Добавлена проверка на наличие установленного git в системе

source/app.d

@@ -1,6 +1,7 @@
 import snag;
 import commandr;
 import std.file;
+import std.stdio : writeln;
 
 import core.stdc.stdlib : EXIT_SUCCESS, EXIT_FAILURE;
 
@@ -8,6 +9,11 @@ private string programName = "snag";
 
 int main(string[] args)
 {
+	if (!checkGit()) {
+		"Using snag requires Git to be installed".writeln;
+		return EXIT_FAILURE;
+	}
+
 	auto argumets = new Program(programName, snagVersion)
 		.add(new Command("init", "Initializing the repository for storing snapshots"))
 		.add(new Command("status", "Checking the status of tracked files"))
@@ -83,7 +89,7 @@ int main(string[] args)
 	}
 
 	auto snag = new Snag(config);
-	import std.stdio;
+
 	try {
 		argumets
 			.on("init", init =>