Software Development Tools and Frameworks Kick-Off Meeting

Total Page:16

File Type:pdf, Size:1020Kb

Software Development Tools and Frameworks Kick-Off Meeting Software Development Tools and Frameworks Kick-off meeting René Schönfelder Institute for Software Engineering and Programming Languages October 17, 2013 http://www.isp.uni-luebeck.de/courses/ws-20132014/ seminar-software-development-tools-and-frameworks. R. Schönfelder October 17, 2013 1/39 Agenda Motivation Science Planning Topics Assignments R. Schönfelder October 17, 2013 2/39 Why this seminar? I What is quality of software? I What is science? R. Schönfelder October 17, 2013 3/39 Agenda Motivation Science Planning Topics Assignments R. Schönfelder October 17, 2013 4/39 What is science? Immanuel Kant: I “Eine jede Lehre, wenn sie ein System, d.i. ein nach Principien geordnetes Ganze der Erkenntniß, sein soll, heißt Wissenschaft, . ” Simply put: Science = Research + Teaching R. Schönfelder October 17, 2013 5/39 What is science? Qualification goals (Module Guide): I The students can obtain a solid grounding a scientific topic. I They are able to present the results in a written documentation and in a talk in an understandable way. I The can present and discuss a scientific topic in English. This seminar shall prepare you for your bachelor’s thesis. R. Schönfelder October 17, 2013 6/39 What is science? (Actually, there is a corresponding english page, but the guide lines are still in german.) R. Schönfelder October 17, 2013 7/39 Good scientific practice For example: I respect for intellectual property, I to document results, I to consequently doubt all results yourself, I mentoring the young academics, I strict honesty with any kind of contributions, I the backup and safe-keeping of any primary data, I scientific publications. R. Schönfelder October 17, 2013 8/39 Scientific Literature How to find scientific literature? I Zentrale Hochschulbibliothek Lübeck (http://www.zhb.uni-luebeck.de/) I ACM Digital Library (http://portal.acm.org/dl.cfm) I Springer (http://www.springerlink.com/) I IEEE Xplore (http://ieeexplore.ieee.org/Xplore/home.jsp) I CiteSeer (http://citeseer.ist.psu.edu/) I Google Scholar (http://scholar.google.de/) Not appropriate: I Wikipedia, Heise, and other websites Access via university network or SSL gate (http://sslgate.uni-luebeck.de/) I http://www.zhb.uni-luebeck.de/onlinemed.html Advice: Search for survey article, e.g. book chapters and dissertations. R. Schönfelder October 17, 2013 9/39 Scientific Literature How to read scientific literature? 1. Read the title and the abstract I Is this paper of any interest for my work? 2. Take a look at pictures and read the conclusions I What is the approach, what is the essential contribution? I Is it still interesting for me? 3. Read thoroughly I What is the exact reasoning? I What is the connection to my work? I What do I miss in this paper? 4. Write a summary (do not skip this step!) I What are essential contributions? I How do I need to cite this paper? I Which questions are not yet solved? R. Schönfelder October 17, 2013 10/39 Scientific Literature How to cite? Look up the following things (or ask your advisor) . I scientific writing, I where to find literature, I rules of citation, I how to cite internet resources, I what is BibTex? R. Schönfelder October 17, 2013 11/39 Agenda Motivation Science Planning Topics Assignments R. Schönfelder October 17, 2013 12/39 Expectations We expect from you: I Search for scientific literature I Writing a scientific paper I Writing a review I Attendence and participation I Presentation of your topic R. Schönfelder October 17, 2013 13/39 Scientific paper Formal requirements: I Use the template from the website. I Number of pages between 8 and 10. I Labels in images and tables should match the font of the document. I Images should have a high enough resolution. With respect to the content, we expect you to: I outline the academic (and economic) interest, I present a clean and comprehensible structure, I cite correctly and completely, I give an overview on the literature, I describe informative things easy to understand, I respect the guide lines of good scientific practice. R. Schönfelder October 17, 2013 14/39 Review Your review (one page at most) will contain: I Information about you as a reviewer I Short summary I General comments I Well structured? I Approach is clear? I Complete? I Good overview on literature? I Well written and comprehensible? I “Roter Faden”? (translation?) I Does it convince you? I Constructive citicism I Typos, if they stand out Always remember: Stick to the facts, your name is on the review! R. Schönfelder October 17, 2013 15/39 Presentation Your presentation should: I be 30 minutes long (plus 10 minutes discussion), I be practiced beforehand, I include the vita of VIPs (if appropriate), I be easily comprehensable but also informative, I incorporate the audience, I have more images than text, I not be your paper pressed into beamer slides, and I end with an open question for discussion. R. Schönfelder October 17, 