Add list --json option

Cargo.lock

@@ -30,6 +30,7 @@ dependencies = [
  "anyhow",
  "clap",
  "serde",
+ "serde_json",
  "ureq",
 ]
 

Cargo.toml

@@ -10,4 +10,5 @@ edition = "2018"
 anyhow = "1.0.41"
 clap = "3.0.0-beta.2"
 serde = { version = "1.0.126", features = ["derive"] }
+serde_json = "1.0.64"
 ureq = { version = "2.1.1", features = ["json"] }

src/main.rs

@@ -13,6 +13,12 @@ struct Opts {
     command: Command,
 }
 
+#[derive(Clap, Debug)]
+struct ListOpts {
+    #[clap(short, long)]
+    json: bool,
+}
+
 #[derive(Clap, Debug)]
 struct GetConfigOpts {
     location: String,
@@ -22,7 +28,7 @@ struct GetConfigOpts {
 
 #[derive(Clap, Debug)]
 enum Command {
-    List,
+    List(ListOpts),
     GetConfig(GetConfigOpts),
 }
 
@@ -67,16 +73,20 @@ struct WireguardKeyPair {
 
 fn main() -> Result<(), anyhow::Error> {
     let opts = Opts::parse();
-    match opts.command {
+    match &opts.command {
-        Command::List => list()?,
+        Command::List(list_opts) => list(&list_opts)?,
         Command::GetConfig(get_config_opts) => get_config(&get_config_opts)?,
     }
     Ok(())
 }
 
-fn list() -> Result<(), anyhow::Error> {
+fn list(opts: &ListOpts) -> Result<(), anyhow::Error> {
     let locations: Locations = get_locations()?;
+    if opts.json {
+        println!("{}", serde_json::to_string(&locations)?);
+    } else {
         println!("{:?}", &locations);
+    }
     Ok(())
 }