Benefits of open source development and open tools. Max Horn, August 31, 2011
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1 Benefits of open source development and open tools Max Horn, August 31, 2011
2 Overview Introduction Open source Why care? How to be open Tools, tools, tools My background What does open source mean, anyway? Why should you care? How to be open and make the best out of it? Tools, tools, tools August 31, 2011 Max Horn Benefits of open source development and open tools Page 2
3 Overview Introduction Open source Why care? How to be open Tools, tools, tools My background What does open source mean, anyway? Why should you care? How to be open and make the best out of it? Tools, tools, tools August 31, 2011 Max Horn Benefits of open source development and open tools Page 3
4 Who am I Introduction Open source Why care? How to be open Tools, tools, tools Math PhD 2009, Involutions of Kac-Moody groups Currently working in computer algebra, esp. GAP Writing code for 20+ years, primarily for Mac and Unix Involved in open source since 1999 Contributed (in small and big ways) to many open source projects, e.g. ScummVM, Fink, TeXShop, SDL, SourceForge.net, XMPP chat,... Also worked as IT freelancer in the industry for a few years August 31, 2011 Max Horn Benefits of open source development and open tools Page 4
5 Who am I Introduction Open source Why care? How to be open Tools, tools, tools Math PhD 2009, Involutions of Kac-Moody groups Currently working in computer algebra, esp. GAP Writing code for 20+ years, primarily for Mac and Unix Involved in open source since 1999 Contributed (in small and big ways) to many open source projects, e.g. ScummVM, Fink, TeXShop, SDL, SourceForge.net, XMPP chat,... Also worked as IT freelancer in the industry for a few years August 31, 2011 Max Horn Benefits of open source development and open tools Page 4
6 Who am I Introduction Open source Why care? How to be open Tools, tools, tools Math PhD 2009, Involutions of Kac-Moody groups Currently working in computer algebra, esp. GAP Writing code for 20+ years, primarily for Mac and Unix Involved in open source since 1999 Contributed (in small and big ways) to many open source projects, e.g. ScummVM, Fink, TeXShop, SDL, SourceForge.net, XMPP chat,... Also worked as IT freelancer in the industry for a few years August 31, 2011 Max Horn Benefits of open source development and open tools Page 4
7 Who am I Introduction Open source Why care? How to be open Tools, tools, tools Math PhD 2009, Involutions of Kac-Moody groups Currently working in computer algebra, esp. GAP Writing code for 20+ years, primarily for Mac and Unix Involved in open source since 1999 Contributed (in small and big ways) to many open source projects, e.g. ScummVM, Fink, TeXShop, SDL, SourceForge.net, XMPP chat,... Also worked as IT freelancer in the industry for a few years August 31, 2011 Max Horn Benefits of open source development and open tools Page 4
8 Who am I Introduction Open source Why care? How to be open Tools, tools, tools Math PhD 2009, Involutions of Kac-Moody groups Currently working in computer algebra, esp. GAP Writing code for 20+ years, primarily for Mac and Unix Involved in open source since 1999 Contributed (in small and big ways) to many open source projects, e.g. ScummVM, Fink, TeXShop, SDL, SourceForge.net, XMPP chat,... Also worked as IT freelancer in the industry for a few years August 31, 2011 Max Horn Benefits of open source development and open tools Page 4
9 Who am I Introduction Open source Why care? How to be open Tools, tools, tools Math PhD 2009, Involutions of Kac-Moody groups Currently working in computer algebra, esp. GAP Writing code for 20+ years, primarily for Mac and Unix Involved in open source since 1999 Contributed (in small and big ways) to many open source projects, e.g. ScummVM, Fink, TeXShop, SDL, SourceForge.net, XMPP chat,... Also worked as IT freelancer in the industry for a few years August 31, 2011 Max Horn Benefits of open source development and open tools Page 4
10 Example: ScummVM Project started in 2001, project (co-)lead About 40 active developers in 2011; over 200 all-time 1.3M lines of code (mostly C++) 1.2M downloads in the past twelve months Highly portable: Unix, OS X, Windows, phones, game consoles,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 5
11 Example: ScummVM Project started in 2001, project (co-)lead About 40 active developers in 2011; over 200 all-time 1.3M lines of code (mostly C++) 1.2M downloads in the past twelve months Highly portable: Unix, OS X, Windows, phones, game consoles,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 5
12 Example: ScummVM Project started in 2001, project (co-)lead About 40 active developers in 2011; over 200 all-time 1.3M lines of code (mostly C++) 1.2M downloads in the past twelve months Highly portable: Unix, OS X, Windows, phones, game consoles,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 5
13 Example: ScummVM Project started in 2001, project (co-)lead About 40 active developers in 2011; over 200 all-time 1.3M lines of code (mostly C++) 1.2M downloads in the past twelve months Highly portable: Unix, OS X, Windows, phones, game consoles,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 5
14 Example: ScummVM Project started in 2001, project (co-)lead About 40 active developers in 2011; over 200 all-time 1.3M lines of code (mostly C++) 1.2M downloads in the past twelve months Highly portable: Unix, OS X, Windows, phones, game consoles,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 5
