Driving and Virtualizing Control Systems: the Open Source Approach Used in Whiterabbit
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Buildbot: a Continuous Integration System
Buildbot: A continuous integration system Krzysztof Voss January, 2013 Outline • Testing and Continuous Integration • Introduction to Buildbot • BuildMaster • BuildMaster components • BuildSlave • Installation and Usage 1 Testing and continuous integration Tests: • the best specification • safety-net for refactoring • bug identification Tests are the most effective if we: • run them often • run them on different machines/environments • can easily see their results 2 The most straightforward approach would entail: • logging in to different machines • fetching the newest source code • running tests • analyzing their output In case we want to test a few environments, repeating the above steps is tedious. Developers do not focus on the code, instead they run tests. A continuous integration system performs all of these steps for us, so developers can focus on their code. 3 Introduction to Buildbot: Features • run builds on a variety of BuildSlave platforms • arbitrary build process: handles projects using C, Python, . • minimal host requirements: python and Twisted • BuildSlave can be behind a firewall if they can still do checkout • status delivery through web page, email, IRC, other protocols • track builds in progress, provide estimated completion time • flexible configuration by subclassing generic build process classes 4 • debug tools to force a new build, submit fake Changes, query BuildSlave status • released under the GPL source: http://buildbot.net/buildbot/docs/current/manual/introduction.html 5 Introduction to Buildbot: Overview system overview source: http://buildbot.net/buildbot/docs/0.8.1/full.html 6 BuildMaster BuildMaster components source: http://buildbot.net/buildbot/docs/0.8.1/full.html 7 BuildMaster BuildMaster: • holds the configuration of the entire system. -
Analysis of Devops Tools to Predict an Optimized Pipeline by Adding Weightage for Parameters
International Journal of Computer Applications (0975 – 8887) Volume 181 – No. 33, December 2018 Analysis of DevOps Tools to Predict an Optimized Pipeline by Adding Weightage for Parameters R. Vaasanthi V. Prasanna Kumari, PhD S. Philip Kingston Research Scholar, HOD, MCA Project Manager SCSVMV University Rajalakshmi Engineering Infosys, Mahindra City, Kanchipuram College, Chennai Chennai ABSTRACT cloud. Now-a-days more than ever, DevOps [Development + Operations] has gained a tremendous amount of attention in 2. SCM software industry. Selecting the tools for building the DevOps Source code management (SCM) is a software tool used for pipeline is not a trivial exercise as there are plethora’s of tools development, versioning and enables team working in available in market. It requires thought, planning, and multiple locations to work together more effectively. This preferably enough time to investigate and consult other plays a vital role in increasing team’s productivity. Some of people. Unfortunately, there isn’t enough time in the day to the SCM tools, considered for this study are GIT, SVN, CVS, dig for top-rated DevOps tools and its compatibility with ClearCase, Mercurial, TFS, Monotone, Bitkeeper, Code co- other tools. Each tool has its own pros/cons and compatibility op, Darcs, Endevor, Fossil, Perforce, Rational Synergy, of integrating with other tools. The objective of this paper is Source Safe, and GNU Bazaar. Table1 consists of SCM tools to propose an approach by adding weightage to each with weightage. parameter for the curated list of the DevOps tools. 3. BUILD Keywords Build is a process that enables source code to be automatically DevOps, SCM, dependencies, compatibility and pipeline compiled into binaries including code level unit testing to ensure individual pieces of code behave as expected [4]. -
Integration of the Chromium Browser in the GENIVI Platform
static void _f_do_barnacle_install_properties(GObjectClass *gobject_class) { GParamSpec *pspec; Integration of the Chromium /* Party code attribute */ pspec = g_param_spec_uint64 (F_DO_BARNACLE_CODE, Browser in the GENIVI Platform "Barnacle code.", "Barnacle code", 0, G_MAXUINT64, G_MAXUINT64 /* default value */, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_PRIVATE); Jacobo Aragunde Pérez g_object_class_install_property (gobject_class, blogs.igalia.com/jaragunde F_DO_BARNACLE_PROP_CODE, ● Open Source experts and consultants ● 15 years of experience ● Important contributions to: ● Client-side web technologies: WebKit, Blink/Chromium, Servo ● Graphics & Multimedia: Mesa, GStreamer ● Compilers: V8, JavaScriptCore, SpiderMonkey, Guile ● Software-defined networking: Snabb ● ... Introduction Goals of the project ● Integrate full-featured Chromium browser in GDP ● Use Intel’s Ozone-Wayland project, most complete implementation of Wayland so far ● Get latest possible version of the browser working ● Analyze and fix multi-seat implementation, if required ● Funding: GENIVI challenge grant and Igalia contributions Elements and versions ● Chromium: latest stable release was 54 at that point ● Ozone-Wayland: latest branch supports Chromium 53 ● Meta-browser: supporting Chromium 48 ● GENIVI BSPs Rebase & integrate Chromium browser Work on meta-browser ● Simplify configuration ● Obsolete CHROMIUM_ENABLE_WAYLAND detection ● Build chromium+wayland version 53 ● Recipe was pointing to version 48 ● Required patch backport ● Fix specific build scenarios -
