scripts: add gen_man_pages.sh script

scripts/gen_man_pages.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Usage: ./gen_man_pages.sh DESTDIR PREFIX
+
+DESTDIR="$1"
+PREFIX="$2"
+
+# Check if lncli is installed.
+if ! command -v lncli &> /dev/null
+then
+    echo "lncli could not be found. Please install lncli before running this script."
+    exit 1
+fi
+
+# Ignore warnings regarding HTMLBlock detection in go-md2man package
+# since using "<...>" is part of our docs.
+lncli generatemanpage 2>&1 | grep -v "go-md2man does not handle node type HTMLSpan" || true
+
+echo "Installing man pages to $DESTDIR$PREFIX/share/man/man1."
+install -m 644 lnd.1 "$DESTDIR$PREFIX/share/man/man1/lnd.1"
+install -m 644 lncli.1 "$DESTDIR$PREFIX/share/man/man1/lncli.1"
+
+# Remove lncli.1 and lnd.1 artifacts from the current working directory.
+rm -f lncli.1 lnd.1