15 Overview Introduction Open source Why care? How to be open Tools, tools, tools My background What does open source mean, anyway? Why should you care? How to be open and make the best out of it? Tools, tools, tools August 31, 2011 Max Horn Benefits of open source development and open tools Page 6
16 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
17 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
18 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
19 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
20 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
21 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
22 What does open source mean, anyway? You probably already have an idea of what open source means but let s make sure we are on the same page here! Wikipedia says: The term open source describes practices in production and development that promote access to the end product s source materials. Some consider open source a philosophy, others consider it a pragmatic methodology. Applied to software, this leads to open source sofware; for example: Linux (kernel), OpenOffice, but also Sage, GAP, Singular, CoCoA,... Usually assumed to mean access to the complete source for everybody Various licenses exists that are meant to ensure this from a legal point (BSD, GNU General Public License v2 and v3, and many more) August 31, 2011 Max Horn Benefits of open source development and open tools Page 7
23 Open source goes beyond software Introduction Open source Why care? How to be open Tools, tools, tools Most people associated open source with software alone but there is much more to it. E.g. open source hardware (OpenSPARC T1 processor, Arduino,... ) August 31, 2011 Max Horn Benefits of open source development and open tools Page 8
24 Open source goes beyond software Introduction Open source Why care? How to be open Tools, tools, tools Most people associated open source with software alone but there is much more to it. E.g. open source hardware (OpenSPARC T1 processor, Arduino,... ) August 31, 2011 Max Horn Benefits of open source development and open tools Page 8
25 Open source goes beyond software Introduction Open source Why care? How to be open Tools, tools, tools Most people associated open source with software alone but there is much more to it. E.g. open source hardware (OpenSPARC T1 processor, Arduino,... ) August 31, 2011 Max Horn Benefits of open source development and open tools Page 8
26 Open source goes beyond software Introduction Open source Why care? How to be open Tools, tools, tools Most people associated open source with software alone but there is much more to it. E.g. open source hardware (OpenSPARC T1 processor, Arduino,... ) August 31, 2011 Max Horn Benefits of open source development and open tools Page 8
27 Open source goes beyond software Introduction Open source Why care? How to be open Tools, tools, tools Most people associated open source with software alone but there is much more to it. E.g. open source hardware (OpenSPARC T1 processor, Arduino,... )... and beverages! August 31, 2011 Max Horn Benefits of open source development and open tools Page 8
28 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
29 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
30 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
31 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
32 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
33 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
34 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
35 Publications = open source? Introduction Open source Why care? How to be open Tools, tools, tools Research publications (in math) are similar to open source: The theorems in a paper are the product. The proofs and lemmas are the source, and they are shipped along with the product. Being open allows the community to advance much quicker: Standing on the shoulders of giants Now imagine we would only ship the product, not the source! For individuals, this can be tempting, e.g. to hinder competition but for the community it is a big loss. August 31, 2011 Max Horn Benefits of open source development and open tools Page 9
36 Overview Introduction Open source Why care? How to be open Tools, tools, tools My background What does open source mean, anyway? Why should you care? How to be open and make the best out of it? Tools, tools, tools August 31, 2011 Max Horn Benefits of open source development and open tools Page 10
37 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
38 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
39 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
40 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
41 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
42 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
43 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. Alnuth 2.x (GAP package) needs KASH 2.5 August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
44 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. Alnuth 2.x (GAP package) needs KASH 2.5 August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
45 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. Alnuth 2.x (GAP package) needs KASH 2.5 August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
46 Benefits of open source We saw what is good about open source publications. For software, it is similar: Releasing your code allows others to learn from it... and sometimes to improve on it... and to build upon it. Again: Standing on the shoulders of giants Trust: No software is bug-free. No source = no idea of what is going on. Allows code to live on even after author lost interest in (or time for) it. Alnuth 2.x (GAP package) needs KASH 2.5 Alnuth 3.0 uses open source Pari/GP August 31, 2011 Max Horn Benefits of open source development and open tools Page 11
