mason.el is installer for LSP servers, DAP servers, linters and formatters, inspired by mason.nvim.

Package registry at mason-org/mason-registry.

• Run M-x mason-install RET to install packages.
• Run M-x mason-manager RET to open package manager.

mason.el will call external programs such as cargo and npm to install the packages, or tar and gzip to extract downloaded archives.

Call (mason-doctor) to see the requirements of each package type.

mason.el is available on MELPA, install it in your favorite way and call (mason-ensure) to setup the environment.

(use-package mason
  :ensure t
  :config
  (mason-ensure)
  ;; or
  :hook
  (after-init-hook . mason-ensure))

mason.el can be used to install packages programmatically:

(mason-ensure
 (lambda ()
   (ignore-errors (mason-install "basedpyright"))
   (ignore-errors (mason-install "jdtls"))
   (ignore-errors (mason-install "clangd"))))

This will install the missing packages.

mason-manager	Package info
mason-install	mason-log