[Music] Introduce ‘db/play-auto-playlist’
This is the main entry point to play automatically generated playlists (“auto playlists”). It is using the value of ‘db/auto-playlist-file-function’ to generate a list of files to play. This list if currently played using EMMS, via ‘db/-emms-playlist-from-files’.
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init.el
12
init.el
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@ -2145,10 +2145,14 @@ search commands like `db/helm-shortcuts’."
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(require 'helm-adaptive)))
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(use-package db-music
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:init (setq db/playlist-play-function #'db/play-playlist-from-git-annex-find)
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:commands (db/play-playlist-from-cache
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db/play-playlist-from-git-annex-find
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db/update-playlist-from-directory))
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:init (setq db/auto-playlist-file-function
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#'(lambda ()
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(db/playlist-files-from-git-annex-find
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"--metadata db-playlist=include")))
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:commands (db/play-auto-playlist
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db/playlist-files-from-cache
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db/playlist-files-from-git-annex-find
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db/update-playlist-cache-from-directory))
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;; * Shells and such
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@ -131,7 +131,7 @@ _RET_: ?RET? _M_: ?M?
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("-" emms-volume-lower "lower volume")
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("+" emms-volume-raise "raise volume")
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("M" emms "show playlist")
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("P" (call-interactively db/playlist-play-function)
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("P" (db/play-auto-playlist)
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"Play automatically generated playlist"))
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@ -13,18 +13,22 @@
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:group 'convenience
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:tag "db-music")
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(defcustom db/playlist-play-function #'db/play-playlist-from-cache
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"Function to use to automatically generate playlists"
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(defcustom db/auto-playlist-file-function #'db/play-playlist-from-cache
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"Function that has to return a list of all music files that
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should be included in the auto playlist."
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:group 'db-music
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:type 'function)
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(defcustom db/playlist nil
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"List of songs to include in a random playlist."
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:group 'db-music
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:type '(alist :value-type (choice (const :tag "Undecided" :undecided)
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(const :tag "Include" :include)
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(const :tag "Exclude" :exclude))
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:key-type file))
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(defun db/play-auto-playlist ()
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"Generate playlist using `db/auto-playlist-file-function’ and
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start playing it.
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Current backend is EMMS."
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(interactive)
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(db/-emms-playlist-from-files (funcall db/auto-playlist-file-function)))
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;; Idea: make this customizable, so that we can later switch to another backend
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;; if necessary
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(defun db/-emms-playlist-from-files (files)
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"Generate EMMS playlist from FILES.
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@ -47,16 +51,23 @@ Shuffle it and start playing it afterwards."
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(emms-playlist-select-first)
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(emms-start)))))
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(defun db/play-playlist-from-cache ()
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"Start playing songs from `db/playlist’"
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(interactive)
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(db/-emms-playlist-from-files
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(->> db/playlist
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(cl-remove-if-not #'(lambda (track)
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(eq (cdr track) :include)))
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(mapcar #'car))))
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(defcustom db/playlist nil
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"List of songs to include in a random playlist."
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:group 'db-music
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:type '(alist :value-type (choice (const :tag "Undecided" :undecided)
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(const :tag "Include" :include)
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(const :tag "Exclude" :exclude))
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:key-type file))
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(defun db/play-playlist-from-git-annex-find (match-expression)
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(defun db/playlist-files-from-cache ()
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"Generate files for auto playlist from `db/playlist’ cache."
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(interactive)
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(->> db/playlist
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(cl-remove-if-not #'(lambda (track)
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(eq (cdr track) :include)))
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(mapcar #'car)))
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(defun db/playlist-files-from-git-annex-find (match-expression)
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"Generate playlist from git annex find on MATCH-EXPRESSION.
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Prompts for MATCH-EXPRESSION when called interactively.
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@ -65,27 +76,26 @@ are match it. Assumes `emms-source-file-default-directory’ to be
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part of a git-annex repository, and will complain otherwise."
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(interactive "smatch expression: ")
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(let* ((default-directory emms-source-file-default-directory))
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(db/-emms-playlist-from-files
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(->> (split-string (with-output-to-string
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(with-current-buffer standard-output
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(let ((return-value (apply #'call-process
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"git" nil t nil
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"annex" "find"
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(split-string match-expression))))
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(unless (zerop return-value)
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(error "Call to `git-annex-find’ failed: %s"
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(buffer-string))))))
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"\n")
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(cl-remove-if-not #'(lambda (path)
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(and (not (string-empty-p path))
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(file-exists-p path)
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(file-readable-p path))))
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(mapcar #'(lambda (path)
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(expand-file-name
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path
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emms-source-file-default-directory)))))))
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(->> (split-string (with-output-to-string
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(with-current-buffer standard-output
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(let ((return-value (apply #'call-process
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"git" nil t nil
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"annex" "find"
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(split-string match-expression))))
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(unless (zerop return-value)
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(error "Call to `git-annex-find’ failed: %s"
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(buffer-string))))))
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"\n")
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(cl-remove-if-not #'(lambda (path)
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(and (not (string-empty-p path))
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(file-exists-p path)
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(file-readable-p path))))
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(mapcar #'(lambda (path)
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(expand-file-name
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path
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emms-source-file-default-directory))))))
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(defun db/update-playlist-from-directory (directory)
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(defun db/update-playlist-cache-from-directory (directory)
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"Recursively traverse DIRECTORY and update `db/playlist’.
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Files not present `db/playlist’ but that are found in DIRECTORY
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