47 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
48 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
49 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
50 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
51 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
52 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
53 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
54 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
55 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
56 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
57 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
58 The dark side But what if my code gets stolen? The possibility exists, no denying it but not more so than for research ideas and papers. Same countermeasures generally work well: Legal protection via copyright (remember those licenses?); peer review. Example: ScummVM (GPL v2) illegally sold as part of software for Nintendo Wii... But my code is so ugly, I don t want to show it, and nobody will be able to read it anyway! But my proof is so ugly, I don t want to publish it. Your code might not be as bad as you think. Maybe you should improve it then, anyway? Maybe others will help improving it if your tool is useful to them? August 31, 2011 Max Horn Benefits of open source development and open tools Page 12
59 Users are a valuable resource Introduction Open source Why care? How to be open Tools, tools, tools Users August 31, 2011 Max Horn Benefits of open source development and open tools Page 13
60 Users are a valuable resource Introduction Open source Why care? How to be open Tools, tools, tools Users Algebraists August 31, 2011 Max Horn Benefits of open source development and open tools Page 13
61 Users are a valuable resource Introduction Open source Why care? How to be open Tools, tools, tools Users Computer experts August 31, 2011 Max Horn Benefits of open source development and open tools Page 13
62 Users are a valuable resource Introduction Open source Why care? How to be open Tools, tools, tools Users Algebraists Computer experts August 31, 2011 Max Horn Benefits of open source development and open tools Page 13
63 Users are a valuable resource Introduction Open source Why care? How to be open Tools, tools, tools Users potential co-developers? Algebraists Computer experts August 31, 2011 Max Horn Benefits of open source development and open tools Page 13
64 Users are a valuable resource Introduction Open source Why care? How to be open Tools, tools, tools potential contributors! Users potential co-developers? Algebraists Computer experts August 31, 2011 Max Horn Benefits of open source development and open tools Page 13
65 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
66 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
67 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
68 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
69 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
70 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
71 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
72 Beyond open source: Open development We saw the technical definition of open source but for many, it means much more: An open development process! This means for example: everybody can see the current code at all times, not just for releases; discussions and planning is done in the open, everybody can chime in; everybody can submit code patches. Does not mean everybody gets the same say; your past track record is import ( meritocracy ). August 31, 2011 Max Horn Benefits of open source development and open tools Page 14
73 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
74 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
75 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
76 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
77 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
78 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
79 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
80 The Cathedral and the Bazaar Introduction Open source Why care? How to be open Tools, tools, tools The Cathedral and the Bazaar an essay by Eric S. Raymond on software engineering methods. The Cathedral model: Top-down design; source code is available with each software release, but access to code developed between releases is restricted. (Past) examples: GNU Emacs, GCC, GAP,... The Bazaar model: Bottom-up design; code is developed over the Internet in view of the public. Examples: Linux, Sage, ScummVM,... Release early. Release often. And listen to your customers. Linus Law: Given enough eyeballs, all bugs are shallow. Both approaches have pros and cons. The trick is to find the right mix! August 31, 2011 Max Horn Benefits of open source development and open tools Page 15
81 Overview Introduction Open source Why care? How to be open Tools, tools, tools My background What does open source mean, anyway? Why should you care? How to be open and make the best out of it? Tools, tools, tools August 31, 2011 Max Horn Benefits of open source development and open tools Page 16
82 Making the best out of your version control system (VCS) Every non-trivial software project should use a VCS repository! Are you??? Helps with understanding the code and its past ( history mining ) Helps tracking down regressions Whom should I ask about this code? What has changed since the last release? August 31, 2011 Max Horn Benefits of open source development and open tools Page 17
