diff --git a/src/build.rs b/src/build.rs
new file mode 100644
index 0000000..7f83869
--- /dev/null
+++ b/src/build.rs
@@ -0,0 +1,52 @@
+use anyhow::{Error, Result};
+use git2::BranchType;
+
+use crate::config::RepoConfig;
+
+pub fn pull_or_clone_and_build_and_push(repo: &RepoConfig) -> Result<(), BuildError> {
+    let git_repo = pull_or_clone(repo)?;
+    build(&git_repo)?;
+    push(&git_repo)?;
+
+    Ok(())
+}
+
+fn pull_or_clone(repo: &RepoConfig) -> Result<git2::Repository, BuildError> {
+    match git2::Repository::open(&repo.local_git_repo) {
+        Ok(git_repo) => {
+            pull(&git_repo).map_err(|err| BuildError::FailedToPull(err))?;
+            Ok(git_repo)
+        },
+
+        Err(open_err) =>  match git2::Repository::clone(&repo.remote_git_repo, &repo.local_git_repo) {
+            Ok(git_repo) => Ok(git_repo),
+            Err(clone_err) => Err(BuildError::FailedToOpenOrClone(open_err.into(), clone_err.into())),
+        }
+    }
+}
+
+fn pull(git_repo: &git2::Repository) -> Result<()> {
+    let mut origin = git_repo.find_remote("origin")?;
+    let (main_branch, main_branch_name) = git_repo.find_branch("main", BranchType::Local).map(|b| (b, "main"))
+        .or_else(|_| git_repo.find_branch("master", BranchType::Local).map(|b| (b, "master")))?;
+    let upstream_main_branch = main_branch.upstream()?;
+
+    git_repo.set_head(main_branch_name)?;
+    origin.fetch(&[main_branch_name], None, None)?;
+    let upstream_commit = git_repo.reference_to_annotated_commit(&upstream_main_branch.into_reference())?;
+    git_repo.merge(&[&upstream_commit], None, None)?;
+    Ok(())
+}
+
+fn build(git_repo: &git2::Repository) -> Result<(), BuildError> {
+    todo!()
+}
+
+fn push(git_repo: &git2::Repository) -> Result<(), BuildError> {
+    todo!()
+}
+
+pub enum BuildError {
+    FailedToOpenOrClone(Error, Error),
+    FailedToPull(Error),
+}
diff --git a/src/main.rs b/src/main.rs
index 215f9e6..42cfaae 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,12 +4,13 @@ use dirs::config_dir;
 
 #[macro_use] extern crate rocket;
 
+mod build;
 mod config;
 
 use config::read_config;
 use rocket::{State, http::Status};
 
-use crate::config::Config;
+use crate::{build::{BuildError, pull_or_clone_and_build_and_push}, config::Config};
 
 const BIN_NAME: &str = "build-joeac";
 
@@ -30,7 +31,20 @@ fn index(remote_git_repo: PathBuf, config: &State<Config>) -> (Status, String) {
         None => (Status::BadRequest, format!("Failed to convert request path to unicode: {:?}", remote_git_repo)),
         Some(remote_git_repo) => match config.repositories.iter().find(|repo| repo.remote_git_repo.eq(remote_git_repo)) {
             None => (Status::NotFound, format!("Remote git repository not configured: {remote_git_repo}")),
-            Some(repo) => (Status::Ok, format!("Matched! {:?}", repo))
+            Some(repo) => match pull_or_clone_and_build_and_push(repo) {
+                Err(BuildError::FailedToOpenOrClone(open_err, clone_err)) => (
+                    Status::InternalServerError,
+                    format!(
+                        "Failed to open or clone git repository. Error opening: {:#?}\n\nError cloning: {:#?}",
+                        open_err,
+                        clone_err)
+                ),
+                Err(BuildError::FailedToPull(err)) => (
+                    Status::InternalServerError,
+                    format!("Failed to pull git repository. Error: {:#?}", err),
+                ),
+                Ok(()) => (Status::Ok, String::from("Pulled, built and pushed image")),
+            }
         }
     }
 }