;;; core-projects.el --- tools for getting around your project

;; I want Emacs to be aware of the projects. `projectile' provides tools for
;; digging through project files and exposing an API I can use to make other
;; plugins/features project-aware.

(defvar doom-project-hook nil
  "Hook run when a project is enabled. The name of the project's mode and its
state are passed in.")

(def-package! projectile :demand t
  :init
  (setq projectile-cache-file (concat doom-cache-dir "projectile.cache")
        projectile-enable-caching (not noninteractive)
        projectile-file-exists-remote-cache-expire nil
        projectile-globally-ignored-directories `(,doom-local-dir ".sync")
        projectile-globally-ignored-file-suffixes '(".elc" ".pyc" ".o")
        projectile-globally-ignored-files '(".DS_Store" "Icon
")
        projectile-indexing-method 'alien
        projectile-known-projects-file (concat doom-cache-dir "projectile.projects")
        projectile-require-project-root nil
        projectile-project-root-files
        '(".git" ".hg" ".svn" ".project" "package.json" "setup.py" "Gemfile"
          "build.gradle"))

  :config
  (projectile-mode +1)

  (setq projectile-other-file-alist
        (append '(("less" "css")
                  ("styl" "css")
                  ("sass" "css")
                  ("scss" "css")
                  ("css" "scss" "sass" "less" "styl")
                  ("jade" "html")
                  ("pug" "html")
                  ("html" "jade" "pug" "jsx" "tsx"))
                projectile-other-file-alist))

  ;; Projectile root-searching functions cause an endless loop on TRAMP
  ;; connections, so we disable them.
  (defun doom*projectile-locate-dominating-file (orig-fn &rest args)
    "Don't traverse the file system if a remote connection."
    (unless (file-remote-p default-directory)
      (apply orig-fn args)))
  (advice-add #'projectile-locate-dominating-file :around #'doom*projectile-locate-dominating-file)

  (defun doom*projectile-cache-current-file (orig-fun &rest args)
    "Don't cache ignored files."
    (unless (cl-some (lambda (path)
                       (string-prefix-p buffer-file-name
                                        (expand-file-name path)))
                     (projectile-ignored-directories))
      (apply orig-fun args)))
  (advice-add #'projectile-cache-current-file :around #'doom*projectile-cache-current-file))


;;
;; Library
;;

(defun doom-project-p (&optional strict-p)
  "Whether or not this buffer is currently in a project or not."
  (let ((projectile-require-project-root strict-p))
    (projectile-project-p)))

(defun doom-project-root (&optional strict-p)
  "Get the path to the root of your project."
  (let ((projectile-require-project-root strict-p))
    (ignore-errors (projectile-project-root))))

(defmacro doom-project-has! (files)
  "Checks if the project has the specified FILES, relative to the project root,
unless the path begins with ./ or ../, in which case it's relative to
`default-directory'. Recognizes (and ...) and/or (or ...) forms."
  (doom--resolve-paths files (doom-project-root)))


;;
;; Projects
;;

(defvar-local doom-project nil
  "A list of project mode symbols to enable. Used for .dir-locals.el.")

(defun doom|autoload-project-mode ()
  "Auto-enable projects listed in `doom-project', which is meant to be set from
.dir-locals.el files."
  (dolist (mode doom-project)
    (funcall mode)))
(add-hook 'after-change-major-mode-hook #'doom|autoload-project-mode)

(defmacro def-project-mode! (name &rest plist)
  "Define a project minor-mode named NAME, and declare where and how it is
activated. Project modes allow for project-specific settings, keymaps, hooks &
custom configuration without having to litter the project with .dir-locals.el
files.

This creates NAME-hook and NAME-map as well.

A project can be enabled through .dir-locals.el however, if `doom-project' is set
to the name of the project mode(s) to enable.

PLIST should contain any or all of these properties, which each are checked to
see if NAME should be activated.

  :modes MODES -- if buffers are derived from MODES (one or a list of symbols).

  :files FILES -- if project contains FILES; takes a solitary string or a form
    comprised of (and ...) and/or (or ...) forms. Each path is relative to the
    project root, however, if prefixed with a '.' or '..', it is relative to the
    current buffer.

  :match REGEXP -- if file name matches REGEXP

  :when PREDICATE -- if PREDICATE returns true (can be a form or the symbol of a
    function)

  :init FORM -- FORM will be run the first time this project mode is enabled."
  (declare (indent 1))
  (let ((modes (plist-get plist :modes))
        (files (plist-get plist :files))
        (when  (plist-get plist :when))
        (match (plist-get plist :match))
        (init-form (plist-get plist :init))
        (keymap-sym (intern (format "%s-map" name))))
    `(progn
       (defvar ,keymap-sym (make-sparse-keymap)
         ,(concat "Keymap for `" (symbol-name name) "'"))
       (define-minor-mode ,name
         "A project minor mode."
         :init-value nil
         :keymap ,keymap-sym)
       ,(when (or modes match files when)
          `(associate! ,name
             :modes ,modes
             :match ,match
             :files ,files
             :when ,when))
       (add-hook! ,name
         (run-hook-with-args 'doom-project-hook ',name))
       ,(when init-form
          `(add-transient-hook! ',(intern-soft (format "%s-hook" name))
             ,init-form)))))

(provide 'core-projects)
;;; core-projects.el ends here