fix(core): fix Windows install script && update faq

docs/faq.md

@@ -13,6 +13,7 @@ and usage.
 - [Installation](#installation)
   - [Where is my old vim configuration?](#where-is-my-old-vim-configuration)
   - [How to uninstall SpaceVim?](#how-to-uninstall-spacevim)
+  - [How to perform manual installation?](#how-to-perform-manual-installation)
 - [Configuration](#configuration)
   - [Can I try SpaceVim without overwriting my vimrc?](#can-i-try-spacevim-without-overwriting-my-vimrc)
   - [Why use toml as the default configuration file format?](#why-use-toml-as-the-default-configuration-file-format)
@@ -42,6 +43,16 @@ and if you uninstalll SpaceVim, your vimrc will come back. you can run:
 curl -sLf https://spacevim.org/install.sh | bash -s -- --uninstall
 ```
 
+### How to perform manual installation?
+
+Clone the SpaceVim Github repository to `~/.SpaceVim` and link Vim and Neovim user folder `~/.SpaceVim`. Delete `~/.vimrc`.
+
+```
+git clone https://github.com/SpaceVim/SpaceVim.git ~/.SpaceVim
+ln -s ~/.SpaceVim ~/.vim
+ln -s ~/.SpaceVim ~/.config/nvim
+```
+
 ## Configuration
 
 ### Can I try SpaceVim without overwriting my vimrc?

docs/install.cmd

@@ -1,5 +1,14 @@
 @PowerShell -ExecutionPolicy Bypass -Command Invoke-Expression $('$args=@(^&{$args} %*);'+[String]::Join(';',(Get-Content '%~f0') -notmatch '^^@PowerShell.*EOF$')) & goto :EOF
 
+Push-Location ~
+
+$app_name = "SpaceVim"
+$repo_url = "https://github.com/SpaceVim/SpaceVim.git"
+$repo_name = "SpaceVim"
+$repo_path = "$HOME\.SpaceVim"
+$version= "2.0.0-dev"
+
+echo ""
 echo "        /######                                     /##    /##/##             "
 echo "       /##__  ##                                   | ##   | #|__/             "
 echo "      | ##  \__/ /######  /######  /####### /######| ##   | ##/##/######/#### "
@@ -11,14 +20,7 @@ echo "       \______/| ##____/ \_______/\_______/\_______/   \_/   |__|__/ |__/
 echo "               | ##                                                           "
 echo "               | ##                                                           "
 echo "               |__/                                                           "
-echo "                      version : 2.0.0-dev       by : spacevim.org             "
+echo "                      version : $version        by : spacevim.org             "
-
-Push-Location ~
-
-$app_name    = "SpaceVim"
-$repo_url    = "https://github.com/SpaceVim/SpaceVim.git"
-$repo_name   = "SpaceVim"
-$repo_path   = "$HOME\.SpaceVim"
 
 Function Pause ($Message = "Press any key to continue . . . ") {
     if ((Test-Path variable:psISE) -and $psISE) {
@@ -31,6 +33,7 @@ Function Pause ($Message = "Press any key to continue . . . ") {
     }
 }
 
+echo ""
 echo "==> Starting Testing Procedure..."
 echo ""
 sleep 1
@@ -51,58 +54,87 @@ if (Get-Command "git" -ErrorAction SilentlyContinue) {
 
 echo ""
 
-echo "==> Testing vim"
+echo "==> Testing Vim"
-if (Get-Command "gvim" -ErrorAction SilentlyContinue) {
+if (Get-Command "vim" -ErrorAction SilentlyContinue) {
     echo ($(vim --version) -split '\n')[0]
     echo "[OK] Test successfully. Moving to next..."
     sleep 1
 } else {
-    echo "[WARNING] Unable to find 'gvim.exe' in your PATH. But installation still can continue..."
     echo ""
-    echo "[WARNING] Please install gvim later or  make your PATH correctly set! "
+    echo "[ERROR] Unable to find 'vim.exe' in your PATH"
+    echo "Please install vim later or make your PATH correctly set!"
+    echo ">>> Ready to Exit......"
     Pause
+    exit
 }
 
+echo ""
 echo "<== Testing Procedure Completed. Moving to next..."
+echo ""
 sleep 1
-echo ""
