udp: only include prometheus fields in config if feature enabled

aquatic_udp/src/config.rs

@@ -1,6 +1,7 @@
 use std::{net::SocketAddr, path::PathBuf};
 
 use aquatic_common::{access_list::AccessListConfig, privileges::PrivilegeConfig};
+use cfg_if::cfg_if;
 use serde::Deserialize;
 
 use aquatic_common::cli::LogLevel;
@@ -154,15 +155,25 @@ pub struct StatisticsConfig {
     /// Path to save HTML file to
     pub html_file_path: PathBuf,
     /// Run a prometheus endpoint
+    #[cfg(feature = "prometheus")]
     pub run_prometheus_endpoint: bool,
     /// Address to run prometheus endpoint on
+    #[cfg(feature = "prometheus")]
     pub prometheus_endpoint_address: SocketAddr,
 }
 
 impl StatisticsConfig {
+    cfg_if! {
+        if #[cfg(feature = "prometheus")] {
             pub fn active(&self) -> bool {
-        (self.interval != 0)
+                (self.interval != 0) &
-            & (self.print_to_stdout | self.write_html_to_file | self.run_prometheus_endpoint)
+                    (self.print_to_stdout | self.write_html_to_file | self.run_prometheus_endpoint)
+            }
+        } else {
+            pub fn active(&self) -> bool {
+                (self.interval != 0) & (self.print_to_stdout | self.write_html_to_file)
+            }
+        }
     }
 }
 
@@ -174,7 +185,9 @@ impl Default for StatisticsConfig {
             print_to_stdout: false,
             write_html_to_file: false,
             html_file_path: "tmp/statistics.html".into(),
+            #[cfg(feature = "prometheus")]
             run_prometheus_endpoint: false,
+            #[cfg(feature = "prometheus")]
             prometheus_endpoint_address: SocketAddr::from(([0, 0, 0, 0], 9000)),
         }
     }

aquatic_udp/src/workers/statistics/collector.rs

@@ -14,16 +14,18 @@ pub struct StatisticsCollector {
     last_update: Instant,
     pending_histograms: Vec<Histogram<u64>>,
     last_complete_histogram: PeerHistogramStatistics,
+    #[cfg(feature = "prometheus")]
     ip_version: String,
 }
 
 impl StatisticsCollector {
-    pub fn new(shared: Arc<Statistics>, ip_version: String) -> Self {
+    pub fn new(shared: Arc<Statistics>, #[cfg(feature = "prometheus")] ip_version: String) -> Self {
         Self {
             shared,
             last_update: Instant::now(),
             pending_histograms: Vec::new(),
             last_complete_histogram: Default::default(),
+            #[cfg(feature = "prometheus")]
             ip_version,
         }
     }
@@ -37,7 +39,10 @@ impl StatisticsCollector {
         }
     }
 
-    pub fn collect_from_shared(&mut self, config: &Config) -> CollectedStatistics {
+    pub fn collect_from_shared(
+        &mut self,
+        #[cfg(feature = "prometheus")] config: &Config,
+    ) -> CollectedStatistics {
         let requests_received = Self::fetch_and_reset(&self.shared.requests_received);
         let responses_sent_connect = Self::fetch_and_reset(&self.shared.responses_sent_connect);
         let responses_sent_announce = Self::fetch_and_reset(&self.shared.responses_sent_announce);

aquatic_udp/src/workers/statistics/mod.rs

@@ -57,8 +57,16 @@ pub fn run_statistics_worker(
         None
     };
 
-    let mut ipv4_collector = StatisticsCollector::new(shared_state.statistics_ipv4, "4".into());
+    let mut ipv4_collector = StatisticsCollector::new(
-    let mut ipv6_collector = StatisticsCollector::new(shared_state.statistics_ipv6, "6".into());
+        shared_state.statistics_ipv4,
+        #[cfg(feature = "prometheus")]
+        "4".into(),
+    );
+    let mut ipv6_collector = StatisticsCollector::new(
+        shared_state.statistics_ipv6,
+        #[cfg(feature = "prometheus")]
+        "6".into(),
+    );
 
     loop {
         ::std::thread::sleep(Duration::from_secs(config.statistics.interval));
@@ -70,8 +78,14 @@ pub fn run_statistics_worker(
             }
         }
 
-        let statistics_ipv4 = ipv4_collector.collect_from_shared(&config);
+        let statistics_ipv4 = ipv4_collector.collect_from_shared(
-        let statistics_ipv6 = ipv6_collector.collect_from_shared(&config);
+            #[cfg(feature = "prometheus")]
+            &config,
+        );
+        let statistics_ipv6 = ipv6_collector.collect_from_shared(
+            #[cfg(feature = "prometheus")]
+            &config,
+        );
 
         if config.statistics.print_to_stdout {
             println!("General:");