M bin/bud → bin/bud

@@ -6,7 +6,8 @@ img() {
     [ -d "$1" ] && {
         set +f
         set -f -- "$1/"*
-        shift "$(shuf -i "1-$#" -n 1)"
+        int="$(shuf -i "1-$#" -n 1)"
+		shift $(expr $int - 1)
     }
 
     [ -f "${img:=$1}" ] || exit 1

M bin/paleta → bin/paleta

@@ -0,0 +1,101 @@ 
+#!/usr/bin/env bash
+#
+# paleta - change terminal colors on the fly.
+
+read_input() {
+    [[ $1 == -v ]] && {
+        printf 'paleta 1.0.0\n'
+        exit
+    }
+
+    [[ $1 == -r ]] && {
+        load_sequences
+        exit
+    }
+
+    # Input from space separated arguments.
+    [[ $1 ]] && {
+        input=("$@")
+
+        # Input from single string.
+        ((${#input[@]} == 1 && ${#input[0]} > 7)) &&
+            read -ra input <<< "${input[*]}"
+
+        # Input from file argument.
+        (($# == 1)) && [[ -f $1 ]] &&
+            IFS=$'\n ' read -d "" -ra input < "$1"
+    }
+
+    # Input from stdin.
+    [[ $1 ]] || IFS=$'\n ' read -d "" -ra input </dev/stdin
+
+    [[ $* == *-* || -z $1 && -z ${input[0]} ]] && {
+        printf 'usage: paleta -r, paleta [colors], paleta file\n'
+        printf '  - [colors] a space separated list of hex colors.\n'
+        exit 1
+    }
+}
+
+parse_colors() {
+    ((${#input[@]} > 16)) &&
+        printf 'warn: Too many colors specified, ignoring past 16th.\n' >&2
+
+    ((${#input[@]} < 16)) &&
+        printf 'warn: Too few colors given, repeating last color.\n' >&2
+
+    for ((i=0; i<16; i++)); {
+        [[ ${input[i]:-000000} =~ ^#?[a-fA-F0-9]{6}$ ]] || {
+            printf '%s\n' "error: Color [$((i+1))] isn't a valid hex color." >&2
+            exit 1
+        }
+
+        # Use the last defined color for all colors if less than
+        # 16 colors were given as input.
+        colors[i]=${input[i]:-${input[-1]}}
+        colors[i]=\#${colors[i]//\#}
+    }
+}
+
+make_sequences() {
+    # Colors 0-15.
+    for ((i=0;i<${#colors[@]};i++)) {
+        sequences+="]4;${i};${colors[i]}\\"
+    }
+
+    # 10: Foreground color,
+    # 11: Background color,
+    # 12: Cursor Foreground color.
+    # Source: https://goo.gl/KcoQgP
+    sequences+="]10;${colors[15]}\\"
+    sequences+="]11;${colors[0]}\\"
+    sequences+="]12;${colors[15]}\\"
+
+    # Border Background color (URxvt).
+    # (VTE doesn't handle unknown sequences very well.
+    #  Skip this sequence if running in VTE.)
+    [[ $VTE_VERSION ]] || sequences+="]708;${colors[0]}\\"
+}
+
+send_sequences() {
+    for tty in /dev/pts/[0-9]*; do
+        [[ -w $tty ]] && printf %b "$sequences" > "$tty" &
+    done
+
+    printf %b "$sequences" > "$cache_dir/colors"
+}
+
+load_sequences() {
+    [[ -f $cache_dir/colors ]] &&
+        printf %b "$(< "${cache_dir}/colors")"
+}
+
+main() {
+    mkdir -p "${cache_dir:=${XDG_CACHE_HOME:=${HOME}/.cache}/paleta}"
+
+    read_input "$@"
+    parse_colors
+    make_sequences
+    send_sequences &
+}
+
+main "$@"