feat: add Powershell install script

Author: agateau-gg

scripts/windows-installer.ps1

@@ -0,0 +1,88 @@
+#Requires -Version 5
+param($install_dir)
+
+# This script can be used to download and install src-fingerprint on Windows,
+# from a PowerShell prompt. Refer to src-fingerprint README for more details.
+
+$DEFAULT_INSTALL_DIR = "$env:APPDATA\src-fingerprint"
+
+# Quit if anything goes wrong
+$old_erroractionpreference = $erroractionpreference
+$erroractionpreference = 'stop'
+
+if (($PSVersionTable.PSVersion.Major) -lt 5) {
+    Write-Output "PowerShell 5 or later is required to run this installer."
+    Write-Output "Upgrade PowerShell: https://docs.microsoft.com/en-us/powershell/scripting/setup/installing-windows-powershell"
+    break
+}
+
+# Required to uncompress zip files
+Add-Type -Assembly "System.IO.Compression.FileSystem"
+
+function request_install_dir() {
+    $dir = Read-Host -Prompt "Installation dir [$DEFAULT_INSTALL_DIR]"
+    if ($dir -eq "") {
+        $dir = $DEFAULT_INSTALL_DIR
+    }
+    return $dir
+}
+
+function recreate_dir($dir) {
+    if (test-path $dir) {
+        Remove-Item $dir -Recurse -Force
+    }
+    mkdir $dir > $null
+}
+
+function download($url, $dst_file) {
+    $client = New-Object Net.Webclient
+    $client.DownloadFile($url, $dst_file)
+}
+
+function extract($zip_file, $dst_dir) {
+    [IO.Compression.ZipFile]::ExtractToDirectory($zip_file, $dst_dir)
+}
+
+function get_latest_version() {
+    $response = Invoke-RestMethod -Uri "https://api.github.com/repos/GitGuardian/src-fingerprint/releases/latest"
+    $tag = $response.tag_name
+    if ($tag.Length -lt 2 -or $tag[0] -ne "v") {
+        Write-Error -Category InvalidResult -Message "Invalid tag name: '$tag'"
+        exit
+    }
+    # $tag is "v1.2.3", we want "1.2.3"
+    $tag.SubString(1)
+}
+
+function main() {
+    if ($install_dir -eq $null) {
+        $install_dir = request_install_dir
+    }
+
+    $tmp_dir = "$install_dir\tmp"
+    recreate_dir $tmp_dir
+
+    Write-Output "Fetching version number of latest release"
+    $version = get_latest_version
+    Write-Output "Latest version is $version"
+
+    $zip_url = "https://github.com/GitGuardian/src-fingerprint/releases/download/v${version}/src-fingerprint_${version}_Windows_amd64.zip"
+
+    Write-Output "Downloading $zip_url"
+    $zip_file = "$tmp_dir\install.zip"
+    download $ZIP_URL $zip_file
+
+    Write-Output 'Extracting'
+    extract $zip_file $tmp_dir
+    Move-Item -Path "$tmp_dir\src-fingerprint_${VERSION}_Windows_*\*" -Destination $install_dir -Force
+
+    Write-Output 'Cleaning'
+    Remove-Item $tmp_dir -Recurse -Force
+
+    Write-Output "All done, src-fingerprint is now available at $install_dir\src-fingerprint.exe"
+}
+
+main
+
+# Reset $erroractionpreference to original value
+$erroractionpreference = $old_erroractionpreference