2013 16/39 Scheduling The schedule is similar to that of a scientific conference: I Assignment of topics (30.07.) I Familiarization phase (during semester break) I Personal coaching with your advisor (beginning of the semester) I Writing phase (deadline 22.11. - it’s my birthday!) I Review phase and preparation of your presentation (before 06.12.) I Improvement phase (deadline 13.12.) I Presentations (19.12. and 20.12. - 08:00 to 17:00) I Christmas R. Schönfelder October 17, 2013 17/39 Publication With your participation you agree, that I your paper and your presentation slides will be published to I your fellow students (within this course) I and to ISP members. R. Schönfelder October 17, 2013 18/39 Agenda Motivation Science Planning Topics Assignments R. Schönfelder October 17, 2013 19/39 Overview 0. Introduction 1. Revision Control 2. Project Management 3. Distributed Bugtrackers 4. Build and Dependency Tools 5. Artifact Repository 6. Continuous Integration 7. Web Server 8. Application Server 9. Agile Development 10. Usability Engineering 11. Static Code Analysis 12. Code Reviews 13. Documentation Tools 14. UML Tools 15. Test Driven Development 16. Test Generation R. Schönfelder October 17, 2013 20/39 Revision Control Research questions: I What is version numbering? I Which modify concepts are there? I What is a workflow and which are used? http://flossmole.org/content/revision-control-matrix-june-2011 R. Schönfelder October 17, 2013 21/39 Project Management Research questions: I How do project management tools improve software development? I What is scalability and how to ensure? I Which are the essential features of a project management tool? Some representatives are: Redmine, Trac, JIRA, Rhodecode, . (http://www.denizon.com/project-management/) R. Schönfelder October 17, 2013 22/39 Distributed Bugtrackers Research questions: I How to manage and resolve bugs? I Which states and priorities are there? I How to integrate a bugtracker into a development process? Some representatives are: Artemis, Bugs Everywhere, . (http://www.bubblews.com/assets/images/news/1320729416_1370345820.jpg) R. Schönfelder October 17, 2013 23/39 Build and Dependency Tools Research questions: I What is a build and how to resolve dependencies? I What is a lifecycle and why are there standards? I What are build plugins and how to write one? (http://zeroturnaround.com/rebellabs/developer-productivity-report-2012-java-tools-tech-devs-and-data/) R. Schönfelder October 17, 2013 24/39 Artifact Repository Research questions: I What is an artifact? I Why do artifacts need to be managed? I How to create my own repository? Some representatives are: Nexus, Artifactory, Archiva, . (http://www.jfrog.com/home/v_ecosystem_integration) R. Schönfelder October 17, 2013 25/39 Continuous Integration Research questions: I What is the integration hell and what is continuous integration? I How to orchestrate different tools in the development process? I Which best practices have established? Some representatives are: Jenkins, Continuum, Go, Hudson, . (http://jenkins-ci.org/) R. Schönfelder October 17, 2013 26/39 Web Server I How to develop good and modern web sites? I How can we assure quality in the web? I Which kind of technology are there? Some representatives are: Tomcat, Jetty, . R. Schönfelder October 17, 2013 27/39 Application Server I Which kind of web services are there? I What is service oriented architecture and how to modularize? I How does communication work? Some representatives are: WildFly, JBoss, Glassfish, . (http://www.wildfly.org/images/splash_wildflylogo.png) R. Schönfelder October 17, 2013 28/39 Agile Development Research questions: I What is agile development and who benefits from it? I How does Scrum work in practice? I How could Scrum be implemented in scientific projects? (http://blog.seibert-media.net/2012/10/15/99-argumente-fuer-scrum-was-scrum-projekte-dem-kunden-bringen/) R. Schönfelder October 17, 2013 29/39 Usability Engineering Research questions: I What is usability engineering? I How to integrate it within the development process? I What are the benefits? (http://www.imis.uni-luebeck.de/de/forschung/user-usability-engineering-fuer-softwaresysteme-oeffentlichen- verwaltungen) R. Schönfelder October 17, 2013 30/39 Static Code Analysis Research questions: I How to measure software quality? I What is a software map? I How does static code analysis influence the development process? Some representatives are: findbugs, emma, cobertura, checkstyle, . (http://www.softwarediagnostics.com/transparency-platform/) R. Schönfelder October 17, 2013 31/39 Code Reviews Research questions: I What are code reviews? I How to embed code reviews into the development process? I What are the “social effects” that may occur? Some representatives are: Gerrit, Atlassian, AgileReview, . R. Schönfelder October 17, 2013 32/39 Dokumentationswerkzeuge Research questions: I Why and how should I document? I How to document collaboratively? I What is a good project documentation? Some representatives are: Javadoc, Doxygen, Wiki, Confluence, .
