From 51ab8ade38bcb0e86aafbc4ba06331e24ca35ea0 Mon Sep 17 00:00:00 2001
From: Sergey Vartanov <me@enzet.ru>
Date: Sun, 15 May 2022 19:02:55 +0300
Subject: [PATCH] Add commit style to documentation.

---
 CONTRIBUTING.md      | 6 ++++++
 doc/contributing.moi | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index df50ee3..76b3ab7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -41,6 +41,12 @@ We use [Black](http://github.com/psf/black) code formatter with maximum 80 chara
 
 If you create new Python file, make sure you add `__author__ = "<first name> <second name>"` and `__email__ = "<author e-mail>"` string variables.
 
+### Commit message format ###
+
+The project uses commit messages that starts with a verb in infinitive form with first letter in uppercase, ends with a dot, and is not longer than 50 characters. E.g. `Add new icon.` or `Fix labels.`
+
+If some issues or pull requests are referenced, commit message should starts with prefix such as `PR #123: `, `Issue #42: `, or `Fix #13: ` with the next letter in lowercase. E.g. `PR #123: refactor elements.` or `Issue #42: add icon for natural=tree.`
+
 Suggest a tag to support
 ------------------------
 
diff --git a/doc/contributing.moi b/doc/contributing.moi
index 22dc59e..79b97f7 100644
--- a/doc/contributing.moi
+++ b/doc/contributing.moi
@@ -35,6 +35,12 @@ We use \ref {http://github.com/psf/black} {Black} code formatter with maximum 80
 
 If you create new Python file, make sure you add \m {__author__ = "\formal {first name} \formal {second name}"} and \m {__email__ = "\formal {author e-mail}"} string variables.
 
+\3 {Commit message format} {}
+
+The project uses commit messages that starts with a verb in infinitive form with first letter in uppercase, ends with a dot, and is not longer than 50 characters. E.g. \m {Add new icon.} or \m {Fix labels.}
+
+If some issues or pull requests are referenced, commit message should starts with prefix such as \m {PR #123: }, \m {Issue #42: }, or \m {Fix #13: } with the next letter in lowercase. E.g. \m {PR #123: refactor elements.} or \m {Issue #42: add icon for natural=tree.}
+
 \2 {Suggest a tag to support} {}
 
 Please, create an issue describing how you would like the feature to be visualized.