
    return result;
};
// Check if a commit exists
const checkRef = function (ref, cwd) {
    try {
        git(['rev-parse', ref], cwd);
        return { ref };
    }
    catch (error) {
        return { ref, error };
    }
};
const refExists = function ({ error }) {
    return error === undefined;
};
const throwError = function (name, { ref, error, }) {
    const messages = [error === null || error === void 0 ? void 0 : error.message, error === null || error === void 0 ? void 0 : error.stderr].filter(Boolean).join('\n');
    const messageA = `Invalid ${name} commit ${ref}\n${messages}`;
    throw new Error(messageA);
};