feat: add gpgconfig.el

Signed-off-by: Lucas Sta Maria <lucas@priime.dev>

.emacs.d/include/gpgconfig.el

@@ -0,0 +1,54 @@
+;;; gpg.el --- Functions for working with gpg
+;;; Commentary:
+;;    Functions for working with gpg.
+;;; Code:
+
+(defun gpg-public-keys ()
+  "Produces a list of GPG public keys."
+  (interactive)
+
+  (let ((buf (get-buffer-create "*gpg-public-keys*"))
+        (info  (list))
+        (keyid "")
+        (curline  ""))
+    (with-current-buffer buf
+      (insert (shell-command-to-string "gpg -k"))
+      (goto-char (point-min))
+      ;; Clear the prelude
+      (forward-line 2)
+      (delete-region (point-min) (point))
+      (goto-char (point-min))
+      ;; Collect IDs, names, and emails
+      (while (not (eobp))
+        (setq curline (thing-at-point 'line t))
+        (forward-line)
+        (cond ((string-prefix-p "  " curline)
+               (setq keyid (car (split-string curline))))
+              ((string-prefix-p "uid" curline)
+               (let* ((original-length (length curline))
+                      (start-raw (concat (memq (string-to-char "]")
+                                               (string-to-list curline))))
+                      (start (+ 2 (- original-length
+                                     (length start-raw))))
+                      (name-email (substring curline start -1))
+                      (keyid-name-email (concat keyid " " name-email)))
+                 (if (not (memq (string-to-char "(")
+                                (string-to-list name-email)))
+                     (push keyid-name-email info)
+                   ;; Remove key descriptions inside parentheses
+                   (let* ((open-paren-start
+                           (length (concat (memq (string-to-char "(")
+                                                 (string-to-list name-email)))))
+                          (name-part (substring name-email 0 (- open-paren-start)))
+                          (close-paren-start
+                           (length (concat (memq (string-to-char ")")
+                                                 (string-to-list name-email)))))
+                          (email-part (substring name-email
+                                                 (+ 2 (- close-paren-start))))
+                          (sanitized (concat keyid " " name-part email-part)))
+                     (push sanitized info)))))))
+      (setq info (-filter (lambda (s) (not (string-match "image" s))) info))
+      info)))
+
+(provide 'gpgconfig)
+;;; gpgconfig.el ends here

.emacs.d/init.el

@@ -81,6 +81,7 @@
 (load-library "latexconfig")
 (load-library "cppconfig")
 (load-library "pdfconfig")
+(load-library "gpgconfig")
 
 ;; ====== Hooks ==============================
 (add-hook 'after-init-hook      'global-company-mode)