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images/universal: preserve upstream user environment when switching to coder #331

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53d5a38
images/universal: rename codespace user to coder instead of recreatin…
matifali May 12, 2026
b5de908
docs: clarify universal image preserves upstream user environment
matifali May 12, 2026
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2 changes: 1 addition & 1 deletion images/universal/README.md
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Expand Up @@ -4,4 +4,4 @@

## Description

Microsoft's [Universal Dev Container Image](https://github.com/devcontainers/images/tree/main/src/universal) extended with a `coder` user.
Microsoft's [Universal Dev Container Image](https://github.com/devcontainers/images/tree/main/src/universal) with the upstream `codespace` user renamed to `coder` so the base image's home directory and shell environment are preserved.
16 changes: 7 additions & 9 deletions images/universal/ubuntu.Dockerfile
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Expand Up @@ -12,14 +12,12 @@ RUN rm -R /opt/conda && \
# Install Chrome for AI Browser Testing
RUN yes | npx playwright install chrome

# Create `coder` user
RUN userdel -r codespace && \
useradd coder \
--create-home \
--shell=/bin/bash \
--groups=docker \
--uid=1000 \
--user-group && \
echo "coder ALL=(ALL) NOPASSWD:ALL" >>/etc/sudoers.d/nopasswd
# Rename the upstream `codespace` user to `coder` so we preserve the
# existing home directory and shell environment provided by the base image.
RUN usermod -l coder codespace && \
groupmod -n coder codespace && \
usermod -d /home/coder -m coder && \
usermod -aG docker,sudo coder && \
echo "coder ALL=(ALL) NOPASSWD:ALL" >>/etc/sudoers.d/nopasswd

USER coder
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