Update emacs completion with all options, remove silly mime-hack

__fish_complete_mime used in that way is a no-op on current fish anyway,
and emacs is by no means useful for just text files (it can also view
PDFs, images, ...).

Otherwise this completion currently only offers options, not arguments.

For most these are pretty much incompletable (lisp code, for example),
and for others it's just not all that useful.

Signed-off-by: David Adam <zanchey@ucc.gu.uwa.edu.au>

share/completions/emacs.fish

@@ -1,14 +1,58 @@
-#
-# These completions are uncomplete
-#
+# Initialization options
+complete -c emacs -l batch -d "do not do interactive display; implies -q"
+complete -c emacs -l chdir -d "change to directory DIR"
+complete -c emacs -l daemon -d "start a server in the background"
+complete -c emacs -l debug-init -d "enable Emacs Lisp debugger for init file"
+complete -c emacs -l display -s d -d "use X server DISPLAY"
+complete -c emacs -l no-desktop -d "do not load a saved desktop"
+complete -c emacs -l no-init-file -s q -d "load neither ~/.emacs nor default.el"
+complete -c emacs -l no-loadup -o nl -d "do not load loadup.el into bare Emacs"
+complete -c emacs -l no-site-file -d "do not load site-start.el"
+complete -c emacs -l no-site-lisp -o nsl -d "do not add site-lisp directories to load-path"
+complete -c emacs -l no-splash -d "do not display a splash screen on startup"
+complete -c emacs -l no-window-system -o nw -d "do not communicate with X, ignoring $DISPLAY"
+complete -c emacs -l quick -s Q -d "equivalent to: emacs -l  --no-site-file --no-site-lisp --no-splash"
+complete -c emacs -l script -d "run FILE as an Emacs Lisp script"
+complete -c emacs -l terminal -s t -d "use DEVICE for terminal I/O"
+complete -c emacs -l user -s u -d "load ~USER/.emacs instead of your own"
 
-# Primarily complete text files
-complete -c emacs -x -a "(__fish_complete_mime 'text/*')"
+# Action options:
+complete -c emacs -l directory -s L -d "prepend DIR to load-path (with :DIR, append DIR)"
+complete -c emacs -l eval -d "evaluate Emacs Lisp expression EXPR"
+complete -c emacs -l execute -d "evaluate Emacs Lisp expression EXPR"
+complete -c emacs -l file -d "visit FILE using find-file"
+complete -c emacs -l find-file -d "visit FILE using find-file"
+complete -c emacs -l funcall -s f -d "call Emacs Lisp function FUNC with no arguments"
+complete -c emacs -l insert -d "insert contents of FILE into current buffer"
+complete -c emacs -l kill -d "exit without asking for confirmation"
+complete -c emacs -l load -s l -d "load Emacs Lisp FILE using the load function"
+complete -c emacs -l visit -d "visit FILE using find-file"
 
-complete -c emacs -s q --description "Do not load init files"
-complete -c emacs -s u --description "Load users init file" -xa "(__fish_complete_users)"
-complete -c emacs -s t --description "Use file as terminal" -r
-complete -c emacs -s f --description "Execute Lisp function" -x
-complete -c emacs -s l --description "Load Lisp code from file" -r
-complete -c emacs -o nw --description "Do not use X interface"
-complete -uc emacs -s d -o display --description "Create window on the specified display" -x
+# Display options:
+complete -c emacs -l color -xa "auto never always ansi8" -d "override color mode for character terminals"
+complete -c emacs -l background-color -o bg -d "window background color"
+complete -c emacs -l basic-display -s D -d "disable many display features; used for debugging Emacs"
+complete -c emacs -l border-color -o bd -d "main border color"
+complete -c emacs -l border-width -o bw -d "width of main border"
+complete -c emacs -l cursor-color -o -cr -d "color of the Emacs cursor indicating point"
+complete -c emacs -l font -o fn -d "default font; must be fixed-width"
+complete -c emacs -l foreground-color -o fg -d "window foreground color"
+complete -c emacs -l fullheight -o fh -d "make the first frame high as the screen"
+complete -c emacs -l fullscreen -o fs -d "make the first frame fullscreen"
+complete -c emacs -l fullwidth -o fw -d "make the first frame wide as the screen"
+complete -c emacs -l maximized -o mm -d "make the first frame maximized"
+complete -c emacs -l geometry -s g -d "window geometry"
+complete -c emacs -l no-bitmap-icon -o nbi -d "do not use picture of gnu for Emacs icon"
+complete -c emacs -l iconic -d "start Emacs in iconified state"
+complete -c emacs -l internal-border -o ib -d "width between text and main border"
+complete -c emacs -l line-spacing -o lsp -d "additional space to put between lines"
+complete -c emacs -l mouse-color -o ms -d "mouse cursor color in Emacs window"
+complete -c emacs -l name -d "title for initial Emacs frame"
+complete -c emacs -l no-blinking-cursor -o nbc -d "disable blinking cursor"
+complete -c emacs -l reverse-video -s r -o rv -d "switch foreground and background"
+complete -c emacs -l title -s T -d "title for initial Emacs frame"
+complete -c emacs -l vertical-scroll-bars -o vb -d "enable vertical scroll bars"
+complete -c emacs -l xrm -d "set additional X resources"
+complete -c emacs -l parent-id -d "set parent window"
+complete -c emacs -l help -d "display help and exit"
+complete -c emacs -l version -d "output version information and exit"