From 3443b74c66f2a01b79c7322b3908ae797b6bda1b Mon Sep 17 00:00:00 2001
From: Kyle Meyer <kyle@kyleam.com>
Date: Sun, 6 Mar 2016 01:22:32 -0500
Subject: Add command to list orphan bibs

---
 NEWS   |  1 +
 bog.el | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/NEWS b/NEWS
index 64b905c..6cdbe4b 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,7 @@ Bog NEWS -- history of user-visible changes         -*- mode: org; -*-
 
 ** New features
 
+- New command ~bog-list-orphan-files~.
 - New command ~bog-dired-jump-to-citekey-file~.
 
 * v1.1.0
diff --git a/bog.el b/bog.el
index f5123fc..41cc99d 100644
--- a/bog.el
+++ b/bog.el
@@ -914,6 +914,26 @@ instead of citekeys from file names in `bog-bib-directory'."
                   (lambda (dir) (directory-files dir nil ".*\\.bib$" t))
                   dirs)))))))
 
+;;;###autoload
+(defun bog-list-orphan-bibs ()
+  "Find bib citekeys that don't have a citekey heading."
+  (interactive)
+  (let ((orphans (bog--set-difference (bog-bib-citekeys)
+                                      (bog-all-heading-citekeys)))
+        (orphan-bufname "*Bog orphan bibs*"))
+    (if orphans
+        (with-current-buffer (get-buffer-create orphan-bufname)
+          (erase-buffer)
+          (setq default-directory bog-root-directory)
+          (insert ?\n)
+          (insert (mapconcat #'identity orphans "\n"))
+          (goto-char (point-min))
+          (org-mode)
+          (pop-to-buffer (current-buffer)))
+      (let ((old-buf (get-buffer-create orphan-bufname)))
+        (when old-buf
+          (kill-buffer old-buf)))
+      (message "No orphans found"))))
 
 ;;; Web
 
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