Add command line parsing

Closes #6

.gitignore

@@ -9,3 +9,4 @@ bin/
 test/
 build/
 .lvimrc
+config-debug

include/config.h

@@ -46,7 +46,7 @@ struct sway_config {
 	int gaps_outer;
 };
 
-bool load_config(void);
+bool load_config(const char *file);
 bool read_config(FILE *file, bool is_active);
 char *do_var_replacement(struct sway_config *config, char *str);
 

sway/commands.c

@@ -414,7 +414,7 @@ static bool cmd_reload(struct sway_config *config, int argc, char **argv) {
 	if (!checkarg(argc, "reload", EXPECTED_EQUAL_TO, 0)) {
 		return false;
 	}
-	if (!load_config()) {
+	if (!load_config(NULL)) { // TODO: Use config given from -c
 		return false;
 	}
 	arrange_windows(&root_container, -1, -1);

sway/config.c

@@ -144,10 +144,15 @@ _continue:
 	return test;
 }
 
-bool load_config(void) {
+bool load_config(const char *file) {
 	sway_log(L_INFO, "Loading config");
 
-	char *path = get_config_path();
+	char *path;
+	if (file != NULL) {
+		path = strdup(file);
+	} else {
+		path = get_config_path();
+	}
 
 	if (path == NULL) {
 		sway_log(L_ERROR, "Unable to find a config file!");

sway/main.c

@@ -4,6 +4,7 @@
 #include <wlc/wlc.h>
 #include <sys/wait.h>
 #include <signal.h>
+#include <getopt.h>
 #include "layout.h"
 #include "config.h"
 #include "log.h"
@@ -12,23 +13,96 @@
 static void sigchld_handle(int signal);
 
 int main(int argc, char **argv) {
+	static int verbose = 0, debug = 0, validate = 0;
+
+	static struct option long_options[] = {
+		{"config", required_argument, NULL, 'c'},
+		{"validate", no_argument, &validate, 1},
+		{"debug", no_argument, &debug, 1},
+		{"version", no_argument, NULL, 'v'},
+		{"verbose", no_argument, &verbose, 1},
+		{"get-socketpath", no_argument, NULL, 'p'},
+	};
+
 	/* Signal handling */
 	signal(SIGCHLD, sigchld_handle);
 
 	setenv("WLC_DIM", "0", 0);
+
+	FILE *devnull = fopen("/dev/null", "w");
+	if (devnull) {
+		// NOTE: Does not work, see wlc issue #54
+		wlc_set_log_file(devnull);
+	}
+
 	/* Changing code earlier than this point requires detailed review */
 	if (!wlc_init(&interface, argc, argv)) {
 		return 1;
 	}
 
-	init_log(L_DEBUG); // TODO: Control this with command line arg
+	char *config_path = NULL;
+
+	int c;
+	while (1) {
+		int option_index = 0;
+		c = getopt_long(argc, argv, "CdvVpc:", long_options, &option_index);
+		if (c == -1) {
+			break;
+		}
+		switch (c) {
+		case 0: // Flag
+			break;
+		case 'c': // config
+			config_path = strdup(optarg);
+			break;
+		case 'C': // validate
+			validate = 1;
+			break;
+		case 'd': // debug
+			debug = 1;
+			break;
+		case 'v': // version
+			// todo
+			exit(0);
+			break;
+		case 'V': // verbose
+			verbose = 1;
+			break;
+		case 'p': // --get-socketpath
+			// TODO
+			break;
+		}
+	}
+
+	if (debug) {
+		init_log(L_DEBUG);
+		wlc_set_log_file(stderr);
+		fclose(devnull);
+		devnull = NULL;
+	} else if (verbose || validate) {
+		init_log(L_INFO);
+	} else {
+		init_log(L_ERROR);
+	}
+
+	if (validate) {
+		bool valid = load_config(config_path);
+		return valid ? 0 : 1;
+	}
+
 	init_layout();
 
-	if (!load_config()) {
+	if (!load_config(config_path)) {
 		sway_log(L_ERROR, "Error(s) loading config!");
 	}
+	if (config_path) {
+		free(config_path);
+	}
 
 	wlc_run();
+	if (devnull) {
+		fclose(devnull);
+	}
 
 	return 0;
 }