First PS script

Author: Gijsreyn

docs/installing-nightly.md

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+# Installing the "Nightly" build of DSC CLI
+
+> **Note**: Nightly builds contain the latest development features but may have bugs or breaking
+> changes. Only install if you want to test unreleased functionality. If you encounter issues,
+> please [open an issue](https://github.com/PowerShell/DSC/issues/new).
+
+## Via script
+
+> **Note**: This script requires the [GitHub CLI](https://cli.github.com/) to have already been
+> installed.
+
+### DSC CLI
+
+This will install the latest nightly DSC CLI binary:
+
+- **Windows**: `%LOCALAPPDATA%\dsc\dsc.exe`
+- **Linux/macOS**: `~/.dsc/bin/dsc`
+
+1. (macOS/Linux) Run the following:
+
+   ```sh
+   bash <(curl -Ls https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.sh)
+   ```
+
+1. (Windows) Run the following in a PowerShell window:
+
+   ```powershell
+   iex "& { $(irm https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.ps1) }"
+   ```
+
+1. Add the installation directory to your PATH environment variable to use `dsc` from any location.
+
+## Manual
+
+We are not currently publishing "nightly" releases, but you can grab the latest bits by viewing
+the latest Action workflows for the `main` branch (or any other branch).
+
+The easiest way to get these artifacts is through the GitHub site. Follow
+[this link](https://github.com/PowerShell/DSC/actions/workflows/rust.yml?query=branch%3Amain+is%3Asuccess)
+to view the latest successful Action workflows for the `main` branch. Select it to show the related
+artifacts.
+
+On the details page, select the artifact for your platform:
+
+- `windows-bin` for Windows
+- `linux-bin` for Linux
+- `macos-bin` for macOS
+
+Extract the archive and place the `dsc` executable (or `dsc.exe` on Windows) in a directory in
+your PATH.
+
+## Advanced Script Options
+
+### DSC CLI
+
+- macOS/Linux
+
+   ```sh
+   # install to a custom directory
+   bash <(curl -Ls https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.sh) --install-path /usr/local/bin
+
+   # install from a fork repo
+   bash <(curl -Ls https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.sh) --repo myusername/DSC
+
+   # install from a custom branch
+   bash <(curl -Ls https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.sh) --branch feature-branch
+
+   # install from a specific github action run
+   bash <(curl -Ls https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.sh) --run-id 6146657618
+   ```
+
+- Windows
+
+   ```powershell
+   # install to a custom directory
+   iex "& { $(irm https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.ps1) } -InstallPath C:\tools\dsc"
+
+   # install from a fork repo
+   iex "& { $(irm https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.ps1) } -Repo myusername/DSC"
+
+   # install from a custom branch
+   iex "& { $(irm https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.ps1) } -Branch feature-branch"
+
+   # install from a specific github action run
+   iex "& { $(irm https://raw.githubusercontent.com/PowerShell/DSC/refs/heads/main/sharedScripts/install_cli_nightly.ps1) } -RunId 6146657618"
+   ```

sharedScripts/install_cli_nightly.ps1

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+[cmdletbinding()]
+param(
+   [string]$RunId,
+   [string]$Branch,
+   [string]$Repo,
+   [string]$InstallPath
+)
+
+$ErrorActionPreference="Stop"
+
+if ($null -eq (Get-Command "gh" -ErrorAction SilentlyContinue)) { 
+    throw "Please install the GitHub CLI: https://cli.github.com/"
+}
+
+$platform = if ($IsWindows) { "windows" } elseif ($IsLinux) { "linux" } elseif ($IsMacOS) { "macos" } else { throw "Unsupported OS" }
+
+# Fetch
+if (!$InstallPath) {
+  # Default install paths by platform
+  if ($IsWindows) {
+    $InstallPath = [System.IO.Path]::combine($env:LOCALAPPDATA, "dsc")
+  } else {
+    $InstallPath = [System.IO.Path]::combine($HOME, ".dsc", "bin")
+  }
+}
+if (!$Repo) {
+  $Repo = "PowerShell/DSC"
+}
+if (!$Branch) {
+  $Branch = "main"
+}
+if (!$RunId) {
+  $RunId = & gh run list -R $Repo --branch $Branch --workflow rust --status success -L 1 --json databaseId -q ".[0].databaseId"; if(!$?) { throw }
+  if (!$RunId) {
+    throw "Failed to find a successful build to install from"
+  }
+}
+
+$tmpDir = [System.IO.Path]::combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName())
+& gh run download -R $Repo $RunId -n "$platform-bin" --dir $tmpDir; if(!$?) { throw }
+
+$tar = Get-ChildItem -Path $tmpDir | Select-Object -First 1
+if (!$tar) {
+  throw "Failed to find downloaded artifact"
+}
+
+if (-not (Get-Command "tar" -ErrorAction SilentlyContinue)) {
+    throw "Please install 'tar' to extract the downloaded artifact."
+}
+
+tar -xf $tar.FullName -C $tmpDir; if(!$?) { throw }
+
+$installationFiles = Join-Path $tmpDir 'bin' 'debug'
+New-Item -ItemType Directory -Force -Path $InstallPath | Out-Null
+Move-Item -Path "$installationFiles/*" -Destination $InstallPath -Force -ErrorAction Ignore
+
+$dscExe = if ($IsWindows) { Join-Path $InstallPath "dsc.exe" } else { Join-Path $InstallPath "dsc" }
+$versionStdout = & $dscExe --version; if(!$?) { throw }
+$version = $versionStdout -replace 'dsc ', ''
+Write-Host "Installed DSC CLI $version from https://github.com/$Repo/actions/runs/$RunId to $InstallPath"
+Write-Host "Make sure to add $InstallPath to your PATH environment variable to use the 'dsc' command."
+
+# Cleanup
+Remove-Item $tmpDir -Recurse