Recommended publications
  • The Cons of Git and Mercurial Taking Control of Your CV Automated End-To-End Testing
    Issue June 2015 | presented by www.jaxenter.com #45 The digital magazine for enterprise developers Trust in Rust 1.0 The cons of Git and Mercurial Slowing down peer reviews Taking control of your CV Where to get the best programming experiences Automated End-to-End Testing ... and way more tips and tutorials ©iStockphoto.com/highhorse Editorial Get more experience What makes a good programmer? Every developer will on a tour of the new release of Rust 1.0, still fresh off the give you a different answer. But assuming you already have a shelves. In the testing section, Claire Fautsch and Daniel Wit- combination of talent, education and fortunate social circum- kowski are walking us through automated end-to-end test- stances, what else is it that will guarantee you a bright career ing and handy open-source testing tools. From the Big Data in IT? Is there some combination of special ingredients needed world, we have Pierre Fricke showing us the new Foreign Data for a CV to impress employers? If you ask Shutterstock’s Di- Wrappers in Postgres. If you’re interested in FinTech, Lars rector of Engineering, the one thing that really counts is real Markull is predicting big things for Banking Service Providers. life development experience. “To gain real world skills, de- Meanwhile, we’re also taking at look at how to avoid hiccups velopers have to create and take control of their own curricu- when moving to a new version of Oracle SOA or a distributed lum,” writes Sandeep Chouksey in this latest issue, explaining version control system like Git or Mercurial.
    [Show full text]
  • Awesome Selfhosted - Software Development - Project Management
    Awesome Selfhosted - Software Development - Project Management Software Development - Project Management See also: awesome-sysadmin/Code Review Bonobo Git Server - Set up your own self hosted git server on IIS for Windows. Manage users and have full control over your repositories with a nice user friendly graphical interface. ( Source Code) MIT C# Fossil - Distributed version control system featuring wiki and bug tracker. BSD-2-Clause- FreeBSD C Goodwork - Self hosted project management and collaboration tool powered by Laravel & VueJS. (Demo, Source Code) MIT PHP Gitblit - Pure Java stack for managing, viewing, and serving Git repositories. (Source Code) Apache-2.0 Java gitbucket - Easily installable GitHub clone powered by Scala. (Source Code) Apache-2.0 Scala/Java Gitea - Community managed fork of Gogs, lightweight code hosting solution. (Demo, Source Code) MIT Go GitLab - Self Hosted Git repository management, code reviews, issue tracking, activity feeds and wikis. (Demo, Source Code) MIT Ruby Gitlist - Web-based git repository browser - GitList allows you to browse repositories using your favorite browser, viewing files under different revisions, commit history and diffs. ( Source Code) BSD-3-Clause PHP Gitolite - Gitolite allows you to setup git hosting on a central server, with fine-grained access control and many more powerful features. (Source Code) GPL-2.0 Perl GitPrep - Portable Github clone. (Demo, Source Code) Artistic-2.0 Perl Git WebUI - Standalone web based user interface for git repositories. Apache-2.0 Python Gogs - Painless self-hosted Git Service written in Go. (Demo, Source Code) MIT Go Kallithea - Source code management system that supports two leading version control systems, Mercurial and Git, with a web interface.
    [Show full text]
  • Programming on the Phone
    Programming on the phone Programming on the phone why do people ask such a question? People are increasingly starting to ask a question, how is programming on the phone? Maybe convenient or not? Probably every beginner programmer who seeks knowledge and wants to program everywhere and always asked himself all these questions. Of course, this was influenced by such a rapid development of technology. For a short period of time, typewriters were replaced by laptops and PCs that can solve very complex problems. If we look at the development of phones in general, they also began to develop very quickly. At first, touch phones were not taken as they should, but now such a smartphone is an integral part of every person. This is the answer to the question: “Programming on the phone where do people get such questions and thoughts.” Almost everyone who is somehow familiar with programming will say that programming on Android or Apple smartphones is extremely inconvenient and unnecessary. • Math homework • Java homework • Python homework • C/C++ assignment They will be partly right, but this is still possible and let's figure out how and why? Programming on the phone will we figure it out? Programming on the phone is a long and complicated process, which does not bring as much pleasure and inspiration as with the same programming on a PC or laptop. However, it is not rare that it is not possible to take a laptop with you, and you need to complete the task or just want to program. In such cases, the phone can help out.
