Add some text decoration to toolchain CLI (#4882)

## Summary

Attempts to make the CLI output a little more consistent with the `pip`
interface. I opted to make the Python versions, requests, and filenames
blue, and the keys green, but open to opinions on that. (We use blue for
filenames elsewhere.)

Closes #4813.
Closes https://github.com/astral-sh/uv/issues/4814.

![Screenshot 2024-07-07 at 9 18
48 PM](8518b559-196b-4cd0-bc16-8e79e66460bb)

crates/uv/src/commands/python/install.rs

@@ -5,6 +5,7 @@ use anyhow::Result;
 use fs_err as fs;
 use futures::StreamExt;
 use itertools::Itertools;
+use owo_colors::OwoColorize;
 use uv_cache::Cache;
 use uv_client::Connectivity;
 use uv_configuration::PreviewMode;
@@ -15,7 +16,7 @@ use uv_python::{requests_from_version_file, PythonRequest};
 use uv_warnings::warn_user_once;
 
 use crate::commands::reporters::PythonDownloadReporter;
-use crate::commands::ExitStatus;
+use crate::commands::{elapsed, ExitStatus};
 use crate::printer::Printer;
 
 /// Download and install Python versions.
@@ -62,7 +63,8 @@ pub(crate) async fn install(
     for (request, download_request) in requests.iter().zip(download_requests) {
         writeln!(
             printer.stderr(),
-            "Looking for installation {request} ({download_request})"
+            "Searching for Python versions matching: {}",
+            request.cyan()
         )?;
         if let Some(installation) = installed_installations
             .iter()
@@ -70,14 +72,15 @@ pub(crate) async fn install(
         {
             writeln!(
                 printer.stderr(),
-                "Found existing installation `{}` that satisfies {request}",
+                "Found existing installation for {}: {}",
-                installation.key()
+                request.cyan(),
+                installation.key().green(),
             )?;
             if force {
                 writeln!(
                     printer.stderr(),
-                    "Removing existing installation `{}`",
+                    "Uninstalling {}",
-                    installation.key()
+                    installation.key().green()
                 )?;
                 fs::remove_dir_all(installation.path())?;
                 unfilled_requests.push(download_request);
@@ -94,12 +97,7 @@ pub(crate) async fn install(
                 "Python is already available. Use `uv python install <request>` to install a specific version.",
             )?;
         } else if requests.len() > 1 {
-            writeln!(
+            writeln!(printer.stderr(), "All requested versions already installed")?;
-                printer.stderr(),
-                "All requested versions already installed."
-            )?;
-        } else {
-            writeln!(printer.stderr(), "Requested versions already installed.")?;
         }
         return Ok(ExitStatus::Success);
     }
@@ -117,13 +115,6 @@ pub(crate) async fn install(
         .unique_by(|download| download.key())
         .collect::<Vec<_>>();
 
-    let s = if downloads.len() == 1 { "" } else { "s" };
-    writeln!(
-        printer.stderr(),
-        "Found {} version{s} requiring installation",
-        downloads.len()
-    )?;
-
     // Construct a client
     let client = uv_client::BaseClientBuilder::new()
         .connectivity(connectivity)
@@ -150,8 +141,9 @@ pub(crate) async fn install(
             DownloadResult::Fetched(path) => {
                 writeln!(
                     printer.stderr(),
-                    "Installed Python {version} to {}",
+                    "Installed {} to: {}",
-                    path.user_display()
+                    format!("Python {version}").cyan(),
+                    path.user_display().cyan()
                 )?;
                 path
             }
@@ -165,9 +157,13 @@ pub(crate) async fn install(
     let s = if downloads.len() == 1 { "" } else { "s" };
     writeln!(
         printer.stderr(),
-        "Installed {} version{s} in {}s",
+        "{}",
-        downloads.len(),
+        format!(
-        start.elapsed().as_secs()
+            "Installed {} {}",
+            format!("{} version{s}", downloads.len()).bold(),
+            format!("in {}", elapsed(start.elapsed())).dimmed()
+        )
+        .dimmed()
     )?;
 
