refactor(wpcarro): Remove briefcase references

TL;DR:
- prefer WPCARRO env-var to BRIEFCASE
- remove repository URLs from Emacs libraries
- prefer tvl-depot-path where possible
- reduce the scope of constants.el
- prune (some not all) stale CI configuration

Change-Id: I21e9130402502ec6fa2fc4b46753c890069be62d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4545
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>

users/wpcarro/emacs/.emacs.d/wpc/wpc-nix.el

@@ -3,7 +3,6 @@
 ;; Author: William Carroll <wpcarro@gmail.com>
 ;; Version: 0.0.1
 ;; Package-Requires: ((emacs "25.1"))
-;; Homepage: https://user.git.corp.google.com/wpcarro/briefcase
 
 ;;; Commentary:
 ;; Configuration to support working with Nix.
@@ -14,8 +13,7 @@
 ;; Dependencies
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-(require 'device)
-(require 'constants)
+(require 'tvl)
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Library
@@ -24,49 +22,16 @@
 (use-package nix-mode
   :mode "\\.nix\\'")
 
-;; TODO(wpcarro): Ensure the sub-process can resolve <briefcase>.
 (defun wpc-nix-rebuild-emacs ()
   "Use nix-env to rebuild wpcarros-emacs."
   (interactive)
-  (let* ((pname (format "nix-build <briefcase/emacs.nixos>"))
+  (let* ((pname (format "nix-env -iA users.wpcarro.emacs.nixos"))
          (bname (format "*%s*" pname)))
     (start-process pname bname
                    "nix-env"
-                   "-I" (format "briefcase=%s" constants-briefcase)
-                   "-f" "<briefcase>" "-iA" "emacs.nixos")
+                   "-f" tvl-depot-path
+                   "-iA" "users.wpcarro.emacs.nixos")
     (display-buffer bname)))
 
-(defun wpc-nix-sly-from-briefcase (attr)
-  "Start a Sly REPL configured using the derivation pointed at by ATTR.
-
-  The derivation invokes nix.buildLisp.sbclWith and is built asynchronously.
-  The build output is included in the error thrown on build failures."
-  (interactive "sAttribute: ")
-  (lexical-let* ((outbuf (get-buffer-create (format "*briefcase-out/%s*" attr)))
-         (errbuf (get-buffer-create (format "*briefcase-errors/%s*" attr)))
-         (expression (format "let briefcase = import <briefcase> {}; in briefcase.third_party.depot.nix.buildLisp.sbclWith [ briefcase.%s ]" attr))
-         (command (list "nix-build" "-E" expression)))
-    (message "Acquiring Lisp for <briefcase>.%s" attr)
-    (make-process :name (format "nix-build/%s" attr)
-                  :buffer outbuf
-                  :stderr errbuf
-                  :command command
-                  :sentinel
-                  (lambda (process event)
-                    (unwind-protect
-                        (pcase event
-                          ("finished\n"
-                           (let* ((outpath (s-trim (with-current-buffer outbuf
-                                                     (buffer-string))))
-                                  (lisp-path (s-concat outpath "/bin/sbcl")))
-                             (message "Acquired Lisp for <briefcase>.%s at %s"
-                                      attr lisp-path)
-                             (sly lisp-path)))
-                          (_ (with-current-buffer errbuf
-                               (error "Failed to build '%s':\n%s" attr
-                                      (buffer-string)))))
-                      (kill-buffer outbuf)
-                      (kill-buffer errbuf))))))
-
 (provide 'wpc-nix)
 ;;; wpc-nix.el ends here