Add `-h` argument

Print usage on `-h` and `--help`.

Store the usage brief on `Config` in order to be able to print it from
multiple places.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/bin/git-sugpatch.rs b/src/bin/git-sugpatch.rs
index c8fc0a8..10499e9 100644
--- a/src/bin/git-sugpatch.rs
+++ b/src/bin/git-sugpatch.rs
@@ -10,7 +10,10 @@ use github_suggestion_cli::config::Config;
 fn main() {
     let args: Vec<_> = env::args().collect();
 
-    let config = match Config::get(&args) {
+    let config = match Config::get(
+        &args,
+        "usage: git sugpatch [options] <suggestion>...",
+    ) {
         Ok(c) => c,
         Err(e) => {
             gseprintln!(e);
@@ -20,10 +23,7 @@ fn main() {
     };
 
     if config.suggestions.is_empty() {
-        print!(
-            "{}",
-            config.usage("usage: git sugpatch [options] <suggestion>..."),
-        );
+        config.print_usage();
 
         process::exit(exitcode::USAGE);
     }