- Add an analyze method on triggers that, when given trigger config, will attempt to analyze the trigger's Dockerfile and determine what pull credentials, if any, are needed and available

- Move the build trigger setup UI into its own directive (makes things cleaner)
- Fix a bug in the entitySearch directive around setting the current entity
- Change the build trigger setup UI to use the new analyze method and flow better

util/dockerfileparse.py

@@ -0,0 +1,72 @@
+import re
+
+LINE_CONTINUATION_REGEX = re.compile('\s*\\\s*\n')
+COMMAND_REGEX = re.compile('([A-Z]+)\s(.*)')
+
+COMMENT_CHARACTER = '#'
+
+class ParsedDockerfile(object):
+  def __init__(self, commands):
+    self.commands = commands
+
+  def get_commands_of_kind(self, kind):
+    return [command for command in self.commands if command['command'] == kind]
+
+  def get_base_image(self):
+    image_and_tag = self.get_base_image_and_tag()
+    if not image_and_tag:
+      return None
+
+    # Note:
+    # Dockerfile images references can be of multiple forms:
+    #   server:port/some/path
+    #   somepath
+    #   server/some/path
+    #   server/some/path:tag
+    #   server:port/some/path:tag
+    parts = image_and_tag.strip().split(':')
+
+    if len(parts) == 1:
+        # somepath
+        return parts[0]
+
+    # Otherwise, determine if the last part is a port
+    # or a tag.
+    if parts[-1].find('/') >= 0:
+      # Last part is part of the hostname.
+      return image_and_tag
+
+    return '/'.join(parts[0:-1])
+
+  def get_base_image_and_tag(self):
+    from_commands = self.get_commands_of_kind('FROM')
+    if not from_commands:
+      return None
+
+    return from_commands[0]['parameters']
+
+
+def strip_comments(contents):
+  lines = [line for line in contents.split('\n') if not line.startswith(COMMENT_CHARACTER)]
+  return '\n'.join(lines)
+
+def join_continued_lines(contents):
+  return LINE_CONTINUATION_REGEX.sub('', contents)
+
+def parse_dockerfile(contents):
+  contents = join_continued_lines(strip_comments(contents))
+  lines = [line for line in contents.split('\n') if len(line) > 0]
+
+  commands = []
+  for line in lines:
+    m = COMMAND_REGEX.match(line)
+    if m:
+      command = m.group(1)
+      parameters = m.group(2)
+
+      commands.append({
+        'command': command,
+        'parameters': parameters
+      })
+
+  return ParsedDockerfile(commands)