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MariusStorhaugMariusStorhaug
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Refactor PowerShell installation: enhance version resolution and improve error handling for Linux and macOS; update Windows installation process to ensure proper version detection and installation.
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‎action.yml‎

Lines changed: 117 additions & 79 deletions
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name: Install PowerShell
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description: Install a specific version of PowerShell Core on any GitHub runner (Linux, macOS, Windows). Installs only when the requested version is not already present.
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description: >-
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Install a specific version —or the latest stable version— of PowerShell Core
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on any GitHub runner (Linux, macOS, Windows).
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Skips the install if the requested version is already present.
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author: PSModule
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branding:
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icon: terminal
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color: purple
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inputs:
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Version:
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description: Exact PowerShell version to install (e.g. 7.4.1)
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required: true
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description: >-
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PowerShell version to install (`7.4.1`, `7.3.10`, or `latest` for the
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newest stable release).
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Defaults to **latest**.
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required: false
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default: latest
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runs:
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using: composite
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steps:
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- name: Install PowerShell (Linux)
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if: runner.os == 'Linux'
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env:
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REQUESTED_VERSION: ${{ inputs.Version }}
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shell: bash
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run: |
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set -e
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DETECTED_VERSION=$(pwsh -NoLogo -NoProfile -Command '$PSVersionTable.PSVersion.ToString()' 2>/dev/null || true)
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if [[ "$DETECTED_VERSION" == "$REQUESTED_VERSION" ]]; then
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echo "PowerShell $DETECTED_VERSION already installed. Skipping."
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exit 0
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- name: Install PowerShell (Linux)
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if: runner.os == 'Linux'
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shell: bash
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env:
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REQUESTED_VERSION: ${{ inputs.Version }}
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run: |
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set -e
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# Resolve "latest" to a concrete version number (e.g. 7.4.1)
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if [[ -z "$REQUESTED_VERSION" || "$REQUESTED_VERSION" == "latest" ]]; then
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REQUESTED_VERSION=$(curl -s https://api.github.com/repos/PowerShell/PowerShell/releases/latest \
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| grep -oP '"tag_name":\s*"\K([^"]+)' | sed 's/^v//')
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echo "Latest stable PowerShell release detected: $REQUESTED_VERSION"
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fi
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DETECTED_VERSION=$(pwsh -NoLogo -NoProfile -Command '$PSVersionTable.PSVersion.ToString()' 2>/dev/null || true)
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if [[ "$DETECTED_VERSION" == "$REQUESTED_VERSION" ]]; then
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echo "PowerShell $DETECTED_VERSION already installed. Skipping."
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exit 0
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fi
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if command -v apt-get >/dev/null; then
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echo "Using APT package manager (Debian/Ubuntu)…"
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if ! grep -q "packages.microsoft.com" /etc/apt/sources.list /etc/apt/sources.list.d/* 2>/dev/null; then
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wget -qO- https://packages.microsoft.com/keys/microsoft.asc \
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| sudo tee /etc/apt/trusted.gpg.d/microsoft.asc > /dev/null
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DIST_CODENAME=$(lsb_release -cs)
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sudo add-apt-repository \
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"deb [arch=$(dpkg --print-architecture)] https://packages.microsoft.com/ubuntu/$DIST_CODENAME/prod $DIST_CODENAME main"
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fi
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if command -v apt-get >/dev/null; then
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echo "Using APT package manager (Debian/Ubuntu)..."
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if ! grep -q "packages.microsoft.com" /etc/apt/sources.list /etc/apt/sources.list.d/* 2>/dev/null; then
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wget -qO- https://packages.microsoft.com/keys/microsoft.asc | sudo tee /etc/apt/trusted.gpg.d/microsoft.asc > /dev/null
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DIST_CODENAME=$(lsb_release -cs)
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sudo add-apt-repository "deb [arch=$(dpkg --print-architecture)] https://packages.microsoft.com/ubuntu/$DIST_CODENAME/prod $DIST_CODENAME main"
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fi
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sudo apt-get update -y
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EXACT_PKG=$(apt-cache madison powershell | awk '{print $3}' | grep -E "^${REQUESTED_VERSION}(-|$)" | head -n1 || true)
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if [[ -n "$EXACT_PKG" ]]; then
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sudo apt-get install -y powershell=$EXACT_PKG
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else
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ARCH=$(dpkg --print-architecture)
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DEB_NAME="powershell_${REQUESTED_VERSION}-1.deb_${ARCH}.deb"
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URL="https://github.com/PowerShell/PowerShell/releases/download/v${REQUESTED_VERSION}/${DEB_NAME}"
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wget -q "$URL" -O "$DEB_NAME"
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sudo dpkg -i "$DEB_NAME" || sudo apt-get -f install -y
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fi
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sudo apt-get update -y
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EXACT_PKG=$(apt-cache madison powershell | awk '{print $3}' \
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| grep -E "^${REQUESTED_VERSION}(-|$)" | head -n1 || true)
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if [[ -n "$EXACT_PKG" ]]; then
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sudo apt-get install -y powershell=$EXACT_PKG
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else
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echo "Unsupported Linux distribution (no apt-get)."
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exit 1
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ARCH=$(dpkg --print-architecture)
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DEB_NAME="powershell_${REQUESTED_VERSION}-1.deb_${ARCH}.deb"
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URL="https://github.com/PowerShell/PowerShell/releases/download/v${REQUESTED_VERSION}/${DEB_NAME}"
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wget -q "$URL" -O "$DEB_NAME"
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sudo dpkg -i "$DEB_NAME" || sudo apt-get -f install -y
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fi
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else
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echo "Unsupported Linux distribution (no apt-get)."
