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Add function to generate playlists from git-annex metadata

This had been done manually from the shell until now.
master
Daniel Borchmann 2 years ago
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commit
845d5d137c
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  1. 48
      site-lisp/db-music.el

48
site-lisp/db-music.el

@ -157,6 +157,54 @@ Candidates are taken from `db/radio-stations'."
cdr
emms-play-url))
;; Playlist management
(cl-defun db/write-m3u-playlist-from-git-annex-find
(file name match-expression
&optional (base-dir emms-source-file-default-directory) overwrite)
"Write an M3U playlist to FILE with NAME containing all files
found by git-annex-find using MATCH-EXPRESSION. NAME will be
written to the M3U playlist using the non-standard #PLAYLIST:
directive. Conduct search with git-annex-find in BASE-DIR.
Query for overwrite if FILE already exists, unless OVERWRITE is
non-nil."
(interactive "FFile name of playlist: \nsPlaylist name: \nsgit annex match-expression: ")
(let ((base-dir (expand-file-name base-dir)))
(unless (file-accessible-directory-p base-dir)
(user-error "Error: “%s” is not a valid directory" base-dir))
(unless (or (not (file-exists-p file))
overwrite
(yes-or-no-p (format "File %s already exists, overwrite?" file)))
(user-error "Error: %s exists and shall not be overwritten, aborting." file))
(let ((default-directory base-dir))
(with-temp-buffer
(insert "#EXTM3U\n")
(insert (format "#PLAYLIST: %s\n" name))
(let* ((return-code nil)
(output (with-output-to-string
(with-current-buffer standard-output
(setq return-code (apply #'call-process
"git" nil t nil
"annex" "find"
(split-string match-expression)))))))
(if (not (zerop return-code))
(error "%s" output)
(insert output)
(write-file file)))))))
(defun db/update-playlist-files ()
"Update personal playlist files."
(interactive)
(message "Update favorites playlist")
(db/write-m3u-playlist-from-git-annex-find
"~/Documents/media/audio/others/daniels-favorite.m3u" "Daniel's Favorites"
"../songs/ --metadata rating-daniel>=0.9" "~/Documents/media/audio/others/" t)
(message "Update work playlist")
(db/write-m3u-playlist-from-git-annex-find
"~/Documents/media/audio/others/daniels-work-list.m3u" "Daniel's Work Music"
"../songs/ --metadata db-work=include" "~/Documents/media/audio/others/" t))
(provide 'db-music)

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