"extra": {
    "magento-force": true,
    "composer-exit-on-patch-failure": true,
    "patches": {
        "vendorname/module-somerandomname": {
            "Description here": "patches/my_patch_name.patch"
        }
    }
},

- First make sure that this package is installed via composer: cweagans/composer-patches - Lets say you want to apply a patch from a third-party module installed via composer for a controller. Please make sure that you have this part in the composer.json file: ``` "extra": { "magento-force": true, "composer-exit-on-patch-failure": true, "patches": { "vendorname/module-somerandomname": { "Description here": "patches/my_patch_name.patch" } } }, ``` - Assuming that your vendor folder is in the .gitignore file, you can still do: 1. git add -f vendor/vendorname/module-somerandomname/Controller/Myfile.php 2. Do your changes to the Myfile.php 3. Do a git diff vendor/vendorname/module-somerandomname/Controller/Myfile.php > patches/my_patch_name.patch 4. git reset HEAD vendor/vendorname/module-somerandomname/Controller/Myfile.php 5. Do a composer install