Added pointer files processing and cloning of secondary repositories. Building is ready but commented out until docker-py is ready

brew/brew.py

@@ -1,5 +1,7 @@
 import os
 
+import docker
+
 import git
 
 DEFAULT_REPOSITORY = 'git://github.com/dotcloud/docker'
@@ -18,4 +20,37 @@ def fetch_buildlist(repository=None, branch=None):
         f = open(os.path.join(dst_folder, 'library', buildfile))
         for line in f:
             print buildfile, '--->', line
+            args = line.split()
+            try:
+                #FIXME: delegate to workers instead?
+                if len(args) == 1:  # Just a URL, simple mode
+                    start_build(args[0], 'refs/heads/master', buildfile)
+                elif len(args) == 3:  # docker-tag  url     B:branch or T:tag
+                    ref = None
+                    if args[2].startswith('B:'):
+                        ref = 'refs/heads/' + args[2][2:]
+                    elif args[2].startswith('T:'):
+                        ref = 'refs/tags/' + args[2][2:]
+                    else:
+                        raise RuntimeError('Incorrect line format, '
+                            'please refer to the docs')
+                    start_build(args[1], ref, buildfile, args[0])
+            except Exception as e:
+                print '!!! ', str(e).strip()
         f.close()
+
+
+def start_build(repository, ref, docker_repo, docker_tag=None):
+    print '---> Cloning {0} (ref: {1})'.format(repository, ref)
+    dst_folder = git.clone(repository, ref)
+    if not 'Dockerfile' in os.listdir(dst_folder):
+        raise RuntimeError('Dockerfile not found in cloned repository')
+    f = open(os.path.join(dst_folder, 'Dockerfile'))
+    print '---> Building using dockerfile...'
+    #img_id, logs = docker.build_context(dst_folder)
+    print '--> Committing to library/{0}:{1}'.format(docker_repo,
+        docker_tag or 'latest')
+    #docker.commit(img_id, 'library/' + docker_repo, docker_tag)
+    print '---> Pushing result to the main registry'
+    #docker.push('library/' + docker_repo)
+    f.close()