yeah, clap can be used without the env

Cargo.lock

@@ -304,6 +304,13 @@ dependencies = [
  "clap_derive",
 ]
 
+[[package]]
+name = "clap-repl-demo"
+version = "0.1.0"
+dependencies = [
+ "clap",
+]
+
 [[package]]
 name = "clap_builder"
 version = "4.5.7"

Cargo.toml

@@ -25,7 +25,7 @@ members = [
   "members/diesel-demo",
   "members/ptlog",
   "members/hello-world",
-  "members/statusline",
+  "members/statusline", "members/clap-repl-demo",
 ]
 default-members = [
   ".",

members/clap-repl-demo/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "clap-repl-demo"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+clap = { version = "4.5.7", features = ["derive"] }

members/clap-repl-demo/src/main.rs

@@ -0,0 +1,12 @@
+use clap::{arg, command, value_parser, ArgAction, Command};
+
+fn main() {
+    // define a command with clap builder
+    let cmdtest = Command::new("test").arg(arg!(--foo <VALUE>).required(true));
+
+    // instead of using the args that were actually given to the executable, we just insert our own
+    // vec
+    let simulated_input = vec!["test", "--foo", "5"];
+    let parsed = cmdtest.try_get_matches_from(simulated_input);
+    dbg!(&parsed);
+}