dotfiles/.local/bin/scripts/b

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#!/bin/bash
# [b]rowse - overview of given files or current directory
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# depends: tput stat bat checkaccess(in my dotfiles)
# optdepends: timg, neovim (compressed files), pdftoppm (PDF), mtn (video), audiowaveform
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# args: files to inspect
#
# Supports:
# - listing directories
# - listing contents of any compressed file with neovim
# - visual files are displayed with timg
# video thumbnails via mtn, pdf pages from pdftoppm
# - text files are displayed through bat
# Automatically requests elevation through sudo when needed
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set -o pipefail
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for last; do true; done
last=${last:-.}
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checkperm() {
checkaccess -r "$@" || elevate=sudo
mime="$(test -n "$shifted" || $elevate file --dereference --mime "$@")"
}
checkperm "$last"
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fileinfo() {
tput setaf 6
for arg
do case "$arg" in (-*) continue;; esac
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$elevate file -E "$arg" &&
ffprobe "$arg" 2>&1 | grep Duration | grep -v '00:00:00.04' | sed 's/, start:[^,]\+,/,/' ||
stat --format '%A %s - birth %.10w mod %.10y' "$arg" | numfmt --field=3 --to=iec-i --padding=6 --suffix=B
done
}
prefix=/tmp/b
mkdir -p "$prefix"
declare -a timg bat ls
for arg; do
case "$arg" in (-*) args="$args $arg"; continue;; esac
checkperm "$arg"
grid=$(expr $(tput cols) / 20)
tmpfile="$prefix/$(basename "$arg")"
case "$mime" in
(*\ application/pdf\;*)
test -f "$tmpfile-1.png" || pdftoppm -r 70 "$arg" "$tmpfile" -l $(expr $grid '*' 2)
timg -W --grid=$grid "$tmpfile"*
;;
(*\ video/*)
suffix=_thumbs.jpg
mtn -i -t -W -D6 -b 0,6 -c $grid -w $(expr $(tput cols) '*' 20) -O $prefix -o $suffix "$arg" 2>/dev/null
timg -W "$prefix/$(basename "${arg%.*}")$suffix"
;;
(*\ image/*)
timg+=("$arg"); continue;;
(*\ inode/directory\;*)
ls+=("$arg"); continue;;
(*)
case "$(file "$arg")" in
(*\ ?udio*)
img="$tmpfile.png"
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if which audiowaveform 2>/dev/null >&2
then find "$img" -not -empty 2>/dev/null | grep --quiet . ||
audiowaveform --quiet --pixels-per-second 2 --height 36 --width 2000 --amplitude-scale auto \
--background-color 000000 --waveform-color 99BBFF --axis-label-color 000000 \
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--input-filename "$arg" --output-format png >"$img" && {
timg -g $(tput cols)x2 "$arg" && printf "\\033[2A "
timg -g $(tput cols)x2 --auto-crop --upscale "$img"
}
fi
;;
(*:\ *compress*|*tar\ archive)
if test $# = 1
then nvim "$arg"
else case "$arg" in (*.part);; (*)
nvim -es "+2w$tmpfile|5,w>>$tmpfile" "$arg"
bat+=("$tmpfile");;
esac; fi
;;
(*) bat+=("$arg"); continue;;
esac
;;
esac
fileinfo "$arg"
done
if test "$timg"; then
tput sgr0
$elevate timg --center -t0.3 $(test $# -gt 1 &&
echo "--title --grid=$(expr $(tput cols) / 30)" ||
echo "-g 60x$(expr $(tput lines) / 2)") "$@" 2>/dev/null
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for img in "${timg[@]}"
do printf "%11s %-30s %s\n" "$(identify -format "%wx%h" "$img")" "$img" "$(identify -precision 3 -format "%b %m %[bit-depth]-bit %[colorspace]" "$img")"
done
fi
if test "$bat"; then
tput sgr0
test $# -gt ${#bat[@]} && test -z "$args" &&
$elevate head "${bat[@]}" ||
$elevate bat --style header --pager 'less -RF' $args "${bat[@]}"
fileinfo "${bat[@]}"
fi
if test "$ls"; then
tput sgr0
$elevate ls -l $(test $# -gt ${#ls[@]} && echo "-d") --color=always --human-readable --group-directories-first --file-type --dereference-command-line --all "${ls[@]}" | less -RF
fi