Laravel6の環境で、vue.jsを使おうと思い下記のコマンドを実行しました。
composer require laravel/ui
すると次のようなエラーが表示されました。
Warning from https://packagist.jp: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
1/3: https://packagist.jp/p/provider-2020-01$3b47bdc7f4552453c3fd4b4ed58f5e42404f319fc673141205cb6e6271dca6ed.json
2/3: https://packagist.jp/p/provider-latest$412f56eca467df41506d7503ca52b6fb1445deab6e7d498c968ef8f623e80ded.json
3/3: https://packagist.jp/p/provider-2020-04$9e44d01bf60344d30ce67e5250da901f2aec44b28a509601cc3b21177fdc7b40.json
Finished: success: 3, skipped: 0, failure: 0, total: 3
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Warning from https://packagist.jp: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
Using version ^2.4 for laravel/ui
./composer.json has been updated
Warning from https://packagist.jp: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
Loading composer repositories with package information
Warning from https://packagist.jp: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Conclusion: remove laravel/framework v6.2.0
- Conclusion: don't install laravel/framework v6.2.0
- laravel/ui 2.x-dev requires illuminate/filesystem ^7.0 -> satisfiable by illuminate/filesystem[7.x-dev, v7.0.0, v7.0.1, v7.0.2, v7.0.3, v7.0.4, v7.0.5, v7.0.6, v7.0.7, v7.0.8, v7.1.0, v7.1.1, v7.1.2, v7.1.3, v7.10.0, v7.10.1, v7.10.2, v7.10.3, v7.11.0, v7.12.0, v7.13.0, v7.14.0, v7.14.1, v7.15.0, v7.16.0, v7.16.1, v7.17.0, v7.17.1, v7.17.2, v7.18.0, v7.19.0, v7.19.1, v7.2.0, v7.2.1, v7.2.2, v7.20.0, v7.21.0, v7.22.0, v7.22.1, v7.22.2, v7.22.3, v7.22.4, v7.23.0, v7.23.1, v7.23.2, v7.24.0, v7.25.0, v7.26.0, v7.26.1, v7.27.0, v7.28.0, v7.28.1, v7.28.2, v7.28.3, v7.28.4, v7.29.0, v7.29.1, v7.29.2, v7.3.0, v7.4.0, v7.5.0, v7.5.1, v7.5.2, v7.6.0, v7.6.1, v7.6.2, v7.7.0, v7.7.1, v7.8.0, v7.8.1, v7.9.0, v7.9.1, v7.9.2].
- laravel/ui v2.4.0 requires illuminate/filesystem ^7.0 -> satisfiable by illuminate/filesystem[7.x-dev, v7.0.0, v7.0.1, v7.0.2, v7.0.3, v7.0.4, v7.0.5, v7.0.6, v7.0.7, v7.0.8, v7.1.0, v7.1.1, v7.1.2, v7.1.3, v7.10.0, v7.10.1, v7.10.2, v7.10.3, v7.11.0, v7.12.0, v7.13.0, v7.14.0, v7.14.1, v7.15.0, v7.16.0, v7.16.1, v7.17.0, v7.17.1, v7.17.2, v7.18.0, v7.19.0, v7.19.1, v7.2.0, v7.2.1, v7.2.2, v7.20.0, v7.21.0, v7.22.0, v7.22.1, v7.22.2, v7.22.3, v7.22.4, v7.23.0, v7.23.1, v7.23.2, v7.24.0, v7.25.0, v7.26.0, v7.26.1, v7.27.0, v7.28.0, v7.28.1, v7.28.2, v7.28.3, v7.28.4, v7.29.0, v7.29.1, v7.29.2, v7.3.0, v7.4.0, v7.5.0, v7.5.1, v7.5.2, v7.6.0, v7.6.1, v7.6.2, v7.7.0, v7.7.1, v7.8.0, v7.8.1, v7.9.0, v7.9.1, v7.9.2].
- laravel/ui v2.4.1 requires illuminate/filesystem ^7.0 -> satisfiable by illuminate/filesystem[7.x-dev, v7.0.0, v7.0.1, v7.0.2, v7.0.3, v7.0.4, v7.0.5, v7.0.6, v7.0.7, v7.0.8, v7.1.0, v7.1.1, v7.1.2, v7.1.3, v7.10.0, v7.10.1, v7.10.2, v7.10.3, v7.11.0, v7.12.0, v7.13.0, v7.14.0, v7.14.1, v7.15.0, v7.16.0, v7.16.1, v7.17.0, v7.17.1, v7.17.2, v7.18.0, v7.19.0, v7.19.1, v7.2.0, v7.2.1, v7.2.2, v7.20.0, v7.21.0, v7.22.0, v7.22.1, v7.22.2, v7.22.3, v7.22.4, v7.23.0, v7.23.1, v7.23.2, v7.24.0, v7.25.0, v7.26.0, v7.26.1, v7.27.0, v7.28.0, v7.28.1, v7.28.2, v7.28.3, v7.28.4, v7.29.0, v7.29.1, v7.29.2, v7.3.0, v7.4.0, v7.5.0, v7.5.1, v7.5.2, v7.6.0, v7.6.1, v7.6.2, v7.7.0, v7.7.1, v7.8.0, v7.8.1, v7.9.0, v7.9.1, v7.9.2].
- don't install illuminate/filesystem 7.x-dev|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.3|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.4|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.5|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.6|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.7|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.0.8|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.1.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.1.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.1.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.1.3|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.10.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.10.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.10.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.10.3|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.11.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.12.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.13.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.14.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.14.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.15.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.16.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.16.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.17.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.17.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.17.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.18.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.19.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.19.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.2.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.2.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.2.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.20.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.21.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.22.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.22.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.22.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.22.3|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.22.4|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.23.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.23.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.23.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.24.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.25.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.26.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.26.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.27.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.28.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.28.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.28.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.28.3|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.28.4|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.29.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.29.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.29.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.3.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.4.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.5.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.5.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.5.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.6.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.6.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.6.2|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.7.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.7.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.8.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.8.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.9.0|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.9.1|don't install laravel/framework v6.2.0
- don't install illuminate/filesystem v7.9.2|don't install laravel/framework v6.2.0
- Installation request for laravel/framework 6.2.0 -> satisfiable by laravel/framework[v6.2.0].
- Installation request for laravel/ui ^2.4 -> satisfiable by laravel/ui[2.x-dev, v2.4.0, v2.4.1].
Installation failed, reverting ./composer.json to its original content.
ドキュメントを見てみたところ次のようにバージョンを指定すると解決しました。
composer require laravel/ui:^1.0 --dev
Laravel7以降はバージョン指定なしでも大丈夫なようです。
