NoFixup!

Disable the merge pull request button when fixup! commits exist in the current PR and haven't been squashed yet and hide the "Update branch" button.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         NoFixup!
// @namespace    http://www.budw.in/
// @version      0.3.2
// @description  Disable the merge pull request button when fixup! commits exist in the current PR and haven't been squashed yet and hide the "Update branch" button.
// @author       Drew Budwin
// @match        http*://github.com/*
// @require      https://code.jquery.com/jquery-2.2.1.js
// @require      https://greasyfork.org/scripts/6250-waitforkeyelements/code/waitForKeyElements.js?version=23756
// @grant        GM_log
// ==/UserScript==
/* jshint -W097 */
/* globals $:false */
/* global waitForKeyElements */
'use strict';

waitForKeyElements (".merge-message", disableMergeButton);
waitForKeyElements (".branch-action-item", hideUpdateBranchButton);

function hideUpdateBranchButton()
{    
    var updateBranchButton = $('button:contains("Update branch")').hide();
    
    if (updateBranchButton !== null)
    {        
        updateBranchButton.hide();
    }
    else
    {
        console.log("WARNING: Can't locate active update branch button on page!");
    }
}

function disableMergeButton()
{
    var mergeButton = $('button:contains("Merge pull request")');

    if (mergeButton !== null && doesPRContainFixupCommits())
    {        
        mergeButton.text("Are there fixup! commits?");
        mergeButton.prop("disabled", true);
    }
    else
    {
        console.log("WARNING: Can't locate active merge button on page!");
    }
}

function doesPRContainFixupCommits()
{    
    return $('.timeline-commits:contains("fixup!")').length >= 1;
}