refactor: rename NixOptions to NixFlags

This helps differentiate in the code Nix's `--option` and other CLI
flags (previously referred to as options).

src/command/apply_local.rs

@@ -105,7 +105,7 @@ pub async fn run(_global_args: &ArgMatches, local_args: &ArgMatches) -> Result<(
 
     let target = {
         if let Some(info) = hive.deployment_info_single(&hostname).await.unwrap() {
-            let nix_options = hive.nix_options_with_builders().await.unwrap();
+            let nix_options = hive.nix_flags_with_builders().await.unwrap();
             if !info.allows_local_deployment() {
                 log::error!(
                     "Local deployment is not enabled for host {}.",

src/nix/deployment/mod.rs

@@ -18,7 +18,7 @@ use futures::future::join_all;
 use itertools::Itertools;
 use tokio_stream::StreamExt;
 
-use super::NixOptions;
+use super::NixFlags;
 use crate::job::{JobHandle, JobMonitor, JobState, JobType};
 use crate::progress::Sender as ProgressSender;
 use crate::util;
@@ -50,7 +50,7 @@ pub struct Deployment {
     options: Options,
 
     /// Options passed to Nix invocations.
-    nix_options: NixOptions,
+    nix_options: NixFlags,
 
     /// Handle to send messages to the ProgressOutput.
     progress: Option<ProgressSender>,
@@ -103,7 +103,7 @@ impl Deployment {
             hive,
             goal,
             options: Options::default(),
-            nix_options: NixOptions::default(),
+            nix_options: NixFlags::default(),
             progress,
             targets,
             parallelism_limit: ParallelismLimit::default(),
@@ -129,7 +129,7 @@ impl Deployment {
             monitor.set_label_width(width);
         }
 
-        let nix_options = self.hive.nix_options_with_builders().await?;
+        let nix_options = self.hive.nix_flags_with_builders().await?;
         self.nix_options = nix_options;
 
         if self.goal == Goal::UploadKeys {
@@ -250,7 +250,7 @@ impl Deployment {
                 evaluator.set_job(job.clone());
 
                 // FIXME: nix-eval-jobs currently does not support IFD with builders
-                let options = self.hive.nix_options();
+                let options = self.hive.nix_flags();
                 let mut stream = evaluator.evaluate(&expr, options).await?;
 
                 let mut futures: Vec<tokio::task::JoinHandle<ColmenaResult<()>>> = Vec::new();

src/nix/evaluator/mod.rs

@@ -17,7 +17,7 @@ use std::result::Result as StdResult;
 use async_trait::async_trait;
 use futures::Stream;
 
-use super::{BuildResult, NixExpression, NixOptions, StoreDerivation, StorePath};
+use super::{BuildResult, NixExpression, NixFlags, StoreDerivation, StorePath};
 use crate::error::{ColmenaError, ColmenaResult};
 use crate::job::JobHandle;
 
@@ -61,7 +61,7 @@ pub trait DrvSetEvaluator {
     async fn evaluate(
         &self,
         expression: &dyn NixExpression,
-        options: NixOptions,
+        flags: NixFlags,
     ) -> ColmenaResult<Pin<Box<dyn Stream<Item = EvalResult>>>>;
 
     /// Sets the maximum number of attributes to evaluate at the same time.

src/nix/evaluator/nix_eval_jobs.rs

@@ -19,7 +19,7 @@ use tokio::process::Command;
 use super::{AttributeError, AttributeOutput, DrvSetEvaluator, EvalError, EvalResult};
 use crate::error::{ColmenaError, ColmenaResult};
 use crate::job::{null_job_handle, JobHandle};
-use crate::nix::{NixExpression, NixOptions, StorePath};
+use crate::nix::{NixExpression, NixFlags, StorePath};
 use crate::util::capture_stream;
 
