windows - 在dockerfile中多次切换转义字符

如果我在自己的dockerfile中有此文件，它将成功:



但是如果我将其嵌入另一个dockerfile中，它将失败:

FROM openjdk:8-nanoserver as openjdk

SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

# Remoting versions can be found in Remoting sub-project changelog
# https://github.com/jenkinsci/remoting/blob/master/CHANGELOG.md
ENV SLAVE_FILENAME=slave.jar \
    SLAVE_HASH_FILENAME=$SLAVE_FILENAME.sha1 \
    REMOTING_VERSION=3.23

# Get the jenkins slave jnlp agent jar from public location
RUN Invoke-WebRequest "https://repo.jenkins-ci.org/public/org/jenkins-ci/main/remoting/$env:REMOTING_VERSION/remoting-$env:REMOTING_VERSION.jar" -OutFile $env:SLAVE_FILENAME -UseBasicParsing; \
    Invoke-WebRequest "https://repo.jenkins-ci.org/public/org/jenkins-ci/main/remoting/$env:REMOTING_VERSION/remoting-$env:REMOTING_VERSION.jar.sha1" -OutFile $env:SLAVE_HASH_FILENAME -UseBasicParsing; \
    if ((Get-FileHash $env:SLAVE_FILENAME -Algorithm SHA1).Hash -ne $(Get-Content $env:SLAVE_HASH_FILENAME)) {exit 1};

# escape=`

# Use the latest Windows Server Core image with .NET Framework 4.7.1.
FROM microsoft/dotnet-framework:4.7.1

# Restore the default Windows shell for correct batch processing below.
SHELL ["cmd", "/S", "/C"]

# Download the Build Tools bootstrapper.
ADD https://aka.ms/vs/15/release/vs_buildtools.exe C:\TEMP\vs_buildtools.exe

# Install Build Tools excluding workloads and components with known issues.
RUN C:\TEMP\vs_buildtools.exe --quiet --wait --norestart --nocache `
    --installPath C:\BuildTools `
    --all `
    --remove Microsoft.VisualStudio.Component.Windows10SDK.10240 `
    --remove Microsoft.VisualStudio.Component.Windows10SDK.10586 `
    --remove Microsoft.VisualStudio.Component.Windows10SDK.14393 `
    --remove Microsoft.VisualStudio.Component.Windows81SDK `
 || IF "%ERRORLEVEL%"=="3010" EXIT 0

# escape=\
# do more stuff

我收到此错误:Error response from daemon: Dockerfile parse error line 33: unknown instruction: --INSTALLPATH

最佳答案

不支持。解析器指令(如用于更改转义字符的指令)仅在Dockerfile的顶部有效。您不能在第一条非解析器指令行之后更改解析器配置。其中包括FROM行，任何注释，甚至是空行。此外，每个指令只能设置一次。有关更多详细信息，请参见解析器指令的文档:https://docs.docker.com/engine/reference/builder/#parser-directives

关于windows - 在dockerfile中多次切换转义字符，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/51549297/