bin: Add fontview.sh

It's mature enough to replicate to my work computer, it's mature enough
for my dots.

home/bin/fontview.sh

@@ -0,0 +1,63 @@
+#!/bin/sh
+
+HELP_MESSAGE() {
+	local EXIT_CODE="${1:-0}"
+	cat <<EOF
+Usage: $(basename -- "$0") [OPTIONS] [--] FILE...
+Display an image of a font file.
+
+  -h		Show this help message.
+  -t TEXT	Show TEXT instead of default.
+  --		Terminate options list.
+
+Copyright (C) 2015 Dan Church.
+License GPLv3+: GNU GPL version 3 or later (http://gnu.org/licenses/gpl.html).
+This is free software: you are free to change and redistribute it. There is NO
+WARRANTY, to the extent permitted by law.
+EOF
+	exit "$EXIT_CODE"
+}
+
+TEXT=''
+
+while getopts 't:h' flag; do
+	case "$flag" in
+		'h')
+			HELP_MESSAGE 0
+			;;
+		't')
+			TEXT="$OPTARG"
+			;;
+		*)
+			HELP_MESSAGE 1
+			;;
+	esac
+done
+
+shift "$((OPTIND-1))"
+
+TEMP_FILES=()
+
+cleanup() {
+	rm -rf -- "${TEMP_FILES[@]}"
+}
+
+trap 'cleanup'	EXIT
+
+fontimage_args=()
+
+if [ -n "$TEXT" ]; then
+	fontimage_args+=(--text "$TEXT")
+fi
+
+temp_dir="$(mktemp -d -t "$(basename -- "$0").XXXXXX")"
+# XXX : fontimage requires .png extension
+temp="$temp_dir/fontimage.png"
+TEMP_FILES+=("$temp_dir")
+
+for fn; do
+
+	echo "$fn"
+	fontimage "${fontimage_args[@]}" -o "$temp" "$fn" &&
+	xv "$temp"
+done