Convert Unused ARG error to warning
Signed-off-by: Addam Hardy <addam.hardy@gmail.com>
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@ -1286,12 +1286,12 @@ to create the directory in the Dockerfile. For example:
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ARG <name>[=<default value>]
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The `ARG` instruction defines a variable that users can pass at build-time to
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the builder with the `docker build` command using the
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`--build-arg <varname>=<value>` flag. If a user specifies a build argument
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that was not defined in the Dockerfile, the build outputs an error.
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the builder with the `docker build` command using the `--build-arg
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<varname>=<value>` flag. If a user specifies a build argument that was not
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defined in the Dockerfile, the build outputs a warning.
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```
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One or more build-args were not consumed, failing build.
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[Warning] One or more build-args [foo] were not consumed.
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```
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The Dockerfile author can define a single variable by specifying `ARG` once or many
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@ -26,7 +26,7 @@ For example:
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# DESCRIPTION
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A Dockerfile is a file that automates the steps of creating a Docker image.
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A Dockerfile is a file that automates the steps of creating a Docker image.
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A Dockerfile is similar to a Makefile.
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# USAGE
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@ -71,10 +71,10 @@ A Dockerfile is similar to a Makefile.
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multiple images. Make a note of the last image ID output by the commit before
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each new **FROM** command.
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-- If no tag is given to the **FROM** instruction, Docker applies the
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-- If no tag is given to the **FROM** instruction, Docker applies the
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`latest` tag. If the used tag does not exist, an error is returned.
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-- If no digest is given to the **FROM** instruction, Docker applies the
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-- If no digest is given to the **FROM** instruction, Docker applies the
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`latest` tag. If the used tag does not exist, an error is returned.
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**MAINTAINER**
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@ -148,7 +148,7 @@ A Dockerfile is similar to a Makefile.
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```
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-- To make the container run the same executable every time, use **ENTRYPOINT** in
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combination with **CMD**.
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combination with **CMD**.
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If the user specifies arguments to `docker run`, the specified commands
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override the default in **CMD**.
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Do not confuse **RUN** with **CMD**. **RUN** runs a command and commits the result.
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@ -156,7 +156,7 @@ A Dockerfile is similar to a Makefile.
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the image.
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**LABEL**
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-- `LABEL <key>=<value> [<key>=<value> ...]`or
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-- `LABEL <key>=<value> [<key>=<value> ...]`or
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```
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LABEL <key>[ <value>]
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LABEL <key>[ <value>]
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@ -176,8 +176,8 @@ A Dockerfile is similar to a Makefile.
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```
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An image can have more than one label. To specify multiple labels, separate
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each key-value pair by a space.
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each key-value pair by a space.
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Labels are additive including `LABEL`s in `FROM` images. As the system
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encounters and then applies a new label, new `key`s override any previous
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labels with identical keys.
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@ -194,7 +194,7 @@ A Dockerfile is similar to a Makefile.
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**ENV**
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-- `ENV <key> <value>`
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The **ENV** instruction sets the environment variable <key> to
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the value `<value>`. This value is passed to all future
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the value `<value>`. This value is passed to all future
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**RUN**, **ENTRYPOINT**, and **CMD** instructions. This is
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functionally equivalent to prefixing the command with `<key>=<value>`. The
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environment variables that are set with **ENV** persist when a container is run
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@ -243,7 +243,7 @@ A Dockerfile is similar to a Makefile.
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being built (the context of the build) or a remote file URL. The `<dest>` is an
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absolute path, or a path relative to **WORKDIR**, into which the source will
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be copied inside the target container. If you **COPY** an archive file it will
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land in the container exactly as it appears in the build context without any
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land in the container exactly as it appears in the build context without any
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attempt to unpack it. All new files and directories are created with mode **0755**
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and with the uid and gid of **0**.
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@ -326,10 +326,10 @@ A Dockerfile is similar to a Makefile.
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The `ARG` instruction defines a variable that users can pass at build-time to
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the builder with the `docker build` command using the `--build-arg
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<varname>=<value>` flag. If a user specifies a build argument that was not
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defined in the Dockerfile, the build outputs an error.
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defined in the Dockerfile, the build outputs a warning.
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```
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One or more build-args were not consumed, failing build.
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[Warning] One or more build-args [foo] were not consumed
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```
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The Dockerfile author can define a single variable by specifying `ARG` once or many
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@ -454,7 +454,7 @@ A Dockerfile is similar to a Makefile.
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you are defining an image to use as a base for building other images. For
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example, if you are defining an application build environment or a daemon that
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is customized with a user-specific configuration.
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Consider an image intended as a reusable python application builder. It must
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add application source code to a particular directory, and might need a build
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script called after that. You can't just call **ADD** and **RUN** now, because
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@ -470,4 +470,5 @@ A Dockerfile is similar to a Makefile.
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# HISTORY
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*May 2014, Compiled by Zac Dover (zdover at redhat dot com) based on docker.com Dockerfile documentation.
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*Feb 2015, updated by Brian Goff (cpuguy83@gmail.com) for readability
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*Sept 2015, updated by Sally O'Malley (somalley@redhat.com)
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*Sept 2015, updated by Sally O'Malley (somalley@redhat.com)
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*Oct 2016, updated by Addam Hardy (addam.hardy@gmail.com)
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