Difference between revisions of "DeveloperGuide"

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This page describes guidelines developers with push access to the Wesnoth repository should follow. Most items apply to prospective contributors as well, in addition to the [[PatchSubmissionGuidelines|patch submission guidelines]].
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__TOC__
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== General ==
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{{NewDevsGoHereSidebox}}
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* [[WesnothRepository#Push_access|Set up developer access to the repository]], if applicable.
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* Participate in the #development channel on [https://discord.gg/battleforwesnoth Discord] as well as #wesnoth-dev IRC channel on irc.libera.chat to coordinate with other developers. Bots report commits and regression testing status, and other developers may ask you questions or provide feedback.
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== Commits ==
 
== Commits ==
* Setting up developer access to the repository: [[WesnothRepository#Commit_access]]
 
* Register to commit mailing list: https://mail.gna.org/listinfo/wesnoth-commits or get the list moderator to approve commit messages from you otherwise
 
* Trunk should compile and work after commit -- we use travis-ci, which will report any build failures on master to the irc channel. https://travis-ci.org/wesnoth/wesnoth
 
* All unit tests should pass after commit -- travis will also test this. To run the C++ unit tests, compile the "test" executable and run it. To run the WML unit tests, run "run_wml_tests -u" in the root of the repo.
 
** If a test times out, and it isn't related to your code, you can restart the build by
 
*** clicking on the link posted to irc by the travis bot, and
 
*** clicking on the [http://i.imgur.com/mxwVKJP.png restart button]
 
* Few small commits are better than a big one (hard to review), so when possible split it in working parts with info about where you are going
 
* Be on #wesnoth-dev IRC channel and coordinate with other developers. Bots report commits and some devs may ask you a question about it.
 
* Don't forget changelogs: ''changelog'' for any (significant enough) changes and ''player_changelog'' for changes visible to users.
 
* Always check your changes before commit (see [[WesnothRepository#Reviewing your changes]]).
 
* Commit message:
 
** Mention any change, especially if some are unrelated to the main one (but you should use separated commits for this).
 
** Mention "bug #1234" for automatic cc to that gna bug number
 
** Mention a developer's IRC name will ping him on IRC (when the bot report it), and if he's not there, he may see it on the IRC logs
 
  
== Bugs management ==
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* Any given branch should <b>compile without warnings</b> and run after every commit -- we use Github Actions, which will report any build failures on master and maintenance branches (1.12, 1.14, etc.) to the #development Discord channel.
* Change status of fixed bugs to "Fixed" when committed
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* All <b>unit tests</b> should pass after commit -- the CI will also test this. To run the C++ unit tests on your own machine, compile the "boost_unit_tests" executable and run it. To run the WML unit tests, run <code>run_wml_tests -u</code> in the checkout root.
* Change status of fixed bugs to "Closed" when released, see [[ReportingBugs#Bug_protocol]] for details
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* Do <b>not</b> disable or ignore unit tests without a very good reason!
* Check if there is new bugs relevant to your code and if any, assign them to you.
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* A few small commits are better than a single large commit (which is hard to review), so when possible split it in working parts with info about where you are going
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* <b>Always</b> review your changes, both before committing locally and before pushing upstream (see [[WesnothRepository#Reviewing your changes]]).
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* <b>Never</b> use the "force" option when pushing to the upstream Wesnoth repositories (see [[WesnothRepository#Force-pushing_policy]]).
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=== Changelog and release notes ===
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We provide a <b>changelog</b> at the root of the Wesnoth distribution and Git checkouts. It contains all changes, except for those that are only relevant to mainline developers and which are not expected to impact players or creators in any way.
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It is your responsibility to update the changelog as you see fit for every commit. To avoid any chance of merge conflicts due to the changelog, it is recommended to add a file to the changelog_entries folder at the root of the repository rather than updating the changelog directly.
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=== Commit messages ===
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A good commit should not only contain good changes, but also include a helpful description of them for other developers, people tracking regressions, project maintainers, and even yourself in the future. There are many style guides on the Web describing best practices for documenting your Git commits.
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For Wesnoth in particular, the general consensus is that contributors should adhere to the following rules:
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* Every commit message should begin with a self-contained <b>summary/subject line</b> no more than 72 characters long. This is the first (and often the only) line someone using browsing tools will see. Like with email subjects, this line should not have a trailing stop.
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* If your message needs more than a leading summary line, separate it from the rest with a blank line.
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* Subsequent lines should also be no more than 72 characters long. Use blank lines to separate paragraphs and list items.
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* When working on a mainline campaign/scenario, start the commit message with its acronym. For example <code>HttT: </code> when working on HttT in general and <code>HttT S03: </code> if the commit only applies to the third scenario of HttT (see below).
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* Likewise, if you work on the code of a specific component, you may want to use it as a prefix. That is e.g., <code>gui2: </code> or <code>wesnothd: </code>.
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* If you are performing branch merges, Git may include a list of conflicted paths in the commit message template. Edit this out; it ceases to be interesting after the conflicts have been resolved.
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* If you need to mention commit SHA1 hashes (e.g. in revert messages), make sure to use hashes from the upstream repository that are unlikely to change due to a future local or remote merge or rebase operation.
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There are a few additional points to keep in mind for the wording of the contents:
  
== Tips ==
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* Include "bug #1234" somewhere in your commit message if it addresses a bug or feature request from the Wesnoth bug tracker.
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* Use the project's [[Glossary#Wesnothian_Acronyms|standard abbreviations]] for campaigns and gameplay concepts, like HttT for <cite>Heir to the Throne</cite>, ZoC for "Zone of Control", etc. If referring to a particular campaign or scenario in your commit subject, you should use this convention: "HttT S01: Made Galdrad less suicidal"
  