    [Show full text]
  • Code Review Quality
    Code Review Quality Defining a good code review Overview Introduction: A modern code review process The importance of reviews for QA Strength and weaknesses Tools to make (better) reviews VCS: Git - Keeping track of changes. Gerrit: State of the art for git VCS. Continuous inspection: SonarQube How to define „good“? Factors to assess review quality Case study: How Developers see it Improve Review Quality Current research Defining a good code review 2 What is a modern code review process INTRODUCTION Defining a good code review 3 Introduction A modern review process Defining a good code review 4 Introduction The review value - strengths Coding standards compliance . Code review helps to maintain consistent coding style across the company . Reviews find high level breaches of design rules and consistency issues. Finding subtile bugs and defects early . A person is able to find logical flaws and approach problems, that might be very hard to find with tests. when they are cheap to fix. (Before submitting) Teaching and sharing knowledge . During review team members gain better understanding of the code base and learn from each other Strengthens team cohesion . Review discussions save team members from isolation and bring them closer to each other. Defining a good code review 5 Introduction The review value - weaknesses Highly depends on reviewer's experience and code familiarity . Study showed that the ‘worst’ reviewer can be ten times less effective than the best reviewer. The defect coverage is hard to asses . They might find a lot of different sorts of issues while overlook some potentially serious ones. Has a frustration and conflict potential .
    [Show full text]
  • Devops & Software Development Tools
    DevOps & Software Development Tools Competitive Landscape and Market Trends v2.3 – December 2018 Shea & Company DevOps & Software Development Tools Market Trends & Landscape The DevTools Market Has Reemerged ◼ Back in 2011, Marc Andreessen somewhat famously wrote “software is eating the world,” putting forward the belief we’re in the midst of a dramatic technological shift in which software-defined companies are poised to dominate large swathes of the economy. Over the intervening six years, accelerated by the cloud and a growing comfort with outsourcing human activates to machines, software has become ubiquitous. With examples like Amazon displacing traditional retailers or a proprietary “Today's large John Deere tractors have application for player evaluation named “Carmine” helping to lead the Boston Red Sox more lines of code than early space to three titles since 2004, the power of software cannot be understated. shuttles.” Samuel Allen (CEO, Deere & Company) ◼ Software is not only disrupting business models in place for centuries (or 86 years of baseball futility), but it also is enabling incumbent vendors across disparate industries to improve product offerings, drive deeper engagement with customers and optimize selling and marketing efforts. Most industries (financial services, retail, entertainment, healthcare) and large organizations now derive a great deal of their competitive differentiation from software. As Andreessen wrote, “the days when a car aficionado could repair his or her own car are long past, due primarily to the high software “Software is like entropy. It is difficult to content.” grasp, weighs nothing and obeys the second law of thermodynamics; i.e., it ◼ But as software has brought benefits, it has also brought increasing demands for always increases.” business agility – and the software industry itself has been changed.
