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view_attachment.sh file for mutt on OSX. Tweaked from others available on the net to handle filenames with multiple dots in them, as well as correctly parsing the output of `file -bi` when a type is not specified.
#!/bin/bash
#
# Author: Eric Gebhart
#
# Purpose: To be called by mutt as indicated by .mailcap to handle mail attachments.
#
# Function: Copy the given file to a temporary directory so mutt
# Won't delete it before it is read by the application.
#
# Along the way, discern the file type or use the type
# That is given.
#
# Finally use 'open' or 'open -a' if the third argument is
# given.
#
#
# Arguments:
#
# $1 is the file
# $2 is the type - for those times when file magic isn't enough.
# I frequently get html mail that has no extension
# and file can't figure out what it is.
#
# Set to '-' if you don't want the type to be discerned.
# Many applications can sniff out the type on their own.
# And they do a better job of it too.
#
# Open Office and MS Office for example.
#
# $3 is open with. as in open -a 'open with this .app' foo.xls
#
# Examples: These are typical .mailcap entries which use this program.
#
# Image/JPEG; /Users/vdanen/.mutt/view_attachment %s
# Image/PNG; /Users/vdanen/.mutt/view_attachment %s
# Image/GIF; /Users/vdanen/.mutt/view_attachment %s
#
# Application/PDF; /Users/vdanen/.mutt/view_attachment %s
#
# #This HTML example passes the type because file doesn't always work and
# #there aren't always extensions.
#
# text/html; /Users/vdanen/.mutt/view_attachment %s html
#
# # If your Start OpenOffice.org.app is spelled with a space like this one, <--
# # then you'll need to precede the space with a \ . I found that too painful
# # and renamed it with an _.
#
# Application/vnd.ms-excel; /Users/vdanen/.mutt/view_attachment %s "-" '/Applications/OpenOffice.org1.1.2/Start_OpenOffice.org.app'
# Application/msword; /Users/vdanen/.mutt/view_attachment %s "-" '/Applications/OpenOffice.org1.1.2/Start_OpenOffice.org.app'
#
#
# Debugging: If you have problems set debug to 'yes'. That will cause a debug file
# be written to /tmp/mutt_attach/debug so you can see what is going on.
#
# See Also: The man pages for open, file, basename
#
# the tmp directory to use.
tmpdir="$HOME/.mutt/tmp/mutt_attach"
# the name of the debug file if debugging is turned on.
debug_file=$tmpdir/debug
# debug. yes or no.
#debug="no"
debug="yes"
type=$2
open_with=$3
# make sure the tmpdir exists.
mkdir -p $tmpdir
# clean it out. Remove this if you want the directory
# to accumulate attachment files.
rm -rf $tmpdir/*
# Mutt puts everything in /tmp by default.
# This gets the basic filename from the full pathname.
filename=`basename $1`
# get rid of the extenson and save the name for later.
#file=`echo $filename | cut -d"." -f1`
file=`echo $filename | sed 's/\.[^.]*$//'`
if [ $debug = "yes" ]; then
echo "1:" $1 " 2:" $2 " 3:" $3 > $debug_file
echo "Filename:"$filename >> $debug_file
echo "File:"$file >> $debug_file
echo "===========================" >> $debug_file
fi
# if the type is empty then try to figure it out.
if [ -z $type ]; then
#type=`file -bi $1 | cut -d"/" -f2`
type=`file -bi $1 | sed -e 's/^[^\/]*\///' -e 's/;.*$//'`
fi
# if the type is '-' then we don't want to mess with type.
# Otherwise we are rebuilding the name. Either from the
# type that was passed in or from the type we discerned.
if [ $type = "-" ]; then
newfile=$filename
else
newfile=$file.$type
fi
newfile=$tmpdir/$newfile
# Copy the file to our new spot so mutt can't delete it
# before the app has a chance to view it.
cp $1 $newfile
if [ $debug = "yes" ]; then
echo "File:" $file "TYPE:" $type >> $debug_file
echo "Newfile:" $newfile >> $debug_file
echo "Open With:" $open_with >> $debug_file
fi
# If there's no 'open with' then we can let preview do it's thing.
# Otherwise we've been told what to use. So do an open -a.
if [ -z $open_with ]; then
open $newfile
else
open -a "$open_with" $newfile
fi
Owner

xxx commented Jun 16, 2012

Originally linked from http://linsec.ca/Using_mutt_on_OS_X , and the file itself at http://linsec.ca/files/c/c9/View_attachment.sh . Gist description silently cuts off after an unspecified length or this would be there.

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