sets environment variables for Machine and User

set_environment.ps1

#
# Initializes Environment variables both globally and for current user session
#
# for login sessions run via 
#
#     powershell --file ./set_environment.ps1
#

function set_env ($name, $text, $scope="User") { 
    (getRegistryKey $scope).SetValue($name, $text, [Microsoft.Win32.RegistryValueKind]::ExpandString)
}

function del_env ($name, $scope="User") { 
    (getRegistryKey $scope).DeleteValue($name)
}

function get_env ($name, $scope="User") {
    return (getRegistryKey $scope).GetValue(
        $name, $null, 
        [Microsoft.Win32.RegistryValueOptions]::DoNotExpandEnvironmentNames
    )
}

function getRegistryKey($scope="User") {
    switch ($scope.ToLower()) {
        user {  return [Microsoft.Win32.RegistryKey]::OpenBaseKey( 
                    [Microsoft.Win32.RegistryHive]::CurrentUser,  
                    [Microsoft.Win32.RegistryView]::Default
                ).OpenSubKey('Environment', $true)
        }
        machine { return [Microsoft.Win32.RegistryKey]::OpenBaseKey( 
                    [Microsoft.Win32.RegistryHive]::LocalMachine, 
                    [Microsoft.Win32.RegistryView]::Default 
                  ).OpenSubKey('SYSTEM\CurrentControlSet\Control\Session Manager\Environment', $true)
        }
        default { throw 'getRegistryKey: Scope parameter should be either "Machine" or "User"' }
    }
}


function initMachineEnvironment() {
    set_env 00_path_windows       "%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SystemRoot%\System32\WindowsPowerShell\v1.0" Machine
    set_env 01_path_my_packages   "%ProgramData%\scoop\shims;%ProgramData%\chocolatey\bin" Machine
    set_env 99_path_backup_values "%ProgramFiles(x86)%\NVIDIA Corporation\PhysX\Common" Machine
    set_env ChocolateyInstall     "%ProgramData%\chocolatey" Machine
    set_env JAVA_HOME             "%ProgramFiles%\Java\jdk1.8.0_121" Machine
    set_env Path                  "%00_path_windows%;%01_path_my_packages%;%JAVA_HOME%;%ProgramFiles%\Docker\Docker\Resources\bin" Machine
    set_env PSModulePath          "%ProgramFiles%\WindowsPowerShell\Modules;%SystemRoot%\system32\WindowsPowerShell\v1.0\Modules" Machine
    set_env SCOOP_GLOBAL          "%ProgramData%\scoop" Machine
}


function initUserEnvironment() {
    [Environment]::SetEnvironmentVariable("OneDrive",      "e:\OneDrive",         "User")
    [Environment]::SetEnvironmentVariable("OneDrive_Home", "e:\OneDrive",         "User")
    [Environment]::SetEnvironmentVariable("Dropbox_Home",  "e:\Dropbox",          "User")
    [Environment]::SetEnvironmentVariable("MSYS",          "c:\tools\msys64",     "User")
    [Environment]::SetEnvironmentVariable("Cmder_Root",    "c:\tools\cmder",      "User")
    [Environment]::SetEnvironmentVariable("Git",           "c:\tools\git-sdk-64", "User")   #  "%00_MSYS%\usr\bin" User

    # set_env 00_SCOOP	     "%Userprofile%\scoop" User
    # set_env 01_GIT	     "c:\tools\git-sdk-64" User  #  "%00_MSYS%\usr\bin" User
    set_env SCOOP	         "%Userprofile%\scoop" User
    set_env 01_path_cmder    "%Cmder_Root%;%Cmder_Root%\bin;%Cmder_Root%\vendor\conemu-maximus5;%Cmder_Root%\vendor\conemu-maximus5\ConEmu"  User
    set_env 01_path_git      "%Git%;%Git%\usr\bin" User    
    set_env 02_path_perl     "%Scoop%\apps\perl\current\c\bin;%Scoop%\apps\perl\current\perl\bin;%Scoop%\apps\perl\current\perl\site\bin" User
    set_env 03_path_node     "%Scoop%\apps\nvm\current\nodejs;%LocalAppData%\Yarn\config\global\node_modules\.bin" User
    set_env 04_path_msys     "%ChocolateyInstall%\lib\msys2;%MSYS%;%MSYS%\usr\bin" User
    set_env 99_path_other    "%AppData%\Boxstarter;%USERPROFILE%\AppData\Local\Microsoft\WindowsApps" User
    set_env Choco            "%ChocolateyInstall%" User
    # set_env CMDER_ROOT       "c:\tools\cmder" User
    set_env ConEmuDir        "%Cmder_Root%\vendor\conemu-maximus5" User
    # set_env DROPBOX_HOME     "E:\Dropbox" User
    # set_env GIT              "%01_GIT%" User
    set_env Git_Install_Root "%Git%"  User     # set_env GIT_INSTALL_ROOT__  "%00_SCOOP%\apps\git-with-openssh\current"
    # set_env GIT_SSH__        "%GIT_INSTALL_ROOT%\usr\bin\ssh.exe" User
    # set_env MSYS             "%00_MSYS%" User
    set_env NVM_HOME         "%Scoop%\apps\nvm\current" User
    set_env NVM_SYMLINK      "%Scoop%\apps\nvm\current\nodejs" User
    set_env ONEDRIVE_HOME    "%OneDrive%" User
    set_env Path             "%Scoop%\shims;%Userprofile%\bin;%01_path_cmder%;%01_path_git%;%02_path_perl%;%03_path_node%;%04_path_msys%;%OneDrive%\01_portable_apps;%99_path_other%" User
    set_env PHP_INI_SCAN_DIR "%laragon%\bin\php\current\ext" User
    set_env PSModulePath     "%UserProfile%\Documents\WindowsPowerShell\Modules;%Appdata%\Boxstarter" User
    # set_env SCOOP            "%Userprofile%\scoop" User
    set_env UBUNTU           "%localappdata%\Lxss\rootfs" User
}


# init
initMachineEnvironment
initUserEnvironment

$env:Path -split ";"