From c86aabf53bdbce9819360ebb1caae2d80fc0f685 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Fri, 31 Jul 2020 02:52:57 +0530
Subject: Introduce ennum-directory-files.

ennum-directory-files is a more convenient around directory-files and
directory-files-recursively.

* ennum.el (ennum-directory-files): New function.
(ennum-posts, ennum-video-poster, ennum-publish): Use
ennum-directory-files.
(ennum-publish-generic): Accept files that are not prefixed by
other-files-directory.
---
 ennum.el | 54 ++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 34 insertions(+), 20 deletions(-)

diff --git a/ennum.el b/ennum.el
index 2ca8dc2..aadd688 100644
--- a/ennum.el
+++ b/ennum.el
@@ -25,11 +25,11 @@
   inputs outputs publish)
 
 (defun ennum-posts (posts-directory)
-  (sort (seq-map 'ennum-read-post
-                 (file-expand-wildcards
-                  (concat (file-name-as-directory
-                           (ennum-setting :posts-directory))
-                          "*.org")))
+  (sort (ennum--filter-map (lambda (file)
+                             (when (string= (file-name-extension file) "org")
+                               (ennum-read-post
+                                (ennum--expand-relative file (ennum-setting :posts-directory)))))
+                           (ennum-directory-files (ennum-setting :posts-directory)))
         'ennum-later-post-p))
 
 (defun ennum-later-post-p (post1 post2)
@@ -105,6 +105,23 @@ last form in BODY."
      (insert-file-contents ,file)
      ,@body))
 
+(defun ennum-directory-files (directory &optional full include-directories)
+  "Return recursively the list of all files under DIRECTORY. Files are
+returned in depth first order.
+
+If FULL is non-nil, absolute file names are returned. Else, the
+file names are relative to DIRECTORY. If INCLUDE-DIRECTORIES is
+non-nil, include directories in the output."
+  (let ((files (directory-files-recursively
+                directory (rx anything) include-directories)))
+    (if full
+        files
+      (seq-map (apply-partially 'string-remove-prefix
+                                ;; Expand directory in case it is a
+                                ;; relative path.
+                                (file-name-as-directory (expand-file-name directory)))
+               files))))
+
 (defun ennum--org-output-filename (filename)
   (concat (file-name-sans-extension filename) ".html"))
 
@@ -155,25 +172,24 @@ last form in BODY."
 
 (defun ennum-publish-generic (other-files-directory file)
   (ennum-make-operation
-   :inputs (list file)
+   :inputs (list (ennum--expand-relative file other-files-directory))
    :outputs
-   (list (string-remove-prefix
-          (file-name-as-directory other-files-directory)
-          (pcase (file-name-extension file)
-            ("org" (ennum--org-output-filename file))
-            (_ file))))
+   (list (pcase (file-name-extension file)
+           ("org" (ennum--org-output-filename file))
+           (_ file)))
    :publish (lambda (output-file)
               (pcase (file-name-extension file)
                 ("org" (ennum-with-file-contents file
                          (org-export-to-file 'html output-file)))
-                (_ (ennum-copy file output-file))))))
+                (_ (ennum-copy (ennum--expand-relative file other-files-directory)
+                               output-file))))))
 
 (defun ennum-video-poster (video)
-  (pcase (directory-files (ennum-setting :images-directory) nil
-                          (concat (file-name-sans-extension video)
-                                  "\\.\\(jpg\\|png\\)$"))
-    (`(,poster . ,_) poster)
-    (`() (user-error "Poster for %s not found" video))))
+  (or (seq-find (lambda (file)
+               (string= (file-name-base file)
+                        (file-name-base video)))
+                (ennum-directory-files (ennum-setting :images-directory)))
+      (user-error "Poster for %s not found" video)))
 
 (defun ennum-add-tongue-suffix (filename tongue)
   (pcase tongue
@@ -500,9 +516,7 @@ as keys. Keys are compared using `equal'."
           ;; Publish other files
           (when-let ((other-files-directory (ennum-setting :other-files-directory)))
             (seq-map (apply-partially 'ennum-publish-generic other-files-directory)
-                     (seq-map (apply-partially 'string-remove-prefix
-                                               (file-name-as-directory (expand-file-name default-directory)))
-                              (directory-files-recursively other-files-directory "."))))))
+                     (ennum-directory-files other-files-directory)))))
         ;; Replace old output directory
         (let ((output (ennum-setting :output-directory)))
           (delete-directory output t)
-- 
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