     Ok(ExitStatus::Success)

crates/uv/src/commands/python/list.rs

@@ -79,7 +79,7 @@ pub(crate) async fn list(
     .collect::<Result<Vec<Result<PythonInstallation, PythonNotFound>>, DiscoveryError>>()?
     .into_iter()
     // Drop any "missing" installations
-    .filter_map(std::result::Result::ok);
+    .filter_map(Result::ok);
 
     let mut output = BTreeSet::new();
     for installation in installed {

crates/uv/src/commands/python/uninstall.rs

@@ -4,6 +4,7 @@ use std::fmt::Write;
 use anyhow::Result;
 use futures::StreamExt;
 use itertools::Itertools;
+use owo_colors::OwoColorize;
 
 use uv_configuration::PreviewMode;
 use uv_python::downloads::{self, PythonDownloadRequest};
@@ -11,7 +12,7 @@ use uv_python::managed::ManagedPythonInstallations;
 use uv_python::PythonRequest;
 use uv_warnings::warn_user_once;
 
-use crate::commands::ExitStatus;
+use crate::commands::{elapsed, ExitStatus};
 use crate::printer::Printer;
 
 /// Uninstall managed Python versions.
@@ -24,6 +25,8 @@ pub(crate) async fn uninstall(
         warn_user_once!("`uv python uninstall` is experimental and may change without warning.");
     }
 
+    let start = std::time::Instant::now();
+
     let installations = ManagedPythonInstallations::from_settings()?.init()?;
     let _lock = installations.acquire_lock()?;
 
@@ -43,7 +46,8 @@ pub(crate) async fn uninstall(
     for (request, download_request) in requests.iter().zip(download_requests) {
         writeln!(
             printer.stderr(),
-            "Looking for Python installations matching {request} ({download_request})"
+            "Searching for Python versions matching: {}",
+            request.cyan()
         )?;
         let mut found = false;
         for installation in installed_installations
@@ -54,31 +58,28 @@ pub(crate) async fn uninstall(
             if matching_installations.insert(installation.clone()) {
                 writeln!(
                     printer.stderr(),
-                    "Found installation `{}` that matches {request}",
+                    "Found existing installation for {}: {}",
-                    installation.key()
+                    request.cyan(),
+                    installation.key().green(),
                 )?;
             }
         }
         if !found {
             writeln!(
                 printer.stderr(),
-                "No installations found matching {request}"
+                "No existing installations found for: {}",
+                request.cyan()
             )?;
         }
     }
 
     if matching_installations.is_empty() {
         if matches!(requests.as_slice(), [PythonRequest::Any]) {
-            writeln!(printer.stderr(), "No installed installations found")?;
+            writeln!(printer.stderr(), "No Python installations found")?;
         } else if requests.len() > 1 {
             writeln!(
                 printer.stderr(),
-                "No installations found matching the requests"
+                "No Python installations found matching the requests"
-            )?;
-        } else {
-            writeln!(
-                printer.stderr(),
-                "No installations found matching the request"
             )?;
         }
         return Ok(ExitStatus::Failure);
@@ -98,18 +99,19 @@ pub(crate) async fn uninstall(
     for (key, result) in results.iter().sorted_by_key(|(key, _)| key) {
         if let Err(err) = result {
             failed = true;
-            writeln!(printer.stderr(), "Failed to uninstall `{key}`: {err}")?;
+            writeln!(
+                printer.stderr(),
+                "Failed to uninstall {}: {err}",
+                key.green()
+            )?;
         } else {
-            writeln!(printer.stderr(), "Uninstalled `{key}`")?;
+            writeln!(printer.stderr(), "Uninstalled {}", key.green())?;
         }
     }
 
     if failed {
         if matching_installations.len() > 1 {
-            writeln!(
+            writeln!(printer.stderr(), "Failed to uninstall some Python versions")?;
-                printer.stderr(),
-                "Failed to remove some Python installations"
-            )?;
         }
         return Ok(ExitStatus::Failure);
     }
@@ -119,11 +121,15 @@ pub(crate) async fn uninstall(
     } else {
         "s"
     };
-
     writeln!(
         printer.stderr(),
-        "Removed {} Python installation{s}",
+        "{}",
-        matching_installations.len()
+        format!(
+            "Uninstalled {} {}",
+            format!("{} version{s}", matching_installations.len()).bold(),
+            format!("in {}", elapsed(start.elapsed())).dimmed()
+        )
+        .dimmed()
     )?;
 
     Ok(ExitStatus::Success)