final cleanup

README.md

@@ -60,11 +60,16 @@ During the build process, the buildpack will read the `project.toml` file and ap
 #### Example
 
 ```toml
+# _.schema-version is required for the project descriptor
 [_]
 schema-version = "0.2"
 
+# buildpack configuration goes here
 [com.heroku.buildpacks.deb-packages]
 install = [
+    # string version of a dependency to install
+    system-cron,
+    # inline-table version of a dependency to install
     { name = "git", 
       env = { "GIT_EXEC_PATH" = "{install_dir}/usr/lib/git-core", 
               "GIT_TEMPLATE_DIR" = "{install_dir}/usr/share/git-core/templates" }

src/config/environment.rs

@@ -42,13 +42,6 @@ impl Environment {
         env
     }
 
-    /// Apply environment variables to the current process.
-    // pub(crate) fn apply(&self) {
-    //     for (key, value) in &self.variables {
-    //         std::env::set_var(key, value);
-    //     }
-    // }
-
     /// Get environment variables as a `HashMap`.
     pub(crate) fn get_variables(&self) -> &HashMap<String, String> {
         &self.variables