mirror of https://github.com/astral-sh/uv
138 lines
3.8 KiB
Bash
Executable File
138 lines
3.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Download required Python versions and install to `bin`
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# Uses prebuilt Python distributions from indygreg/python-build-standalone
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#
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# Requirements
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#
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# macOS
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#
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# brew install zstd jq coreutils
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#
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# Ubuntu
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#
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# apt install zstd jq
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#
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# Arch Linux
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#
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# pacman -S zstd jq libxcrypt-compat
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#
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# Windows
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#
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# winget install jqlang.jq
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#
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# Usage
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#
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# ./scripts/bootstrap/install.sh
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#
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# The Python versions are installed from `.python_versions`.
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# Python versions are linked in-order such that the _last_ defined version will be the default.
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#
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# Version metadata can be updated with `fetch-version-metadata.py` which requires Python 3.12
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set -euo pipefail
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# Convenience function for displaying URLs
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function urldecode() { : "${*//+/ }"; echo -e "${_//%/\\x}"; }
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# Convenience function for checking that a command exists.
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requires() {
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cmd="$1"
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if ! command -v "$cmd" > /dev/null 2>&1; then
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echo "DEPENDENCY MISSING: $(basename $0) requires $cmd to be installed" >&2
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exit 1
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fi
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}
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requires jq
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requires zstd
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# Setup some file paths
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this_dir=$(realpath "$(dirname "$0")")
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root_dir=$(dirname "$(dirname "$this_dir")")
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bin_dir="$root_dir/bin"
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install_dir="$bin_dir/versions"
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versions_file="$root_dir/.python-versions"
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versions_metadata="$this_dir/versions.json"
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# Determine system metadata
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os=$(uname -s | tr '[:upper:]' '[:lower:]')
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arch=$(uname -m)
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interpreter='cpython'
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# On macOS, we need a newer version of `realpath` for `--relative-to` support
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realpath="$(which grealpath || which realpath)"
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# Utility for linking executables for the version being installed
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# We need to update executables even if the version is already downloaded and extracted
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# to ensure that changes to the precedence of versions are respected
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link_executables() {
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# Use relative paths for links so if the bin is moved they don't break
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local link=$($realpath --relative-to="$bin_dir" "$install_key/install/bin/python3")
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local minor=$(jq --arg key "$key" '.[$key] | .minor' -r < "$versions_metadata")
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# Link as all version tuples, later versions in the file will take precedence
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ln -sf "./$link" "$bin_dir/python$version"
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ln -sf "./$link" "$bin_dir/python3.$minor"
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ln -sf "./$link" "$bin_dir/python3"
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ln -sf "./$link" "$bin_dir/python"
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}
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# Read requested versions into an array
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versions=()
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while IFS= read -r version; do
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versions+=("$version")
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done < "$versions_file"
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# Install each version
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for version in "${versions[@]}"; do
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key="$interpreter-$version-$os-$arch"
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install_key="$install_dir/$interpreter@$version"
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echo "Installing $key"
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if [ -d "$install_key" ]; then
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echo "Already available, skipping download"
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link_executables
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echo "Updated executables for python$version"
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continue
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fi
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url=$(jq --arg key "$key" '.[$key] | .url' -r < "$versions_metadata")
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if [ "$url" == 'null' ]; then
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echo "No matching download for $key"
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exit 1
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fi
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filename=$(basename "$url")
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echo "Downloading $(urldecode "$filename")"
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curl -L --progress-bar -o "$filename" "$url" --output-dir "$this_dir"
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expected_sha=$(jq --arg key "$key" '.[$key] | .sha256' -r < "$versions_metadata")
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if [ "$expected_sha" == 'null' ]; then
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echo "WARNING: no checksum for $key"
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else
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echo -n "Verifying checksum..."
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echo "$expected_sha $this_dir/$filename" | sha256sum -c --quiet
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echo " OK"
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fi
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rm -rf "$install_key"
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echo "Extracting to $($realpath --relative-to="$root_dir" "$install_key")"
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mkdir -p "$install_key"
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zstd -d "$this_dir/$filename" --stdout | tar -x -C "$install_key"
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# Setup the installation
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mv "$install_key/python/"* "$install_key"
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link_executables
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echo "Installed executables for python$version"
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# Cleanup
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rmdir "$install_key/python/"
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rm "$this_dir/$filename"
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done
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echo "Done!"
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