1 files changed, 16 insertions, 4 deletions
diff --git a/src/bin/summain.rs b/src/bin/summain.rs
index 58d8788..9365243 100644
--- a/src/bin/summain.rs
+++ b/src/bin/summain.rs
@@ -1,12 +1,17 @@
 use anyhow::Context;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use structopt::StructOpt;
 use summain::ManifestEntry;
+use walkdir::WalkDir;
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
-    let mut opt = Opt::from_args();
-    opt.pathnames[..].sort();
+    let opt = Opt::from_args();
+    let mut files = vec![];
+    for pathname in opt.pathnames {
+        find(&pathname, &mut files)?;
+    }
+    files.sort();
 
     // Get metadata about all files, but don't compute checksum yet.
     //
@@ -18,7 +23,7 @@ async fn main() -> anyhow::Result<()> {
     // large: Linux only allows 128 KiB of command line arguments.
 
     let mut handles = vec![];
-    for filename in opt.pathnames.iter().cloned() {
+    for filename in files.iter().cloned() {
         handles.push(tokio::spawn(async move { manifest(filename).await }));
     }
 
@@ -49,6 +54,13 @@ async fn main() -> anyhow::Result<()> {
     Ok(())
 }
 
+fn find(root: &Path, files: &mut Vec<PathBuf>) -> anyhow::Result<()> {
+    for e in WalkDir::new(root) {
+        files.push(e?.path().to_path_buf());
+    }
+    Ok(())
+}
+
 #[derive(StructOpt, Debug)]
 struct Opt {
     #[structopt(parse(from_os_str))]