Your requirements could not be resolved to an installable set of packages.

[jay763190097]

jay@jay-PC:~/php/some-dir$ composer require "drupal/devel:1.x-dev"
./composer.json has been updated

DrupalProject\composer\ScriptHandler::checkComposerVersion
Loading composer repositories with package information Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Installation request for drupal/devel 1.x-dev -> satisfiable by drupal/devel[1.x-dev].
- Conclusion: remove symfony/var-dumper v4.4.1
- Conclusion: don't install symfony/var-dumper v4.4.1
- drupal/devel 1.x-dev requires symfony/var-dumper ~2.7|^3 -> satisfiable by symfony/var-dumper[3.4.x-dev, v3.4.1, v3.4.10, v3.4.11, v3.4.12, v3.4.13, v3.4.14, v3.4.15, v3.4.16, v3.4.17, v3.4.18, v3.4.19, v3.4.2, v3.4.20, v3.4.21, v3.4.22, v3.4.23, v3.4.24, v3.4.25, v3.4.26, v3.4.27, v3.4.28, v3.4.29, v3.4.3, v3.4.30, v3.4.31, v3.4.32, v3.4.33, v3.4.34, v3.4.35, v3.4.36, v3.4.4, v3.4.5, v3.4.6, v3.4.7, v3.4.8, v3.4.9].
- Can only install one of: symfony/var-dumper[3.4.x-dev, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.1, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.10, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.11, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.12, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.13, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.14, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.15, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.16, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.17, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.18, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.19, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.2, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.20, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.21, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.22, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.23, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.24, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.25, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.26, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.27, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.28, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.29, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.3, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.30, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.31, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.32, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.33, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.34, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.35, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.36, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.4, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.5, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.6, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.7, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.8, v4.4.1].
- Can only install one of: symfony/var-dumper[v3.4.9, v4.4.1].
- Installation request for symfony/var-dumper (locked at v4.4.1) -> satisfiable by symfony/var-dumper[v4.4.1].

Installation failed, reverting ./composer.json to its original content.

[solody]

it could be resolved now.

[jay763190097]

怎么开发和调试，能写个文档么？

[ugintl]

@solody I just have to run this command to download weeshop? composer create-project weeshop/weeshop-project WeeShop --stability dev --no-interaction -vvv

After it finishes, I can just install it like normal drupal. correct?

[solody]

What problem is that?
It may work.