错误：无法解析composer.lock；它必须是由Composer生成的有效锁文件

Question

我正在尝试向Heroku部署一个简单的应用程序，但不断收到以下错误消息：

Alastairs-MacBook-Air:php-getting-started alastair$ git push heroku master
Counting objects: 6, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (6/6), 1.23 KiB | 0 bytes/s, done.
Total 6 (delta 5), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> PHP app detected
remote: -----> Bootstrapping...
remote: -----> Installing platform packages...
remote: 
remote:  !     ERROR: Couldn't parse 'composer.lock'; it must be a valid lock
remote:        file generated by Composer. Run 'composer update', add/commit
remote:        the change, then push again.
remote: 
remote:  !     Push rejected, failed to compile PHP app
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !   Push rejected to arcane-peak-94383.
remote: 
To https://git.heroku.com/arcane-peak-94383.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/arcane-peak-94383.git'

是这个教程。

我已多次运行composer更新，添加/提交更改，并重新安装了composer。都没有运气。作曲家。锁文件是由Composer生成的，正如我通过运行Composer update重新生成的一样。

这是我的作曲家。json文件：

{
 "require" : {
"silex/silex": "^1.3",
"monolog/monolog": "^1.4",
"twig/twig": "^1.8",
"symfony/twig-bridge": "^2",
"alrik11es/cowsayphp": "^1.0"
  },
  "require-dev": {
"heroku/heroku-buildpack-php": "*"
 }
}

我知道这是一个简单的解决方案，但我已经尝试解决了几个小时了。提前谢谢。

Answer 1

答案应该是这样的：

似乎Heroku只支持最新版本的Composer。

composer自我更新和进一步的composer更新（git add，git commit）应该可以解决这个问题。