Collect git repositories

src/git.rs

@@ -0,0 +1,50 @@
+use super::error::*;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+use which::which;
+
+pub struct Git {
+    git: Option<PathBuf>,
+}
+
+impl Git {
+    pub fn new() -> Self {
+        Self {
+            git: which("git").ok(),
+        }
+    }
+
+    pub fn get_repo_root<P: AsRef<Path>>(&self, path: P) -> Option<String> {
+        if !path.as_ref().exists() {
+            return None;
+        }
+
+        if let Some(git) = &self.git {
+            let output = Command::new(&git)
+                .arg("rev-parse")
+                .arg("--show-toplevel")
+                .current_dir(path)
+                .output();
+
+            if let Ok(output) = output {
+                if !output.status.success() {
+                    return None;
+                }
+
+                return Some(String::from_utf8_lossy(&output.stdout).trim().to_string());
+            }
+        }
+
+        None
+    }
+
+    pub fn pull<P: AsRef<Path>>(&self, path: P) -> Result<()> {
+        if let Some(git) = &self.git {
+            if let Ok(mut command) = Command::new(&git).arg("pull").current_dir(path).spawn() {
+                command.wait()?;
+            }
+        }
+
+        Ok(())
+    }
+}