1 files changed, 62 insertions, 0 deletions
diff --git a/src/meta/inode.rs b/src/meta/inode.rs
new file mode 100644
index 0000000..6849947
--- /dev/null
+++ b/src/meta/inode.rs
@@ -0,0 +1,62 @@
+use crate::color::{ColoredString, Colors, Elem};
+use std::fs::Metadata;
+
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+pub struct INode {
+    index: Option<u64>,
+}
+
+impl<'a> From<&'a Metadata> for INode {
+    #[cfg(unix)]
+    fn from(meta: &Metadata) -> Self {
+        use std::os::unix::fs::MetadataExt;
+
+        let index = meta.ino();
+
+        Self { index: Some(index) }
+    }
+
+    #[cfg(windows)]
+    fn from(_: &Metadata) -> Self {
+        Self { index: None }
+    }
+}
+
+impl INode {
+    pub fn render(&self, colors: &Colors) -> ColoredString {
+        match self.index {
+            Some(i) => colors.colorize(i.to_string(), &Elem::INode { valid: true }),
+            None => colors.colorize(String::from("-"), &Elem::INode { valid: false }),
+        }
+    }
+}
+
+#[cfg(test)]
+#[cfg(unix)]
+mod tests {
+    use super::INode;
+    use std::env;
+    use std::io;
+    use std::path::Path;
+    use std::process::{Command, ExitStatus};
+
+    fn cross_platform_touch(path: &Path) -> io::Result<ExitStatus> {
+        Command::new("touch").arg(&path).status()
+    }
+
+    #[test]
+    fn test_inode_no_zero() {
+        let mut file_path = env::temp_dir();
+        file_path.push("inode.tmp");
+
+        let success = cross_platform_touch(&file_path).unwrap().success();
+        assert!(success, "failed to exec touch");
+
+        let inode = INode::from(&file_path.metadata().unwrap());
+
+        #[cfg(unix)]
+        assert!(inode.index.is_some());
+        #[cfg(windows)]
+        assert!(inode.index.is_none());
+    }
+}