命令运行良好..。但是给我一个错误，当“管道”到grep，在码头运行？

Question

抱歉，我真的不能解释得更好了。我在学习shell编程。

我试图检测作曲家是否有一个名为“post”的脚本。要做到这一点，人们可以调用composer run-script --list (文档)。因此，我在条件内将该命令传输到grep -q。

当我在Docker层(发行版基于Debian)中运行这个程序时，只有在条件内调用composer run-script --list时才会得到一个错误：

RUN set -eux; \
    if [ -f composer.json ]; then \
        composer dump-autoload --no-dev --classmap-authoritative; \
        # This is working fine, a list is returned (see log)
        composer run-script --list; \
        # This gives me an error (Unable to write output)
        if composer run-script --list | grep -q post-install-cmd; then \
            echo "Script was found!"; \
        fi; \
    fi

日志：

#41 [myproject php_prod  9/10] RUN set -eux;     if [ -f composer.json ]; then         composer dump-autoload --no-dev --classmap-authoritative;         composer run-script --list;         if composer run-script --list | grep -q post-install-cmd; then             echo "Script was found!";         fi;     fi
#41 0.441 + [ -f composer.json ]
#41 0.445 + composer dump-autoload --no-dev --classmap-authoritative
#41 0.835 Generating optimized autoload files (authoritative)
#41 0.878 Generated optimized autoload files (authoritative) containing 40 classes
#41 0.892 + composer run-script --list
#41 1.164 scripts:
#41 1.168   auto-scripts      Runs the auto-scripts script as defined in composer.json.  
#41 1.169   post-install-cmd                                                             
#41 1.169   post-update-cmd                                                              
#41 1.183 + grep -q post-install-cmd
#41 1.188 + composer run-script --list
#41 1.468 scripts:
#41 1.471 
#41 1.479                                                           
#41 1.480   [Symfony\Component\Console\Exception\RuntimeException]  
#41 1.481   Unable to write output.                                 
#41 1.481                                                           
#41 1.481 
#41 1.482 run-script [--timeout TIMEOUT] [--dev] [--no-dev] [-l|--list] [--] [<script>] [<args>]...
#41 1.482 
#41 1.495 + echo Script was found!
#41 1.497 Script was found!
#41 DONE 1.6s

Answer 1

通过将--no-ansi选项添加到composer运行脚本--list命令中，可以尝试禁用ANSI转义代码用于输出格式设置。这可以偶尔修复终端环境中不支持它们的输出相关问题。

RUN set -eux; \
    if [ -f composer.json ]; then \
        composer dump-autoload --no-dev --classmap-authoritative; \
        composer run-script --list; \
        if composer run-script --list --no-ansi | grep -q post-install-cmd; then \
            echo "Script was found!"; \
        fi; \
    fi

或者另一种选择：

docker run -t my_image