subplotlib: path_exists - check path is a directory

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/subplotlib/src/steplibrary/files.rs b/subplotlib/src/steplibrary/files.rs
index 8ba27cf..169111d 100644
--- a/subplotlib/src/steplibrary/files.rs
+++ b/subplotlib/src/steplibrary/files.rs
@@ -269,7 +269,12 @@ pub fn remove_directory(context: &Datadir, path: &str) {
 #[step]
 pub fn path_exists(context: &Datadir, path: &str) {
     let full_path = context.canonicalise_filename(path)?;
-    fs::metadata(full_path)?;
+    if !fs::metadata(&full_path)?.is_dir() {
+        throw!(format!(
+            "{} exists but is not a directory",
+            full_path.display()
+        ))
+    }
 }
 
 #[step]