Sebastiaan van Stijn ff0a0e364b Builder: fix "COPY --from" to non-existing directory on Windows ...

This fixes a regression introduced in 6d87f19142,
causing `COPY --from` to fail if the target directory does not exist:

```
FROM mcr.microsoft.com/windows/servercore:ltsc2019 as s1
RUN echo "Hello World" > /hello

FROM mcr.microsoft.com/windows/servercore:ltsc2019
COPY --from=s1 /hello /hello/another/world
```

Would produce an error:

```
Step 4/4 : COPY --from=s1 /hello /hello/another/world
failed to copy files: mkdir \\?: The filename, directory name, or volume label syntax is incorrect.
```

The cause for this was that Go's `os.MkdirAll()` does not support/detect volume GUID paths
(`\\?\Volume{dae8d3ac-b9a1-11e9-88eb-e8554b2ba1db}\hello\another}`), and as a result
attempted to create the volume as a directory (`\\?`), causing it to fail.

This patch replaces `os.MkdirAll()` with our own `system.MkdirAll()` function, which
is capable of detecting GUID volumes.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 5858a99267)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

2019-08-08 17:05:11 +02:00

..

Dockerfile.TestBuildMultiStageCopy

Builder: fix "COPY --from" to non-existing directory on Windows

2019-08-08 17:05:11 +02:00

Dockerfile.testBuildPreserveOwnership

builder: fix COPY --from should preserve ownership

2019-03-13 00:55:04 +01:00