Rust: avoid cli flag defaults overriding env settings

Author: Paolo Tranquilli

rust/extractor/macros/src/lib.rs

@@ -17,13 +17,15 @@ pub fn extractor_cli_config(_attr: TokenStream, item: TokenStream) -> TokenStrea
                 if p.path.is_ident(&format_ident!("bool")) {
                     return quote! {
                         #[arg(long)]
+                        #[serde(skip_serializing_if="<&bool>::not")]
                         #id: bool,
                     };
                 }
             }
             if id == &format_ident!("verbose") {
                 quote! {
                     #[arg(long, short, action=clap::ArgAction::Count)]
+                    #[serde(skip_serializing_if="u8::is_zero")]
                     #id: u8,
                 }
             } else if id == &format_ident!("inputs") {

rust/extractor/src/config.rs

@@ -5,8 +5,10 @@ use figment::{
     providers::{Env, Serialized},
     Figment,
 };
+use num_traits::Zero;
 use rust_extractor_macros::extractor_cli_config;
 use serde::{Deserialize, Serialize};
+use std::ops::Not;
 use std::path::PathBuf;
 
 #[derive(Debug, PartialEq, Eq, Default, Serialize, Deserialize, Clone, Copy, clap::ValueEnum)]