-echo ""
 
-if (!(Test-Path "$HOME\.SpaceVim")) {
+if (!(Test-Path $HOME\.SpaceVim)) {
     echo "==> Trying to clone $app_name"
     git clone $repo_url $repo_path
+    echo "<== $app_name cloned"
 } else {
     echo "==> Trying to update $app_name"
     Push-Location $repo_path
     git pull origin master
+    Pop-Location
+    echo "<== $app_name updated"
+}
+
+if (Test-Path $HOME/_vimrc) {
+    mv $HOME/_vimrc $HOME\vimfiles_back
+    echo "Backing up _vimrc"
 }
 
 echo ""
-
+echo "==> Trying to install $app_name for Vim"
-if (!(Test-Path "$HOME\vimfiles")) {
+if (!(Test-Path $HOME\vimfiles)) {
+  cmd /c mklink /J $HOME\vimfiles $repo_path
+  echo "[OK] vimfiles created"
+} else {
+    echo "Backing up vimfiles"
+    if (Test-Path $HOME\vimfiles_back) {
+        cmd /c rmdir /s /q $HOME\vimfiles_back
+    }
+    mv $HOME\vimfiles $HOME\vimfiles_back
     cmd /c mklink /J $HOME\vimfiles $repo_path
-} else {
+    echo "[OK] vimfiles updated"
-    echo "[OK] vimfiles already exists"
+    sleep 1
-	sleep 1
 }
+echo "<== $app_name for Vim installed"
 echo ""
 
-if (!(Test-Path "$HOME\AppData\Local\nvim")) {
+if (Get-Command "nvim" -ErrorAction SilentlyContinue) {
-  cmd /c mklink /J "$HOME\AppData\Local\nvim" $repo_path
+  echo "==> Trying to install $app_name for Neovim"
+  if (!(Test-Path $HOME\AppData\Local\nvim)) {
+    cmd /c mklink /J "$HOME\AppData\Local\nvim" $repo_path
+    echo "[OK] nvim created"
 } else {
-    echo "[OK] $HOME\AppData\Local\nvim already exists"
+    if (Test-Path $HOME\AppData\Local\nvim_back) {
-	sleep 1
+      cmd /c rmdir /s /q $HOME\AppData\Local\nvim_back
+    }
+    cmd /c rmdir /s /q  $HOME\vimfiles_back
+    mv $HOME\AppData\Local\nvim $HOME\AppData\Local\nvim_back
+    cmd /c mklink /J $HOME\AppData\Local\nvim $repo_path
+    echo "[OK] nvim updated"
+    sleep 1
 }
+  echo "<== $app_name for Neovim installed"
+}
+
+Pop-Location
 
 echo ""
 echo "Almost done!"
 echo "=============================================================================="
-echo "==        Open GVim and it will install the plugins automatically           =="
+echo "==    Open Vim or Neovim and it will install the plugins automatically      =="
 echo "=============================================================================="
 echo ""
 echo "That's it. Thanks for installing $app_name. Enjoy!"
 echo ""
-
 Pause
 
-# vim:set ft=powershell nowrap: 

docs/quick-start-guide.md

@@ -11,10 +11,11 @@ configure, and use SpaceVim. It also lists a series of resources for learning Sp
 If you've never heard of SpaceVim, this is the best place to start.
 It will give you a good idea of what SpaceVim is like.
 
+
 <!-- vim-markdown-toc GFM -->
 
 - [Installation](#installation)
-  - [Linux and macOS](#linux-and-macos)
+- [Linux and macOS](#linux-and-macos)
   - [Windows](#windows)
 - [Run in docker](#run-in-docker)
 - [Configuration](#configuration)
@@ -32,7 +33,7 @@ which are needed for downloading plugins and fonts.
 
 If you are using a terminal emulator, you will need to set the font in the terminal configuration.
 
-### Linux and macOS
+## Linux and macOS
 
 ```bash
 curl -sLf https://spacevim.org/install.sh | bash
@@ -66,7 +67,7 @@ and a C compiler (like `gcc`) to build the dll (see issue [#435](https://github.
 
 ### Windows
 
-The easiest way is to download [install.cmd](../install.cmd) and run it as administrator, or install SpaceVim manually.
+The easiest way is to download and run [install.cmd](../install.cmd) or install [SpaceVim manually](../faq.md#how-to-perform-manual-installation). The script installs or updates SpaceVim (if it exists) for Vim and Neovim.
 
 ## Run in docker