Реализовал таск раннер. Работает, но команды выполняются дважды

scripts/IosSteps.txt

@@ -0,0 +1 @@
+sh echo hello from Rustam

scripts/SettingsProvider/FromFileSettingsProvider.py

@@ -4,7 +4,7 @@ from parser.SettingsParser.SettingsParser import SettingsParser
 
 class FromFileSettingsProvider:
 	def fetchSettings(self):
-		settingsFile = open('settings.txt')
+		settingsFile = open('scripts/settings.txt')
 		content = settingsFile.read()
 
 		parser = SettingsParser()

scripts/StepRunner/StepsRunner.py

@@ -0,0 +1,27 @@
+from CommandBuilders.ShCommandBuilder import ShCommandBuilder
+
+
+class StepsRunner:
+	def __init__(self):
+		self.shCommandBuilder = ShCommandBuilder()
+
+	def run(self, content):
+		assert content is not None
+
+		lines = content.splitlines()
+		for line in lines:
+			stripped = line.strip(' \t\n\r')
+
+			if len(stripped) == 0:
+				continue
+			if stripped.startswith("#"):
+				continue
+
+			self.processLine(stripped)
+
+	def processLine(self, line):
+		if self.shCommandBuilder.isShCommand(line):
+			cmd = self.shCommandBuilder.getCommandFor(line)
+			cmd.execute()
+		else:
+			raise Exception('unrecognised step')

scripts/StepRunner/__init__.py

@@ -0,0 +1 @@
+__author__ = 'rzaitov'

scripts/buildRunner.py

@@ -1,12 +0,0 @@
-from SettingsProvider.FromFileSettingsProvider import FromFileSettingsProvider
-from utils.configs.BuildConfigProvider import BuildConfigProvider
-
-settingsProvider = FromFileSettingsProvider()
-settings = settingsProvider.fetchSettings()
-
-buildReadyConfigs = []
-configsProvider = BuildConfigProvider()
-configsProvider.getBuildReadyConfigs(settings, buildReadyConfigs)
-
-for bc in buildReadyConfigs:
-	print bc

scripts/settings.txt

@@ -3,10 +3,10 @@ build_tool = '/Applications/Xamarin\ Studio.app/Contents/MacOS/mdtool'
 version = '0.0.0'
 
 # ios platform settings
-ios.steps = 'IosSteps.txt'
+ios.steps = 'scripts/IosSteps.txt'
 
 # android platform settings
-android.steps = 'AndroidSteps.txt'
+# android.steps = 'AndroidSteps.txt'
 
 # config settings
 ios.appstore.build_ready = 'true'

scripts/taskRunner.py

@@ -0,0 +1,38 @@
+import os
+scriptFilePath = os.path.abspath(__file__)
+
+scriptDir = os.path.dirname(scriptFilePath)
+baseDir = os.path.join(scriptDir, os.pardir)
+
+os.chdir(baseDir)
+
+from SettingsProvider.FromFileSettingsProvider import FromFileSettingsProvider
+from StepRunner.StepsRunner import StepsRunner
+from utils.configs.BuildConfigProvider import BuildConfigProvider
+
+class TaskRunner:
+	def run(self):
+		settingsProvider = FromFileSettingsProvider()
+		settings = settingsProvider.fetchSettings()
+
+		configsProvider = BuildConfigProvider()
+		buildReadyConfigs = configsProvider.getConfigs(settings)
+
+		for bc in buildReadyConfigs:
+			self.runConfig(bc)
+
+	def runConfig(self, config):
+		content = self.getStepsContent(config)
+
+		stepsRunner = StepsRunner()
+		stepsRunner.run(content)
+
+	def getStepsContent(self, config):
+		pathToSteps = config['steps']
+		stepsFile = open(pathToSteps)
+
+		content = stepsFile.read()
+		return content
+
+runner = TaskRunner()
+runner.run()