START-INFO-DIR-ENTRY * Maintaining: (maintain). Maintaining GNU software. END-INFO-DIR-ENTRY Information for maintainers of GNU software. Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. Permission is granted to make and distribute verbatim copies of this document, provided the copyright notice and this permission notice are preserved on all copies. Version ******* Last updated November 9, 2000. About This Document ******************* This file contains guidelines and advice for someone who is the maintainer of a GNU program on behalf of the GNU Project. Everyone is entitled to change and redistribute GNU software; you need not pay attention to this file to get permission. But if you want to maintain a version for widespread distribution, we suggest you follow these guidelines; if you would like to be a GNU maintainer, then it is essential to follow these guidelines. Please send corrections or suggestions for this document to
. If you make a suggestion, please include a suggested new wording for it, to help us consider the suggestion efficiently. We prefer a context diff to the `maintain.texi' file, but if you don't have that file, you can make a context diff for some other version of this document, or propose it in any way that makes it clear. This document uses the gender-neutral third-person pronouns "person", "per", "pers" and "perself" which were promoted, and perhaps invented, by Marge Piercy in `Woman on the Edge of Time'. They are used just like "she", "her", "hers" and "herself", except that they apply equally to males and females. For example, "Person placed per new program under the GNU GPL, to let the public benefit from per work, and to enable per to feel person has done the right thing." The directory `/gd/gnuorg' is found on the GNU machines; if you are the maintainer of a GNU package, you should have an account on them. Contact if you don't have one. (You can also ask for accounts for people who help you a large amount in working on the package.) `/gd/gnu/maintain.tar.gz' is a tar file containing all of these files in that directory which are mentioned in this file; it is updated daily. This release of the GNU Maintenance Instructions was last updated November 9, 2000. Stepping Down ************* With good forture, you will continue maintaining your package for many decades. But sometimes for various reasons maintainers decide to step down. If you're the official maintainer of a GNU package and you decide to step down, please inform the GNU Project (). We need to know that the package no longer has a maintainer, so we can look for and appoint a new maintainer. If you have an idea for who should take over, please tell your suggestion. The appointment of a new maintainer needs the GNU Project's confirmation, but your judgement that a person is capable of doing the job will carry a lot of weight. Recruiting Helpers ****************** Unless your package is a fairly small, you probably won't do all the work on it yourself. Most maintainers recruit helpers, and often people offer to help. Some of the people who offer to help will be capable, while others will not. It's up to you to determine who provides useful help, and encourage those people to participate more. Some of the people who offer to help will support the GNU Project, while others may be interested for other reasons. Some will support the goals of the Free Software Movement, but some may not. They are all welcome to help with the work--we don't ask people's views or motivations before they contribute to GNU packages. As a consequence, you cannot expect all contributors to support the GNU Project, or to have a concern for its policies and standards. So part of your job as maintainer is to exercise your authority on these points when they arise. No matter how much of the work other people do, you and not they are in charge of what goes in the release. When a crucial point arises, you should calmly state your decision and stick to it. Sometimes a package has several co-maintainers who share the role of maintainer. Unlike helpers, co-maintainers have actually been appointed jointly as the maintainers of the package, and they carry out the maintainer's functions together. If you would like to propose some of your helpers as co-maintainers, please contact . Legal Matters ************* This chapter describes procedures you should follow for legal reasons as you maintain the program, to avoid legal difficulties. Recording Contributors ====================== *Keep correct records of which portions were written by whom.* This is very important. These records should say which files, or parts of files, were written by each person, and which files or portions were revised by each person. But they don't need to be as detailed as a change log. They don't need to distinguish work done at different times, only different people. They don't need describe changes in more detail than which files or parts of a file were changed. And they don't need to say anything about the function or purpose of a file or change-the Register of Copyrights doesn't care what the text does, just who wrote or contributed to which parts. You need not list someone who has contributed just a few lines (less than 15) of minor changes, but keep in mind that a series of minor changes can add up to a significant contribution that does need to be listed. The list should also mention if certain files distributed in the same package are really a separate program. For example, this would describe an early version of GAS: Dean Elsner first version of all files except gdb-lines.c and m68k.c. Jay Fenlason entire files gdb-lines.c and m68k.c, most of app.c, plus extensive changes in messages.c, input-file.c, write.c and revisions elsewhere. Note: GAS is distributed with the files obstack.c and obstack.h, but they are considered a separate package, not part of GAS proper. Please keep these records in a file named `AUTHORS' in the source directory for the program itself. Copyright Papers ================ If you maintain an FSF-copyrighted package, then you should follow certain legal procedures when incorporating changes written by other people. This ensures that the FSF has the legal right to distribute the package, and the right to defend its free status in court if necessary. *Before* incorporating significant changes, make sure that the person who wrote the changes has signed copyright papers and that the Free Software Foundation has received and signed them. To check whether papers have been received, look in `/gd/gnuorg/copyright.list'. If you can't look there directly, can check for you. Our clerk can also check for papers that are waiting to be entered and inform