environment variables of current shell can't be passed to container via nerdctl run '-e' option

[sixwaaaay]

Description

behaivors as follow will print 10

export X=10
docker run -e X alpine printenv X

however, nothing will be printed when I use nerdctl

export X=10
nerdctl run -e X alpine printenv X

Steps to reproduce the issue

1. set env var export X=10
2. run a container with the env var and print it in container nerdctl run -e X alpine printenv X

Describe the results you received and expected

result: nothing
expected: print 10

What version of nerdctl are you using?

nerdctl version:

Client:
Version: v1.0.0
OS/Arch: linux/amd64
Git commit: c00780a
buildctl:
Version: v0.10.5
GitCommit: bc26045116045516ff2427201abd299043eaf8f7

Server:
containerd:
Version: v1.6.9
GitCommit: 1c90a442489720eec95342e1789ee8a5e1b9536f
runc:
Version: 1.1.4
GitCommit: v1.1.4-0-g5fd4c4d1

Are you using a variant of nerdctl? (e.g., Rancher Desktop)

No response

Host information

OS information:

PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

[djdongjin]

I tired this and noticed this might because the different behavior between docker and containerd:

Docker said an env without value (e.g., -e X vs -e X=10) means obtaining the value from shell: docker

Containerd said that means unsetting the value: nerdctl, containerd.

Though I'm not sure if this is expected containerd behavior defined in oci. cc: @AkihiroSuda

[djdongjin]

@sixwaaaay btw, I think you can work around this by nerdctl run -e X=$X alpine printenv X

[sixwaaaay]

This command does not seem to work for passing environment variables with multi-line text
My attempt is to use base64 encoding to convert multi-line text into a base64 text without line breaks every 76 characters, then pass it to the container and decode it in the container.

export X=`cat file | base64 -w 0` # export X=`printenv X | base64 -w 0`
nerdctl run -e X=$X alpine printenv X | base64 -d

I think it seems a little troubling

[liubin]

@sixwaaaay Do you want this?

root# export X="aaa
> bbb"

root# echo "$X"
aaa
bbb

root# _output/nerdctl run --rm --env X alpine printenv X
aaa
bbb