reallay the #! patch

config.h

@@ -13,7 +13,8 @@ const char* CXX = "c++";
 #define DEBUG_FLAGS "-g"
 
 // ...when not debugging
-#define RELEASE_FLAGS "-Ofast", "-s"
+// -O2 seems to work best for both execution and compilation speed
+#define RELEASE_FLAGS "-O2", "-s"
 
 // ...for both C and C++
 #define CPPFLAGS  "-fwhole-program", "-march=native", "-Wall", "-Wextra", "-pipe"

install.sh

@@ -13,8 +13,7 @@ chmod 755 cppipe
 mv cppipe ${PREFIX}/bin
 
 # Install headers
-mkdir -p ${PREFIX}/include/cppipe
-chmod 755 ${PREFIX}/include/cppipe
+mkdir -p -m755 ${PREFIX}/include/cppipe
 cp basicTypes.h commands.hpp commands.inl childProcess.hpp childProcess.inl ${PREFIX}/include/cppipe
 chmod 644 ${PREFIX}/include/cppipe/*
 

run_tests.sh

@@ -2,10 +2,11 @@
 set -e
 
 # Test cppipe functions
-OKs=$(test/functions_test.cppipe 2>/dev/null | grep OK | wc -l)
-if ! [ $OKs = 13 ]
+OKs=$(test/functions_test.cppipe | grep OK | wc -l)
+EXPECTED=14
+if ! [ $OKs = $EXPECTED ]
 then
-    echo "Functions test failed: EXPECTED 13 OKs, got $OKs"
+    echo "Functions test failed: EXPECTED $EXPECTED OKs, got $OKs"
     exit 1
 fi
 echo Functions test OK!

src/commands.hpp

@@ -18,11 +18,11 @@ class Cmd
 public:
 	/* all args must be const char* */
 	template<typename... Args>
-	explicit Cmd(Args... args)
-		: argv({args...})
-	{
-		argv.push_back(nullptr);
-	}
+	explicit Cmd(Args...);
+
+	/* Implicitly convert from { "command", "param" }
+	 * e.g: exec({ "cmd", "arg" }); */
+	Cmd(std::initializer_list<const char*> args);
 
 	/* Execute the command, if arguments are not given use stdin,out,err
 	   else use the given file desciptors. this can also be used
@@ -45,8 +45,9 @@ public:
 class PendingCmd
 {
 public:
+	PendingCmd(std::initializer_list<const char*> cmd_args);
 	/* Can be implicitly created from a command */
-	PendingCmd(const Cmd&, fd_t in=0, fd_t out=1, fd_t err=2);
+	PendingCmd(Cmd, fd_t in=0, fd_t out=1, fd_t err=2);
 	/* Execute the command on destruction */
 	~PendingCmd();
 
@@ -60,10 +61,10 @@ public:
 	/* Prevent a pending command from being executed on destruction */
 	void cancel();
 
-	const Cmd& cmd;
-	fd_t in, out, err;
+	Cmd cmd;
+	fd_t in=0, out=1, err=2;
 private:
-	bool execed_;
+	bool execed_ = false;
 
 	friend Proc detach(const PendingCmd&);
 	friend Proc detachRedirIn(const PendingCmd&);

src/commands.inl

@@ -28,6 +28,18 @@ namespace _cppipe
 	}
 }
 
+template<typename... Args>
+inline Cmd::Cmd(Args... args)
+	: Cmd({ args... })
+{
+}
+
+inline Cmd::Cmd(std::initializer_list<const char*> args)
+	: argv(args)
+{
+	argv.push_back(nullptr);
+}
+
 inline DeadProc Cmd::operator()(fd_t in, fd_t out, fd_t err) const
 {
 	Proc p = createProcess(argv.data(), in, out, err);
@@ -58,13 +70,18 @@ inline Cmd& Cmd::operator+=(const char* arg)
 	return *this;
 }
 
+inline PendingCmd::PendingCmd(std::initializer_list<const char*> cmd_args)
+	: cmd(cmd_args)
+	, in(0)
+	, out(1)
+	, err(2)
+{}
 
-inline PendingCmd::PendingCmd(const Cmd& origin, fd_t in, fd_t out, fd_t err)
-	: cmd(origin)
+inline PendingCmd::PendingCmd(Cmd origin, fd_t in, fd_t out, fd_t err)
+	: cmd(std::move(origin))
 	, in(in)
 	, out(out)
 	, err(err)
-	, execed_(false)
 {}
 
 inline PendingCmd::~PendingCmd()

src/cppipe.cpp

@@ -60,7 +60,6 @@ SrcType find_src_type(string_view path);
 const char DEBUG_PREFIX[] = "__DBG";
 
