Powershell module update (fix #41)

src/windows.rs

@@ -1,6 +1,7 @@
 use super::terminal::Terminal;
-use super::utils::{self, Check};
+use super::utils::{self, which, Check};
 use failure;
+use std::path::PathBuf;
 use std::process::Command;
 
 #[must_use]
@@ -18,3 +19,31 @@ pub fn run_chocolatey(terminal: &mut Terminal) -> Option<(&'static str, bool)> {
 
     None
 }
+
+pub struct Powershell {
+    path: Option<PathBuf>,
+}
+
+impl Powershell {
+    pub fn new() -> Self {
+        Powershell {
+            path: which("powershell"),
+        }
+    }
+
+    #[must_use]
+    pub fn update_modules(&self, terminal: &mut Terminal) -> Option<(&'static str, bool)> {
+        if let Some(powershell) = &self.path {
+            terminal.print_separator("Powershell Module Update");
+
+            let success = || -> Result<(), failure::Error> {
+                Command::new(&powershell).arg("Update-Module").spawn()?.wait()?.check()?;
+                Ok(())
+            }().is_ok();
+
+            return Some(("Powershell Module Update", success));
+        }
+
+        None
+    }
+}