Protect companion manifests from overwrite

1 files changed, 4 insertions, 0 deletions

diff --git a/src/build.rs b/src/build.rs
index 42c57ef..fcacfc0 100644
--- a/src/build.rs
+++ b/src/build.rs
@@ -42,6 +42,10 @@ impl<I: PackageInstaller, B: InitramfsBuilder> BuildExecutor<I, B> {
         if artifact.exists() {
             bail!("output artifact already exists; refusing to overwrite it: {}", artifact.display());
         }
+        let manifest = ArtifactManifest::path_beside(artifact)?;
+        if manifest.exists() {
+            bail!("output manifest already exists; refusing to overwrite it: {}", manifest.display());
+        }
         let parent = artifact
             .parent()
             .filter(|parent| !parent.as_os_str().is_empty())