you when expected papers arrive. The directory `/gd/gnuorg' is found on the GNU machines; if you are the maintainer of a GNU package, you should have an account on them. Contact if you don't have one. (You can also ask for accounts for people who help you a large amount in working on the package.) In order for the contributor to know person should sign papers, you need to ask for the necessary papers. If you don't know per well, and you don't know that person is used to our ways of handling copyright papers, then it might be a good idea to raise the subject with a message like this: Would you be willing to assign the copyright to the Free Software Foundation, so that we could install it in PROGRAM? or Would you be willing to sign a copyright disclaimer to put this change in the public domain, so that we can install it in PROGRAM? If the contributor wants more information, you can send per `/gd/gnuorg/conditions.text', which explains per options (assign vs. disclaim) and their consequences. Once the conversation is under way and the contributor is ready for more details, you should send one of the templates that are found in `/gd/gnuorg'. This section explains which templates you should use in which circumstances. *Please don't use any of the templates except for those listed here, and please don't change the wording.* Once the conversation is under way, you can send the contributor the precise wording and instructions by email. Before you do this, make sure to get the current version of the template you will use! We change these templates occasionally--don't keep using an old version. For large changes, ask the contributor for an assignment. Send per a copy of the file `/gd/gnuorg/request-assign.changes'. For medium to small changes, request a disclaimer by sending per the file `/gd/gnuorg/request-disclaim.changes'. If the contributor is likely to keep making changes, person might want to sign an assignment for all per future changes to the program. So it is useful to offer per that alternative. If person wants to do it that way, send per the `/gd/gnuorg/request-assign.future'. When you send a `request-' file, you don't need to fill in anything before sending it. Just send the file verbatim to the contributor. The file gives per instructions for how to ask the FSF to mail per the papers to sign. For less common cases, we have template files you should send to the contributor. Be sure to fill in the name of the person and the name of the program in these templates, where it says NAME OF PERSON and NAME OF PROGRAM, before sending; otherwise person might sign without noticing them, and the papers would be useless. Note that in some templates there is more than one place to put the name of the program or the name of the person; be sure to change all of them. You do not need to ask for separate papers for a manual that is distributed only in the software package it describes. But if we sometimes distribute the manual separately (for instance, if we publish it as a book), then we need separate legal papers for changes in the manual. For smaller changes, use `/gd/gnuorg/disclaim.changes.manual'; for larger ones, use `/gd/gnuorg/assign.changes.manual'. To cover both past and future changes to a manual, you can use `/gd/gnuorg/assign.future.manual'. If a contributor is reluctant to sign an assignment for a large change, and is willing to sign a disclaimer instead, that is acceptable, so you should offer this alternative if it helps you reach agreement. We prefer an assignment for a larger change, so that we can enforce the GNU GPL for the new text, but a disclaimer is enough to let us use the text. If you maintain a collection of programs, occasionally someone will contribute an entire separate program or manual that should be added to the collection. Then you can use the files `request-assign.program', `disclaim.program', `assign.manual', and `disclaim.manual'. We very much prefer an assignment for a new separate program or manual, unless it is quite small, but a disclaimer is acceptable if the contributor insists on handling the matter that way. *Although there are other templates besides the ones listed here, they are for special circumstances; please do not use them without getting advice from .* If you are not sure what to do, then please ask for advice; if the contributor asks you questions about the meaning and consequences of the legal papers, and you don't know the answers, you can forward them to and we will answer. *Please do not try changing the wording of a template yourself. If you think a change is needed, please talk with , and we will work with a lawyer to decide what to do.* Copyright Notices ================= You should maintain a legally valid copyright notice in each nontrivial file of the program, including makefiles, scripts, and other data files used in building or running the program. (Any file more than ten lines long is nontrivial for this purpose.) Documentation files also should have copyright notices. A copyright notice looks like this: Copyright YEAR1, YEAR2, YEAR3 COPYRIGHT-HOLDER The COPYRIGHT-HOLDER may be the Free Software Foundation, Inc., or someone else; you should know who is the copyright holder for your package. The list of year numbers should include each year in which you finished preparing a version which was actually released, and which was an ancestor of the current version. Please reread the paragraph above, slowly and carefully. It is important to understand that rule precisely, much as you would understand a complicated C statement in order to hand-simulate it. This list is _not_ a list of years in which versions were _released_. It is a list of years in which versions, later released, were _completed_. So if you finish a version on Dec 31, 1994 and release it on Jan 1, 1995, this version requires the inclusion of 1994, but doesn't require the inclusion of 1995. Do not abbreviate the year list using a range; do not write `1996--1998' instead of `1996, 1997, 1998'. The versions that matter, for purposes of this list, are versions that were ancestors of the current version. So if you made a temporary branch in maintenance, and worked on branches A and B in parallel, then each branch would have its own list of years, which is based on the versions released in that branch. A version in branch A need not be reflected in the list of years for branch B, and vice versa. However, if you copy code from branch A into branch B, the years for branch A (or at least, for the parts that you copied into branch B) do need to appear in the list in branch B, because now they are ancestors of branch B. This rule is complicated. If we were in charge of copyright law, we would