[vcpkg] Download vcpkg.exe rather than building it in bootstrap on Windows. (#15474)

This reduces bootstrap cost for Windows customers, resolving the issue initially submitted as #12502 .

The `toolsrc` tree was extracted to https://github.com/microsoft/vcpkg-tool. `bootstrap.sh` was changed to download the right source tarball, extract, and build it. This was chosen over the previous attempt, a submodule, over concerns of accidentally destroying people's local modifications.

1 files changed, 0 insertions, 52 deletions

diff --git a/scripts/cleanEnvironmentHelper.ps1 b/scripts/cleanEnvironmentHelper.ps1
deleted file mode 100644
index fa5fe869d..000000000
--- a/scripts/cleanEnvironmentHelper.ps1
+++ /dev/null
@@ -1,52 +0,0 @@
-# Capture environment variables for the System and User. Also add some special/built-in variables.
-# These will be used to synthesize a clean environment
-$specialEnvironmentMap = @{ "SystemDrive"=$env:SystemDrive; "SystemRoot"=$env:SystemRoot; "UserProfile"=$env:UserProfile; "TMP"=$env:TMP } # These are built-in and not set in the registry
-$machineEnvironmentMap = [Environment]::GetEnvironmentVariables('Machine') # HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment
-$userEnvironmentMap = [Environment]::GetEnvironmentVariables('User') # HKEY_CURRENT_USER\Environment
-
-# Identify the keySet of environment variable names
-$nameSet = ($specialEnvironmentMap.Keys + $machineEnvironmentMap.Keys + $userEnvironmentMap.Keys) | Sort-Object | Select-Object -Unique
-
-# Any environment variable in the $nameSet should be restored to its original value
-foreach ($name in $nameSet)
-{
-    if ($specialEnvironmentMap.ContainsKey($name))
-    {
-        [Environment]::SetEnvironmentVariable($name, $specialEnvironmentMap[$name], 'Process')
-        continue;
-    }
-
-    # PATH needs to be concatenated as it has values in both machine and user environment. Any other values should be set.
-    if ($name -eq 'path')
-    {
-        $pathValuePartial = @()
-        # Machine values before user values
-        $pathValuePartial += $machineEnvironmentMap[$name] -split ';'
-        $pathValuePartial += $userEnvironmentMap[$name] -split ';'
-        $pathValue = $pathValuePartial -join ';'
-        [Environment]::SetEnvironmentVariable($name, $pathValue, 'Process')
-        continue;
-    }
-
-    if ($userEnvironmentMap.ContainsKey($name))
-    {
-        [Environment]::SetEnvironmentVariable($name, $userEnvironmentMap[$name], 'Process')
-        continue;
-    }
-
-    if ($machineEnvironmentMap.ContainsKey($name))
-    {
-        [Environment]::SetEnvironmentVariable($name, $machineEnvironmentMap[$name], 'Process')
-        continue;
-    }
-
-    throw "Unreachable: Unknown variable $name"
-}
-
-# Any environment variable NOT in the $nameSet should be removed
-$processEnvironmentMap = [Environment]::GetEnvironmentVariables('Process')
-$variablesForRemoval = $processEnvironmentMap.Keys | Where-Object {$nameSet -notcontains $_}
-foreach ($name in $variablesForRemoval)
-{
-    [Environment]::SetEnvironmentVariable($name, $null, 'Process')
-}