.mailcap

text/html; w3m -T text/html %s
text/html; w3m -T text/html -dump %s; copiousoutput
text/plain; view %s; needsterminal

text/calendar; icalview.rb; copiousoutput
application/ics; icalview.rb; copiousoutput

# MS Excel
application/x-msexcel; ~/bin/view_attachment %s
application/ms-exc; ~/bin/view_attachment %s
application/excel; ~/bin/view_attachment %s
application/msexcel; ~/bin/view_attachment %s
application/vnd.ms-exc; ~/bin/view_attachment %s
application/vnd.ms-excel; ~/bin/view_attachment %s
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; ~/bin/view_attachment %s

# MS Word
application/msword; ~/bin/view_attachment %s
application/vnd.openxmlformats-officedocument.wordprocessingml.document; ~/bin/view_attachment %s

# Images
image/*; (clear && kitty +kitten icat --hold --scale-up %s && clear); needsterminal

# PDF
application/pdf; ~/bin/view_attachment %s pdf

# HTML
text/html; ~/bin/view_attachment %s html

# Unidentified.
application/octet-stream; ~/bin/view_attachment %s "-"

#application/octet-stream; less %s

#application/pdf; pdftotext -htmlmeta %s - |w3m -T text/html; copiousoutput

application/x-cpio; cpio -tvF --quiet %s; copiousoutput
application/x-tar; tar tvf %s; copiousoutput
application/x-tar-gz; tar tvfz %s; copiousoutput
application/x-zip-compressed; unzip -v %s; copiousoutput
application/zip; unzip -v %s; copiousoutput