Add --executable option to env info command (#7547)

docs/managing-environments.md

@@ -39,6 +39,7 @@ pyenv install 3.9.8
 pyenv local 3.9.8  # Activate Python 3.9 for the current project
 pyenv local 3.9.8  # Activate Python 3.9 for the current project
 poetry install
 poetry install
 ```
 ```
+
 {{% /note %}}
 {{% /note %}}
 
 
 {{% note %}}
 {{% note %}}
@@ -106,6 +107,13 @@ to `env info`:
 poetry env info --path
 poetry env info --path
 ```
 ```
 
 
+If you only want to know the path to the python executable (useful for running mypy from a global environment without installing it in the virtual environment), you can pass the `--executable` option
+to `env info`:
+
+```bash
+poetry env info --executable
+```
+
 ## Listing the environments associated with the project
 ## Listing the environments associated with the project
 
 
 You can also list all the virtual environments associated with the current project
 You can also list all the virtual environments associated with the current project
@@ -140,10 +148,13 @@ poetry env remove test-O3eWbxRl-py3.7
 ```
 ```
 
 
 You can delete more than one environment at a time.
 You can delete more than one environment at a time.
+
 ```bash
 ```bash
 poetry env remove python3.6 python3.7 python3.8
 poetry env remove python3.6 python3.7 python3.8
 ```
 ```
+
 Use the `--all` option to delete all virtual environments at once.
 Use the `--all` option to delete all virtual environments at once.
+
 ```bash
 ```bash
 poetry env remove --all
 poetry env remove --all
 ```
 ```

src/poetry/console/commands/env/info.py

@@ -15,7 +15,12 @@ class EnvInfoCommand(Command):
     name = "env info"
     name = "env info"
     description = "Displays information about the current environment."
     description = "Displays information about the current environment."
 
 
-    options = [option("path", "p", "Only display the environment's path.")]
+    options = [
+        option("path", "p", "Only display the environment's path."),
+        option(
+            "executable", "e", "Only display the environment's python executable path."
+        ),
+    ]
 
 
     def handle(self) -> int:
     def handle(self) -> int:
         from poetry.utils.env import EnvManager
         from poetry.utils.env import EnvManager
@@ -30,6 +35,14 @@ class EnvInfoCommand(Command):
 
 
             return 0
             return 0
 
 
+        if self.option("executable"):
+            if not env.is_venv():
+                return 1
+
+            self.line(str(env.python))
+
+            return 0
+
         self._display_complete_info(env)
         self._display_complete_info(env)
         return 0
         return 0
 
 

tests/console/commands/env/test_info.py

@@ -58,3 +58,9 @@ def test_env_info_displays_path_only(tester: CommandTester):
     tester.execute("--path")
     tester.execute("--path")
     expected = str(Path("/prefix")) + "\n"
     expected = str(Path("/prefix")) + "\n"
     assert tester.io.fetch_output() == expected
     assert tester.io.fetch_output() == expected
+
+
+def test_env_info_displays_executable_only(tester: CommandTester):
+    tester.execute("--executable")
+    expected = str(sys.executable) + "\n"
+    assert tester.io.fetch_output() == expected