Add simple json reformatter utility

Makefile.am

@@ -102,3 +102,13 @@ lib_LTLIBRARIES  = libutil.la
 libutil_la_SOURCES  = $(UTIL_FILES)
 libutil_la_CXXFLAGS = $(AM_CXXFLAGS)
 libutil_la_LIBADD   = $(BOOST_SYSTEM_LIB)
+
+bin_PROGRAMS = 		\
+    json-clean
+
+json_clean_SOURCES    = json/clean.cpp
+json_clean_DEPENDENCIES = $(top_builddir)/.libs/libutil.la
+json_clean_LDFLAGS    = 		\
+    $(BOOST_LDFLAGS)  			\
+    $(BOOST_FILESYSTEM_LIB) 		\
+    $(top_builddir)/.libs/libutil.a

json/clean.cpp

@@ -0,0 +1,39 @@
+#include "../json.hpp"
+
+#include <cstdlib>
+#include <iostream>
+
+#include <boost/filesystem/path.hpp>
+
+enum {
+    ARG_COMMAND,
+    ARG_INPUT,
+
+    NUM_ARGS
+};
+
+
+void
+print_usage (int argc, char **argv) {
+    (void)argc;
+    std::cerr << "usage: " << argv[0] << " <input>\n";
+}
+
+
+int
+main (int argc, char **argv) {
+    if (argc != NUM_ARGS) {
+        print_usage (argc, argv);
+        return EXIT_FAILURE;
+    }
+
+    try {
+        boost::filesystem::path input (argv[ARG_INPUT]);
+        std::cout << *json::parse (input) << "\n";
+    } catch (const json::error& err) {
+        std::cerr << err.what () << "\n";
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}