wsl下载ubuntu

# 查看可以下载的镜像
wsl --list --online
# 下载ubuntu20.04
wsl --install Ubuntu-20.04

迁移到D盘

在D盘创建一个目录用来存放新的WSL，比如D:\WSL\Ubuntu-20.04

# 1. 导出它的备份（比如命名为Ubuntu.tar)
wsl --export Ubuntu-20.04 D:\WSL\Ubuntu-20.04.tar
# 2. 注销原来的
wsl --unregister Ubuntu-20.04
# 3. 将备份文件恢复到D:\WSL\Ubuntu-20.04中去
wsl --import Ubuntu-20.04 D:\WSL\Ubuntu-20.04 D:\WSL\Ubuntu-20.04.tar
# 这时候可以把Ubuntu-20.04.tar删除了

如果这时候启动WSL，发现好像已经恢复正常了，但是用户变成了root。用以下命令恢复：

1	Ubuntu2004 config --default-user username

安装最新版emacs

# Optional: 卸载snapd
sudo apt-get purge snapd

# 下载emacs源码
wget https://mirrors.ustc.edu.cn/gnu/emacs/emacs-30.2.tar.xz
cd emacs
sudo apt install zlib1g-dev libgccjit-9-dev pkg-config libgnutls28-dev
./configure --without-x --without-ns --without-pgtk --with-native-compilation --with-threads --prefix=/usr/local
make -j$(nproc)
sudo make install

--without-x emacs-nox，不使用 X11（Xorg），只能用 emacs -nw（终端）
--without-ns 禁用 macOS 的 Cocoa / NS 窗口系统，只是防止 configure 自动探测到 macOS GUI
--without-pgtk 禁用 Pure GTK（Wayland 下的新 GUI 后端）
--with-native-compilation 启用 native-comp（.eln）将Elisp 编译成机器码
--with-threads启用多线程支持
--prefix=/usr/local安装到 /usr/local

treesitter问题
参考下面这个修改，主要是ABI版本不匹配的问题，降低版本即可。

(use-package tree-sitter
  :ensure t
  ;; :when (and (fboundp 'treesit-available-p)
  ;;            (treesit-available-p))
  :config
  (setq treesit-font-lock-level 4)
  ;;:init
  (setq treesit-language-source-alist
        '((bash       . ("https://github.com/tree-sitter/tree-sitter-bash" "v0.20.0"))
          (c          . ("https://github.com/tree-sitter/tree-sitter-c" "v0.21.3"))
          (cpp        . ("https://github.com/tree-sitter/tree-sitter-cpp"))
          (python     . ("https://github.com/tree-sitter/tree-sitter-python" "v0.20.4"))
          (rust       . ("https://github.com/tree-sitter/tree-sitter-rust" "v0.20.3"))
          (toml       . ("https://github.com/tree-sitter/tree-sitter-toml"))
          ;; (elisp      . ("https://github.com/Wilfred/tree-sitter-elisp"))
          (cmake      . ("https://github.com/uyha/tree-sitter-cmake"))
          (dockerfile . ("https://github.com/camdencheek/tree-sitter-dockerfile"))
          (make       . ("https://github.com/alemuller/tree-sitter-make"))
          (yaml       . ("https://github.com/ikatyang/tree-sitter-yaml"))
          (json       . ("https://github.com/tree-sitter/tree-sitter-json"))          
          ))

  ;;没有内置<languate>-mode的需要添加
  (add-to-list 'auto-mode-alist '("\\.c\\.[^/]*\\'" . c-ts-mode))
  (add-to-list 'auto-mode-alist '("\\.include\\.[^/]*\\'" . c-ts-mode))
  (add-to-list 'auto-mode-alist '("\\.y[a]?ml\\'" . yaml-ts-mode))
  (add-to-list 'auto-mode-alist '("\\(?:Dockerfile\\(?:\\..*\\)?\\|\\.[Dd]ockerfile\\)\\'" . dockerfile-ts-mode))
  (add-to-list 'auto-mode-alist '("\\.rs\\'" . rust-ts-mode))
  )

;; 安装 tree-sitter 语法解析器（仅 Emacs 29+）
;; (run-with-idle-timer 3 nil  ; 启动后3秒空闲时执行
;;                      (lambda ()
;;                        (dolist (lang '(bash c cpp python rust toml cmake dockerfile make yaml json))
;;                          (unless (treesit-language-available-p lang)
;;                            (treesit-install-language-grammar lang)))))

;; 优先使用 Tree-sitter mode
(setq major-mode-remap-alist
      '((bash-mode        . bash-ts-mode)
        (sh-mode          . bash-ts-mode)
        (c-mode           . c-ts-mode)
        (c++-mode         . c++-ts-mode)
        (python-mode      . python-ts-mode)
        ;;(rust-mode        . rust-ts-mode)
        (conf-toml-mode   . toml-ts-mode)
        (cmake-mode       . cmake-ts-mode)
        ;;(dockerfile-mode  . dockerfile-ts-mode)
        (json-mode        . json-ts-mode)
        (java-mode        . java-ts-mode)
        ;;(yaml-mode        . yaml-ts-mode)
        (makefile-mode    . makefile-ts-mode)
	))

另外通过apt下载的clangd版本比较老，可能不支持某些配置项，参考下面修改

(use-package eglot
  :ensure t
  :defer 1
  :config
  (setq eglot-server-programs
        '(((c++-mode c-mode c++-ts-mode c-ts-mode)     . ("clangd"
                                                          ;;"-j=4"
                                                          ;; "--enable-config"
                                                          "--background-index"
                                                          ;; "--background-index-priority=low"
                                                          "--clang-tidy"
                                                          "--completion-style=detailed"
                                                          "--header-insertion=never"
                                                          "--all-scopes-completion"
                                                          "--pretty"
                                                          "--fallback-style=none"
                                                          ;;"--query-driver=aarch64-linux-gnu-*"
                                                          ;;"--query-driver=gcc,g++"
                                                          ))
          ((rust-mode rust-ts-mode)                    . ("rust-analyzer" :initializationOptions
                                                          (:cargo (:buildScripts (:enable t))
                                                                  :procMacro (:enable t))))

          ((python-mode python-ts-mode)                . ("pyright-langserver" "--stdio"))

          ;;((bash-mode bash-ts-mode sh-mode sh-ts-mode) . ("bash-language-server" "start"))
          ((toml-mode toml-ts-mode)                    . ("taplo" "lsp" "stdio"))
          ((yaml-mode yaml-ts-mode)                    . ("yaml-language-server" "--stdio"))
          ((markdown-mode markdown-ts-mode)            . ("marksman"))

          ))

  ;; 关闭lsp自动格式化
  (setq eglot-ignored-server-capabilities '(:documentOnTypeFormattingProvider))
  )