    [Show full text]
  • Thematic Cycle 2: Software Development Table of Contents
    THEMATIC CYCLE 2: SOFTWARE DEVELOPMENT THEMATIC CYCLE 2: SOFTWARE DEVELOPMENT TABLE OF CONTENTS 1. SDLC (software development life cycle) tutorial: what is, phases, model -------------------- 4 What is Software Development Life Cycle (SDLC)? --------------------------------------------------- 4 A typical Software Development Life Cycle (SDLC) consists of the following phases: -------- 4 Types of Software Development Life Cycle Models: ------------------------------------------------- 6 2. What is HTML? ----------------------------------------------------------------------------------------------- 7 HTML is the standard markup language for creating Web pages. -------------------------------- 7 Example of a Simple HTML Document---------------------------------------------------------------- 7 Exercise: learn html using notepad or textedit ---------------------------------------------------- 11 Example: ---------------------------------------------------------------------------------------------------- 13 The <!DOCTYPE> Declaration explained ------------------------------------------------------------ 13 HTML Headings ---------------------------------------------------------------------------------------------- 13 Example: ---------------------------------------------------------------------------------------------------- 13 HTML Paragraphs ------------------------------------------------------------------------------------------- 14 Example: ----------------------------------------------------------------------------------------------------
    [Show full text]
  • Quest Software Inc
    ApexSQL® Source Control 2021.x Release Notes These release notes provide information about the ApexSQL® Source Control 2021.x which is a major release. Topics: ● About ApexSQL Source Control ● New features ● Getting Started ● System requirements ● Supported platforms ● Product licensing ● Release History ● About us About ApexSQL Source Control ApexSQL Source Control is a SQL Server Management Studio add-in to version control SQL databases and objects. It integrates with all major source control systems and allows database developers to work together on a shared or a dedicated database copy. ApexSQL Source Control provides full object versioning features such as object locking with team policies management, detailed view of changes history, conflict resolution, labeling, and more. New Features This version of ApexSQL Source Control introduces the following new features, enhancements or deprecations: Enhancements: ApexSQL Source Control 1 Release Notes Performance of the Action center tab has been improved up to 280% New framework object for both development models is added Additional ignore comparison options are added under the Script options tab: o Server and database names in synonyms o Next filegroups in partition schemas Additional synchronization options are added under the Script options tab: o Include dependent objects o Script USE for database Static data resolve conflict support New ApexSQL Updater allows users to configure advanced updating settings of all installed ApexSQL products Application telemetry now collects
    [Show full text]
  • Kallithea Documentation Release 0.7.99
    Kallithea Documentation Release 0.7.99 Kallithea Developers May 27, 2021 Contents 1 Readme 3 2 Administrator guide 7 3 User guide 51 4 Developer guide 79 i ii Kallithea Documentation, Release 0.7.99 • genindex • search Contents 1 Kallithea Documentation, Release 0.7.99 2 Contents CHAPTER 1 Readme 1.1 Kallithea README 1.1.1 About Kallithea is a fast and powerful management tool for Mercurial and Git with a built-in push/pull server, full text search and code-review. It works on HTTP/HTTPS and SSH, has a built-in permission/authentication system with the ability to authenticate via LDAP or ActiveDirectory. Kallithea also provides simple API so it’s easy to integrate with existing external systems. Kallithea is similar in some respects to GitHub or Bitbucket, however Kallithea can be run as standalone hosted application on your own server. It is open-source and focuses more on providing a customised, self-administered interface for Mercurial and Git repositories. Kallithea works on Unix-like systems and Windows. Kallithea was forked from RhodeCode in July 2014 and has been heavily modified. 1.1.2 Installation Kallithea requires Python 3 and it is recommended to install it in a virtualenv. Official releases of Kallithea can be installed with: pip install kallithea The development repository is kept very stable and used in production by the developers – you can do the same. Please visit https://docs.kallithea-scm.org/en/latest/installation.html for more details. There is also an experimental Puppet module for installing and setting up Kallithea. Currently, only basic functionality is provided, but it is still enough to get up and running quickly, especially for people without Python background.
    [Show full text]
  • Kallithea Documentation Release 0.3.1
    Kallithea Documentation Release 0.3.1 Kallithea Developers Apr 12, 2017 Contents 1 Kallithea README 3 2 Installation overview 9 3 Installation on Unix/Linux 11 4 Installation and upgrade on Windows (7/Server 2008 R2 and newer) 15 5 Installation and upgrade on Windows (XP/Vista/Server 2003/Server 2008) 21 6 Installing Kallithea on Microsoft Internet Information Services (IIS) 27 7 Setup 29 8 Installation and setup using Puppet 41 9 General Kallithea usage 45 10 Version control systems support 49 11 Repository locking 51 12 Repository statistics 53 13 Email settings 55 14 Optimizing Kallithea performance 57 15 Backing up Kallithea 59 16 Debugging Kallithea 61 17 Troubleshooting 63 18 Contributing to Kallithea 65 19 Translations 69 20 Changelog 73 i 21 API 75 22 The models module 93 23 Other topics 99 Python Module Index 101 ii Kallithea Documentation, Release 0.3.1 Readme Contents 1 Kallithea Documentation, Release 0.3.1 2 Contents CHAPTER 1 Kallithea README About Kallithea is a fast and powerful management tool for Mercurial and Git with a built-in push/pull server, full text search and code-review. It works on http/https and has a built in permission/authentication system with the ability to authenticate via LDAP or ActiveDirectory. Kallithea also provides simple API so it’s easy to integrate with existing external systems. Kallithea is similar in some respects to GitHub or Bitbucket, however Kallithea can be run as standalone hosted application on your own server. It is open-source donationware and focuses more on providing a customised, self- administered interface for Mercurial and Git repositories.
