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CONTRIBUTING.md

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Contributing to librsync {#page_contributing}

Instructions and conventions for people wanting to work on librsync. Please consider these guidelines even if you're doing your own fork.

Code Style

The prefered style for code is equivalent to using GNU indent with the following arguments;

$ indent -linux -nut -i4 -ppi2 -l80 -lc80 -fc1 -fca -sob

The preferred style for non-docbook comments are as follows;

                         /*=
                          | A short poem that
                          | shall never ever be
                          | reformated or reindented
                          */

    /* Single line comment indented to match code indenting. */

    /* Blank line delimited paragraph multi-line comments.

       Without leading stars, or blank line comment delimiters. */

    int a;                      /* code line comments */

The preferred style for docbook comments is javadoc with autobrief as follows;

/** /file file.c
  * Brief summary paragraph.
  *
  * With blank line paragraph delimiters and leading stars.
  *
  * /param foo parameter descriptions...
  *
  * /param bar ...in separate blank-line delimited paragraphs.
  *
  * Example:/code
  *  code blocks that will never be reformated.
  * /endcode
  *
  * Without blank-line comment delimiters. */

    int a;                      /**< brief attribute description */
    int b;                      /**< multiline attribute description
                                 *
                                 * With blank line delimited paragraphs.*/

There is a make tidy target that will use GNU indent to reformat all code and non-docbook comments, doing some pre/post processing with sed to handle some corner cases indent doesn't handle well.

There is also a make tidyc target that will reformat all code and comments with https://github.com/dbaarda/tidyc. This will also correctly reformat all docbook comments, equivalent to running tidyc with the following arguments;

$ tidyc -R -C -l80

Pull requests

Fixes or improvements in pull requests are welcome. Please:

  • Send small PRs that address one issues each.

  • Update NEWS.md to say what you changed.

  • Add a test as a self-contained C file in tests/ that passes or fails, and is hooked into CMakeLists.txt.

  • Keep the code style consistent with what's already there, especially in keeping symbols with an rs_ prefix.

NEWS

NEWS.md contains a list of user-visible changes in the library between releases version. This includes changes to the way it's packaged, bug fixes, portability notes, changes to the API, and so on.

Add and update items under a "Changes in X.Y.Z" heading at the top of the file. Do this as you go along, so that we don't need to work out what happened when it's time for a release.

Tests

Please try to update docs and tests in parallel with code changes.

Releasing

If you are making a new tarball release of librsync, follow this checklist:

  • NEWS.md - make sure the top "Changes in X.Y.Z" is correct, and the date is correct. Make sure the changes since the last release are documented.

  • CMakeLists.txt - version is correct.

  • librsync.spec - make sure version and URL are right.

  • Run make all doc check in a clean checkout of the release tag. Also check the travis-cl check status of the last commit on github.

  • Draft a new release on github, typing in the release details including an overview, included changes, and known issues. The overview should give an indication of the magnitude of the changes and their impact, and the relative urgency to upgrade. The included changes should come from the NEWS.md for the release. It's probably easiest to copy and edit the previous release.

  • After creating the release, download the tar.gz version, edit the release, and re-upload it. This ensures that the release includes a stable tarball (See librsync#146 for details).

Test results for builds of public github branches are at https://travis-ci.org/librsync/librsync.