Print activation instructions for a venv after one has been created (#1580)

crates/uv/src/commands/venv.rs

@@ -195,5 +195,22 @@ async fn venv_impl(
         }
     }
 
+    if cfg!(windows) {
+        writeln!(
+            printer,
+            // This should work whether the user is on CMD or PowerShell:
+            "Activate with: {}\\Scripts\\activate",
+            path.normalized_display().cyan()
+        )
+        .into_diagnostic()?;
+    } else {
+        writeln!(
+            printer,
+            "Activate with: source {}/bin/activate",
+            path.normalized_display().cyan()
+        )
+        .into_diagnostic()?;
+    };
+
     Ok(ExitStatus::Success)
 }

crates/uv/tests/venv.rs

@@ -20,12 +20,17 @@ fn create_venv() -> Result<()> {
 
     // Create a virtual environment at `.venv`.
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -45,6 +50,7 @@ fn create_venv() -> Result<()> {
     ----- stderr -----
     Using Python [VERSION] interpreter at [PATH]
     Creating virtualenv at: /home/ferris/project/.venv
+    Activate with: source /home/ferris/project/.venv/bin/activate
     "###
     );
 
@@ -52,12 +58,17 @@ fn create_venv() -> Result<()> {
 
     // Create a virtual environment at the same location, which should replace it.
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -78,6 +89,7 @@ fn create_venv() -> Result<()> {
     ----- stderr -----
     Using Python [VERSION] interpreter at [PATH]
     Creating virtualenv at: /home/ferris/project/.venv
+    Activate with: source /home/ferris/project/.venv/bin/activate
     "###
     );
 
@@ -94,12 +106,14 @@ fn create_venv_defaults_to_cwd() -> Result<()> {
     let venv = temp_dir.child(".venv");
 
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (&filter_prompt, "Activate with: source .venv/bin/activate"),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -119,6 +133,7 @@ fn create_venv_defaults_to_cwd() -> Result<()> {
     ----- stderr -----
     Using Python [VERSION] interpreter at [PATH]
     Creating virtualenv at: .venv
+    Activate with: source .venv/bin/activate
     "###
     );
 
@@ -135,12 +150,17 @@ fn seed() -> Result<()> {
     let venv = temp_dir.child(".venv");
 
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -163,6 +183,7 @@ fn seed() -> Result<()> {
     Using Python [VERSION] interpreter at [PATH]
     Creating virtualenv at: /home/ferris/project/.venv
      + pip==23.3.1
+    Activate with: source /home/ferris/project/.venv/bin/activate
     "###
     );
 
@@ -179,12 +200,17 @@ fn seed_older_python_version() -> Result<()> {
     let venv = temp_dir.child(".venv");
 
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -209,6 +235,7 @@ fn seed_older_python_version() -> Result<()> {
      + setuptools==68.2.2
      + pip==23.3.1
      + wheel==0.41.3
+    Activate with: source /home/ferris/project/.venv/bin/activate
     "###
     );
 
@@ -317,9 +344,14 @@ fn create_venv_python_patch() -> Result<()> {
     let venv = temp_dir.child(".venv");
 
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (r"interpreter at .+", "interpreter at [PATH]"),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -406,12 +438,17 @@ fn empty_dir_exists() -> Result<()> {
     venv.create_dir_all()?;
 
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -432,6 +469,7 @@ fn empty_dir_exists() -> Result<()> {
     ----- stderr -----
     Using Python [VERSION] interpreter at [PATH]
     Creating virtualenv at: /home/ferris/project/.venv
+    Activate with: source /home/ferris/project/.venv/bin/activate
     "###
     );
 
@@ -497,12 +535,17 @@ fn virtualenv_compatibility() -> Result<()> {
 
     // Create a virtual environment at `.venv`, passing the redundant `--clear` flag.
     let filter_venv = regex::escape(&venv.normalized_display().to_string());
+    let filter_prompt = r"Activate with: (?:.*)\\Scripts\\activate";
     let filters = &[
         (
             r"Using Python 3\.\d+\.\d+ interpreter at .+",
             "Using Python [VERSION] interpreter at [PATH]",
         ),
         (&filter_venv, "/home/ferris/project/.venv"),
+        (
+            &filter_prompt,
+            "Activate with: source /home/ferris/project/.venv/bin/activate",
+        ),
     ];
     uv_snapshot!(filters, Command::new(get_bin())
         .arg("venv")
@@ -524,6 +567,7 @@ fn virtualenv_compatibility() -> Result<()> {
     warning: virtualenv's `--clear` has no effect (uv always clears the virtual environment).
     Using Python [VERSION] interpreter at [PATH]
     Creating virtualenv at: /home/ferris/project/.venv
+    Activate with: source /home/ferris/project/.venv/bin/activate
     "###
     );