mirror of https://github.com/docker/cli.git
Clarify docs about ARG in FROM
Signed-off-by: Daniel Nephin <dnephin@docker.com>
This commit is contained in:
parent
0c8d401cd8
commit
2880030814
|
@ -530,8 +530,10 @@ FROM extras:${CODE_VERSION}
|
|||
CMD /code/run-extras
|
||||
```
|
||||
|
||||
To use the default value of an `ARG` declared before the first `FROM` use an
|
||||
`ARG` instruction without a value:
|
||||
An `ARG` declared before a `FROM` is outside of a build stage, so it
|
||||
can't be used in any instruction after a `FROM`. To use the default value of
|
||||
an `ARG` declared before the first `FROM` use an `ARG` instruction without
|
||||
a value inside of a build stage:
|
||||
|
||||
```Dockerfile
|
||||
ARG SETTINGS=default
|
||||
|
|
Loading…
Reference in New Issue