Efficient Multi-Project Hacking in Emacs

• I got a new keyboard!

Today I want to try and come up with a workflow for efficiently hacking in multiple projects at the same time in Emacs.

• Running project commands, both with project-compile and project(-async)-shell-command
• Finding files and directories in the project
• Searching across the project with grep/rg
• Looking at open project buffers with ibuffer (project-list-buffers)
• Possibly using direnv or dir-local configurations

… and more!

• No need for multiple tabs or frames
• Really easy to jump between projects, especially to specific files
• Easy to switch between buffers for the same project

(defun my/project-compilation-buffer-name-function (name-of-mode)
  (format "*compilation: %s*" (project-name (project-current))))

;; Customize compilation buffer names using the project name
(setq project-compilation-buffer-name-function #'my/project-compilation-buffer-name-function)

(defun my/project-switch-to-buffer (&optional all-buffers)
  (interactive "P")
  (if (or (not (project-current))
          all-buffers)
      (call-interactively #'switch-to-buffer)
    (call-interactively #'project-switch-to-buffer)))

;; Use our custom buffer switching function
(keymap-global-set "C-x b" #'my/project-switch-to-buffer)

;; Allow all keymap keys to be used when switching project
(setq project-switch-use-entire-map t)

To automatically index all projects under a folder path:

(project-remember-projects-under "~/Projects/Code" t)

Key Binding

c-x p C-b project-list-buffers C-x p ! project-shell-command C-x p & project-async-shell-command C-x p D project-dired C-x p F project-or-external-find-file C-x p G project-or-external-find-regexp C-x p b project-switch-to-buffer C-x p c project-compile C-x p d project-find-dir C-x p e project-eshell C-x p f project-find-file C-x p g project-find-regexp C-x p k project-kill-buffers C-x p o project-any-command C-x p p project-switch-project C-x p r project-query-replace-regexp C-x p s project-shell C-x p v project-vc-dir C-x p x project-execute-extended-command

• https://github.com/purplg/treebundel