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CI: Robust and portable micromamba environment setup #30521

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CI: Robust and portable micromamba environment setup #30521

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Improve micromamba setup: version pinning, platform detection, robust…
Sanjaykumar030 Sep 6, 2025
e333664
Refactor setup script for micromamba installation
Sanjaykumar030 Sep 7, 2025
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43 changes: 33 additions & 10 deletions .devcontainer/setup.sh
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Original file line number Diff line number Diff line change
@@ -1,13 +1,36 @@
#!/bin/bash
#!/usr/bin/env bash
set -euo pipefail

set -e
MM_VERSION="${MM_VERSION:-latest}"

"${SHELL}" <(curl -Ls micro.mamba.pm/install.sh) < /dev/null
case "$(uname -s)-$(uname -m)" in
Linux-x86_64) MM_PLATFORM="linux-64" ;;
Linux-aarch64) MM_PLATFORM="linux-aarch64" ;;
Darwin-x86_64) MM_PLATFORM="osx-64" ;;
Darwin-arm64) MM_PLATFORM="osx-arm64" ;;
*) echo "Unsupported platform: $(uname -s)-$(uname -m)" >&2; exit 1 ;;
esac

conda init --all
micromamba shell init -s bash
micromamba env create -f environment.yml --yes
# Note that `micromamba activate mpl-dev` doesn't work, it must be run by the
# user (same applies to `conda activate`)
echo "envs_dirs:
- /home/codespace/micromamba/envs" > /opt/conda/.condarc
INSTALL_DIR="/usr/local/bin"

if ! command -v micromamba >/dev/null; then
tmp_tar=$(mktemp)
curl -Ls "https://micro.mamba.pm/api/micromamba/${MM_PLATFORM}/${MM_VERSION}" -o "${tmp_tar}"
tar --no-same-owner --strip-components=1 -xvjf "${tmp_tar}" -C "${INSTALL_DIR}" "bin/micromamba"
rm -f "${tmp_tar}"
fi

export MAMBA_ROOT_PREFIX="${MAMBA_ROOT_PREFIX:-${HOME}/micromamba}"
eval "$(micromamba shell hook --shell bash)"

micromamba env create --file environment.yml --platform "${MM_PLATFORM}" --yes \
|| micromamba env update --file environment.yml --platform "${MM_PLATFORM}" --yes --prune

if [[ -d /opt/conda ]]; then
{ echo 'envs_dirs:'; echo " - ${MAMBA_ROOT_PREFIX}/envs"; } | sudo tee /opt/conda/.condarc >/dev/null || true
fi

env_name=$(grep -E '^name:' environment.yml | sed -E 's/^name:[[:space:]]*//')
env_name=${env_name:-mpl-dev}

echo "micromamba ready. Activate with: micromamba activate ${env_name}"
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