esp-idf/.github/dangerjs/prCommitsTooManyCommits.ts

import { DangerDSLType, DangerResults } from "danger";
declare const danger: DangerDSLType;
declare const message: (message: string, results?: DangerResults) => void;

/**
 * Check if pull request has not an excessive numbers of commits (if squashed)
 *
 * @dangerjs INFO
 */
export default function (): void {
    const tooManyCommitThreshold: number = 2; // above this number of commits, squash commits is suggested
    const prCommits: number = danger.github.commits.length;

    if (prCommits > tooManyCommitThreshold) {
        return message(
            `You might consider squashing your ${prCommits} commits (simplifying branch history).`
        );
    }
}