* If you build with scons, use clang rather than gcc, as it is 2-3x faster to compile wesnoth.
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== Dependencies ==
Set your choice permanently with
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* Any changes to Wesnoth's build and run-time dependencies must be discussed on the developers mailing list first.
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* Update the CMake and SCons recipes accordingly.
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* Changes must be mentioned in the RELEASE_NOTES file, so they can be included in the forum announcement for the next release, and in the emails to packagers.
  
scons cxxtool=clang++
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== Bugs management ==
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* Change Status field of fixed bugs to "Fixed" after pushing upstream
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* Change Open/Closed field of fixed bugs to "Closed" after a release including the relevant commits has been published. See [[ReportingBugs#Bug_protocol]] for details.
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* Check regularly if there are new bugs relevant to your code and, if any, assign them to you.
  
 
== See also ==
 
== See also ==
* [[Project#Developers]]
 
 
* [[WesnothRepository]]
 
* [[WesnothRepository]]
 
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* [[PatchSubmissionGuidelines]]
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* [[SoftwareTesting]]
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* [[Project]]
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* [[CompatibilityStandards#Deprecation_levels_-_When_to_remove_deprecated_features|DeprecationLevels]]
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* [[ReferenceWML]]
 
[[Category:Development]]
 
[[Category:Development]]

Latest revision as of 02:43, 16 December 2023

This page describes guidelines developers with push access to the Wesnoth repository should follow. Most items apply to prospective contributors as well, in addition to the patch submission guidelines.

General

Are you a newcomer to Git or GitHub, or to the Battle for Wesnoth project?
If so, please see WesnothRepository.
  • Set up developer access to the repository, if applicable.
  • Participate in the #development channel on Discord as well as #wesnoth-dev IRC channel on irc.libera.chat to coordinate with other developers. Bots report commits and regression testing status, and other developers may ask you questions or provide feedback.

Commits

  • Any given branch should compile without warnings and run after every commit -- we use Github Actions, which will report any build failures on master and maintenance branches (1.12, 1.14, etc.) to the #development Discord channel.
  • All unit tests should pass after commit -- the CI will also test this. To run the C++ unit tests on your own machine, compile the "boost_unit_tests" executable and run it. To run the WML unit tests, run run_wml_tests -u in the checkout root.
  • Do not disable or ignore unit tests without a very good reason!
  • A few small commits are better than a single large commit (which is hard to review), so when possible split it in working parts with info about where you are going
  • Always review your changes, both before committing locally and before pushing upstream (see WesnothRepository#Reviewing your changes).
  • Never use the "force" option when pushing to the upstream Wesnoth repositories (see WesnothRepository#Force-pushing_policy).

Changelog and release notes

We provide a changelog at the root of the Wesnoth distribution and Git checkouts. It contains all changes, except for those that are only relevant to mainline developers and which are not expected to impact players or creators in any way.

It is your responsibility to update the changelog as you see fit for every commit. To avoid any chance of merge conflicts due to the changelog, it is recommended to add a file to the changelog_entries folder at the root of the repository rather than updating the changelog directly.

Commit messages

A good commit should not only contain good changes, but also include a helpful description of them for other developers, people tracking regressions, project maintainers, and even yourself in the future. There are many style guides on the Web describing best practices for documenting your Git commits.

For Wesnoth in particular, the general consensus is that contributors should adhere to the following rules:

  • Every commit message should begin with a self-contained summary/subject line no more than 72 characters long. This is the first (and often the only) line someone using browsing tools will see. Like with email subjects, this line should not have a trailing stop.
  • If your message needs more than a leading summary line, separate it from the rest with a blank line.
  • Subsequent lines should also be no more than 72 characters long. Use blank lines to separate paragraphs and list items.
  • When working on a mainline campaign/scenario, start the commit message with its acronym. For example HttT: when working on HttT in general and HttT S03: if the commit only applies to the third scenario of HttT (see below).
  • Likewise, if you work on the code of a specific component, you may want to use it as a prefix. That is e.g., gui2: or wesnothd: .
  • If you are performing branch merges, Git may include a list of conflicted paths in the commit message template. Edit this out; it ceases to be interesting after the conflicts have been resolved.
  • If you need to mention commit SHA1 hashes (e.g. in revert messages), make sure to use hashes from the upstream repository that are unlikely to change due to a future local or remote merge or rebase operation.

There are a few additional points to keep in mind for the wording of the contents:

  • Include "bug #1234" somewhere in your commit message if it addresses a bug or feature request from the Wesnoth bug tracker.
  • Use the project's standard abbreviations for campaigns and gameplay concepts, like HttT for Heir to the Throne, ZoC for "Zone of Control", etc. If referring to a particular campaign or scenario in your commit subject, you should use this convention: "HttT S01: Made Galdrad less suicidal"

Dependencies

  • Any changes to Wesnoth's build and run-time dependencies must be discussed on the developers mailing list first.
  • Update the CMake and SCons recipes accordingly.
  • Changes must be mentioned in the RELEASE_NOTES file, so they can be included in the forum announcement for the next release, and in the emails to packagers.

Bugs management

  • Change Status field of fixed bugs to "Fixed" after pushing upstream
  • Change Open/Closed field of fixed bugs to "Closed" after a release including the relevant commits has been published. See ReportingBugs#Bug_protocol for details.
  • Check regularly if there are new bugs relevant to your code and, if any, assign them to you.

See also

This page was last edited on 16 December 2023, at 02:43.