Cannot match release with uname -m with Arm based Docker image

[back-2-95]

Expected Behavior

Matching Envplate release with uname -m does not work in Dockerfile for M1 (arm), please see:

curl -LJ --silent https://github.com/kreuzwerker/envplate/releases/download/v1.0.3/envplate_1.0.3_Linux_$(uname -m).tar.gz -o envplate_aarch64.tar.gz

I use this to go around:

#
# Envplate
#
FROM alpine AS envplate-builder

ARG REPO=https://github.com/kreuzwerker/envplate/releases/download
ARG VERSION=1.0.3

WORKDIR /tmp
RUN apk add curl

RUN <<EOF
curl -LJ --silent ${REPO}/v${VERSION}/envplate_${VERSION}_Linux_arm64.tar.gz -o envplate_aarch64.tar.gz
curl -LJ --silent ${REPO}/v${VERSION}/envplate_${VERSION}_Linux_x86_64.tar.gz -o envplate_x86_64.tar.gz
tar -xf envplate_$(uname -m).tar.gz
chmod +x envplate
EOF

Actual Behavior

• uname -m will give aarch64 instead and thus cannot match to arm64 in release filename.

Steps to Reproduce (including precondition)

Try building Docker image with this Dockerfile in M1/M2 Mac (Silicon/ARM processor):

FROM alpine

RUN apk add curl
RUN curl -LJ --silent https://github.com/kreuzwerker/envplate/releases/download/v1.0.3/envplate_1.0.3_Linux_$(uname -m).tar.gz

Your Environment

• OS: Alpine 3.18
• envplate version: 1.0.2, 1.0.3

[back-2-95]

My current workaround:

FROM alpine AS envplate-builder

ARG VERSION=1.0.3
ARG TARGETPLATFORM

RUN case ${TARGETPLATFORM} in "linux/amd64") ARCH=x86_64 ;; "linux/arm64") ARCH=arm64 ;; esac && echo "$ARCH" && \
    wget -q https://github.com/kreuzwerker/envplate/releases/download/v${VERSION}/envplate_${VERSION}_Linux_${ARCH}.tar.gz -O /envplate && \
    chmod +x /envplate