feat: add dev flag

docs/src/content/docs/reference/cli.mdx

@@ -110,6 +110,7 @@ Installs dependencies for the current project.
 
 - `--locked`: Whether to error if the lockfile is out of date.
 - `--prod`: Whether to not linking dev dependencies.
+- `--dev`: Whether to only link dev dependencies.
 - `--network-concurrency <CONCURRENCY>`: The number of concurrent network
   requests to make at most. Defaults to 16.
 - `--force`: Whether to force reinstall all packages even if they are already

src/cli/commands/execute.rs

@@ -9,7 +9,7 @@ use console::style;
 use fs_err::tokio as fs;
 use indicatif::MultiProgress;
 use pesde::{
-	download_and_link::DownloadAndLinkOptions,
+	download_and_link::{DownloadAndLinkOptions, InstallDependenciesMode},
 	linking::generator::generate_bin_linking_module,
 	manifest::target::TargetKind,
 	names::{PackageName, PackageNames},
@@ -178,7 +178,7 @@ impl ExecuteCommand {
 						DownloadAndLinkOptions::<CliReporter<Stderr>, ()>::new(reqwest)
 							.reporter(reporter)
 							.refreshed_sources(refreshed_sources)
-							.prod(true),
+							.install_dependencies_mode(InstallDependenciesMode::Prod),
 					)
 					.await
 					.context("failed to download and link dependencies")?;

src/cli/commands/install.rs

@@ -3,7 +3,7 @@ use crate::cli::{
 	run_on_workspace_members,
 };
 use clap::Args;
-use pesde::Project;
+use pesde::{download_and_link::InstallDependenciesMode, Project};
 use std::num::NonZeroUsize;
 
 #[derive(Debug, Args, Copy, Clone)]
@@ -16,6 +16,10 @@ pub struct InstallCommand {
 	#[arg(long)]
 	prod: bool,
 
+	/// Whether to only install dev dependencies
+	#[arg(long)]
+	dev: bool,
+
 	/// The maximum number of concurrent network requests
 	#[arg(long, default_value = "16")]
 	network_concurrency: NonZeroUsize,
@@ -30,9 +34,16 @@ pub struct InstallCommand {
 struct CallbackError(#[from] anyhow::Error);
 impl InstallCommand {
 	pub async fn run(self, project: Project, reqwest: reqwest::Client) -> anyhow::Result<()> {
+		let install_dependencies_mode = match (self.prod, self.dev) {
+			(true, true) => anyhow::bail!("cannot have both prod and dev flags enabled"),
+			(true, false) => InstallDependenciesMode::Prod,
+			(false, true) => InstallDependenciesMode::Dev,
+			(false, false) => InstallDependenciesMode::All,
+		};
+
 		let options = InstallOptions {
 			locked: self.locked,
-			prod: self.prod,
+			install_dependencies_mode,
 			write: true,
 			network_concurrency: self.network_concurrency,
 			use_lockfile: true,

src/cli/commands/update.rs

@@ -3,7 +3,7 @@ use crate::cli::{
 	run_on_workspace_members,
 };
 use clap::Args;
-use pesde::Project;
+use pesde::{download_and_link::InstallDependenciesMode, Project};
 use std::num::NonZeroUsize;
 
 #[derive(Debug, Args, Copy, Clone)]
@@ -25,7 +25,7 @@ impl UpdateCommand {
 	pub async fn run(self, project: Project, reqwest: reqwest::Client) -> anyhow::Result<()> {
 		let options = InstallOptions {
 			locked: false,
-			prod: false,
+			install_dependencies_mode: InstallDependenciesMode::All,
 			write: !self.no_install,
 			network_concurrency: self.network_concurrency,
 			use_lockfile: false,

src/cli/install.rs

@@ -10,7 +10,7 @@ use anyhow::Context as _;
 use console::style;
 use fs_err::tokio as fs;
 use pesde::{
-	download_and_link::{DownloadAndLinkHooks, DownloadAndLinkOptions},
+	download_and_link::{DownloadAndLinkHooks, DownloadAndLinkOptions, InstallDependenciesMode},
 	engine::EngineKind,
 	graph::{DependencyGraph, DependencyGraphWithTarget},
 	lockfile::Lockfile,
@@ -123,7 +123,7 @@ impl DownloadAndLinkHooks for InstallHooks {
 #[derive(Debug, Clone, Copy)]
 pub struct InstallOptions {
 	pub locked: bool,
-	pub prod: bool,
+	pub install_dependencies_mode: InstallDependenciesMode,
 	pub write: bool,
 	pub use_lockfile: bool,
 	pub network_concurrency: NonZeroUsize,
@@ -287,7 +287,7 @@ pub async fn install(
 							.reporter(reporter)
 							.hooks(hooks)
 							.refreshed_sources(refreshed_sources.clone())
-							.prod(options.prod)
+							.install_dependencies_mode(options.install_dependencies_mode)
 							.network_concurrency(options.network_concurrency)
 							.force(options.force || has_irrecoverable_changes),
 					)

