IPA download fails to handle image file names with dot ».«

[fhaftmann]

The MR 2d513ad unfortunately introduces a breakdown: whenever an image file name contains a dot ».«, everything beyond this dot is considered as file name extension.

This may be valid for something like image.tar.gz, but breaks down as soon as the name itself contains a dot, e.g. due to a versioned image name like image-v0.1.2.tar.gz.

Possible solutions:

• Select suitable image file extension from a list of candidates.
• As soon as an image file extension is provided explicitly via environment, make no attempt to guess a file extension.

[dtantsur]

/triage accepted
/kind bug
/cc @Rozzii

Adam, PTAL. Maybe we actually should rewrite the whole thing in Python or Go?

[Rozzii]

I will go with option 2 for now and then we could rewrite it in something else but I am not keen on doing that.