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34 lines
666 B
Go
34 lines
666 B
Go
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# SHELL 指令
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格式：`SHELL ["executable", "parameters"]`
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`SHELL` 指令可以指定 `RUN` `ENTRYPOINT` `CMD` 指令的 shell，Linux 中默认为 `["/bin/sh", "-c"]`
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```docker
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SHELL ["/bin/sh", "-c"]
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RUN lll ; ls
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SHELL ["/bin/sh", "-cex"]
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RUN lll ; ls
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```
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两个 `RUN` 运行同一命令，第二个 `RUN` 运行的命令会打印出每条命令并当遇到错误时退出。
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当 `ENTRYPOINT` `CMD` 以 shell 格式指定时，`SHELL` 指令所指定的 shell 也会成为这两个指令的 shell
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```docker
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SHELL ["/bin/sh", "-cex"]
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# /bin/sh -cex "nginx"
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ENTRYPOINT nginx
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```
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```docker
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SHELL ["/bin/sh", "-cex"]
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# /bin/sh -cex "nginx"
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CMD nginx
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```
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