probably change this (as well as many other aspects). For an FSF-copyrighted package, if you have followed the procedures to obtain legal papers, each file should have just one copyright holder: the Free Software Foundation, Inc. So the copyright notice should give that name. But if contributors are not all assigning their copyrights to a single copyright holder, it can easily happen that one file has several copyright holders. Each contributor of nontrivial amounts is a copyright holder. In that case, you should always include a copyright notice in the name of main copyright holder of the file. You can also include copyright notices for other copyright holders as well, and this is a good idea for those who have contributed a large amount and for those who specifically ask for notices in their names. But you don't have to include a notice for everyone who contributed to the file, and that would be rather inconvenient. License Notices =============== In each file that has a copyright notice or notices, a license notice _must_ follow. (Without a license notice giving permission to copy and change the file, copying and modification are legally prohibited, and that would make the file non-free.) Typically the license notice should look like this: This file is part of GNU PROGRAM GNU PROGRAM is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU PROGRAM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with PROGRAM; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. But in a small program which is just a few files, you can use this instead: This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Documentation files should have license notices also. Manuals should use the GNU Free Documentation License. Here is an example of the license notice to use after the copyright notice. Please adjust the list of invariant sections as appropriate for your manual. (If there are none, then say "with no invariant sections".) Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with the Invariant Sections being "GNU General Public License", the Front-Cover texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the section entitled "GNU Free Documentation License". (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development. If the FSF does not publish this manual on paper, then omit the last sentence that talks about copies published by the FSF. If the FSF is not the copyright holder, then replace `FSF' with the appropriate name. Short manuals (under 300 lines long) and rough documentation can use simple all-permissive licenses. But note that when you distribute several manuals together in one software package, they can share a single copy of the GFDL (see section 6). If you would like help with license issues or with using the GFDL, please contact . External Libraries ================== When maintaining an FSF-copyrighted GNU package, sometimes you will want to use a general-purpose free software module which offers a useful functionality, as a "library" facility (though the module is not always packaged technically as a library). In a case like this, it would be unreasonable to ask the author of that module to assign the copyright to the FSF. After all, person did not write it specifically as a contribution to your package, so it would be impertinent to ask him, out of the blue, "Please give the FSF your copyright." So the thing to do in this case is to make your program use the module, but not consider it a part of your program. There are two reasonable methods of doing this: 1. Assume the module is already installed on the system, and use it when linking your program. This is only reasonable if the module really has the form of a library. 2. Include the module in your package, putting the source in a separate subdirectory whose `README' file says, "This is not part of the GNU FOO program, but is used with GNU FOO." Then set up your makefiles to build this module and link it into the executable. For this method, it is not necessary to treat the module as a library and make a `.a' file from it. You can link with the `.o' files directly in the usual manner. Please use these methods as infrequently as possible, because they create an irregularity and we have been told to minimize the amount of irregularity. So consider them only for general-purpose modules that were written for other uses and released separately. For anything that was written as a contribution to your package, please get papers signed. Cleaning Up Changes ******************* Don't feel obligated to include every change that someone asks you to include. You must judge which changes are improvements--partly based on what you think the users will like, and partly based on your own judgement of what is an improverment. If you think a change is not good, you should reject it. If someone sends you a change which is useful, but written in an ugly way or hard to understand and maintain in the future, don't hesitate to ask person to clean up per changes before you merge them. Since the amount of work we can do is limited, the more we convince others to help us work efficiently, the faster GNU will advance. If the contributor will not or can not make the changes clean enough, then it is legitimate to say "I can't install this in its present form; I can only do so if you clean it up." Invite per to distribute per changes another way, or to find other people to make them clean enough for you to install and maintain. The only reason to do these cleanups yourself is if (1) it is easy, less work than telling the author what to clean up, or (2) the change is an important one, important enough to be worth the work of cleaning it up. The GNU Coding Standards are a good thing to send people when you ask them to clean up changes (*note Contents: (standards)Top.). The Emacs Lisp manual contains an appendix that gives coding standards for Emacs Lisp programs; it is good to urge authors to read it (*note Tips and Standards: (elisp)Tips.). Dealing With Mail ***************** Once a program is in use, you will get bug reports for it. Most GNU programs have their own special lists for sending bug reports. The advertised bug-reporting email address should always be address@hidden', to help show users that the program is a GNU package, but it is ok to set up that list to forward to another site for further forwarding. The package distribution should state the name of the bug-reporting list in a prominent place, and ask users to help us by reporting bugs there. We also have a catch-all list, , which is used for all GNU programs that don't have their own specific lists. But nowadays we want to give each program its own bug-reporting list and move away from using