Address more code quality issues

install-scripts/install-safe-chain.ps1

@@ -9,6 +9,18 @@ param(
 
 $Version = $env:SAFE_CHAIN_VERSION  # Will be fetched from latest release if not set
 $SafeChainBase = if ($env:SAFE_CHAIN_DIR) { $env:SAFE_CHAIN_DIR } else { Join-Path $env:USERPROFILE ".safe-chain" }
+
+# Validate $SafeChainBase before any filesystem operations
+if (-not [System.IO.Path]::IsPathRooted($SafeChainBase)) {
+    Write-Host "[ERROR] SAFE_CHAIN_DIR must be an absolute path, got: $SafeChainBase" -ForegroundColor Red; exit 1
+}
+if ($SafeChainBase -match '\.\.') {
+    Write-Host "[ERROR] SAFE_CHAIN_DIR must not contain path traversal (..)" -ForegroundColor Red; exit 1
+}
+if ($SafeChainBase -match '^[A-Za-z]:[/\\]?$' -or $SafeChainBase -eq '/') {
+    Write-Host "[ERROR] SAFE_CHAIN_DIR cannot be a root or drive-root directory" -ForegroundColor Red; exit 1
+}
+
 $InstallDir = Join-Path $SafeChainBase "bin"
 $RepoUrl = "https://github.com/AikidoSec/safe-chain"
 
@@ -150,19 +162,6 @@ function Remove-VoltaInstallation {
 
 # Main installation
 function Install-SafeChain {
-    # Validate SAFE_CHAIN_DIR before using it to write files
-    if ($env:SAFE_CHAIN_DIR) {
-        if (-not [System.IO.Path]::IsPathRooted($env:SAFE_CHAIN_DIR)) {
-            Write-Error-Custom "SAFE_CHAIN_DIR must be an absolute path, got: $($env:SAFE_CHAIN_DIR)"
-        }
-        if ($env:SAFE_CHAIN_DIR -match '\.\.') {
-            Write-Error-Custom "SAFE_CHAIN_DIR must not contain path traversal (..)"
-        }
-        if ($env:SAFE_CHAIN_DIR -match '^[A-Za-z]:[/\\]?$' -or $env:SAFE_CHAIN_DIR -eq '/') {
-            Write-Error-Custom "SAFE_CHAIN_DIR cannot be a root or drive-root directory"
-        }
-    }
-
     # Show deprecation warning if SAFE_CHAIN_VERSION is set
     if (-not [string]::IsNullOrWhiteSpace($env:SAFE_CHAIN_VERSION)) {
         Write-Warn "SAFE_CHAIN_VERSION environment variable is deprecated."

install-scripts/install-safe-chain.sh

@@ -9,6 +9,19 @@ set -e  # Exit on error
 # Configuration
 VERSION="${SAFE_CHAIN_VERSION:-}"  # Will be fetched from latest release if not set
 SAFE_CHAIN_BASE="${SAFE_CHAIN_DIR:-${HOME}/.safe-chain}"
+
+# Validate SAFE_CHAIN_BASE before any filesystem operations
+case "${SAFE_CHAIN_BASE}" in
+    /*) ;;
+    *) printf '[ERROR] SAFE_CHAIN_DIR must be an absolute path, got: %s\n' "${SAFE_CHAIN_BASE}" >&2; exit 1 ;;
+esac
+case "${SAFE_CHAIN_BASE}" in
+    *../*|*/..*|..) printf '[ERROR] SAFE_CHAIN_DIR must not contain path traversal (..)\n' >&2; exit 1 ;;
+esac
+if [ "${SAFE_CHAIN_BASE}" = "/" ]; then
+    printf '[ERROR] SAFE_CHAIN_DIR cannot be the root directory\n' >&2; exit 1
+fi
+
 INSTALL_DIR="${SAFE_CHAIN_BASE}/bin"
 REPO_URL="https://github.com/AikidoSec/safe-chain"
 
@@ -247,20 +260,6 @@ parse_arguments() {
 
 # Main installation
 main() {
-    # Validate SAFE_CHAIN_DIR before using it to write files
-    if [ -n "${SAFE_CHAIN_DIR}" ]; then
-        case "${SAFE_CHAIN_DIR}" in
-            /*) ;; # absolute path — OK
-            *) error "SAFE_CHAIN_DIR must be an absolute path, got: ${SAFE_CHAIN_DIR}" ;;
-        esac
-        case "${SAFE_CHAIN_DIR}" in
-            *../*|*/..*|..) error "SAFE_CHAIN_DIR must not contain path traversal (..)" ;;
-        esac
-        if [ "${SAFE_CHAIN_DIR}" = "/" ]; then
-            error "SAFE_CHAIN_DIR cannot be the root directory"
-        fi
-    fi
-
     # Initialize argument flags
     USE_CI_SETUP=false
 

