Upgrade from swift mailer to symfony mailer

[tarasiadis]

I have try to install symfony mailer and unistall swift mailer.
As I can see to have a proper synfony mailer install, I have to remove mailsystem and swift mailer module, right? Can I use symfony mail with mailsystem and swift installed and enabled?
But I cannot uninstall swift mailer as I get

The following reason prevents Swift Mailer from being uninstalled:
Required by: commerce_base

I attach my composer.json here to help me how can I remove swift mailer and install symfony mailer

`{
"name": "drupalcommerce/project-base",
"description": "Commerce 2.x project template",
"type": "project",
"license": "GPL-2.0-or-later",
"authors": [
{
"name": "",
"role": ""
}
],
"repositories": {
"drupal": {
"type": "composer",
"url": "https://packages.drupal.org/8"
},
"commerce_base": {
"type": "vcs",
"url": "https://github.com/drupalcommerce/commerce_base"
},
"asset-packagist": {
"type": "composer",
"url": "https://asset-packagist.org"
},
"commerce-price-rule": {
"type": "vcs",
"url": "https://github.com/krystalcode/drupal8-commerce-price-rule"
}
},
"config": {
"bin-dir": "bin",
"sort-packages": true
},
"require": {
"php": ">=7.0.8",
"ext-curl": "",
"composer/installers": "^1.9",
"cweagans/composer-patches": "~1.0",
"drupal/address": "^1.8",
"drupal/admin_toolbar": "^3.0",
"drupal/adminimal_admin_toolbar": "^1.11",
"drupal/adminimal_theme": "^1.6",
"drupal/backup_migrate": "^5.0",
"drupal/better_exposed_filters": "^5.0@beta",
"drupal/betterlogin": "^1.5",
"drupal/bootstrap_barrio": "^5.1",
"drupal/bootstrap_basic_image_gallery": "^1.5",
"drupal/captcha": "^1.1",
"drupal/chosen": "^3.0",
"drupal/commerce": "^2.26",
"drupal/commerce_ajax_atc": "^1.0@alpha",
"drupal/commerce_bcc_address_token": "^1.1",
"drupal/commerce_cart_flyout": "^1.8",
"drupal/commerce_feeds": "^1.0@alpha",
"drupal/commerce_migrate": "^3.1@alpha",
"drupal/commerce_price_rule": "1.x-dev@dev",
"drupal/commerce_product_limits": "^1.0",
"drupal/composer_deploy": "^1.6",
"drupal/core-project-message": "^9",
"drupal/core-recommended": "^9.3",
"drupal/devel": "^4.0",
"drupal/draggableviews": "^2.0",
"drupal/easy_breadcrumb": "^2.0",
"drupal/eu_cookie_compliance": "^1.19",
"drupal/features": "^3.12",
"drupal/feeds": "^3.0@alpha",
"drupal/feeds_ex": "^1.0@alpha",
"drupal/feeds_tamper": "^2.0@beta",
"drupal/field_group": "^3.1",
"drupal/field_permissions": "^1.1",
"drupal/field_validation": "^1.0@beta",
"drupal/filefield_paths": "^1.0@beta",
"drupal/fontawesome": "^2.17",
"drupal/ga": "^1.8",
"drupal/gin": "^3.0",
"drupal/gin_login": "^1.0",
"drupal/gin_toolbar": "^1.0@beta",
"drupal/google_analytics": "^4.0",
"drupal/image_effects": "^3.0",
"drupal/image_url_formatter": "^1.0",
"drupal/jquery_ui_accordion": "^1.1",
"drupal/lang_dropdown": "^2.0@beta",
"drupal/languageicons": "^1.0@beta",
"drupal/login_emailusername": "^1.2",
"drupal/mailsystem": "^4.3",
"drupal/menu_breadcrumb": "^1.14",
"drupal/metatag": "^1.16",
"drupal/migrate_cron": "^1.2",
"drupal/migrate_plus": "^5.1",
"drupal/migrate_process_skip": "^2.0",
"drupal/migrate_run": "^2.0@beta",
"drupal/migrate_source_csv": "^3.4",
"drupal/migrate_tools": "^5.0",
"drupal/mimemail": "^1.0@alpha",
"drupal/module_filter": "^3.1",
"drupal/pathauto": "^1.8",
"drupal/pathologic": "^1.0@alpha",
