[Request]: Support inline Dockerfile from stdin for container build

[skaegi]

Feature or enhancement request details

In some very common automation cases it would be great to support inlined Dockerfiles for container build.
For example:

$ echo -e "FROM alpine\nRUN echo 'Hello World'" | container build -t myimage -f - .
Error: Dockerfile does not exist at path: -
Usage: container build [<options>] [<context-dir>]
  See 'container build --help' for more information.

Code of Conduct

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[saehejkang]

Thinking of tackling this after #559 and #734 are completed and closed. Seems we can take a similar route for this by creating a temporary Dockerfile, saving the data from stdin, using the temp file for the build command, and then deleting it after use.

[saehejkang]

@realrajaryan I just committed changes to close this issue 🐎

[realrajaryan]

@realrajaryan I just committed changes to close this issue 🐎

Thanks! I'll take a look