From cc85cdec78976ceca5b0bbe0e2510b65df8c32ce Mon Sep 17 00:00:00 2001
From: Alexander Zhirov <azhirov@uveon.ru>
Date: Mon, 26 May 2025 03:09:15 +0300
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
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---
 source/app.d          | 8 +++++++-
 source/snag/lib/lib.d | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/source/app.d b/source/app.d
index 26110bb..55f9e4a 100644
--- a/source/app.d
+++ b/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 =>
diff --git a/source/snag/lib/lib.d b/source/snag/lib/lib.d
index 3277d0e..902691d 100644
--- a/source/snag/lib/lib.d
+++ b/source/snag/lib/lib.d
@@ -1,6 +1,7 @@
 module snag.lib.lib;
 
 import std.regex;
+import std.process;
 
 bool isValidHash(string hash) {
 	auto hashPattern = ctRegex!r"^[a-fA-F0-9]{7}$";
@@ -11,3 +12,8 @@ bool isValidEmail(string email) {
 	auto emailPattern = ctRegex!r"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$";
 	return !matchFirst(email, emailPattern).empty;
 }
+
+bool checkGit() {
+	auto result = execute(["which", "git"]);
+	return !result.status;
+}