essentials/dotfiles/emacs.d/elisp/package.el

(require 'cl)

(defvar my-packages '(ag
                      ;; Completion Frameworks
                      company
                      company-irony
                      company-emacs-eclim
                      jedi-core

                      ;; We don't need the `jedi` package
                      ;; since we are using company. If we
                      ;; include both we get an annoying
                      ;; *Python Completions* buffer that
                      ;; isn't useful to us.
                      company-jedi

                      eclim
                      irony
		      ivy
                      counsel
                      swiper

		      ;; LSP is compatible with company and the lsp-ui gives a
		      ;; vscode-like experience.
		      lsp-mode
		      lsp-ui
		      lsp-python-ms
		      ;;;;;;;;;;;;;;;;;;;;;;;;

		      cmake-ide
		      cmake-mode
		      clang-format+

                      ;;;;;;;;;;;;;;;;;;;;;;;;

                      ;; Programming modes
                      feature-mode
                      gitignore-mode
                      gradle-mode
                      magit
                      markdown-mode
                      meson-mode
                      nasm-mode
                      paredit
                      protobuf-mode
                      elpy
                      yaml-mode
		      slime

		      ;; Rails
		      rinari

		      ;; RVM support
		      rvm
                      ;;;;;;;;;;;;;;;;;;;;

		      ;; Test helpers
		      python-pytest

                      ;; Cleanup
                      ws-butler
                      ;;;;;;;;;;

                      ;; Shell helpers
                      exec-path-from-shell
                      ;;;;;;;;;;;;;;;;;;;;

		      ;; Keeps things indented even when you don't want it to
		      aggressive-indent
                      ;;;;;;;;;;;;;;;;;;

                      ;; UI
                      fill-column-indicator
                      golden-ratio
                      linum-relative
                      powerline
                      rainbow-delimiters
                      wrap-region
                      expand-region
                      wrap-region
                      material-theme
		      oceanic-theme
		      arjen-grey-theme
                      ;;;;;

                      ;; Project Interaction/Search/Syntax
                      flycheck
                      flycheck-pos-tip
		      flycheck-rtags
		      flx
                      smex
                      projectile
		      counsel-gtags
		      rtags
		      company-rtags

		      ;; Environments
		      pyenv-mode

		      ;; Python specific stuff
		      py-autopep8

		      ;;General
		      use-package

                      ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

		      )
  "Packages to make sure are installed")

(defun my-packages-installed-p ()
  (loop for p in my-packages
     when (not (package-installed-p p)) do (return nil)
     finally (return t)))

(unless (my-packages-installed-p)
  ;; check for new packages (package versions)
  (package-refresh-contents)
  ;; install the missing packages
  (dolist (p my-packages)
    (when (not (package-installed-p p))
      (package-install p))))