File: HACKING

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# HACKING                                                       -*- org -*-
#+TITLE: Hacking notes for GPGME++
#+STARTUP: showall

* How to contribute
** No more ChangeLog files

  Do not modify any of the ChangeLog files in GPGME++.  We put change
  information only in the GIT commit log, and generate a top-level
  ChangeLog file from logs at "make dist" time.  As such, there are
  strict requirements on the form of the commit log messages.


** Commit log requirements

  Your commit log should always start with a one-line summary, the
  second line should be blank, and the remaining lines are usually
  ChangeLog-style entries for all affected files.  However, it's fine
  -- even recommended -- to write a few lines of prose describing the
  change, when the summary and ChangeLog entries don't give enough of
  the big picture.  Omit the leading TABs that you're used to seeing
  in a "real" ChangeLog file, but keep the maximum line length at 72
  or smaller, so that the generated ChangeLog lines, each with its
  leading TAB, will not exceed 80 columns.  If you want to add text
  which shall not be copied to the ChangeLog, separate it by a line
  consisting of two dashes at the begin of a line.

  Note that ./autogen.sh installs a git hook to do some basic syntax
  checking on the commit log message.

  Typo fixes and documentation updates don't need a ChangeLog entry;
  thus you would use a commit message like

  #+begin_example
  Fix typo in a comment

  --
  #+end_example

  The marker line here is important; without it the first line would
  appear in the ChangeLog.

  If you exceptionally need to have longer lines in a commit log you may
  do this after this scissor line:
  #+begin_example
  # ------------------------ >8 ------------------------
  #+end_example
  (hash, blank, 24 dashes, blank, scissor, blank, 24 dashes).
  Note that such a comment will be removed if the git commit option
  =--cleanup-scissor= is used.

** License policy

  GPGME++ is currently licensed under the LGPLv2.0+ with some tests
  being under the GPLv2(only).  We may eventually update to a newer
  version of the licenses or a combination of them.  It is thus
  important, that all contributed code allows for an update of the
  license; for example we can't accept code under the LGPLv2(only).

  If you want to contribute code or documentation to GPGME++ you are
  asked to assert that the contribution is in accordance to the "GPGME++
  Developer's Certificate of Origin" as found in the file "DCO".
  Except for a slight wording change, this DCO is identical to the one
  used by the Linux kernel.  Please take these simple steps:

  - Decide which mail address you want to use.  Please have your real
    name in the address and not a pseudonym.  Anonymous contributions
    can only be done if you find a proxy who certifies for you.

  - If your employer or school might claim ownership of code written
    by you; you need to talk to them to make sure that you have the
    right to contribute under the DCO.

  - Send an OpenPGP signed mail to the gnupg-devel@gnupg.org public
    mailing list from your mail address.  Include a copy of the DCO as
    found in the official master branch.  Insert your name and email
    address into the DCO in the same way you want to use it later.
    Example:

      Signed-off-by: Joe R. Hacker <joe@example.org>

    If you need it, you may perform simple transformations on the mail
    address: Replacing "@" by " at " or "." by " dot ".)

  - That's it.  From now on you only need to add a "Signed-off-by:"
    line with your name and mail address to the GIT commit message.
    It is recommended to send the patches using a PGP/MIME signed
    mail.

** Coding standards

  Please follow the KDE Coding styles. See:
  https://community.kde.org/Policies/Frameworks_Coding_Style
  If you are in doubt consult the existing code as an example.  Do no
  re-indent code without a need.  If you really need to do it, use a
  separate commit for such a change.

** Commit log keywords

  - GnuPG-bug-id :: Values are comma or space delimited bug numbers
                    from bug.gnupg.org pertaining to this commit.
  - Debian-bug-id :: Same as above but from the Debian bug tracker.
  - CVE-id :: CVE id number pertaining to this commit.
  - Regression-due-to :: Commit id of the regression fixed by this commit.
  - Fixes-commit :: Commit id this commit fixes.
  - Reported-by :: Value is a name or mail address of a bug reporter.
  - Suggested-by :: Value is a name or mail address of someone how
                    suggested this change.
  - Co-authored-by :: Name or mail address of a co-author
  - Some-comments-by :: Name or mail address of the author of
                        additional comments (commit log or code).
  - Proofread-by :: Sometimes used by translation commits.
  - Signed-off-by :: Name or mail address of the developer

* Debug hints

  - The environment variable GPGMEPP_INTERACTOR_DEBUG enables debugging
    of the EditInteractor classes. Allowed values are `stdout`, `stderr`,
    or a file path.
  - The environment variable GPGME_DEBUG enables debugging of gpgme;
    see gpgme's debug.[ch] for details.