Fix #1322: replace load-env-vars w/ custom loader

I've replaced load-env-var with our own custom parser. load-env-var
expects a well-formatted env file, which neither env nor set produces,
which is what doom env uses to dump the shell environment.

This should fix issues that arise when envvars (like PATH) contain
arbitrary whitespace.

core/cli/env.el

@@ -67,7 +67,7 @@ It is rare that you'll need to change this.")
       '("-c")
     ;; Execute twice, once in a non-interactive login shell and once in an
     ;; interactive shell in order to capture all the init files possible.
-    '("-lc" "-ic"))
+    '("-ic"))
   "The `shell-command-switch'es to use on `doom-env-executable'.
 This is a list of strings. Each entry is run separately and in sequence with
 `doom-env-executable' to scrape envvars from your shell environment.")
@@ -110,16 +110,12 @@ order of `doom-env-switches' determines priority."
           "# or set DOOMENV=1 in your shell environment/config.\n"
           "# ---------------------------------------------------------------------------\n\n"))
         (let ((env-point (point)))
+          ;; temporarily unset ignored environment variables
+          (dolist (var doom-env-ignored-vars)
+            (setenv var nil))
           (dolist (shell-command-switch doom-env-switches)
             (message "Scraping env from '%s %s %s'"
                      shell-file-name
                      shell-command-switch
                      doom-env-executable)
-            (insert (shell-command-to-string doom-env-executable)))
-          ;; sort the environment variables
-          (sort-lines nil env-point (point-max))
-          ;; remove adjacent duplicated lines
-          (delete-duplicate-lines env-point (point-max) nil t)
-          ;; remove ignored environment variables
-          (dolist (var doom-env-ignored-vars)
-            (flush-lines (concat "^" var "=") env-point (point-max))))))))
+            (insert (shell-command-to-string doom-env-executable))))))))

core/core-packages.el

@@ -38,7 +38,7 @@ package's name as a symbol, and whose CDR is the plist supplied to its
 `package!' declaration. Set by `doom-initialize-packages'.")
 
 (defvar doom-core-packages
-  '(persistent-soft use-package quelpa async load-env-vars)
+  '(persistent-soft use-package quelpa async)
   "A list of packages that must be installed (and will be auto-installed if
 missing) and shouldn't be deleted.")
 

core/core.el

@@ -427,6 +427,23 @@ in interactive sessions, nil otherwise (but logs a warning)."
          (message "Autoload file warning: %s -> %s" (car e) (error-message-string e))
        (signal 'doom-autoload-error (list (file-name-nondirectory file) e))))))
 
+(defun doom-load-env-vars (file)
+  "Read and set envvars in FILE."
+  (let (vars)
+    (with-temp-buffer
+      (insert-file-contents file)
+      (re-search-forward "\n\n" nil t)
+      (while (re-search-forward "\n\\([^= \n]+\\)=" nil t)
+        (save-excursion
+          (let ((var (match-string 1))
+                (value (buffer-substring-no-properties
+                        (point)
+                        (1- (or (when (re-search-forward "^\\([^= ]+\\)=" nil t)
+                                  (line-beginning-position))
+                                (point-max))))))
+            (setenv var value)))))
+    vars))
+
 (defun doom-initialize (&optional force-p)
   "Bootstrap Doom, if it hasn't already (or if FORCE-P is non-nil).
 
@@ -491,9 +508,8 @@ to least)."
 
     ;; Load shell environment
     (when (and (not noninteractive)
-               (file-readable-p doom-env-file)
-               (require 'load-env-vars nil t))
-      (load-env-vars doom-env-file)
+               (file-readable-p doom-env-file))
+      (doom-load-env-vars doom-env-file)
       (setq exec-path (append (split-string (getenv "PATH") ":")
                               (list exec-directory))
             shell-file-name (or (getenv "SHELL")