 /// The pinned nix-eval-jobs binary.
@@ -74,7 +74,7 @@ impl DrvSetEvaluator for NixEvalJobs {
     async fn evaluate(
         &self,
         expression: &dyn NixExpression,
-        options: NixOptions,
+        flags: NixFlags,
     ) -> ColmenaResult<Pin<Box<dyn Stream<Item = EvalResult>>>> {
         let mut command = Command::new(&self.executable);
         command
@@ -82,7 +82,7 @@ impl DrvSetEvaluator for NixEvalJobs {
             .arg(self.workers.to_string())
             .args(&["--expr", &expression.expression()]);
 
-        command.args(options.to_args());
+        command.args(flags.to_args());
 
         if expression.requires_flakes() {
             command.args(&["--extra-experimental-features", "flakes"]);
@@ -235,7 +235,7 @@ mod tests {
 
         block_on(async move {
             let mut stream = evaluator
-                .evaluate(&expr, NixOptions::default())
+                .evaluate(&expr, NixFlags::default())
                 .await
                 .unwrap();
             let mut count = 0;
@@ -259,7 +259,7 @@ mod tests {
 
         block_on(async move {
             let mut stream = evaluator
-                .evaluate(&expr, NixOptions::default())
+                .evaluate(&expr, NixFlags::default())
                 .await
                 .unwrap();
             let mut count = 0;
@@ -283,7 +283,7 @@ mod tests {
 
         block_on(async move {
             let mut stream = evaluator
-                .evaluate(&expr, NixOptions::default())
+                .evaluate(&expr, NixFlags::default())
                 .await
                 .unwrap();
             let mut count = 0;
@@ -323,7 +323,7 @@ mod tests {
 
         block_on(async move {
             let mut stream = evaluator
-                .evaluate(&expr, NixOptions::default())
+                .evaluate(&expr, NixFlags::default())
                 .await
                 .unwrap();
             let mut count = 0;

src/nix/hive/mod.rs

@@ -13,7 +13,7 @@ use validator::Validate;
 
 use super::deployment::TargetNode;
 use super::{
-    Flake, MetaConfig, NixExpression, NixOptions, NodeConfig, NodeFilter, NodeName,
+    Flake, MetaConfig, NixExpression, NixFlags, NodeConfig, NodeFilter, NodeName,
     ProfileDerivation, SerializedNixExpression, StorePath,
 };
 use crate::error::ColmenaResult;
@@ -140,25 +140,25 @@ impl Hive {
     }
 
     /// Returns Nix options to set for this Hive.
-    pub fn nix_options(&self) -> NixOptions {
+    pub fn nix_flags(&self) -> NixFlags {
-        let mut options = NixOptions::default();
+        let mut flags = NixFlags::default();
-        options.set_show_trace(self.show_trace);
+        flags.set_show_trace(self.show_trace);
-        options.set_pure_eval(self.path.is_flake());
+        flags.set_pure_eval(self.path.is_flake());
-        options.set_impure(self.impure);
+        flags.set_impure(self.impure);
-        options.set_options(self.nix_options.clone());
+        flags.set_options(self.nix_options.clone());
-        options
+        flags
     }
 
-    /// Returns Nix options to set for this Hive, with configured remote builders.
+    /// Returns Nix flags to set for this Hive, with configured remote builders.
-    pub async fn nix_options_with_builders(&self) -> ColmenaResult<NixOptions> {
+    pub async fn nix_flags_with_builders(&self) -> ColmenaResult<NixFlags> {
-        let mut options = NixOptions::default();
+        let mut flags = NixFlags::default();
-        options.set_show_trace(self.show_trace);
+        flags.set_show_trace(self.show_trace);
 
         if let Some(machines_file) = &self.get_meta_config().await?.machines_file {
-            options.set_builders(Some(format!("@{}", machines_file)));
+            flags.set_builders(Some(format!("@{}", machines_file)));
         }
 
