1 files changed, 6 insertions, 2 deletions
diff --git a/src/bin/subplot.rs b/src/bin/subplot.rs
index 907e616..8ede58d 100644
--- a/src/bin/subplot.rs
+++ b/src/bin/subplot.rs
@@ -278,7 +278,8 @@ impl Docgen {
         } else if let Some(date) = doc.meta().date() {
             date.to_string()
         } else {
-            Self::mtime_formatted(Self::mtime(doc.meta().markdown_filename())?)
+            let filename = doc.meta().basedir().join(doc.meta().markdown_filename());
+            Self::mtime_formatted(Self::mtime(&filename)?)
         };
         pandoc.add_option(pandoc::PandocOption::Meta("date".to_string(), Some(date)));
         pandoc.add_option(pandoc::PandocOption::TableOfContents);
@@ -308,7 +309,10 @@ impl Docgen {
     }
 
     fn mtime(filename: &Path) -> Result<(u64, u32)> {
-        let mtime = fs::metadata(filename)?.modified()?;
+        let mtime = fs::metadata(filename)
+            .map_err(|e| SubplotError::InputFileUnreadable(filename.into(), e))?
+            .modified()
+            .map_err(|e| SubplotError::InputFileMtime(filename.into(), e))?;
         let mtime = mtime.duration_since(UNIX_EPOCH)?;
         Ok((mtime.as_secs(), mtime.subsec_nanos()))
     }