Improve enabling gearman [skip ci]

src/scripts/extensions/gearman.sh

@@ -1,9 +1,9 @@
 # Helper function to add gearman extension.
 add_gearman_helper() {
-  install_packages libgearman-dev
   enable_extension gearman extension
   if ! check_extension gearman; then
     status="Installed and enabled"
+    install_packages libgearman-dev
     if [[ "${version:?}" =~ 5.[3-6] ]]; then
       pecl_install gearman-1.1.2
     elif [[ "${version:?}" =~ 7.0 ]]; then

src/scripts/win32.ps1

@@ -203,16 +203,20 @@ Function Install-PSPackage() {
     $cmdlet
   )
   $module_path = "$bin_dir\$psm1_path.psm1"
+  $imported = $false
+  try {
     if(-not (Test-Path $module_path -PathType Leaf)) {
       $zip_file = "$bin_dir\$package.zip"
       Get-File -Url $url -OutFile $zip_file
-    Expand-Archive -Path $zip_file -DestinationPath $bin_dir -Force
+      Expand-Archive -Path $zip_file -DestinationPath $bin_dir -Force -ErrorAction Stop
     }
-  Import-Module $module_path
-  if($null -eq (Get-Command $cmdlet -ErrorAction SilentlyContinue)) {
-    Install-Module -Name $package -Force
-  } else {
+    Import-Module $module_path -ErrorAction Stop
+    $imported = $null -ne (Get-Command $cmdlet -ErrorAction SilentlyContinue)
+  } catch { }
+  if($imported) {
     Add-ToProfile $current_profile "$package-search" "Import-Module $module_path"
+  } else {
+    Install-Module -Name $package -Force
   }
 }