add help text

3 files changed, 39 insertions, 1 deletions

diff --git a/readme.md b/readme.md
index da6c0e2..48a59ff 100644
--- a/readme.md
+++ b/readme.md
@@ -8,3 +8,19 @@
 $ crate2nix generate
 $ nix-build
 ```
+
+### usage
+
+```
+Usage
+-----
+
+hedge [-h | --help] [--port <number>] [--database <path>]
+
+Options
+-------
+
+    -h, --help       Prints help information
+        --port       Port to start the server on (default: 3000)
+        --database   Path to database (default: urls.db_3)
+```
diff --git a/src/cli.rs b/src/cli.rs
index 009397d..e0b745d 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -5,6 +5,7 @@ use std::default::Default;
 use std::path::PathBuf;
 
 pub struct Config {
+    pub help: bool,
     pub port: u16,
     pub db_path: PathBuf,
 }
@@ -12,6 +13,7 @@ pub struct Config {
 impl Default for Config {
     fn default() -> Self {
         Config {
+            help: false,
             port: 3000,
             db_path: "./urls.db_3".into(),
         }
@@ -22,9 +24,24 @@ lazy_static! {
     pub static ref CONFIG: Config = parse_args().unwrap_or(Default::default());
 }
 
+pub static HELP_TEXT: &'static str = "
+Usage
+-----
+
+hedge [-h | --help] [--port <number>] [--database <path>]
+
+Options
+-------
+
+    -h, --help       Prints help information
+        --port       Port to start the server on (default: 3000)
+        --database   Path to database (default: urls.db_3)
+";
+
 fn parse_args() -> Result<Config> {
     let mut _a = pico_args::Arguments::from_env();
     return Ok(Config {
+        help: _a.contains(["-h", "--help"]),
         port: _a
             .opt_value_from_fn("--port", str::parse::<u16>)?
             .unwrap_or(7878),
diff --git a/src/main.rs b/src/main.rs
index 5cd3492..c1e3268 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,11 +12,16 @@ mod service;
 use service::shortner_service;
 
 mod cli;
-use cli::CONFIG;
+use cli::{CONFIG, HELP_TEXT};
 
 fn main() -> Result<()> {
     pretty_env_logger::init();
 
+    if CONFIG.help {
+        println!("{}", HELP_TEXT);
+        return Ok(());
+    }
+
     init_db(&CONFIG.db_path)?;
     smol::run(async {
         let addr = ([127, 0, 0, 1], CONFIG.port).into();