Add ability to build nix derivations

Signed-off-by: Marcel Müller <neikos@neikos.email>

nix-json/src/helpers.rs

@@ -17,7 +17,7 @@ pub enum LogBuildState {
 #[derive(Debug)]
 pub struct LogBuildStatus {
     state: LogBuildState,
-    store_path: String,
+    derivation_path: String,
     log_lines: Vec<String>,
 }
 
@@ -29,6 +29,14 @@ impl LogBuildStatus {
     pub fn log_lines(&self) -> &[String] {
         &self.log_lines
     }
+
+    pub fn derivation_path(&self) -> &str {
+        &self.derivation_path
+    }
+
+    pub fn is_success(&self) -> bool {
+        self.state == LogBuildState::Succeeded
+    }
 }
 
 /// Accumulated build status of different nix-builds
@@ -109,7 +117,10 @@ impl NixBuildState {
                     nix_log_start_action.id,
                     LogBuildStatus {
                         state: LogBuildState::Started,
-                        store_path: nix_log_start_action.fields[0].as_str().unwrap().to_string(),
+                        derivation_path: nix_log_start_action.fields[0]
+                            .as_str()
+                            .unwrap()
+                            .to_string(),
                         log_lines: vec![],
                     },
                 );
@@ -171,13 +182,17 @@ impl NixBuildState {
 
     fn handle_log_action(
         &self,
-        nix_log_msg_action: crate::NixLogMsgAction,
+        _nix_log_msg_action: crate::NixLogMsgAction,
     ) -> Option<NixBuildEvent> {
         None
     }
 
     pub fn get_derivation(&self, drv: &str) -> Option<&LogBuildStatus> {
-        self.builds.values().find(|b| b.store_path == drv)
+        self.builds.values().find(|b| b.derivation_path == drv)
+    }
+
+    pub fn derivations(&self) -> impl Iterator<Item = &LogBuildStatus> {
+        self.builds.values()
     }
 }