feat(sh): add lessfilter script for previewing projects

1 files changed, 237 insertions, 0 deletions

diff --git a/sh/.local/bin/lessfilter b/sh/.local/bin/lessfilter
new file mode 100755
index 0000000..dcd4d01
--- /dev/null
+++ b/sh/.local/bin/lessfilter
@@ -0,0 +1,237 @@
+#!/bin/sh
+
+SCRIPT="$(basename "$0")"
+
+long='width,verbose,help'
+short='wvh'
+
+if ! opts="$(getopt -o $short -l $long -n "$SCRIPT" -- "$@")"; then
+	exit 1
+fi
+
+eval set -- "$opts"
+
+help() {
+	cat <<-EOF
+		$SCRIPT
+		Toby Vincent <tobyv13@gmail.com>
+
+		$SCRIPT
+		    Filter script used for lesspipe.sh filtering
+
+		USAGE:
+		    $SCRIPT [OPTION ...] <PATH> [PATH ...]
+
+		OPTIONS:
+		    -w, --width           Specify width. By default uses FZF_PREVIEW_COLUMNS if
+		                              set, and falls back to COLUMNS
+		    -v, --verbose         Increase verbosity
+		    -h, --help            Show this help
+	EOF
+}
+
+say() {
+	printf "%s: %s\n" "$SCRIPT" "$@"
+}
+
+say_verbose() {
+	if [ "$verbose" -gt "0" ]; then
+		say "$@"
+	fi
+}
+
+say_err() {
+	say "$@" >&2
+}
+
+err() {
+	err_dir="$1"
+	shift
+	say_err "cannot preview '$err_dir': $*"
+	exit 1
+}
+
+err_help() {
+	help
+	err "$*"
+}
+
+has() {
+	command -v "$1" >/dev/null
+}
+
+is_git_repo() {
+	[ -d "$1/.git" ] || git -C "$1" rev-parse --is-inside-work-tree >/dev/null 2>&1
+}
+
+mime() {
+	if [ -e "$1" ]; then
+		mtype=$(file -L -s -b --mime "$1" 2>/dev/null)
+		fcat="${mtype%/*}"
+		mtype="${mtype#*/}"
+		mtype="${mtype%;*}"
+		mtype="${mtype#x-}"
+		mtype="${mtype#vnd\.}"
+
+		if [ "$fcat" = "application" ] &&
+			[ "$ftype" = "octet-stream" ] ||
+			[ "$fcat" = "text" ] &&
+			[ "$ftype" = "plain" ]; then
+			mtype=$(file -L -s -b "$1" 2>/dev/null)
+		fi
+	else
+		case "$1" in
+		http://*)
+			mtype='x-scheme-handler/http'
+			;;
+		https://*)
+			mtype='x-scheme-handler/https'
+			;;
+		*)
+			mtype='repo'
+			;;
+		esac
+	fi
+
+	printf %s\\n "$mtype"
+}
+
+fileext() {
+	case "$1" in
+	.*.*) extension=${1##*.} ;;
+	.*) extension= ;;
+	*.*) extension=${1##*.} ;;
+	esac
+
+	printf %s\\n "$extension"
+}
+
+filetype() {
+	fname="$1"
+	fext=$(fileext "$fname")
+	mtype=$(mime "$fname")
+
+	ft="${mtype#*/}"
+	ft="${ft%;*}"
+	ft="${ft#x-}"
+	ftype="${ft#vnd\.}"
+
+	case "$fext" in
+	epub) [ "$ftype" = "zip" ] && ftype='epub' ;;
+	ipynb) [ "$ftype" = "json" ] && ftype='ipynb' ;;
+	mp3) [ "$ftype" = "mpeg" ] && ftype='mp3' ;;
+	crt | pem) ftype='x509' ;;
+	crl) ftype='crl' ;;
+	csr) ftype='csr' ;;
+	pod) ftype='pod' ;;
+	pm) ftype='perl' ;;
+	md | MD | mkd | markdown | rst) ftype='markdown' ;;
+	log) ftype='log' ;;