"drupal/recaptcha": "^3.0",
"drupal/redirect": "^1.6",
"drupal/responsive_menu": "^4.4",
"drupal/responsive_views_grid": "^1.1",
"drupal/rules": "3.x-dev@dev",
"drupal/schema_metatag": "^2.1",
"drupal/search_api": "^1.19",
"drupal/seo_checklist": "^5.0",
"drupal/simple_instagram_feed": "^3.6",
"drupal/simple_popup_blocks": "^2.8",
"drupal/simple_sitemap": "^3.8",
"drupal/state_machine": "^1.5",
"drupal/swiftmailer": "^2.2",
"drupal/symfony_mailer": "^1.0@alpha",
"drupal/tb_megamenu": "^2.0@alpha",
"drupal/token": "^1.7",
"drupal/twig_debugger": "^1.1",
"drupal/twig_field_value": "^2.0",
"drupal/twig_tweak": "^2",
"drupal/unused_modules": "^1.2",
"drupal/vefl": "^3.0",
"drupal/views_bootstrap": "^4.3",
"drupal/views_bulk_edit": "^2.4",
"drupal/views_bulk_operations": "^4.0",
"drupal/views_data_export": "^1.0",
"drupal/weight": "^3.2",
"drupal/yoast_seo": "^1.7",
"drupalcommerce/commerce_base": "9.x-dev",
"drush/drush": "^10",
"laminas/laminas-diactoros": "^2.8.0",
"laminas/laminas-escaper": "^2.9",
"laminas/laminas-feed": "^2.12",
"laminas/laminas-stdlib": "^3.2",
"oomphinc/composer-installers-extender": "^2.0",
"raveren/kint": "^3.1",
"webflo/drupal-finder": "^1.0.0",
"webmozart/path-util": "^2.3"
},
"require-dev": {
"drupal/core-dev": "^9",
"kint-php/kint": "^3.3"
},
"conflict": {
"drupal/drupal": ""
},
"minimum-stability": "dev",
"prefer-stable": true,
"autoload": {
"classmap": [
"scripts/composer/ScriptHandler.php"
]
},
"scripts": {
"drupal-scaffold": "DrupalComposer\DrupalScaffold\Plugin::scaffold",
"pre-install-cmd": [
"DrupalProject\composer\ScriptHandler::checkComposerVersion"
],
"pre-update-cmd": [
"DrupalProject\composer\ScriptHandler::checkComposerVersion"
],
"post-install-cmd": [
"DrupalProject\composer\ScriptHandler::createRequiredFiles"
],
"post-update-cmd": [
"DrupalProject\composer\ScriptHandler::createRequiredFiles"
]
},
"extra": {
"composer-exit-on-patch-failure": true,
"patchLevel": {
"drupal/core": "-p2"
},
"drupal-scaffold": {
"locations": {
"web-root": "web/"
}
},
"installer-types": [
"bower-asset",
"npm-asset"
],
"installer-paths": {
"web/core": [
"type:drupal-core"
],
"web/libraries/{$name}": [
"type:drupal-library",
"type:bower-asset",
"type:npm-asset"
],
"web/modules/contrib/{$name}": [
"type:drupal-module"
],
"web/profiles/contrib/{$name}": [
"type:drupal-profile"
],
"web/themes/contrib/{$name}": [
"type:drupal-theme"
],
"drush/Commands/contrib/{$name}": [
"type:drupal-drush"
]
},
"patches": {
"drupal/address": {
"Address filed support for feeds": "https://www.drupal.org/files/issues/2019-04-19/address-feeds-address-target-2882589-23.patch"
},
"drupal/bootstrap_basic_image_gallery": {
"Template does not support Bootstrap v4": "https://www.drupal.org/files/issues/2020-11-04/template_doesnt_support_v4-3180586-8.patch"
},
"drupal/commerce": {
"Σωστός υπολογισμός ΦΠΑ στο σύνολο της παραγγελίας στο καλάθι": "https://www.drupal.org/files/issues/2020-06-01/allow-to-show-pretax-3143935-5.patch"
}
}
}

}`

[paolobareze]

This issue can be resolved by editing the commerce_base.info.yml file in the commerce_base profile folder and removing the line " - swiftmailer"

Cache rebuild and then go to uninstall again.

You should also remove "drupal/swiftmailer": "^2.0" from composer.json in the same folder to prevent further issues.