start aft-ls

1 files changed, 36 insertions, 0 deletions

diff --git a/src/bin/aft-ls.rs b/src/bin/aft-ls.rs
new file mode 100644
index 0000000..3118c08
--- /dev/null
+++ b/src/bin/aft-ls.rs
@@ -0,0 +1,36 @@
+
+use std::{fs,env,path};
+use std::error::Error;
+use std::os::unix::fs::MetadataExt;
+
+fn main() -> Result<(), Box<dyn Error>> {
+
+    let args: Vec<String> = env::args().collect();
+    let dir = match args.len() {
+        0 | 1 => path::Path::new("."),
+        _other => path::Path::new(&args[2]),
+    };
+
+    // header is basically a constant
+    print!("\x01");
+    println!("{}\x1D", ["file_name", "size", "mtime"].join("\x1E"));
+    println!("{}\x1D", ["string", "integer+bytes", "datetime"].join("\x1E"));
+    print!("\x02");
+
+    for entry in fs::read_dir(dir)? {
+            let entry = entry?;
+            let metadata = entry.metadata()?;
+            let filename: String = entry.file_name()
+                .into_string()
+                .or_else(|_| Err(format!("Invalid entry")))?;
+            let mtime = chrono::DateTime::<chrono::Utc>::from_utc(
+                chrono::NaiveDateTime::from_timestamp(metadata.mtime(), 0), chrono::Utc);
+            println!("{}\x1D",
+                [
+                 filename,
+                 metadata.size().to_string(),
+                 mtime.to_rfc3339_opts(chrono::SecondsFormat::AutoSi, true),
+                ].join("\x1E"));
+    }
+    Ok(())
+}