refact: remove virtual package

src/env.rs

@@ -0,0 +1,25 @@
+use std::env::var;
+
+use anyhow::{anyhow, Result};
+
+pub fn get_editor() -> Result<String> {
+    check_vars_in_order(&["EDITOR", "VISUAL"]).ok_or_else(|| anyhow!("could not find editor"))
+}
+
+fn check_vars_in_order(vars: &[&str]) -> Option<String> {
+    vars.iter().find_map(|v| var(v).ok())
+}
+
+fn get_single_var(variable: &str) -> Option<String> {
+    var(variable).ok()
+}
+
+/// Determine if debug information should be printed. Will return `true` if RUST_BACKTRACE equals
+/// "s" or "full".
+pub fn should_print_debug_info() -> bool {
+    match get_single_var("RUST_BACKTRACE") {
+        Some(value) if ["s", "full"].contains(&value.as_str()) => true,
+        Some(_) => false,
+        None => false,
+    }
+}