From 2374c7619263a4c50b42d9f721667c3a0a12682d Mon Sep 17 00:00:00 2001
From: Sander Declerck <sander@sdsoftware.be>
Date: Wed, 17 Dec 2025 09:35:10 +0100
Subject: [PATCH] Check current safe-chain version in installation script

---
 install-scripts/install-safe-chain.ps1 | 46 ++++++++++++++++++++++++++
 install-scripts/install-safe-chain.sh  | 38 +++++++++++++++++++++
 2 files changed, 84 insertions(+)

diff --git a/install-scripts/install-safe-chain.ps1 b/install-scripts/install-safe-chain.ps1
index 9c0dcf7..16d2fc0 100644
--- a/install-scripts/install-safe-chain.ps1
+++ b/install-scripts/install-safe-chain.ps1
@@ -30,6 +30,46 @@ function Write-Error-Custom {
     exit 1
 }
 
+# Get currently installed version of safe-chain
+function Get-InstalledVersion {
+    # Check if safe-chain command exists
+    if (-not (Get-Command safe-chain -ErrorAction SilentlyContinue)) {
+        return $null
+    }
+
+    try {
+        # Execute safe-chain -v and capture output
+        $output = & safe-chain -v 2>&1
+
+        # Extract version from "Current safe-chain version: X.Y.Z" output
+        if ($output -match "Current safe-chain version:\s*(.+)") {
+            return $matches[1].Trim()
+        }
+
+        return $null
+    }
+    catch {
+        return $null
+    }
+}
+
+# Check if the requested version is already installed
+function Test-VersionInstalled {
+    param([string]$RequestedVersion)
+
+    $installedVersion = Get-InstalledVersion
+
+    if ([string]::IsNullOrWhiteSpace($installedVersion)) {
+        return $false
+    }
+
+    # Strip leading 'v' from versions if present for comparison
+    $requestedClean = $RequestedVersion -replace '^v', ''
+    $installedClean = $installedVersion -replace '^v', ''
+
+    return $requestedClean -eq $installedClean
+}
+
 # Fetch latest release version tag from GitHub
 function Get-LatestVersion {
     try {
@@ -114,6 +154,12 @@ function Install-SafeChain {
         $Version = Get-LatestVersion
     }
 
+    # Check if the requested version is already installed
+    if (Test-VersionInstalled -RequestedVersion $Version) {
+        Write-Info "safe-chain $Version is already installed"
+        exit 0
+    }
+
     # Build installation message
     $installMsg = "Installing safe-chain $Version"
     if ($ci) {
diff --git a/install-scripts/install-safe-chain.sh b/install-scripts/install-safe-chain.sh
index 37d1710..54051c9 100755
--- a/install-scripts/install-safe-chain.sh
+++ b/install-scripts/install-safe-chain.sh
@@ -54,6 +54,38 @@ command_exists() {
     command -v "$1" >/dev/null 2>&1
 }
 
+# Get currently installed version of safe-chain
+get_installed_version() {
+    if ! command_exists safe-chain; then
+        echo ""
+        return
+    fi
+
+    # Extract version from "Current safe-chain version: X.Y.Z" output
+    installed_version=$(safe-chain -v 2>/dev/null | grep "Current safe-chain version:" | sed -E 's/.*: (.*)/\1/')
+    echo "$installed_version"
+}
+
+# Check if the requested version is already installed
+is_version_installed() {
+    requested_version="$1"
+    installed_version=$(get_installed_version)
+
+    if [ -z "$installed_version" ]; then
+        return 1  # Not installed
+    fi
+
+    # Strip leading 'v' from versions if present for comparison
+    requested_clean=$(echo "$requested_version" | sed 's/^v//')
+    installed_clean=$(echo "$installed_version" | sed 's/^v//')
+
+    if [ "$requested_clean" = "$installed_clean" ]; then
+        return 0  # Same version installed
+    else
+        return 1  # Different version installed
+    fi
+}
+
 # Fetch latest release version tag from GitHub
 fetch_latest_version() {
     # Try using GitHub API to get the latest release tag
@@ -155,6 +187,12 @@ main() {
         VERSION=$(fetch_latest_version)
     fi
 
+    # Check if the requested version is already installed
+    if is_version_installed "$VERSION"; then
+        info "safe-chain ${VERSION} is already installed"
+        exit 0
+    fi
+
     # Build installation message
     INSTALL_MSG="Installing safe-chain ${VERSION}"
     if [ "$USE_CI_SETUP" = "true" ]; then