由于依赖关系问题，Heroku没有部署构建

Question

在heroku中部署构建时，它会导致依赖错误，是否有人面临过同样的问题？根本原因是什么？有办法解决这个问题吗？heroku构建以前曾经工作过，但是现在这个错误发生了，它真的让人困惑。

remote: -----> Installing dependencies
    remote:        Installing node modules
    remote:        npm ERR! code ERESOLVE
    remote:        npm ERR! ERESOLVE could not resolve
    remote:        npm ERR! 
    remote:        npm ERR! While resolving: next@12.1.6
    remote:        npm ERR! Found: react@16.14.0
    remote:        npm ERR! node_modules/react
    remote:        npm ERR!   react@"^16.10.1" from the root project
    remote:        npm ERR!   peer react@"^16.8.0" from @apollo/react-common@3.1.4
    remote:        npm ERR!   node_modules/@apollo/react-common
    remote:        npm ERR!     @apollo/react-common@"^3.1.4" from @apollo/react-components@3.1.5
    remote:        npm ERR!     node_modules/@apollo/react-components
    remote:        npm ERR!       @apollo/react-components@"^3.1.5" from @apollo/react-hoc@3.1.5
    remote:        npm ERR!       node_modules/@apollo/react-hoc
    remote:        npm ERR!         @apollo/react-hoc@"^3.1.5" from react-apollo@3.1.5
    remote:        npm ERR!         node_modules/react-apollo
    remote:        npm ERR!       1 more (react-apollo)
    remote:        npm ERR!     @apollo/react-common@"^3.1.4" from @apollo/react-hoc@3.1.5
    remote:        npm ERR!     node_modules/@apollo/react-hoc
    remote:        npm ERR!       @apollo/react-hoc@"^3.1.5" from react-apollo@3.1.5
    remote:        npm ERR!       node_modules/react-apollo
    remote:        npm ERR!         react-apollo@"^3.1.3" from the root project
    remote:        npm ERR!     3 more (@apollo/react-hooks, @apollo/react-ssr, react-apollo)
    remote:        npm ERR!   14 more (@apollo/react-components, @apollo/react-hoc, ...)
    remote:        npm ERR! 
    remote:        npm ERR! Could not resolve dependency:
    remote:        npm ERR! peer react@"^17.0.2 || ^18.0.0-0" from next@12.1.6
    remote:        npm ERR! node_modules/next
    remote:        npm ERR!   next@"^12.1.6" from the root project
    remote:        npm ERR!   peer next@">= 5.1.0" from next-env@1.1.1
    remote:        npm ERR!   node_modules/next-env
    remote:        npm ERR!     next-env@"^1.1.0" from the root project
    remote:        npm ERR! 
    remote:        npm ERR! Conflicting peer dependency: react@18.1.0
    remote:        npm ERR! node_modules/react
    remote:        npm ERR!   peer react@"^17.0.2 || ^18.0.0-0" from next@12.1.6
    remote:        npm ERR!   node_modules/next
    remote:        npm ERR!     next@"^12.1.6" from the root project
    remote:        npm ERR!     peer next@">= 5.1.0" from next-env@1.1.1
    remote:        npm ERR!     node_modules/next-env
    remote:        npm ERR!       next-env@"^1.1.0" from the root project
    remote:        npm ERR! 
    remote:        npm ERR! Fix the upstream dependency conflict, or retry
    remote:        npm ERR! this command with --force, or --legacy-peer-deps
    remote:        npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
    remote:        npm ERR! 
    remote:        npm ERR! See /tmp/npmcache.KnKS4/eresolve-report.txt for a full report.
    remote:        
    remote:        npm ERR! A complete log of this run can be found in:
    remote:        npm ERR!     /tmp/npmcache.KnKS4/_logs/2022-06-03T12_47_36_545Z-debug-0.log
    remote: 
    remote: -----> Build failed

Answer 1

几天前(6月初)，我在Heroku上部署了我的React应用程序，我也遇到了同样的问题。问题似乎是由国家预防机制版本更新引起的。默认情况下，Heroku使用节点和npm的最新稳定版本作为构建引擎，但如果使用以前的版本，则可能会导致相互冲突的依赖关系。

因此，如果在本地完全正常，但是在Heroku上部署它时会发生此问题，下面是解决方案：

使用node --version和npm --version签出本地实例上的版本，然后将它们添加到package.json文件中的engines部分中，如下所示(用所拥有的版本替换16.0.0和7.10.0 )：

"engines": {
    "node": "16.0.0",
    "npm": "7.10.0"
},

然后将应用程序重新部署到Heroku上。问题应该解决。

Answer 2

将NPM_CONFIG_LEGACY_PEER_DEPS环境变量添加到Heroku应用程序中，并将其值设置为true。

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