Move find_root function into the new shared crate

This cleans up the init function using the modified find_root function
for ticket and moves it into a new shared crate so that other tools that
might be built can use it. This means we can easily find the root of
a git repo no matter where in the repo one is and build paths relative
to it.

Closes #3

2 files changed, 33 insertions, 0 deletions

diff --git a/shared/Cargo.toml b/shared/Cargo.toml
new file mode 100644
index 0000000..a072d12
--- /dev/null
+++ b/shared/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "shared"
+version = "0.1.0"
+authors = ["Michael Gattozzi <mgattozzi@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0"
diff --git a/shared/src/lib.rs b/shared/src/lib.rs
new file mode 100644
index 0000000..9fdcc27
--- /dev/null
+++ b/shared/src/lib.rs
@@ -0,0 +1,23 @@
+use anyhow::{bail, Result};
+use std::{env, path::PathBuf};
+
+pub fn find_root() -> Result<PathBuf> {
+  let mut location = env::current_dir()?;
+  let mut found_root = false;
+
+  for loc in location.ancestors() {
+    let mut loc = loc.join(".git");
+    if loc.exists() {
+      loc.pop();
+      found_root = true;
+      location = loc.canonicalize()?;
+      break;
+    }
+  }
+
+  if found_root {
+    Ok(location)
+  } else {
+    bail!("Unable to find a valid git repo");
+  }
+}