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Merge pull request #25775 from ddgenome/entrypoint-env

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Remove erroneous ENTRYPOINT note
Upstream-commit: c1bdda0be8616f987245cb61a4aedc09c8b5c806
Component: engine
This commit is contained in:
Vincent Demeester
2016-08-22 09:13:54 +02:00
committed by GitHub
parent c7c596011e 1625a6329f
commit 536db7fdc5
1 changed files with 9 additions and 2 deletions
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11
components/engine/docs/reference/builder.md
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@ -541,6 +541,9 @@ RUN /bin/bash -c 'source $HOME/.bashrc ; echo $HOME'
> `RUN [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.
> If you want shell processing then either use the *shell* form or execute
> a shell directly, for example: `RUN [ "sh", "-c", "echo $HOME" ]`.
> When using the exec form and executing a shell directly, as in the case for
> the shell form, it is the shell that is doing the environment variable
> expansion, not docker.
>
> **Note**:
> In the *JSON* form, it is necessary to escape backslashes. This is
@ -607,6 +610,9 @@ instruction as well.
> `CMD [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.
> If you want shell processing then either use the *shell* form or execute
> a shell directly, for example: `CMD [ "sh", "-c", "echo $HOME" ]`.
> When using the exec form and executing a shell directly, as in the case for
> the shell form, it is the shell that is doing the environment variable
> expansion, not docker.
When used in the shell or exec formats, the `CMD` instruction sets the command
to be executed when running the image.
@ -1075,8 +1081,9 @@ sys 0m 0.03s
> `ENTRYPOINT [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.
> If you want shell processing then either use the *shell* form or execute
> a shell directly, for example: `ENTRYPOINT [ "sh", "-c", "echo $HOME" ]`.
> Variables that are defined in the `Dockerfile`using `ENV`, will be substituted by
> the `Dockerfile` parser.
> When using the exec form and executing a shell directly, as in the case for
> the shell form, it is the shell that is doing the environment variable
> expansion, not docker.
### Shell form ENTRYPOINT example