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Convert Unused ARG error to warning

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Signed-off-by: Addam Hardy <addam.hardy@gmail.com>
Upstream-commit: f150f42009dddb4f9b8d4ceef8763af701b0d0f9
Component: engine
This commit is contained in:
Addam Hardy
2016-10-15 22:37:15 -05:00
parent 80b8147332
commit bedb3b19ee
4 changed files with 27 additions and 24 deletions
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8
components/engine/docs/reference/builder.md
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@ -1286,12 +1286,12 @@ to create the directory in the Dockerfile. For example:
ARG <name>[=<default value>]
The `ARG` instruction defines a variable that users can pass at build-time to
the builder with the `docker build` command using the
`--build-arg <varname>=<value>` flag. If a user specifies a build argument
that was not defined in the Dockerfile, the build outputs an error.
the builder with the `docker build` command using the `--build-arg
<varname>=<value>` flag. If a user specifies a build argument that was not
defined in the Dockerfile, the build outputs a warning.
```
One or more build-args were not consumed, failing build.
[Warning] One or more build-args [foo] were not consumed.
```
The Dockerfile author can define a single variable by specifying `ARG` once or many