docs: add some help to command line handling

Sponsored-by: author

1 files changed, 6 insertions, 0 deletions

diff --git a/src/bin/obnam-benchmark.rs b/src/bin/obnam-benchmark.rs
index b76a7aa..3c2060e 100644
--- a/src/bin/obnam-benchmark.rs
+++ b/src/bin/obnam-benchmark.rs
@@ -30,12 +30,16 @@ struct Opt {
 
 #[derive(Debug, StructOpt)]
 enum Command {
+    /// Run benchmarks
     Run(Run),
+
+    /// Dump the specification as JSON
     Spec(Spec),
 }
 
 #[derive(Debug, StructOpt)]
 struct Run {
+    /// Name of the specification file
     #[structopt(parse(from_os_str))]
     spec: PathBuf,
 }
@@ -52,9 +56,11 @@ impl Run {
 
 #[derive(Debug, StructOpt)]
 struct Spec {
+    /// Name of the specification file
     #[structopt(parse(from_os_str))]
     spec: PathBuf,
 
+    /// Name of JSON file to write
     #[structopt(long, parse(from_os_str))]
     output: PathBuf,
 }