#!/usr/bin/c++script
#include <algorithm>
progdesc ("Sample grep utility\n\n\tgrep pattern file ...\n\tgrep pattern\n");
option<bool> count ('c',"count","Produce the match count",false,false);
option<bool> quiet ('q',"quiet","No output, only return 0 if one match found",false,false);

bool foundone = false;
if (args.size() == 0){
	usage();
}else{
	string pattern = args[0];
	if (args.size() == 1){
		// Read from stdin. FILENAME("-") is stdin
		args.push_back("-");
	}
	// Find the longest argument, for formatting
	auto files = args|views::drop(1);
	auto maxsize = ranges::max_element(files,[](auto &t1, auto &t2){return t1.size() < t2.size();})->size();
	for (auto &file:files){
		FILENAME f(file);
		unsigned nbmatch = 0;
		for (auto &l:f.cat()|contain(pattern)){
			nbmatch++;
			foundone = true;
			if (!quiet.val && !count.val){
				if (args.size() > 2){
					cout << format ("{:{}}, line {:4}: {}\n",file,maxsize,l.line_number,l.line);
				}else{
					cout << format ("Line {:4}: {}\n",l.line_number,l.line);
				}
			}
		}
		if (count.val) cout << format ("{:{}} : {}\n",file,maxsize,nbmatch);
		if (foundone && quiet.val) break;
	}
}
return foundone ? 0 : -1;