 // Context
-fs::path HOME;
 fs::path src_file;
 SrcType src_type;
 fs::path cache_dir;
@@ -71,6 +70,9 @@ fs::path bin;   // cache bins to avoid recompiles
 bool debug = false;
 // just compare timestamps of the source and bin, don't preprocess
 bool quick = false;
+// Just compile, don't run
+bool dont_run = false;
+vector<const char*> additional_compiler_args;
 
 }
 
@@ -79,7 +81,6 @@ int main(int argc, char* argv[])
 	int src_arg = parse_args_until_src(argc, argv);
 
 	// Init context
-	HOME = getenv("HOME");
 	src_file = find_path_to_src( argv[src_arg] );
 	src_type = find_src_type( argv[src_arg] );
 	cache_dir = get_cache_dir_path(src_file);
@@ -93,6 +94,9 @@ int main(int argc, char* argv[])
 	compile_src_file();
 
 	// Run the src file without forking
+	if(dont_run)
+		return 0;
+
 	Cmd run;
 	if(debug)			   // debug it with gdb
 	{
@@ -103,6 +107,7 @@ int main(int argc, char* argv[])
 	run += bin.c_str();
 	for(int i = src_arg+1; i < argc; ++i)
 		run += argv[i];
+
 	exec(run);
 }
 
@@ -125,11 +130,16 @@ int parse_args_until_src(int argc, char* argv[])
 		{
 			print_usage();
 			cout << "Compile and run C/C++ source FILE\n"
-				"Pass the ARGUMENTS to the compiled binary\n"
+				"Pass the ARGUMENT to the compiled binary\n"
 				"The binaries are cached and recompiled only if the source or it's headers have changed\n\n"
 				"Options:\n"
 				"-g debug the binary, asserts are also enabled\n"
-				"-q quicker, just compare source and binary time stamps, if included files were updated a recompile WON'T occur!\n\n"
+				"-q quicker, just compare source and binary time stamps, if included files were updated a recompile WON'T occur!\n"
+				"-n don't run, just compile the file without running it\n\n"
+
+				"Any other argument that begins with '-' is passed to the compiler e.g.:\n"
+				"    cppipe -O0 file.cpp\n\n"
+
 				"Environment variables:\n"
 				"CPPIPEPATH - ':'-separated list of directories to prepend to the FILE search path\n";
 			exit(0);
@@ -142,6 +152,14 @@ int parse_args_until_src(int argc, char* argv[])
 		{
 			quick = true;
 		}
+		else if( arg == "-n" )
+		{
+			dont_run = true;
+		}
+		else if( !arg.empty() && arg[0] == '-') // if it's an unknown option pass it to the compiler
+		{
+			additional_compiler_args.push_back(argv[i]);
+		}
 		else		// Then treat it as the src_arg
 		{
 			src_arg = i;
@@ -191,14 +209,19 @@ fs::path find_path_to_src(string_view src_file)
 fs::path get_cache_dir_path(const fs::path& src_file)
 {
 	fs::path cache_dir;
-	if(char* xdg_cache = getenv("XDG_CACHE_HOME"))
+	if(char* XDG_CACHE = getenv("XDG_CACHE_HOME"))
 	{
-		cache_dir = xdg_cache;
+		cache_dir = XDG_CACHE;
 		cache_dir /= "cppipe";
 	}
+	else if(char* HOME = getenv("HOME"))
+	{
+		cache_dir = HOME;
+		cache_dir /= ".cache/cppipe";
+	}
 	else
 	{
-		cache_dir = HOME / ".cache/cppipe";
+		cache_dir = "/var/cache/cppipe";
 	}
 	cache_dir += fs::canonical( src_file ).parent_path();
 	fs::create_directories(cache_dir);
@@ -213,6 +236,12 @@ MappedFile mapfile_for_writing(const fs::path& file)
 	res.len = lseek(fd, 0, SEEK_END);
 	res.data = (char*)mmap(nullptr, res.len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
 
+	if(res.data == (void*)-1)
+	{
+		cerr << "ERROR: Couldn't map " << file << " for writing\n";
+		exit(1);
+	}
+
 	close(fd);
 	return res;
 }
@@ -283,8 +312,10 @@ bool preprocess_and_compare()
 	// Result of preprocessing as string
 	string new_pp = read_to_end(preprocessing.out);
 