+	ebuild | eclass) ftype='sh' ;;
+	esac
+
+	case "$ftype" in
+	openxmlformats-officedocument.wordprocessingml.document) ftype='docx' ;;
+	openxmlformats-officedocument.presentationml.presentation) ftype='pptx' ;;
+	openxmlformats-officedocument.spreadsheetml.sheet) ftype='xlsx' ;;
+	oasis.opendocument.text*) ftype='odt' ;;
+	oasis.opendocument.spreadsheet) ftype='ods' ;;
+	oasis.opendocument.presentation) ftype='odp' ;;
+	sun.xml.writer) ftype='ooffice1' ;;
+	shellscript) ftype='sh' ;;
+	makefile) ftype='make' ;;
+	epub+zip) ftype='epub' ;;
+	matlab-data) ftype='matlab' ;;
+	troff) case "${fname##*/}" in
+		[Mm]akefile | [Mm]akefile.* | BSDMakefile) ftype='make' ;;
+		esac ;;
+	*mat-file*) ftype='matlab' ;;
+	*POD\ document*) ftype='pod' ;;
+	*PEM\ certificate\ request) ftype='csr' ;;
+	*PEM\ certificate) ftype='csr' ;;
+	*Microsoft\ OOXML) ftype='docx' ;;
+	Apple\ binary\ property\ list) ftype='plist' ;;
+	PGP\ *ncrypted* | GPG\ encrypted*) ftype='pgp' ;;
+	Audio\ file\ with\ ID3\ *) ftype='mp3' ;;
+	'OpenOffice.org 1.x Writer document') ftype='ooffice1' ;;
+	# if still unspecific, determine file type by extension
+	data)
+		### binary only file formats, type not guessed by 'file'
+		case "$fext" in
+		mat) ftype='matlab' ;;
+		br | bro | tbr) ftype='brotli' ;;
+		lz4 | lt4 | tz4 | tlz4) ftype='lz4' ;;
+		esac
+		;;
+	esac
+
+	printf %s\\n "$ftype"
+}
+
+verbose=0
+width=${FZF_PREVIEW_COLUMNS:-$COLUMNS}
+while true; do
+	case "$1" in
+	-h | --help)
+		help
+		exit 0
+		;;
+	-v | --verbose)
+		verbose=$((verbose + 1))
+		shift
+		;;
+	-w | --width)
+		width=$2
+		shift 2
+		;;
+	--)
+		shift
+		break
+		;;
+	*)
+		err_help "Invalid argument: $1"
+		;;
+	esac
+done
+
+if [ "$#" -eq 0 ]; then
+	IFS='
+'
+	set -o noglob
+	# shellcheck disable=2046
+	set -- $(cat)
+fi
+
+if [ -z "$width" ]; then
+	width=$(tput cols)
+fi
+
+ft=$(filetype "$1")
+case "$ft" in
+directory)
+	if has onefetch && is_git_repo "$1" 2>/dev/null; then
+		onefetch --hidden --show-logo="$([ "$width" -lt "80" ] && printf 'never' || printf 'always')" "$1" 2>/dev/null
+	elif [ -f "$1/README.md" ]; then
+		$SCRIPT "$1/README.md"
+	else
+		exa --tree --git-ignore --level=3 --icons "$1" 2>/dev/null
+	fi
+	;;
+markdown)
+	bat --color always "$1" 2>/dev/null
+	;;
+http | https)
+	if printf %s\\n "$1" | grep -q "git.sr.ht"; then
+		has hut && hut git show --repo "$1" 2>/dev/null
+	elif printf %s\\n "$1" | grep -q "github.com"; then
+		has gh && gh repo view "$1" 2>/dev/null
+	fi
+	;;
+repo)
+	hut git show --repo "https://git.sr.ht/$1" 2>/dev/null ||
+		gh repo view "https://github.com/$1" 2>/dev/null
+	;;
+*)
+	exit 1
+	;;
+esac