-        Ok(options)
+        Ok(flags)
     }
 
     /// Convenience wrapper to filter nodes for CLI actions.
@@ -432,7 +432,7 @@ impl<'hive> NixInstantiate<'hive> {
 
     fn eval(self) -> Command {
         let mut command = self.instantiate();
-        let options = self.hive.nix_options();
+        let flags = self.hive.nix_flags();
         command
             .arg("--eval")
             .arg("--json")
@@ -440,24 +440,24 @@ impl<'hive> NixInstantiate<'hive> {
             // Ensures the derivations are instantiated
             // Required for system profile evaluation and IFD
             .arg("--read-write-mode")
-            .args(options.to_args());
+            .args(flags.to_args());
         command
     }
 
     async fn instantiate_with_builders(self) -> ColmenaResult<Command> {
-        let options = self.hive.nix_options_with_builders().await?;
+        let flags = self.hive.nix_flags_with_builders().await?;
         let mut command = self.instantiate();
 
-        command.args(options.to_args());
+        command.args(flags.to_args());
 
         Ok(command)
     }
 
     async fn eval_with_builders(self) -> ColmenaResult<Command> {
-        let options = self.hive.nix_options_with_builders().await?;
+        let flags = self.hive.nix_flags_with_builders().await?;
         let mut command = self.eval();
 
-        command.args(options.to_args());
+        command.args(flags.to_args());
 
         Ok(command)
     }

src/nix/host/local.rs

@@ -8,7 +8,7 @@ use tokio::process::Command;
 use super::{key_uploader, CopyDirection, CopyOptions, Host};
 use crate::error::{ColmenaError, ColmenaResult};
 use crate::job::JobHandle;
-use crate::nix::{Goal, Key, NixOptions, Profile, StorePath, CURRENT_PROFILE, SYSTEM_PROFILE};
+use crate::nix::{Goal, Key, NixFlags, Profile, StorePath, CURRENT_PROFILE, SYSTEM_PROFILE};
 use crate::util::{CommandExecution, CommandExt};
 
 /// The local machine running Colmena.
@@ -18,12 +18,12 @@ use crate::util::{CommandExecution, CommandExt};
 #[derive(Debug)]
 pub struct Local {
     job: Option<JobHandle>,
-    nix_options: NixOptions,
+    nix_options: NixFlags,
     privilege_escalation_command: Option<Vec<String>>,
 }
 
 impl Local {
-    pub fn new(nix_options: NixOptions) -> Self {
+    pub fn new(nix_options: NixFlags) -> Self {
         Self {
             job: None,
             nix_options,

src/nix/mod.rs

@@ -91,9 +91,9 @@ pub struct MetaConfig {
     pub machines_file: Option<String>,
 }
 
-/// Nix options.
+/// Nix CLI flags.
 #[derive(Debug, Clone, Default)]
-pub struct NixOptions {
+pub struct NixFlags {
     /// Whether to pass --show-trace.
     show_trace: bool,
 
@@ -191,7 +191,7 @@ impl NodeConfig {
     }
 }
 
-impl NixOptions {
+impl NixFlags {
     pub fn set_show_trace(&mut self, show_trace: bool) {
         self.show_trace = show_trace;
     }
@@ -213,10 +213,10 @@ impl NixOptions {
     }
 
     pub fn to_args(&self) -> Vec<String> {
-        let mut options = Vec::new();
+        let mut args = Vec::new();
 
         if let Some(builders) = &self.builders {
-            options.append(&mut vec![
+            args.append(&mut vec![
                 "--option".to_string(),
                 "builders".to_string(),
                 builders.clone(),
@@ -224,24 +224,24 @@ impl NixOptions {
         }
 
         if self.show_trace {
-            options.push("--show-trace".to_string());
+            args.push("--show-trace".to_string());
         }
 
         if self.pure_eval {
-            options.push("--pure-eval".to_string());
+            args.push("--pure-eval".to_string());
         }
 
         if self.impure {
-            options.push("--impure".to_string());
+            args.push("--impure".to_string());
         }
 
         for (name, value) in self.options.iter() {
-            options.push("--option".to_string());
+            args.push("--option".to_string());
-            options.push(name.to_string());
+            args.push(name.to_string());
-            options.push(value.to_string());
+            args.push(value.to_string());
         }
 
-        options
+        args
     }
 }