Improve cache for tools

src/scripts/tools/add_tools.ps1

@@ -200,14 +200,21 @@ Function Add-Tool() {
     [Parameter(Position = 2, Mandatory = $false)]
     $ver_param
   )
-  if (Test-Path $bin_dir\$tool) {
-    Copy-Item $bin_dir\$tool -Destination $bin_dir\$tool.old -Force
-  }
+  $urls = $urls -split ','
   $tool_path = "$bin_dir\$tool"
+  $is_exe = ((($urls[0] | Split-Path -Extension).ToLowerInvariant()) -eq '.exe')
+  if ($is_exe) { $tool_path = "$tool_path.exe" }
+  $tool_ext = if ($is_exe) { '.exe' } else { '' }
+  $url_stream = [System.IO.MemoryStream]::New([System.Text.Encoding]::UTF8.GetBytes($urls[0]))
+  $cache_key = (Get-FileHash -InputStream $url_stream -Algorithm SHA256).Hash.Substring(0, 16)
+  $cache_path = "$env:TEMP\$tool-$cache_key$tool_ext"
+  $status_code = 200
+  if (Test-Path $cache_path -PathType Leaf) {
+    Copy-Item $cache_path -Destination $tool_path -Force
+  } else {
+    $backup_path = "$tool_path.bak"
+    if (Test-Path $tool_path) { Copy-Item $tool_path -Destination $backup_path -Force }
     foreach ($url in $urls){
-    if (($url | Split-Path -Extension) -eq ".exe") {
-      $tool_path = "$tool_path.exe"
-    }
       try {
         $status_code = (Invoke-WebRequest -Passthru -Uri $url -OutFile $tool_path).StatusCode
       } catch {
@@ -215,15 +222,26 @@ Function Add-Tool() {
           try {
             $url = $url.replace("releases/latest/download", "releases/download/" + ([regex]::match((Get-File -Url ($url.split('/release')[0] + "/releases")).Content, "([0-9]+\.[0-9]+\.[0-9]+)/" + ($url.Substring($url.LastIndexOf("/") + 1))).Groups[0].Value).split('/')[0])
             $status_code = (Invoke-WebRequest -Passthru -Uri $url -OutFile $tool_path).StatusCode
-        } catch { }
+          } catch {
+            $status_code = 0
+          }
+        } else {
+          $status_code = 0
         }
       }
       if($status_code -eq 200 -and (Test-Path $tool_path)) {
+        Copy-Item $tool_path -Destination $cache_path -Force
         break
       }
     }
+    if ($status_code -ne 200 -and (Test-Path $backup_path)) {
+      Copy-Item $backup_path -Destination $tool_path -Force
+    }
+    Remove-Item $backup_path -Force -ErrorAction SilentlyContinue
+  }
 
-  if (((Get-ChildItem -Path $bin_dir/* | Where-Object Name -Match "^$tool(.exe|.phar)*$").Count -gt 0)) {
+  $escaped_tool = [regex]::Escape($tool)
+  if (((Get-ChildItem -Path $bin_dir/* | Where-Object Name -Match "^$escaped_tool(\.exe|\.phar)?$").Count -gt 0)) {
     $bat_content = @()
     $bat_content += "@ECHO off"
     $bat_content += "setlocal DISABLEDELAYEDEXPANSION"
@@ -237,8 +255,6 @@ Function Add-Tool() {
   } else {
     if($tool -eq "composer") {
       $env:fail_fast = 'true'
-    } elseif (Test-Path $bin_dir\$tool.old) {
-      Copy-Item $bin_dir\$tool.old -Destination $bin_dir\$tool -Force
     }
     Add-Log $cross $tool "Could not add $tool"
   }

src/scripts/tools/add_tools.sh

@@ -177,15 +177,26 @@ add_tool() {
     sudo mkdir -p "$tool_path_dir"
   fi
   add_path "$tool_path_dir"
-  if [ -e "$tool_path" ]; then
-    sudo cp -aL "$tool_path" /tmp/"$tool"
-  fi
   IFS="," read -r -a url <<<"$url"
+  cache_key=$(get_sha256 "${url[0]}" | head -c 16)
+  cache_path="/tmp/${tool}-${cache_key}"
+  status_code="200"
+  if [ -f "$cache_path" ]; then
+    sudo cp -a "$cache_path" "$tool_path"
+  else
+    [ -f "$tool_path" ] && sudo cp -a "$tool_path" "$tool_path.bak"
     status_code=$(get -v -e "$tool_path" "${url[@]}")
     if [ "$status_code" != "200" ] && [[ "${url[0]}" =~ .*github.com.*releases.*latest.* ]]; then
       url[0]="${url[0]//releases\/latest\/download/releases/download/$(get -s -n "" "$(echo "${url[0]}" | cut -d '/' -f '1-5')/releases" | grep -Eo -m 1 "([0-9]+\.[0-9]+\.[0-9]+)/$(echo "${url[0]}" | sed -e "s/.*\///")" | cut -d '/' -f 1)}"
       status_code=$(get -v -e "$tool_path" "${url[0]}")
     fi
+    if [ "$status_code" = "200" ]; then
+      sudo cp -a "$tool_path" "$cache_path"
+    elif [ -f "$tool_path.bak" ]; then
+      sudo mv "$tool_path.bak" "$tool_path"
+    fi
+    sudo rm -f "$tool_path.bak"
+  fi
   if [ "$status_code" = "200" ]; then
     add_tools_helper "$tool"
     tool_version=$(get_tool_version "$tool" "$ver_param")
@@ -193,8 +204,6 @@ add_tool() {
   else
     if [ "$tool" = "composer" ]; then
       export fail_fast=true
-    elif [ -e /tmp/"$tool" ]; then
-      sudo cp -a /tmp/"$tool" "$tool_path"
     fi
     if [ "$status_code" = "404" ]; then
       add_log "$cross" "$tool" "Failed to download $tool from ${url[*]}"