Studying Routing Issues in Vanets by Using NS-3 Bachelor Thesis on Informatics
Studying Routing Issues in VANETs by Using NS-3 Bachelor Thesis on Informatics by Christos Profentzas Thesis supervisor Dr. Periklis Chatzimisios Alexander Technological Educational Institute of Thessaloniki Department of Informatics A.T.E.I. of Thessaloniki P.O. Box 141 GR -547 00 Thessaloniki, Macedonia, Greece November 2012 i Acknowledgements This research project would not have been possible without the sup- port of many people. The author wishes to express his gratitude to his supervisor, Assistant Professor Periklis Chatzimisios (Alexan- der TEI of Thessaloniki, Greece) and Assistant Professor Gennaro Boggia (Politecnico di Bari, Italy) who was abundantly helpful and offered invaluable assistance, support and guidance. Deepest grati- tude are also due to the members of the supervisory committee, Assis- tant Professor Luigi Alfredo Grieco and Ph.D Student Giuseppe Piro without whose knowledge and assistance this study would not have been successful. Special thanks also to all group members of Telematics Lab at the Electrical & Electronics Engineering Depart- ment of Politecnico di Bari, for sharing the literature, invaluable assis- tance and laboratory facilities. The author would also like to convey thanks to the Office of Erasmus Program and Faculty of Alexander Technological Educational Institution of Thessaloniki for providing the financial means. Abstract A Vehicular Ad-hoc Network (VANET) is a system of nodes (vehi- cles) that are being connected with each other by wireless technolo- gies. Usually the nodes are moving with very high speeds and, thus, the topology is unpredictable and frequently changing. Such networks can be stand alone and making paths along vehicles or may be con- nected by an infrastructure internet. -
This Book Doesn't Tell You How to Write Faster Code, Or How to Write Code with Fewer Memory Leaks, Or Even How to Debug Code at All
Practical Development Environments By Matthew B. Doar ............................................... Publisher: O'Reilly Pub Date: September 2005 ISBN: 0-596-00796-5 Pages: 328 Table of Contents | Index This book doesn't tell you how to write faster code, or how to write code with fewer memory leaks, or even how to debug code at all. What it does tell you is how to build your product in better ways, how to keep track of the code that you write, and how to track the bugs in your code. Plus some more things you'll wish you had known before starting a project. Practical Development Environments is a guide, a collection of advice about real development environments for small to medium-sized projects and groups. Each of the chapters considers a different kind of tool - tools for tracking versions of files, build tools, testing tools, bug-tracking tools, tools for creating documentation, and tools for creating packaged releases. Each chapter discusses what you should look for in that kind of tool and what to avoid, and also describes some good ideas, bad ideas, and annoying experiences for each area. Specific instances of each type of tool are described in enough detail so that you can decide which ones you want to investigate further. Developers want to write code, not maintain makefiles. Writers want to write content instead of manage templates. IT provides machines, but doesn't have time to maintain all the different tools. Managers want the product to move smoothly from development to release, and are interested in tools to help this happen more often. -
Expert Python Programming Third Edition
Expert Python Programming Third Edition Become a master in Python by learning coding best practices and advanced programming concepts in Python 3.7 Michał Jaworski Tarek Ziadé BIRMINGHAM - MUMBAI Expert Python Programming Third Edition Copyright © 2019 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing or its dealers and distributors, will be held liable for any damages caused or alleged to have been caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. Commissioning Editor: Kunal Chaudhari Acquisition Editor: Chaitanya Nair Content Development Editor: Zeeyan Pinheiro Technical Editor: Ketan Kamble Copy Editor: Safis Editing Project Coordinator: Vaidehi Sawant Proofreader: Safis Editing Indexer: Priyanka Dhadke Graphics: Alishon Mendonsa Production Coordinator: Shraddha Falebhai First published: September 2008 Second edition: May 2016 Third edition: April 2019 Production reference: 1270419 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78980-889-6 www.packtpub.com To my beloved wife, Oliwia, for her love, inspiration, and her endless patience. -
Achieving a Safe and Seamless User Experience Through Accessible Web Applications