install-scripts/uninstall-safe-chain.ps1

@@ -5,6 +5,18 @@
 # Use HOME on Unix, USERPROFILE on Windows (PowerShell Core is cross-platform)
 $HomeDir = if ($env:HOME) { $env:HOME } else { $env:USERPROFILE }
 $DotSafeChain = if ($env:SAFE_CHAIN_DIR) { $env:SAFE_CHAIN_DIR } else { Join-Path $HomeDir ".safe-chain" }
+
+# Validate $DotSafeChain before any filesystem operations
+if (-not [System.IO.Path]::IsPathRooted($DotSafeChain)) {
+    Write-Host "[ERROR] SAFE_CHAIN_DIR must be an absolute path, got: $DotSafeChain" -ForegroundColor Red; exit 1
+}
+if ($DotSafeChain -match '\.\.') {
+    Write-Host "[ERROR] SAFE_CHAIN_DIR must not contain path traversal (..)" -ForegroundColor Red; exit 1
+}
+if ($DotSafeChain -match '^[A-Za-z]:[/\\]?$' -or $DotSafeChain -eq '/') {
+    Write-Host "[ERROR] SAFE_CHAIN_DIR cannot be a root or drive-root directory" -ForegroundColor Red; exit 1
+}
+
 $InstallDir = Join-Path $DotSafeChain "bin"
 
 # Helper functions
@@ -75,19 +87,6 @@ function Remove-VoltaInstallation {
 
 # Main uninstallation
 function Uninstall-SafeChain {
-    # Validate SAFE_CHAIN_DIR before using it to delete files
-    if ($env:SAFE_CHAIN_DIR) {
-        if (-not [System.IO.Path]::IsPathRooted($env:SAFE_CHAIN_DIR)) {
-            Write-Error-Custom "SAFE_CHAIN_DIR must be an absolute path, got: $($env:SAFE_CHAIN_DIR)"
-        }
-        if ($env:SAFE_CHAIN_DIR -match '\.\.') {
-            Write-Error-Custom "SAFE_CHAIN_DIR must not contain path traversal (..)"
-        }
-        if ($env:SAFE_CHAIN_DIR -match '^[A-Za-z]:[/\\]?$' -or $env:SAFE_CHAIN_DIR -eq '/') {
-            Write-Error-Custom "SAFE_CHAIN_DIR cannot be a root or drive-root directory"
-        }
-    }
-
     Write-Info "Uninstalling safe-chain..."
 
     # Run teardown if safe-chain is available

install-scripts/uninstall-safe-chain.sh

@@ -9,6 +9,18 @@ set -e  # Exit on error
 # Configuration
 DOT_SAFE_CHAIN="${SAFE_CHAIN_DIR:-${HOME}/.safe-chain}"
 
+# Validate DOT_SAFE_CHAIN before any filesystem operations
+case "${DOT_SAFE_CHAIN}" in
+    /*) ;;
+    *) printf '[ERROR] SAFE_CHAIN_DIR must be an absolute path, got: %s\n' "${DOT_SAFE_CHAIN}" >&2; exit 1 ;;
+esac
+case "${DOT_SAFE_CHAIN}" in
+    *../*|*/..*|..) printf '[ERROR] SAFE_CHAIN_DIR must not contain path traversal (..)\n' >&2; exit 1 ;;
+esac
+if [ "${DOT_SAFE_CHAIN}" = "/" ]; then
+    printf '[ERROR] SAFE_CHAIN_DIR cannot be the root directory\n' >&2; exit 1
+fi
+
 # Colors for output
 RED='\033[0;31m'
 GREEN='\033[0;32m'
@@ -139,20 +151,6 @@ remove_nvm_installation() {
 
 # Main uninstallation
 main() {
-    # Validate SAFE_CHAIN_DIR before using it to delete files
-    if [ -n "${SAFE_CHAIN_DIR}" ]; then
-        case "${SAFE_CHAIN_DIR}" in
-            /*) ;; # absolute path — OK
-            *) error "SAFE_CHAIN_DIR must be an absolute path, got: ${SAFE_CHAIN_DIR}" ;;
-        esac
-        case "${SAFE_CHAIN_DIR}" in
-            *../*|*/..*|..) error "SAFE_CHAIN_DIR must not contain path traversal (..)" ;;
-        esac
-        if [ "${SAFE_CHAIN_DIR}" = "/" ]; then
-            error "SAFE_CHAIN_DIR cannot be the root directory"
-        fi
-    fi
-
     SAFE_CHAIN_LOCATION="$DOT_SAFE_CHAIN/bin/safe-chain"
 
     if [ -x "$SAFE_CHAIN_LOCATION" ]; then