Add contributing guidelines

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

1 files changed, 96 insertions, 0 deletions

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..4b4f296
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,96 @@
+# Contributing to libical
+
+So you want to contribute to libical! Thank you, that's awesome!
+
+All contributors agree to the
+[developer certificate of origin](#developer-certificate-of-origin)
+by contributing to libical.
+
+Feel free to contact [us via our mailinglist](http://imag-pim.org/mailinglist/)
+and/or submit patches via mail (use `git format-patch` and
+`git send-email`, always add a cover letter to describe your submission).
+You don't have to send patches via mail, though. As long as I can `git pull`
+your changes (without having to login or register at the remote) or `git am`
+your patchset, I'm fine.
+I'd encourage you, though, to [use git-send-email](https://git-send-email.io)
+or at least [git-request-pull](https://git-scm.org/).
+
+Make sure to test-compile your patchset and run tests if there are any for the
+code you changed.
+
+I will run your patchset through travis CI.
+
+
+## Prerequisites
+
+You'll need libical installed on your system to test-compile this library.
+If you have a `nix` installation, you can issue
+`nix-shell --run "cargo check --tests"`
+to check the library.
+
+
+## Commit guidelines
+
+Make sure your patchset does not contain "Fixup" commits when publishing it, but feel
+free to send  "Fixup" commits in the review process. If squashing fails I will
+come back to you.
+
+Also ensure that each commit has
+[a "Signed-off-by: " line](https://stackoverflow.com/questions/1962094/what-is-the-sign-off-feature-in-git-for).
+By adding that line, you agree to our
+[developer certificate of origin](#developer-certificate-of-origin).
+If you do not add the "Signed-off-by: " line, I reserve the right to kindly
+reject your patch.
+
+
+## Code of Conduct
+
+We use the same
+[code of conduct as the rust community does](https://www.rust-lang.org/conduct.html).
+
+Basically: Be kind, encourage others to ask questions - you are encouraged to
+ask questions as well!
+
+
+## Developer Certificate of Origin
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```
+
+