fix(install): avoid self-linking installed binary

Author: GaspardKirira

vix-site/public/install.ps1

@@ -217,12 +217,18 @@ function Install-Cli([string]$archivePath, [string]$tmpDir) {
     Select-Object -First 1
 
   if (-not $exeCandidate) {
-    Die "archive does not contain $BinName"
+    Die "SDK archive does not contain $BinName"
   }
 
   $exe = Join-Path $BinDir $BinName
 
-  Copy-Item -LiteralPath $exeCandidate.FullName -Destination $exe -Force
+  if (-not [string]::Equals(
+    $exeCandidate.FullName,
+    $exe,
+    [System.StringComparison]::OrdinalIgnoreCase
+  )) {
+    Copy-Item -LiteralPath $exeCandidate.FullName -Destination $exe -Force
+  }
 
   return $exe
 }

vix-site/public/install.sh

@@ -267,9 +267,12 @@ install_sdk() {
   [ -n "$target" ] || die "could not find installed '$BIN_NAME'"
 
   chmod +x "$target"
-  ln -sf "$target" "$VIX_INSTALL_BIN_DIR/$BIN_NAME"
 
   DEST="$VIX_INSTALL_BIN_DIR/$BIN_NAME"
+
+  if [ "$target" != "$DEST" ]; then
+    ln -sf "$target" "$DEST"
+  fi
 }
 
 detect_platform