Add support for detecting Python from Pipenv files (#221)

Added the ability to enable the Python module based on the existence of the a `Pipfile`.

docs/config/README.md

@@ -421,6 +421,7 @@ The module will be shown if any of the following conditions are met:
 - The current directory contains a `requirements.txt` file
 - The current directory contains a `pyproject.toml` file
 - The current directory contains a file with the `.py` extension
+- The current directory contains a `Pipfile` file
 
 ### Options
 

src/modules/python.rs

@@ -15,10 +15,16 @@ use super::{Context, Module};
 ///     - Current directory contains a `requirements.txt` file
 ///     - Current directory contains a `pyproject.toml` file
 ///     - Current directory contains a file with the `.py` extension
+///     - Current directory contains a `Pipfile` file
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let is_py_project = context
         .new_scan_dir()
-        .set_files(&["requirements.txt", ".python-version", "pyproject.toml"])
+        .set_files(&[
+            "requirements.txt",
+            ".python-version",
+            "pyproject.toml",
+            "Pipfile",
+        ])
         .set_extensions(&["py"])
         .scan();
 

tests/testsuite/python.rs

@@ -57,6 +57,23 @@ fn folder_with_pyproject_toml() -> io::Result<()> {
     Ok(())
 }
 
+#[test]
+#[ignore]
+fn folder_with_pipfile() -> io::Result<()> {
+    let dir = common::new_tempdir()?;
+    File::create(dir.path().join("Pipfile"))?;
+
+    let output = common::render_module("python")
+        .arg("--path")
+        .arg(dir.path())
+        .output()?;
+    let actual = String::from_utf8(output.stdout).unwrap();
+
+    let expected = format!("via {} ", Color::Yellow.bold().paint("🐍 v3.6.9"));
+    assert_eq!(expected, actual);
+    Ok(())
+}
+
 #[test]
 #[ignore]
 fn folder_with_py_file() -> io::Result<()> {