Rewrite core-cli

Highlights:
- 'doom purge' now purges builds, elpa packages, and repos by default.
  Regrafting repos is now opt-in with the -g/--regraft switches.
  Negation flags have been added for elpa/repos: -e/--no-elpa and
  -r/--no-repos.
- Removed 'doom rebuild' (it is now just 'doom build' or 'doom b').
- Removed 'doom build's -f flag, this is now the default. Added the -r
  flag instead, which only builds packages that need rebuilding.
- 'doom update' now updates packages synchronously, but produces more
  informative output about the updating process.
- Straight can now prompt in batch mode, which resolves a lot of issues
  with 'doom update' (and 'doom upgrade') freezing indefinitely or
  throwing repo branch errors.
- 'bin/doom's switches are now positional. Switches aimed at `bin/doom`
  must precede any subcommands. e.g.
    Do: 'doom -yd upgrade'
    Don't do: 'doom upgrade -yd'
- Moved 'doom doctor' from bin/doom-doctor to core/cli/doctor, and
  integrated core/doctor.el into it, as to avoid naming conflicts
  between it and Emacs doctor.
- The defcli! macro now has a special syntax for declaring flags, their
  arguments and descriptions.

Addresses #1981, #1925, #1816, #1721, #1322

core/cli/install.el

@@ -1,13 +1,11 @@
 ;;; core/cli/install.el -*- lexical-binding: t; -*-
 
-(defcli! quickstart (&rest args)  ; DEPRECATED
-  "This is a deprecated alias for 'doom install'.
-
-See 'doom help install' instead."
-  :hidden t
-  (apply #'doom-cli-install args))
-
-(defcli! (install i) (&rest args)
+(defcli! (install i)
+    ((noconfig-p  ["--no-config"]  "Don't create DOOMDIR or dummy files therein")
+     (noenv-p     ["--no-env"]     "Don't generate an envvars file (see 'doom help env')")
+     (noinstall-p ["--no-install"] "Don't auto-install packages")
+     (nofonts-p   ["--no-fonts"]   "Don't install (or prompt to install) all-the-icons fonts")
+     &rest args)
   "Installs and sets up Doom Emacs for the first time.
 
 This command does the following:
@@ -25,23 +23,17 @@ The location of DOOMDIR can be changed with the -p option, or by setting the
 DOOMDIR environment variable. e.g.
 
   doom -p ~/.config/doom install
-  DOOMDIR=~/.config/doom doom install
-
-The following switches are recognized:
-
-  --no-config    Don't create DOOMDIR or dummy files therein
-  --no-install   Don't auto-install packages
-  --no-env       Don't generate an envvars file (see `doom help env`)
-  --no-fonts     Don't install (or prompt to install) all-the-icons fonts
-  -y / --yes     Auto-accept any confirmation prompts"
+  DOOMDIR=~/.config/doom doom install"
+  :bare t
   (print! (green "Installing Doom Emacs!\n"))
   (let ((default-directory (doom-path "~")))
     ;; Create `doom-private-dir'
-    (if (member "--no-config" args)
+    (if noconfig-p
         (print! (warn "Not copying private config template, as requested"))
-      (print! "> Creating %s" (relpath doom-private-dir))
+      (print! (start "Creating %s") (relpath doom-private-dir))
       (make-directory doom-private-dir 'parents)
-      (print! (success "Created %s") (relpath doom-private-dir))
+      (print-group!
+       (print! (success "Created %s") (relpath doom-private-dir)))
 
       ;; Create init.el, config.el & packages.el
       (mapc (lambda (file)
@@ -71,26 +63,29 @@ The following switches are recognized:
 
     ;; In case no init.el was present the first time `doom-initialize-modules' was
     ;; called in core.el (e.g. on first install)
-    (doom-initialize-packages 'force-p)
+    (doom-initialize 'force)
+    (doom-initialize-modules)
 
-    ;; Ask if Emacs.app should be patched
-    (if (member "--no-env" args)
-        (print! (warn "- Not generating envvars file, as requested"))
-      (when (or doom-auto-accept
-                (y-or-n-p "Generate an env file? (see `doom help env` for details)"))
-        (doom-reload-env-file 'force-p)))
+    ;; Ask if user would like an envvar file generated
+    (if noenv-p
+        (print! (warn "Not generating envvars file, as requested"))
+      (if (file-exists-p doom-env-file)
+          (print! (info "Envvar file already exists, skipping"))
+        (when (or doom-auto-accept
+                  (y-or-n-p "Generate an env file? (see `doom help env` for details)"))
+          (doom-cli-reload-env-file 'force-p))))
 
     ;; Install Doom packages
-    (if (member "--no-install" args)
-        (print! (warn "- Not installing plugins, as requested"))
+    (if noinstall-p
+        (print! (warn "Not installing plugins, as requested"))
       (print! "Installing plugins")
-      (doom-packages-install doom-auto-accept))
+      (doom-cli-packages-install doom-auto-accept))
 
     (print! "Regenerating autoloads files")
     (doom-reload-autoloads nil 'force-p)
 
-    (if (member "--no-fonts" args)
-        (print! (warn "- Not installing fonts, as requested"))
+    (if nofonts-p
+        (print! (warn "Not installing fonts, as requested"))
       (when (or doom-auto-accept
                 (y-or-n-p "Download and install all-the-icon's fonts?"))
         (require 'all-the-icons)
@@ -98,6 +93,9 @@ The following switches are recognized:
                                    (IS-LINUX 'x))))
           (all-the-icons-install-fonts 'yes))))
 
+    (when (file-exists-p "~/.emacs")
+      (print! (warn "A ~/.emacs file was detected. This conflicts with Doom and should be deleted!")))
+
     (print! (success "\nFinished! Doom is ready to go!\n"))
     (with-temp-buffer
       (doom-template-insert "QUICKSTART_INTRO")