src/download_and_link.rs

@@ -64,6 +64,18 @@ impl DownloadAndLinkHooks for () {
 	type Error = Infallible;
 }
 
+/// Options for which dependencies to install.
+#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Default)]
+pub enum InstallDependenciesMode {
+	/// Install all dependencies.
+	#[default]
+	All,
+	/// Install only dependencies, not dev_dependencies.
+	Prod,
+	/// Install only dev_dependencies.
+	Dev,
+}
+
 /// Options for downloading and linking.
 #[derive(Debug)]
 pub struct DownloadAndLinkOptions<Reporter = (), Hooks = ()> {
@@ -75,8 +87,8 @@ pub struct DownloadAndLinkOptions<Reporter = (), Hooks = ()> {
 	pub hooks: Option<Arc<Hooks>>,
 	/// The refreshed sources.
 	pub refreshed_sources: RefreshedSources,
-	/// Whether to skip dev dependencies.
+	/// Which dependencies to install.
-	pub prod: bool,
+	pub install_dependencies_mode: InstallDependenciesMode,
 	/// The max number of concurrent network requests.
 	pub network_concurrency: NonZeroUsize,
 	/// Whether to re-install all dependencies even if they are already installed
@@ -96,7 +108,7 @@ where
 			reporter: None,
 			hooks: None,
 			refreshed_sources: Default::default(),
-			prod: false,
+			install_dependencies_mode: InstallDependenciesMode::All,
 			network_concurrency: NonZeroUsize::new(16).unwrap(),
 			force: false,
 		}
@@ -123,10 +135,13 @@ where
 		self
 	}
 
-	/// Sets whether to skip dev dependencies.
+	/// Sets which dependencies to install
 	#[must_use]
-	pub fn prod(mut self, prod: bool) -> Self {
+	pub fn install_dependencies_mode(
-		self.prod = prod;
+		mut self,
+		install_dependencies: InstallDependenciesMode,
+	) -> Self {
+		self.install_dependencies_mode = install_dependencies;
 		self
 	}
 
@@ -152,7 +167,7 @@ impl Clone for DownloadAndLinkOptions {
 			reporter: self.reporter.clone(),
 			hooks: self.hooks.clone(),
 			refreshed_sources: self.refreshed_sources.clone(),
-			prod: self.prod,
+			install_dependencies_mode: self.install_dependencies_mode,
 			network_concurrency: self.network_concurrency,
 			force: self.force,
 		}
@@ -161,7 +176,7 @@ impl Clone for DownloadAndLinkOptions {
 
 impl Project {
 	/// Downloads a graph of dependencies and links them in the correct order
-	#[instrument(skip_all, fields(prod = options.prod), level = "debug")]
+	#[instrument(skip_all, fields(install_dependencies = debug(options.install_dependencies_mode)), level = "debug")]
 	pub async fn download_and_link<Reporter, Hooks>(
 		&self,
 		graph: &Arc<DependencyGraph>,
@@ -176,7 +191,7 @@ impl Project {
 			reporter,
 			hooks,
 			refreshed_sources,
-			prod,
+			install_dependencies_mode,
 			network_concurrency,
 			force,
 		} = options;
@@ -420,11 +435,17 @@ impl Project {
 
 		let mut graph = Arc::into_inner(graph).unwrap();
 
-		if prod {
+		match install_dependencies_mode {
+			InstallDependenciesMode::All => {}
+			InstallDependenciesMode::Prod => {
 				graph.retain(|_, node| node.node.resolved_ty != DependencyType::Dev);
 			}
+			InstallDependenciesMode::Dev => {
+				graph.retain(|_, node| node.node.resolved_ty == DependencyType::Dev);
+			}
+		}
 
-		if prod || !force {
+		if install_dependencies_mode != InstallDependenciesMode::All || !force {
 			self.remove_unused(&graph).await?;
 		}