@@ -0,0 +109,4 @@
+        # make a post request
+        request_data["properties"] = {
+            "dockerfile": _get_dockerfile_contents(
+                join(directory, job, "Dockerfile"), os_codename

@@ -0,0 +69,4 @@
+    return results
+
+
+def _get_dockerfile_contents(jobname, os_codename='bionic'):

@@ -151,0 +36,4 @@
+
+    build_factory.addStep(steps.ShellCommand(
+        name="download worker",
+        command=["wget", "--force-directories", "-O", "https://git.bitmessage.org/Bitmessage/buildbot_multibuild/raw/branch/master/lib/worker_multibuild.py", join(getenv['HOME'], '.local/bin/worker_multibuild.py')]

@@ -204,7 +90,7 @@ if __name__ == "__main__":
         buildbotUrl = sys.argv[4]
         os_codename = sys.argv[5]

@@ -205,3 +91,3 @@
         os_codename = sys.argv[5]
 
-        trigger_child_hooks(buildbotUrl, os_codename, repository, branch, jobname)
+        trigger_child_hooks(buildbotUrl, os_codename, repository, branch, jobname, ".buildbot", is_build_script_available, is_test_script_available)

@@ -0,0 +59,4 @@
+    list jobs found in a directory
+    """
+    results = []
+    for _ in next(walk(directory))[1]:

@@ -151,0 +36,4 @@
+
+    build_factory.addStep(steps.ShellCommand(
+        name="download worker",
+        command=["mkdir", "-p", join(getenv['HOME'], '.local/bin'), "&&", "wget", "-O", "https://git.bitmessage.org/Bitmessage/buildbot_multibuild/raw/branch/master/lib/worker_multibuild.py", join(getenv['HOME'], '.local/bin/worker_multibuild.py')]

@@ -0,0 +60,4 @@
+    """
+    results = []
+    files = ["Dockerfile", "build.sh", "test.sh"]
+    for file in files:

@@ -0,0 +63,4 @@
+    for file in files:
+        print(join(directory, file))
+        print(exists(join(directory, file)))
+        if exists(join(directory, file)) and not islink(join(directory, file)):

@@ -154,3 +49,3 @@
-            name="Execute multibuild script",
+            name="Execute worker script",
             command=[
                 "python",

@@ -0,0 +62,4 @@
+    files = ["Dockerfile", "build.sh", "test.sh"]
+    for item in listdir(directory):
+        if isdir(join(directory, item)) and not islink(join(directory, item)):
+            for file in listdir(join(directory, item)):

@@ -0,0 +64,4 @@
+        if isdir(join(directory, item)) and not islink(join(directory, item)):
+            for file in listdir(join(directory, item)):
+                if file in files and isfile(join(directory, item, file)) and not islink(join(directory, item, file)):
+                    results.append(file)

@@ -0,0 +63,4 @@
+    for item in listdir(directory):
+        for file in files:
+            filepath = join(directory, item, file)
+            if islink(filepath) and not exists(filepath):

@@ -0,0 +65,4 @@
+            filepath = join(directory, item, file)
+            if islink(filepath) and not exists(filepath):
+                continue
+            if exists(join(directory, item, 'Dockerfile')) or exists(join(directory, item, 'build.sh')) or exists(join(directory, item, 'test.sh')):

@@ -0,0 +82,4 @@
+        res = ""
+        inside_allowed_command = False
+        for line in contents:
+            if re.match(r"(?m)^(FROM|RUN).*$", line):

@@ -157,2 +51,3 @@
-                "multibuild.py",
+                "python3",
+                join(getenv['HOME'], '.local/bin/worker_multibuild.py'),
                 util.Interpolate("%(prop:jobname)s"),

@@ -0,0 +97,4 @@
+    return res + dockerfile_extra_contents[os_codename]
+
+
+def trigger_child_hooks(buildbotUrl: str, repository, branch, jobname, directory=".buildbot", is_build_script_available, is_test_script_available):

@@ -0,0 +121,4 @@
+            "test_script_available": is_test_script_available(test_script_exists),
+            "repository": repository,
+            "branch": branch,
+            "jobname": jobname,

@@ -160,3 +57,2 @@
                 util.Property('branch'),
-                "https://buildbot.bitmessage.org",
-                util.Interpolate("%(prop:os_codename)s"),
+                util.getURLForBuild(util, util.Property("builderid"), util.Property("buildnumber")),

@@ -205,3 +98,2 @@
-        os_codename = sys.argv[5]
 
-        trigger_child_hooks(buildbotUrl, os_codename, repository, branch, jobname)
+        trigger_child_hooks(buildbotUrl, repository, branch, jobname, ".buildbot", is_build_script_available, is_test_script_available)

@@ -81,3 +22,1 @@
-            results.append(_)
-
-    return results
+os_codename='bionic'

@@ -202,10 +94,9 @@ if __name__ == "__main__":
         repository = sys.argv[2]
         branch = sys.argv[3]
         buildbotUrl = sys.argv[4]

@@ -205,3 +97,2 @@
-        os_codename = sys.argv[5]
 
-        trigger_child_hooks(buildbotUrl, os_codename, repository, branch, jobname)
+        trigger_child_hooks(buildbotUrl, repository, branch, ".buildbot")

@@ -208,3 +96,3 @@
     else:
         print(
-            "Usage: python3 multibuild.py <jobname> <repository> <branch> <buildbotUrl> <os_codename>"
+            "Usage: python3 multibuild.py <jobname> <repository> <branch> <buildbotUrl> "