codecrafters submit [skip ci]

1 files changed, 25 insertions, 0 deletions

diff --git a/src/path.zig b/src/path.zig
new file mode 100644
index 0000000..2f52bc9
--- /dev/null
+++ b/src/path.zig
@@ -0,0 +1,25 @@
+const std = @import("std");
+
+pub fn findInPath(allocator: std.mem.Allocator, cmd_name: []const u8) !?[]const u8 {
+    const path_env = std.process.getEnvVarOwned(allocator, "PATH") catch return null;
+    defer allocator.free(path_env);
+
+    var it = std.mem.splitScalar(u8, path_env, ':');
+    while (it.next()) |dir| {
+        const full_path = std.fs.path.join(allocator, &[_][]const u8{ dir, cmd_name }) catch continue;
+        defer allocator.free(full_path);
+
+        const file = std.fs.openFileAbsolute(full_path, .{}) catch continue;
+        const stat = file.stat() catch {
+            file.close();
+            continue;
+        };
+        file.close();
+
+        if ((stat.mode & 0o111) == 0) continue;
+
+        return try allocator.dupe(u8, full_path);
+    }
+
+    return null;
+}