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Get rid of tabs!

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After a few Gerrit changesets showed tabs, I realized that I should
have Emacs remove tabs along with trailing whitespace.
This commit is contained in:
Howard Abrams 2022-08-02 11:13:48 -07:00
parent 537aa04aff
commit 6d7b9facd1
1 changed files with 38 additions and 26 deletions
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ha-config.org
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@ -241,21 +241,32 @@ For this, I use the =request= package, which is /asynchronous/
** Initial Settings and UI
Let's turn off the menu and other settings:
#+begin_src emacs-lisp
(when (display-graphic-p)
(when (display-graphic-p)
(tool-bar-mode -1)
(scroll-bar-mode -1)
(horizontal-scroll-bar-mode -1)
(setq visible-bell 1))
#+end_src
I dislike forgetting to trim trailing white-space:
#+begin_src emacs-lisp
(add-hook 'before-save-hook 'delete-trailing-whitespace)
#+end_src
I like being able to enable local variables in =.dir-local.el= files:
#+begin_src emacs-lisp
(setq enable-local-variables t)
(setq enable-local-variables t)
#+end_src
** Changes on Save
Always spaces and never tabs. Note that we use =setq-default= since [[elisp:(describe-variable 'indent-tabs-mode)][indent-tabs-mode]] is a /buffer-local/ variable, meaning that if we set it with =setq=, it will only be set in /that buffer file/. We want this globally the default:
#+begin_src emacs-lisp
(setq-default indent-tabs-mode nil)
#+end_src
When I push changes to my files to Gerrit and other code review, I don’t want trailing spaces or any tabs to appear, so let’s fix all files when I [[elisp:(describe-variable 'before-save-hook)][save them]]:
#+begin_src emacs-lisp
(defun ha-cleanup-buffer-file ()
"Cleanup a file, often done before a file save."
(interactive)
(untabify (point-min) (point-max)
(delete-trailing-whitespace)))
(add-hook 'before-save-hook #'ha-cleanup-buffer-file)
#+end_src
** Completing Read User Interface
After using Ivy, I am going the route of a =completing-read= interface that extends the original Emacs API, as opposed to implementing backend-engines or complete replacements.
@ -1437,6 +1448,7 @@ I also need to append the following to my [[file:~/.gitconfig][~/.gitconfig]] fi
plus-emph-style = syntax "#009000"
plus-empty-line-marker-style = normal "#006800"
#+end_src
#+end_src
*** Time Machine
The [[https://github.com/emacsmirror/git-timemachine][git-timemachine]] project visually shows how a code file changes with each iteration:
#+begin_src emacs-lisp