diff --git a/.gitignore b/.gitignore
index 85952ac..b9aea17 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,7 @@ __pycache__
 # Pypi
 build
 dist
-tumbo.*
+tumbo.egg-info
 
 # Editors
 .vscode
diff --git a/tumbo/tumbo.py b/tumbo/tumbo.py
new file mode 100644
index 0000000..9351354
--- /dev/null
+++ b/tumbo/tumbo.py
@@ -0,0 +1,132 @@
+import os
+import random
+import subprocess
+from itertools import product
+from multiprocessing import Pool, cpu_count
+from typing import Optional
+
+from termcolor import colored
+
+from tumbo.utils import buffer_to_string, resolve_path, compile_string
+
+
+def exec(command, *args, **kwargs):
+    output = subprocess.run(command, *args, capture_output=True, **kwargs)
+
+    if output.returncode is not 0:
+        raise Exception(buffer_to_string(output.stderr))
+
+    return buffer_to_string(output.stdout)
+
+
+def exec_multiple(commands, *args, show=True, **kwargs):
+    try:
+        for command in commands:
+            print(colored(' '.join(command), 'blue', attrs=['bold']))
+            result = exec(command, *args, **kwargs)
+            if show:
+                print(result + '\n')
+    except Exception as e:
+        print(colored(e, 'red'))
+
+
+def build_push_run(rendered, name, context, push, run, show=False):
+    try:
+
+        # Create a tmp dockerfile to work with
+        hash = resolve_path(context, str(random.getrandbits(128)))
+
+        if not os.access('.', os.W_OK):
+            print(colored('Cannot write to directory', 'red'))
+            return
+
+        if os.path.isfile(hash):
+            print(colored(f'File {hash} already exitsts.', 'red'))
+            return
+
+        with open(hash, 'w') as f:
+            f.write(rendered)
+
+        commands = [['docker', 'build', '-f', hash, '-t', name, '.']]
+        if (push):
+            commands.append(['docker', 'push', name])
+        if (run):
+            commands.append(['docker', 'run', '--rm', name])
+
+        exec_multiple(commands, cwd=context, show=show)
+
+    finally:
+        # Delete the tmp file
+        if os.path.exists(hash):
+            os.remove(hash)
+
+
+def process_queue(queue, context, parallel, push, run):
+    queue = [
+        (rendered, tag, context, push, run, True)
+        for rendered, tag in queue
+    ]
+
+    if parallel:
+        thread_count = parallel if type(parallel) is int else cpu_count()
+        with Pool(thread_count) as pool:
+            pool.starmap(build_push_run, queue)
+    else:
+        for item in queue:
+            build_push_run(*item)
+
+
+def compile_templates(variables, recipe, tag, context, show=True):
+    queue = []
+    for item in product(*variables.values()):
+        zipped_variables = dict(zip(variables.keys(), item))
+        path = compile_string(recipe, zipped_variables)
+        if tag:
+            name = compile_string(tag, zipped_variables)
+        else:
+            # If no tag is provided construct one from all variables to avoid any duplicated tags
+            all_values_as_strings = map(str, zipped_variables.values())
+            name = '-'.join(all_values_as_strings)
+            name = name.lower()  # Docker tags must be lower case
+
+        with open(resolve_path(context, path), 'r') as f:
+            rendered = compile_string(f.read(), zipped_variables)
+
+        queue.append((rendered, name))
+
+        if show:
+            print(
+                '\n' +
+                colored('Variation:', 'green') + f'\t{str(zipped_variables)}\n' +
+                colored('Recipe:', 'green') + f'\t\t{path}\n' +
+                colored('Tag:', 'green') + f'\t\t{name}\n'
+            )
+
+    return queue
+
+
+def login_if_required(registry) -> Optional[str]:
+    if registry:
+        host = registry.get('host')
+        username = registry.get('username')
+        password = registry.get('password')
+
+        if not host:
+            raise Exception(colored('No host set for registry', 'red'))
+
+        cmd = ['docker', 'login']
+        if username or password:
+            if not username or not password:
+                raise Exception(colored('Username or password not set', 'red'))
+            # TODO: use stdin
+            cmd += ['-u', username, '-p', password]
+
+        try:
+            out = exec(cmd + [host])
+            print(colored(out + '\n', 'green'))
+            return host
+        except Exception as e:
+            print(colored('Could not log in, check your username', 'red'))
+            return None
+
+    return None