From 79fbaac739ee3401245d90fe0f4c2ce7de155e27 Mon Sep 17 00:00:00 2001
From: Taylor Bockman <tbockman@xchg.sh>
Date: Sat, 22 Aug 2020 21:28:33 -0700
Subject: [PATCH] Make python play nice with emacs

---
 dotfiles/emacs.d/init.el    | 64 ++++++++++++++++++++++++++++++++++++++++++---
 dotfiles/emacs.d/package.el |  7 +++--
 2 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/dotfiles/emacs.d/init.el b/dotfiles/emacs.d/init.el
index 1976eb5..3903f38 100644
--- a/dotfiles/emacs.d/init.el
+++ b/dotfiles/emacs.d/init.el
@@ -70,6 +70,13 @@ There are two things you can do about this warning:
 (set-buffer-file-coding-system 'unix)
 
 ;;--------------------------------------------------------------------------------------
+;; Populate emacs path to $PATH when on *nix or OS X
+;;--------------------------------------------------------------------------------------
+
+(when (memq window-system '(mac ns x))
+  (exec-path-from-shell-initialize))
+
+;;--------------------------------------------------------------------------------------
 ;; Enable auto-refresh to keep buffers up to date when git or another program
 ;; modifies them
 ;;--------------------------------------------------------------------------------------
@@ -184,19 +191,70 @@ There are two things you can do about this warning:
 ;; Enable semantic for language-aware editing commands
 (setq semantic-mode 't)
 
+
+;; Enable company mode
+(add-hook 'after-init-hook 'global-company-mode)
+
+;; Globally enable flycheck
+(add-hook 'after-init-hook #'global-flycheck-mode)
+
+;;;;; PYTHON ;;;;;;;;;;;;;;;;;;
+;;
+;; NOTES:
+;;
+;;   - For each project you will need to install flake8/autopep8 into the virtualenv
+;;   - For each project you will need to install jedi into the virtualenv
+;;   - To set your pyenv use M-x pyenv-mode and select your local virtualenv
+;;
+;;
+
+;; thx rakan.me
+(defun pyenv-activate-current-project ()
+  "Automatically activates pyenv version if .python-version file exists."
+  (interactive)
+  (f-traverse-upwards
+   (lambda (path)
+     (message path)
+     (let ((pyenv-version-path (f-expand ".python-version" path)))
+       (if (f-exists? pyenv-version-path)
+	   (let ((pyenv-current-version (s-trim (f-read-text pyenv-version-path 'utf-8))))
+	     (pyenv-mode-set pyenv-current-version)
+	     (message (concat "Setting virtualenv to " pyenv-current-version))))))))
+
 ;; For Python enable Elpy.
 (use-package elpy
-  :ensure t
-  :init (elpy-enable))
+    :ensure t
+    :init (elpy-enable))
+
+(setq elpy-rpc-backend "jedi")
 
 ;; Enable pyenv integration.
 (use-package pyenv-mode
-  :config
+    :config
   (pyenv-mode))
 
 ;; Disable elpy default virtualenv (use the pyenv one)
 (setq elpy-rpc-virtualenv-path 'current)
 
+;; Enable autopep8
+
+(require 'py-autopep8)
+
+(add-hook 'elpy-mode-hook 'py-autopep8-enable-on-save)
+
+;; Enable flake8 - requires flake8 in your path so use pyenv/global pip install
+(add-hook 'python-mode-hook '(lambda ()
+			      (setq flycheck-python-flake8-executable "flake8")
+			      (flycheck-select-checker 'python-flake8)
+			      (flycheck-mode t)))
+
+;; Activate pyenv automatically if a .python-version is supplied
+(add-hook 'python-mode-hook 'pyenv-activate-current-project)
+
+;; Add company-jedi hook to python mode
+(add-hook 'python-mode-hook (lambda ()
+			      (add-to-list 'company-backends 'company-jedi)))
+
 ;;--------------------------------------------------------------------------------------
 ;; Save hooks
 ;;--------------------------------------------------------------------------------------
diff --git a/dotfiles/emacs.d/package.el b/dotfiles/emacs.d/package.el
index 35aecf0..0db17c4 100644
--- a/dotfiles/emacs.d/package.el
+++ b/dotfiles/emacs.d/package.el
@@ -82,6 +82,9 @@
 		      ;; Environments
 		      pyenv-mode
 
+		      ;; Python specific stuff
+		      py-autopep8
+
 		      ;;General
 		      use-package
 
@@ -92,8 +95,8 @@
 
 (defun my-packages-installed-p ()
   (loop for p in my-packages
-        when (not (package-installed-p p)) do (return nil)
-        finally (return t)))
+     when (not (package-installed-p p)) do (return nil)
+     finally (return t)))
 
 (unless (my-packages-installed-p)
   ;; check for new packages (package versions)