Added Pandoc-powered Markdown previewer!

scripts/md-previewer

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+DATADIR="$HOME/.local/share/md-previewer"
+[ ! -d "$DATADIR" ] && mkdir -p "$DATADIR"
+
+CSS="$DATADIR/pub.css"
+if [ ! -e "$CSS" ]; then
+  pushd "$DATADIR"
+  wget https://github.com/manuelp/pandoc-stylesheet/raw/acac36b976966f76544176161ba826d519b6f40c/pub.css \
+    || (echo "ERROR: Unable to fetch CSS!" >&2) || exit 1
+  popd
+fi
+
+case $(uname | tr '[:upper:]' '[:lower:]') in
+  darwin)
+    OPEN=open
+    ;;
+  linux)
+    OPEN=xdg-open
+    ;;
+esac
+
+command -v pandoc || (echo "ERROR: Pandoc not found!" >&2) || exit 1
+HTML=$(sed 's/\.md\s*$/.html/' <<<"$1")
+pandoc "$1" -s -c "$CSS" -o "$HTML"
+
+command -v "$OPEN" || (echo "WARN: Can't open HTML with \"$OPEN\"!  " \
+                            "Please navigate to file://$(realpath "$HTML")" >&2)
+"$OPEN" "$HTML"