83 Making the best out of your version control system (VCS) Every non-trivial software project should use a VCS repository! Are you??? Helps with understanding the code and its past ( history mining ) Helps tracking down regressions Whom should I ask about this code? What has changed since the last release? August 31, 2011 Max Horn Benefits of open source development and open tools Page 17
84 Making the best out of your version control system (VCS) Every non-trivial software project should use a VCS repository! Are you??? Helps with understanding the code and its past ( history mining ) Helps tracking down regressions Whom should I ask about this code? What has changed since the last release? August 31, 2011 Max Horn Benefits of open source development and open tools Page 17
85 Making the best out of your version control system (VCS) Every non-trivial software project should use a VCS repository! Are you??? Helps with understanding the code and its past ( history mining ) Helps tracking down regressions Whom should I ask about this code? What has changed since the last release? August 31, 2011 Max Horn Benefits of open source development and open tools Page 17
86 Making the best out of your version control system (VCS) Every non-trivial software project should use a VCS repository! Are you??? Helps with understanding the code and its past ( history mining ) Helps tracking down regressions Whom should I ask about this code? What has changed since the last release? August 31, 2011 Max Horn Benefits of open source development and open tools Page 17
87 Making the best out of your version control system (VCS) Every non-trivial software project should use a VCS repository! Are you??? Helps with understanding the code and its past ( history mining ) Helps tracking down regressions Whom should I ask about this code? What has changed since the last release? August 31, 2011 Max Horn Benefits of open source development and open tools Page 17
88 ... so open up your VCS! Introduction Open source Why care? How to be open Tools, tools, tools For open development, your repository should be readable by anybody, anytime! Users see whether the project is still active. Users see where the project is heading. Yup, sometimes that includes dead ends but users can be taught about that, too. August 31, 2011 Max Horn Benefits of open source development and open tools Page 18
89 ... so open up your VCS! Introduction Open source Why care? How to be open Tools, tools, tools For open development, your repository should be readable by anybody, anytime! Users see whether the project is still active. Users see where the project is heading. Yup, sometimes that includes dead ends but users can be taught about that, too. August 31, 2011 Max Horn Benefits of open source development and open tools Page 18
90 ... so open up your VCS! Introduction Open source Why care? How to be open Tools, tools, tools For open development, your repository should be readable by anybody, anytime! Users see whether the project is still active. Users see where the project is heading. Yup, sometimes that includes dead ends but users can be taught about that, too. August 31, 2011 Max Horn Benefits of open source development and open tools Page 18
91 ... so open up your VCS! Introduction Open source Why care? How to be open Tools, tools, tools For open development, your repository should be readable by anybody, anytime! Users see whether the project is still active. Users see where the project is heading. Yup, sometimes that includes dead ends but users can be taught about that, too. August 31, 2011 Max Horn Benefits of open source development and open tools Page 18
92 ... so open up your VCS! Introduction Open source Why care? How to be open Tools, tools, tools For open development, your repository should be readable by anybody, anytime! Users see whether the project is still active. Users see where the project is heading. Yup, sometimes that includes dead ends but users can be taught about that, too. August 31, 2011 Max Horn Benefits of open source development and open tools Page 18
93 Avoid high entry barriers Introduction Open source Why care? How to be open Tools, tools, tools GAP is a really cool project, with a friendly and helpful community! But to an outsider, GAP development is opaque GAP download page: Contrary to appearance, GAP is very much alive but if you are not already inside, there is no way of knowing that The only public reference to GAP CVS I could find is So how do you get (read) access to the GAP CVS? Just ask! But... do you dare to? Who is eligible? high entry barrier for potential contributors My dream: Open repository, bug tracker, development discussion,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 19
94 Avoid high entry barriers Introduction Open source Why care? How to be open Tools, tools, tools GAP is a really cool project, with a friendly and helpful community! But to an outsider, GAP development is opaque GAP download page: Contrary to appearance, GAP is very much alive but if you are not already inside, there is no way of knowing that The only public reference to GAP CVS I could find is So how do you get (read) access to the GAP CVS? Just ask! But... do you dare to? Who is eligible? high entry barrier for potential contributors My dream: Open repository, bug tracker, development discussion,... August 31, 2011 Max Horn Benefits of open source development and open tools Page 19
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