From 7e310953c0ac6d75c5fa32b4544c84e0042c9b5b Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Mon, 21 Dec 2020 16:46:16 +0000
Subject: Add C++ post processor

Defaults to clang-format -i, same as slicer.
---
 icespider/compile/main.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/icespider/compile/main.cpp b/icespider/compile/main.cpp
index 5796bae..b8eb26e 100644
--- a/icespider/compile/main.cpp
+++ b/icespider/compile/main.cpp
@@ -1,7 +1,28 @@
 #include "routeCompiler.h"
+#include <boost/algorithm/string/split.hpp>
 #include <boost/program_options.hpp>
+#include <compileTimeFormatter.h>
 
 namespace po = boost::program_options;
+using namespace AdHoc::literals;
+
+static std::string
+defaultPostProcessor()
+{
+	constexpr std::array<const std::pair<std::string_view, std::string_view>, 1> pps {{
+			{"clang-format", "-i"},
+	}};
+	const std::string_view path {getenv("PATH")};
+	const auto pathBegin = make_split_iterator(path, first_finder(":", boost::is_equal()));
+	for (const auto & [cmd, opts] : pps) {
+		for (auto p = pathBegin; p != decltype(pathBegin) {}; ++p) {
+			if (std::filesystem::exists(std::filesystem::path(p->begin(), p->end()) / cmd)) {
+				return "%? %?"_fmt(cmd, opts);
+			}
+		}
+	}
+	return "";
+}
 
 int
 main(int c, char ** v)
@@ -9,12 +30,14 @@ main(int c, char ** v)
 	bool showHelp;
 	IceSpider::Compile::RouteCompiler rc;
 	std::filesystem::path input, output;
+	std::string post;
 	po::options_description opts("IceSpider compile options");
 	// clang-format off
 	opts.add_options()
 		("input", po::value(&input), "Input .json file")
 		("output", po::value(&output), "Output .cpp file")
 		("include,I", po::value(&rc.searchPath)->composing(), "Search path")
+		("post,p", po::value(&post)->default_value(defaultPostProcessor()), "Post-process command")
 		("help,h", po::value(&showHelp)->default_value(false)->zero_tokens(), "Help")
 		;
 	// clang-format on
@@ -34,5 +57,10 @@ main(int c, char ** v)
 	rc.searchPath.push_back(input.parent_path());
 	rc.compile(input, output);
 
+	if (!post.empty()) {
+		auto outputh = std::filesystem::path(output).replace_extension(".h");
+		return system("%? %? %?"_fmt(post, output, outputh).c_str());
+	}
+
 	return 0;
 }
-- 
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