    [Show full text]
  • A Large-Scale Empirical Study of Security Patches
    Session J3: Problematic Patches CCS’17, October 30-November 3, 2017, Dallas, TX, USA A Large-Scale Empirical Study of Security Patches Frank Li Vern Paxson {frankli, vern}@cs.berkeley.edu University of California, Berkeley and International Computer Science Institute ABSTRACT the patch development process and the characteristics of the result- Given how the “patching treadmill” plays a central role for enabling ing fixes. Illuminating the nature of security patch development sites to counter emergent security concerns, it behooves the secu- can inform us of shortcomings in existing remediation processes rity community to understand the patch development process and and provide insights for improving current practices. characteristics of the resulting fixes. Illumination of the nature of se- Seeking such understanding has motivated several studies ex- curity patch development can inform us of shortcomings in existing ploring various aspects of vulnerability and patching life cycles. remediation processes and provide insights for improving current Some have analyzed public documentation about vulnerabilities, practices. In this work we conduct a large-scale empirical study of such as security advisories, to shed light on the vulnerability dis- security patches, investigating more than 4,000 bug fixes for over closure process [14, 32]. These studies, however, did not include 3,000 vulnerabilities that affected a diverse set of 682 open-source analyses of the corresponding code bases and the patch develop- software projects. For our analysis we draw upon the National ment process itself. Others have tracked the development of specific Vulnerability Database, information scraped from relevant external projects to better understand patching dynamics [18, 28, 41].
    [Show full text]
  • Mining Software Repositories to Determine the Impact of Team Factors on the Structural Attributes of Software
    Mining Software Repositories to Determine the Impact of Team Factors on the Structural Attributes of Software Ahmmad Youssef Supervisors: Dr. Andrea Capiluppi Prof. Tracy Hall Department of Computer Science Brunel University, London This dissertation is submitted for the degree of Doctor of Philosophy June 2019 Declaration I hereby declare that, except where specific reference is made to the work of others, the con- tents of this thesis is original and has not been submitted in whole or in part for consideration for any other degree or qualification in this, or any other, University. This thesis is theresult of my own work and includes nothing which is the outcome of work done in collaboration, except where specifically indicated in the text. Ahmmad Youssef June 2019 Acknowledgements I would first like to express my immense gratitude and appreciation to Dr. Andrea Cappiluppi for his unwavering patience, encouragement, and commitment while supervising this work. I have grown as a researcher, a professional, and as a person and that is due to his mentorship over the past decade. I would also like to thank Prof. Tracy Hall and Prof. Cornelia Boldyreff for their invaluable input that has made this research undoubtedly more robust and, in the process, enhanced my skills as a researcher. My thanks are also due to my examiners, Prof. Steve Counsell and Dr. Michel Wermelinger for their diligent and constructive feedback and for making my thesis defense a truly enjoyable process. Last but certainly not least, a great debt of gratitude is due to my family. My grandmother and my parents were tireless in their support of this work and my loving wife made personal sacrifices to allow me the platform to take this research to its successful conclusion.
    [Show full text]
  • Github Business Model Analysis ELU 605: Écologie Du Logiciel
    GitHub Business Model Analysis ELU 605: Écologie du Logiciel Fred Gonsalves, Jie Song June 17, 2018 1 Introduction The purpose of this paper is to serve as a continuation of our previous study on the intellectual property of GitHub, the largest web-based code sharing platform in the world. Since the writing of the previous paper, GitHub has officially been purchased by Microsoft for $7.5 billion [1] and this paper will seek to understand the business model that made GitHub attractive enough of a venture for such a sale to happen. As a quick introduction, let us discuss who GitHub is. Table 1 below gives us some of the latest statistics concerning GitHub. GitHub was founded in 2007 by three partners - Chris Wanstrath, Tom Preston-Werner, and P. J. Hyett. It was written in Ruby and was the first code sharing plat- form to provide distributed version control (using Git), as opposed to a centralized version control system being offered by major competitors at the time SourceForge, GoogleCode, and CodePlex. This meant that developers could clone an entire instance of a project and merge modifications much easier than ever before. GitHub’s popularity grew exponentially fast as evidenced by Fig- ure1. In addition to using Git, GitHub is also popular today for a number of other services it provides that are discussed in the following section. Number of users (2017) 24 million Number of total organizations (2017) 1.5 million Number of active repositories (since Sep, 2016) 13 million Number of total monthly visitors (2015) 32 million Table 1: GitHub in numbers [2].
    [Show full text]