Achieving a Safe and Seamless User Experience Through Accessible Web Applications Alejandro Piñeiro Iglesias 2 Topics ● Accessibility-based solutions to improve safety ● Implementation via accessibility APIs ● Applicable standards and existing support Achieving a Safe and Seamless User Experience Through Accessible Web Applications Alejandro Piñeiro | [email protected] | www.igalia.com/accessibility Accessibility-Based Solutions to Improve` Safety 4 Safety First? 9 November 2012 8 November 2012 “Off-duty officer killed, Cal Trans “Police say a distracted driver caused flagger seriously hurt in chain a head-on crash.... The driver of the reaction crash.... Cal Trans said the second truck and his passenger had to accident was likely caused by a be extricated from the vehicle by distracted driver." firefighters." 3 November 2012 31 October 2012 “Authorities say a driver distracted “An eastern Utah man was charged by his cell phone caused a head-on Wednesday with hitting and killing a crash that killed an elderly man and Vernal teenager with his car while seriously injured an elderly woman in texting behind the wheel.” central California." Achieving a Safe and Seamless User Experience Through Accessible Web Applications Alejandro Piñeiro | [email protected] | www.igalia.com/accessibility 5 "In 2010, 3092 people were killed in crashes involving a distracted driver and an estimated additional 416,000 were injured in motor vehicle crashes involving a distracted driver." U.S. National Highway Traffic Safety Administration Achieving a Safe and Seamless User Experience Through Accessible Web Applications Alejandro Piñeiro | [email protected] | www.igalia.com/accessibility 6 Hands-Free via Speech Input For: ● Users who cannot use a keyboard and/or touch screen (i.e. -
Design and Implementation of a Continuous Integration System
Prakash Acharya DESIGN AND IMPLEMENTATION OF A CONTINUOUS INTEGRATION SYSTEM DESIGN AND IMPLEMENTATION OF A CONTINUOUS INTEGRATION SYSTEM Prakash Acharya Bachelor’s Thesis Spring 2019 Information Technology Oulu University of Applied Sciences ABSTRACT Oulu University of Applied Sciences Information Technology, Internet Services Author: Prakash Acharya Title of the bachelor’s thesis: Design and Implementation of a Continuous Integration System Supervisor: Lasse Haverinen Term and year of completion: Spring 2019 Number of pages: 43 Not having an automated test system in the software development process leaves space for errors to go unnoticed in code review, which can break a codebase if integrated. The aim of the Bachelor’s thesis was to design and implement a Continuous Integration system where tests and build tasks could be automated. The Buildbot framework was used as a Continuous Integration and automation framework. The Ansible playbook was used for automating the deployment of Buildbot configuration. The Buildbot configuration was created in such a way that it allows Buildbot instances to be created easily and in a configurable manner. In addition, automation of the Python static code analysis tool, Prospector, was added to the Continuous Integration system. The result of having a configurable Buildbot system was that the developers could start adding automation tasks and test and verify their change without affecting the production instance. Having an automated static code analysis run on changes brings into attention potential problems and error before they are integrated. Even though the Buildbot system is not taken into use, it was tested in a test environment and it is shown to work. -
Browsers for the Automotive: an Introduction to Webkit for Wayland
static void _f_do_barnacle_install_properties(GObjectClass *gobject_class) { GParamSpec *pspec; Browsers for the /* Party code attribute */ pspec = g_param_spec_uint64 (F_DO_BARNACLE_CODE, "Barnacle code.", "Barnacle code", automotive: an introduction 0, G_MAXUINT64, G_MAXUINT64 /* default value */, G_PARAM_READABLE | G_PARAM_WRITABLE | to WebKit for Wayland G_PARAM_PRIVATE); g_object_class_install_property (gobject_class, F_DO_BARNACLE_PROP_CODE, Silvia Cho [email protected] Igalia and WebKit/Chromium ● Open source consultancy founded in 2001 ● Top contributor to upstream WebKit and Chromium ● Working with many industry actors: tablets, phones, IVI, smart TV, set-top boxes, and smart home Outline ➢ Browser requirements for the automotive ➢ A bit of history ➢ Selecting the best alternatives Introduction to WebKit for Wayland ➢ Conclusions Browser requirements for the automotive Requirements ● Browser as an application and as a runtime: - User Experience: specific standards and UI modification - Portability: support of specific hardware boards (performance optimization) - OTA updates ● Browser as an application: - Functionalities ● Browser as a run time: - Application manager integration Available alternatives 1) Licensing a proprietary solution 2) Deriving a new browser from the main open source browser technologies: - Chromium - WebKit (Firefox: Mozilla removed support in their engine for third party browser developers) Understanding the main alternatives ● Decision between Chromium and WebKit ● Chromium and WebKit share a lot of history, -
