electron-4/installer.nsh

Var D_DRIVE_EXISTS
Var defaultInstallDir
!macro preInit

    StrCpy $D_DRIVE_EXISTS 0
    StrCpy $defaultInstallDir "$PROGRAMFILES\${APP_ID}"

    FindFirst $R0 $R1 "D:\*.*"
    ${If} $R0 != ""
        StrCpy $D_DRIVE_EXISTS 1
        StrCpy $defaultInstallDir "D:\ProgramFiles\${APP_ID}"
        FindClose $R0
    ${EndIf}

    ${If} $D_DRIVE_EXISTS == 0
    ${EndIf}


    SetRegView 64
    WriteRegExpandStr HKLM "${INSTALL_REGISTRY_KEY}" InstallLocation "$defaultInstallDir"
    WriteRegExpandStr HKCU "${INSTALL_REGISTRY_KEY}" InstallLocation "$defaultInstallDir"
    #writeUninstaller $INSTDIR\uninstaller.exe
    SetRegView 32
    WriteRegExpandStr HKLM "${INSTALL_REGISTRY_KEY}" InstallLocation "$defaultInstallDir"
    WriteRegExpandStr HKCU "${INSTALL_REGISTRY_KEY}" InstallLocation "$defaultInstallDir"
!macroend

!macro customUnInstall
    SetRegView 64
    DeleteRegKey HKLM "${INSTALL_REGISTRY_KEY}"
    DeleteRegKey HKCU "${INSTALL_REGISTRY_KEY}"
    SetRegView 32
    DeleteRegKey HKLM "${INSTALL_REGISTRY_KEY}"
    DeleteRegKey HKCU "${INSTALL_REGISTRY_KEY}"

    Delete "$APPDATA\${APP_ID}\*.*"
    RMDir /r "$APPDATA\${APP_ID}"
    Delete "$LOCALAPPDATA\${APP_ID}\*.*"
    RMDir /r "$LOCALAPPDATA\${APP_ID}"
!macroend