fix: recursion in template parsing

src/error.rs

@@ -63,6 +63,8 @@ pub enum BleurError {
     InvalidRepositoryName(String),
     #[error("git error: {0}")]
     GitError(git2::Error),
+    #[error("brotha, what on earth makes you want collection more than {0} depths?")]
+    AintNoWayThisDeepCollection(u8),
 
     // To be used only if you get despaired.
     // Until so, don't touch, for the sake of your own sanity!

src/manager.rs

@@ -115,7 +115,7 @@ impl Manager {
     }
 
     pub fn parse(self) -> Result<Self> {
-        let template = Configuration::surely_template(self.temporary.path().to_path_buf())?;
+        let template = Configuration::surely_template(self.temporary.path().to_path_buf(), 1)?;
 
         Ok(Self {
             template,

src/schemes/mod.rs

@@ -6,6 +6,8 @@ use crate::{Error, Result};
 use std::fs;
 use std::path::PathBuf;
 
+static MAX_COLLECTIONS_DEPTH: u8 = 5;
+
 #[derive(Debug, Default, Clone)]
 pub enum Configuration {
     // If repo is a single template
@@ -44,9 +46,13 @@ impl Configuration {
         Self::Empty
     }
 
-    pub fn surely_template(path: PathBuf) -> Result<Self> {
+    pub fn surely_template(path: PathBuf, depth: u8) -> Result<Self> {
         use Configuration::*;
 
+        if depth > MAX_COLLECTIONS_DEPTH {
+            return Err(Error::AintNoWayThisDeepCollection(depth));
+        }
+
         match Self::parse(path.clone()) {
             Template(t) => Ok(Self::Template(t)),
             Empty => Err(Error::NoTemplateConfiguration),
@@ -60,7 +66,7 @@ impl Configuration {
 
                 let option = c.select(option).ok_or(Error::NoSuchTemplateInCollection)?;
 
-                Self::surely_template(option.path(path))
+                Self::surely_template(option.path(path), depth + 1)
             }
         }
     }