-	if( !wait(preprocessing) )	// preprocessing failed
-		exit(1);
+	// TODO: decide what to do here, #! causes inevitavble non-fatal errors
+	// maybe warn that preproccessing failed
+	// if( !wait(preprocessing) )   // preprocessing failed
+	// exit(1);
 
 	if( fs::exists(preprocessed_file) ) // todo: clean up if else blocks
 	{
@@ -349,11 +380,15 @@ void compile_src_file()
 			compile.append_args({ CXXFLAGS });
 
 
+		// Remap the debug source file since we compile from stdin
+		string debug_remap = "-fdebug-prefix-map=<stdin>=" + src_file.string();
 		if(debug)
-			compile.append_args({ DEBUG_FLAGS });
+			compile.append_args({ DEBUG_FLAGS, debug_remap.c_str() });
 		else
 			compile.append_args({ RELEASE_FLAGS });
 
+		for(const char* arg: additional_compiler_args)
+			compile += arg;
 
 		if( !compile() )	 // if failed to compile
 		{
@@ -365,7 +400,7 @@ void compile_src_file()
 
 void print_usage()
 {
-	cout << "Usage: cppipe [OPTION]... FILE [ARGUMENTS]...\n";
+	cout << "Usage: cppipe [OPTION]... FILE [ARGUMENT]...\n";
 }
 
 SrcType find_src_type(const string_view p)

test/functions_test.cppipe

@@ -25,7 +25,7 @@ int main(int argc, char* argv[])
 
 	string out1 = $(ll + "src" | grep + "inl" | grep + "child");
 	if(out1.find("childProcess.inl") != string::npos)
-		cout << "OK 0/12" << endl;
+		cout << "OK 0/13" << endl;
 
 	string out2 = $(echo + "abc" + "def");
 	// "abc def" = 7 chars, trailing newlines are stripped by $()
@@ -35,8 +35,8 @@ int main(int argc, char* argv[])
 		exit(1);
 	}
 
-	Cmd success("echo", "OK 1/12");
-	Cmd fail("mkdir", ".");
+	Cmd success("echo", "OK 1/13");
+	Cmd fail("false");
 	Cmd unexpected("echo", "FAILURE");
 	success &&
 	fail &&
@@ -47,34 +47,34 @@ int main(int argc, char* argv[])
 	// unexpected &&
 	// unexpected;
 
-	Cmd write_file("echo", "Existing ", " ", "file. OK 2/12");
+	Cmd write_file("echo", "Existing ", " ", "file. OK 2/13");
 
 	write_file > "file.txt";
 	grep + "Existing" < "file.txt";
 
-	echo + "Appended to file OK 3/12" >> "file.txt";
+	echo + "Appended to file OK 3/13" >> "file.txt";
 	grep + "Appended" < "file.txt" &&
 	rm + "file.txt" &&
 	fail ||
-	Cmd("echo", "OK 4/12");
+	Cmd("echo", "OK 4/13");
 
-	echo + "OK 5/12" &&
-	echo + "OK 6/12",
-	Cmd("echo", "OK 7/12");
+	echo + "OK 5/13" &&
+	echo + "OK 6/13",
+	Cmd("echo", "OK 7/13");
 
-	echo + "OK 8/12" &
-	echo + "OK 9/12" &&
-	echo + "OK 10/12";
+	echo + "OK 8/13" &
+	echo + "OK 9/13" &&
+	echo + "OK 10/13";
 
 	// wait for all detached
 	while(wait(nullptr) != -1);
 
 	Cmd run_OK = echo;
-	run_OK.append_args({ "OK 11/12" });
+	run_OK.append_args({ "OK 11/13" });
 	run( run_OK );
 
-	exec( echo + "OK 12/12" );
+	run({ "echo", "OK 12/13" });
 
-	// todo
-	// exec( echo + $(echo + "OK 11/12") );
+	// The temporaty string is desroyed after the statement
+	exec( echo + $(echo + "OK 13/13").c_str() );
 }

todo.txt

@@ -1,7 +1,8 @@
+many points in name - rc.local.start
 example #!/usr/bin/cppipe
 description - advantages over manual compile
 man
-tips (sigaction SIGCHILD, SIG_IGN, SIG_DFL)
+tips (sigaction SIGCHILD, SIG_IGN, SIG_DFL) condituonal main
  - redirected processes block if their output is not read
 make sure file descriptors are closed when no longer used
 cppipe compile options from tft