From 1ad351497b25f81f8e3a3a321334a86d320f3841 Mon Sep 17 00:00:00 2001
From: Louis Merlin <louis@srlabs.de>
Date: Thu, 5 Dec 2024 15:52:49 +0100
Subject: [PATCH] Add error if minimized corpus exists

---
 src/bin/cargo-ziggy/minimize.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/bin/cargo-ziggy/minimize.rs b/src/bin/cargo-ziggy/minimize.rs
index b9d7a7c..4bf2321 100644
--- a/src/bin/cargo-ziggy/minimize.rs
+++ b/src/bin/cargo-ziggy/minimize.rs
@@ -1,5 +1,5 @@
 use crate::{find_target, Build, FuzzingEngines, Minimize};
-use anyhow::{Context, Result};
+use anyhow::{anyhow, Context, Result};
 use std::{
     env,
     fs::{self, File},
@@ -20,6 +20,10 @@ impl Minimize {
         self.target =
             find_target(&self.target).context("⚠️  couldn't find target when minimizing")?;
 
+        if fs::read_dir(self.output_corpus()).is_ok() {
+            return Err(anyhow!("Directory {} exists, please move it before running minimization", self.output_corpus()));
+        }
+
         let entries = fs::read_dir(self.input_corpus())?;
         let original_count = entries.filter_map(|entry| entry.ok()).count();
         println!("Running minimization on a corpus of {original_count} files");