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# Exclude files by filesystem type and extension that likely aren't
# viewable/editable in plain text
#
# I've seen some very clever people figure out ways to actually read the files
# or run something like file(1) over them to make an educated guess as to
# whether they're binary or not, but I don't really want to go that far. It's
# not supposed to be perfect, just a bit more likely to complete singly with
# the thing I want, and I want it to stay fast.
#
_text_filenames() {
while IFS= read -r item ; do
# Exclude blanks
[[ -n $item ]] || return
# Exclude files with block, character, pipe, or socket type
[[ ! -b $item ]] || return
[[ ! -c $item ]] || return
[[ ! -p $item ]] || return
[[ ! -S $item ]] || return
# Check the filename extension to know what to exclude
case $item in
# Binary image file formats
*.bmp|*.gif|*.jpeg|*.jpg|*.png|*.xcf) ;;
*.BMP|*.GIF|*.JPEG|*.JPG|*.PNG|*.XCF) ;;
# Video file formats
*.avi|*.gifv|*.mkv|*.mov|*.mpg|*.rm|*.webm) ;;
*.AVI|*.gifv|*.MKV|*.MOV|*.MPG|*.RM|*.WEBM) ;;
# Audio file formats
*.au|*.aup|*.flac|*.mid|*.h2song|*.mp[34]|*.ogg|*.wav) ;;
*.AU|*.AUP|*.FLAC|*.MID|*.H2SONG|*.MP[34]|*.OGG|*.WAV) ;;
# Document formats
*.cbr|*.doc|*.docx|*.odp|*.odt|*.pdf|*.xls|*.xlsx) ;;
*.CBR|*.DOC|*.DOCX|*.ODP|*.ODT|*.PDF|*.XLS|*.XLSX) ;;
# Compressed/archived file formats
# (Yes I know Vim can read these)
*.bz2|*.deb|*.gz|*.tar|*.xz|*.zip) ;;
*.BZ2|*.DEB|*.GZ|*.TAR|*.XZ|*.ZIP) ;;
# Known binary extensions
# (I haven't included .com; on UNIX, that's more likely to be
# something I saved from a website and named after the domain)
*.a|*.dat|*.drv|*.exe|*.o) ;;
*.A|*.DAT|*.DRV|*.EXE|*.O) ;;
# Filesystems
*.bin|*.cue|*.img|*.iso|*.raw) ;;
*.BIN|*.CUE|*.IMG|*.ISO|*.RAW) ;;
# Complete everything else; some of it will still be binary
*) COMPREPLY[${#COMPREPLY[@]}]=$item ;;
esac
done < <(compgen -A file -- "${COMP_WORDS[COMP_CWORD]}")
}
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