Webkit and Blink: Bridging the Gap Between the Kernel and the HTML5 Revolution
WebKit and Blink: Bridging the Gap Between the Kernel and the HTML5 Revolution Juan J. Sánchez LinuxCon Japan 2014, Tokyo Myself, Igalia and WebKit Co-founder, member of the WebKit/Blink/Browsers team Igalia is an open source consultancy founded in 2001 Igalia is Top 5 contributor to upstream WebKit/Blink Working with many industry actors: tablets, phones, smart tv, set-top boxes, IVI and home automation. WebKit and Blink Juan J. Sánchez Outline 1 Why this all matters 2 2004-2013: WebKit, a historical perspective 2.1. The technology: goals, features, architecture, ports, webkit2, code, licenses 2.2. The community: kinds of contributors and contributions, tools, events 3 April 2013. The creation of Blink: history, motivations for the fork, differences and impact in the WebKit community 4 2013-2014: Current status of both projects, future perspectives and conclusions WebKit and Blink Juan J. Sánchez PART 1: Why this all matters WebKit and Blink Juan J. Sánchez Why this all matters Long time trying to use Web technologies to replace native totally or partially Challenge enabled by new HTML5 features and improved performance Open Source is key for innovation in the field Mozilla focusing on the browser WebKit and now Blink are key projects for those building platforms and/or browsers WebKit and Blink Juan J. Sánchez PART 2: 2004-2013 WebKit, a historical perspective WebKit and Blink Juan J. Sánchez PART 2.1 WebKit: the technology WebKit and Blink Juan J. Sánchez The WebKit project Web rendering engine (HTML, JavaScript, CSS...) The engine is the product Started as a fork of KHTML and KJS in 2001 Open Source since 2005 Among other things, it’s useful for: Web browsers Using web technologies for UI development WebKit and Blink Juan J. -
Splash Documentation Release 3.5
Splash Documentation Release 3.5 Scrapinghub Jun 16, 2020 Contents 1 Documentation 3 1.1 Installation................................................3 1.2 Splash HTTP API............................................6 1.3 Splash Scripts Tutorial.......................................... 18 1.4 Splash Lua API Overview........................................ 24 1.5 Splash Scripts Reference......................................... 26 1.6 Response Object............................................. 67 1.7 Request Object.............................................. 69 1.8 Element Object.............................................. 71 1.9 Working with Binary Data........................................ 87 1.10 Available Lua Libraries......................................... 88 1.11 Splash and Jupyter............................................ 95 1.12 FAQ.................................................... 97 1.13 Contributing to Splash.......................................... 102 1.14 Implementation Details......................................... 103 1.15 Changes................................................. 105 i ii Splash Documentation, Release 3.5 Splash is a javascript rendering service. It’s a lightweight web browser with an HTTP API, implemented in Python 3 using Twisted and QT5. The (twisted) QT reactor is used to make the service fully asynchronous allowing to take advantage of webkit concurrency via QT main loop. Some of Splash features: • process multiple webpages in parallel; • get HTML results and/or take screenshots; • turn -
HTML5 Apps on AGL Platform with the Web Application Manager
HTML5 apps on AGL platform with the Web Application Manager Julie Kim jkim@ Automotive Linux Summit Japan July in 2019 Agenda ● Introduction ○ About Igalia ○ Motivations ○ Chromium ○ Web Application Manager (WAM) ● What we’ve done ○ Integration with AGL ○ Try WebApps ● Plans Introduction About Igalia ● Open Source Consultancy ● Based in Galicia, Spain. Global team and customers ● ~81 employees around the world ● Areas ○ Chromium/Blink, WebKit and Servo; W3C member ○ Compilers, JavaScript engines (V8, JSC) ○ Multimedia, Kernel, Networking, Graphics ○ Virtualization & Cloud Motivations ● Web apps should be first class citizens in AGL; bring flexibility and power for a big number of developers. ● Chromium has been verified on several embedded devices; many manufactures use it as an WebEngine. ● Chromium with wayland is working fine on upstream; Igalia has worked on it. ● LGE open-sourced Web Application Manager which they’re using on their product. Motivations; Risks ● How to manage SMACK with Chromium Multi-process model? ○ Using proxy process ● How to integrate on AGL? ○ Porting it with libhomescreen and libwindowmanager ● How to support Wayland with ivi extension protocol? ○ Migration wayland port with chromium upstream ○ Adding ivi extension protocol Chromium Multiprocess ● Browser process ○ handles all interactions with the disk, network, user input, and display. ○ manages windows and tabs. ● Renderer process ○ contains all the complex logic for handling HTML, JavaScript, CSS, images, and so on. ● GPU process ○ Manages GPU operations.