earthly: Windows native path wrongly prepended with Unix root /

I’m using Earthly version v0.6.14 831d37ee160252d612e6c8cbaf8681e8062f8227 windows/amd64; Windows 10 and I’ve got this error:

ongoing | internal (25 seconds ago)
            internal | --> 271c67a1-94d9-4241-8bca-cbae334622ae /bin/sh -c cat 'C:\Users\GIANLU~1.MAS\AppData\Local\Temp\earthly-docker-load3121115275/image.tar' | docker load
            internal | WARN: (271c67a1-94d9-4241-8bca-cbae334622ae /bin/sh -c cat 'C:\Users\GIANLU~1.MAS\AppData\Local\Temp\earthly-docker-load3121115275/image.tar' | docker load) error calling LocalhostExec: rpc error: code = Unknown desc = mkdir /C:: The filename, directory name, or volume label syntax is incorrect.
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Error: build target: build main: failed to solve: mkdir /C:: The filename, directory name, or volume label syntax is incorrect.

It’s marked as internal and I’m not sure where to look for a fix, but in the past a similar issue was due to the fact the code was manipulating the path assuming that an absolute path always start with / that is false in case of Windows OS.

About this issue

Original URL
State: open
Created 2 years ago
Reactions: 1
Comments: 16 (11 by maintainers)

Most upvoted comments

@MicheleBuselli I strongly recommend to avoid having your build system depends and requires stuff outside the context of your sources. In your case, you are trying to achieve something that in general Docker doesn’t really like. So, I would suggest to analyse why that approach is necessary and think a way to refactor the build process to avoid that.

In the meantime, a workaround to keep going is to use an Earthfile rule like the following:

package-helm:
    FROM alpine/helm:3.8.0
    COPY . /
    IF --no-cache [ -f /.docker/config.json ]
        COPY .docker/config.json /root/.docker/config.json
        RUN do your stuff, now you have /root/.docker/config.json
    ELSE
        RUN echo "Docker config.json is required for this target;"
        RUN echo "Please create one in .docker/config.json or copy it from your $HOME"
    END

This achieve:

By pass LOCALLY bug
All build process will happen inside a docker container
Users will be prevented from running the build without setting the config.json and get an error message
Give time to you to figure it out a better alternative

Of course the drawback is that config.json can get off-sync with the one in $HOME, but if you rarely change it, it may not be a big drawback.

GMaxera on Oct 3, 2022

I’ve found an even shorter example that reproduce the issue:

test-locally-run:
    LOCALLY
    RUN echo "Hi, Earthly"

 +test-locally-run *local* | --> RUN echo "Hi, Earthly"
   +test-locally-run *local* | WARN: (RUN echo "Hi, Earthly") error calling LocalhostExec: rpc error: code = Unknown desc = mkdir /C:: The filename, directory name, or volume label syntax is incorrect.
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Error: build target: build main: failed to solve: mkdir /C:: The filename, directory name, or volume label syntax is incorrect.

GMaxera on May 4, 2022