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exit 1
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fi
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- name: Install PowerShell (macOS)
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if: runner.os == 'macOS'
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env:
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REQUESTED_VERSION: ${{ inputs.Version }}
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shell: bash
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run: |
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set -e
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DETECTED_VERSION=$(pwsh -NoLogo -NoProfile -Command '$PSVersionTable.PSVersion.ToString()' 2>/dev/null || true)
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if [[ "$DETECTED_VERSION" == "$REQUESTED_VERSION" ]]; then
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echo "PowerShell $DETECTED_VERSION already installed. Skipping."
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exit 0
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fi
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- name: Install PowerShell (macOS)
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if: runner.os == 'macOS'
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shell: bash
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env:
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REQUESTED_VERSION: ${{ inputs.Version }}
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run: |
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set -e
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if brew info --cask powershell@$REQUESTED_VERSION >/dev/null 2>&1; then
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brew install --cask powershell@$REQUESTED_VERSION
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# Resolve "latest" to concrete version number
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if [[ -z "$REQUESTED_VERSION" || "$REQUESTED_VERSION" == "latest" ]]; then
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REQUESTED_VERSION=$(curl -s https://api.github.com/repos/PowerShell/PowerShell/releases/latest \
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| grep -oP '"tag_name":\s*"\K([^"]+)' | sed 's/^v//')
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echo "Latest stable PowerShell release detected: $REQUESTED_VERSION"
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fi
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DETECTED_VERSION=$(pwsh -NoLogo -NoProfile -Command '$PSVersionTable.PSVersion.ToString()' 2>/dev/null || true)
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if [[ "$DETECTED_VERSION" == "$REQUESTED_VERSION" ]]; then
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echo "PowerShell $DETECTED_VERSION already installed. Skipping."
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exit 0
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fi
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if brew info --cask powershell@$REQUESTED_VERSION >/dev/null 2>&1; then
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brew install --cask powershell@$REQUESTED_VERSION
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else
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ARCH=$(uname -m)
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if [[ "$ARCH" == "arm64" ]]; then
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PKG_NAME="powershell-${REQUESTED_VERSION}-osx-arm64.pkg"
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else
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ARCH=$(uname -m)
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if [[ "$ARCH" == "arm64" ]]; then PKG_NAME="powershell-${REQUESTED_VERSION}-osx-arm64.pkg"; else PKG_NAME="powershell-${REQUESTED_VERSION}-osx-x64.pkg"; fi
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URL="https://github.com/PowerShell/PowerShell/releases/download/v${REQUESTED_VERSION}/${PKG_NAME}"
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curl -sSL "$URL" -o "$PKG_NAME"
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sudo installer -pkg "$PKG_NAME" -target /
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PKG_NAME="powershell-${REQUESTED_VERSION}-osx-x64.pkg"
75102
fi
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URL="https://github.com/PowerShell/PowerShell/releases/download/v${REQUESTED_VERSION}/${PKG_NAME}"
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curl -sSL "$URL" -o "$PKG_NAME"
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sudo installer -pkg "$PKG_NAME" -target /
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fi
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- name: Install PowerShell (Windows)
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if: runner.os == 'Windows'
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shell: powershell
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env:
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REQUESTED_VERSION: ${{ inputs.Version }}
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run: |
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# Resolve "latest" to concrete version number
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if (-not $env:REQUESTED_VERSION -or $env:REQUESTED_VERSION -eq 'latest') {
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$latest = (Invoke-RestMethod -Uri 'https://api.github.com/repos/PowerShell/PowerShell/releases/latest').tag_name.TrimStart('v')
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Write-Host "Latest stable PowerShell release detected: $latest"
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$env:REQUESTED_VERSION = $latest
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}
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try {
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$detected = (pwsh -NoLogo -NoProfile -Command '$PSVersionTable.PSVersion.ToString()')
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} catch {
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$detected = $null
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}
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Write-Host "Detected PowerShell version: $detected"
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Write-Host "Requested PowerShell version: $env:REQUESTED_VERSION"
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if ($detected -eq $env:REQUESTED_VERSION) {
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Write-Host "PowerShell $detected already installed. Skipping."
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exit 0
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}
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- name: Install PowerShell (Windows)
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if: runner.os == 'Windows'
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env:
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REQUESTED_VERSION: ${{ inputs.Version }}
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shell: powershell
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run: |
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try {
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$detected = (pwsh -NoLogo -NoProfile -Command '$PSVersionTable.PSVersion.ToString()')
85-
} catch {
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$detected = $null
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}
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Write-Host "Detected PowerShell version: $detected"
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Write-Host "Requested PowerShell version: $env:REQUESTED_VERSION"
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if ($detected -eq $env:REQUESTED_VERSION) {
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Write-Host "PowerShell $detected already installed. Skipping."
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exit 0
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}
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$msi = "PowerShell-$($env:REQUESTED_VERSION)-win-x64.msi"
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$url = "https://github.com/PowerShell/PowerShell/releases/download/v$($env:REQUESTED_VERSION)/$msi"
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Invoke-WebRequest -Uri $url -OutFile $msi -UseBasicParsing
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Start-Process msiexec.exe -ArgumentList '/i', $msi, '/quiet', '/norestart' -Wait
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$msi = "PowerShell-$($env:REQUESTED_VERSION)-win-x64.msi"
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$url = "https://github.com/PowerShell/PowerShell/releases/download/v$($env:REQUESTED_VERSION)/$msi"
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Invoke-WebRequest -Uri $url -OutFile $msi -UseBasicParsing
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Start-Process msiexec.exe -ArgumentList '/i', $msi, '/quiet', '/norestart' -Wait

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