ADD Dockerfile command does not unpack tarballs

[andrewshadura]

Describe the bug
ADD tarball.tar.gz / is supposed to unpack the said tarball into the root. Instead, it just copies it into it.

To Reproduce
The specific Dockerfile I ran into this at:

FROM scratch
    
ENV LANG=C.UTF-8
ENV LC_ALL=C.UTF-8

ARG DEBIAN_FRONTEND=noninteractive
  
ARG OSPACK=debian.tar.gz
ADD ${OSPACK} /

RUN apt-get update

Here, debian.tar.gz is a minimal Debian rootfs tarball.

Expected behavior
The tarball is unpacked, so that I can run commands using its contents.

Instead, I’m getting:

info	* Step 6/7 (modifyfs) : ADD debian.tar.gz /  (465a0d0c)
info	* Execute ADD debian.tar.gz /  (465a0d0c) took 91.261753ms
info	* Not committing step ADD debian.tar.gz /  (465a0d0c)
info	* Step 6/7 (modifyfs) : RUN apt-get update  (d6692f4c)
error	failed to execute build plan: execute stage: build stage 0: build node: do execute: execute step: cmd start: exec: "sh": executable file not found in $PATH

[andrewshadura]

Thanks, but it seems that PR only adds support for tar.gz but not plain tar archives or tar.bz2/tar.xz or tars compressed with other compressors.

…

-- Cheers, Andrej

On Wed, 11 Mar 2020, 22:01 Yiran Wang, ***@***.***> wrote: Closed #298 <#298> via #309 <#309>. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#298 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACLQBM64OMTN3BKP6LNHSDRG73Z3ANCNFSM4KGQU4AQ> .

[yiranwang52]

Let me keep the issue open until they are all supported