Use envy to parse environment variables for Config

This patch uses the envy crate to parse the environment.  A variable
NITROCLI_KEY can be used to overwrite the configuration for *key*.  This
has the side effect that the NITROCLI_NO_CACHE variable is evaluated as
a boolean variable (instead of only checking whether it is set).  We
also accept two new variables, NITROCLI_MODEL and NITROCLI_VERBOSITY.

1 files changed, 1 insertions, 6 deletions

diff --git a/src/main.rs b/src/main.rs
index 3535a91..b53358e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -84,7 +84,6 @@ const NITROCLI_USER_PIN: &str = "NITROCLI_USER_PIN";
 const NITROCLI_NEW_ADMIN_PIN: &str = "NITROCLI_NEW_ADMIN_PIN";
 const NITROCLI_NEW_USER_PIN: &str = "NITROCLI_NEW_USER_PIN";
 const NITROCLI_PASSWORD: &str = "NITROCLI_PASSWORD";
-const NITROCLI_NO_CACHE: &str = "NITROCLI_NO_CACHE";
 
 trait Stdio {
   fn stdio(&mut self) -> (&mut dyn io::Write, &mut dyn io::Write);
@@ -206,11 +205,7 @@ fn main() {
   let mut stderr = io::stderr();
 
   let rc = match config::Config::load() {
-    Ok(mut config) => {
-      if env::var_os(NITROCLI_NO_CACHE).is_some() {
-        config.no_cache = true;
-      }
-
+    Ok(config) => {
       let args = env::args().collect::<Vec<_>>();
       let ctx = &mut RunCtx {
         stdout: &mut stdout,