Merge branch 'develop' into rav/url_preview_limit_title

1 files changed, 19 insertions, 0 deletions

diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst

index a71a4a696b..df81f6e54f 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -58,10 +58,29 @@ All Matrix projects have a well-defined code-style - and sometimes we've even
 got as far as documenting it... For instance, synapse's code style doc lives
 at https://github.com/matrix-org/synapse/tree/master/docs/code_style.md.
 
+To facilitate meeting these criteria you can run ``scripts-dev/lint.sh``
+locally. Since this runs the tools listed in the above document, you'll need
+python 3.6 and to install each tool. **Note that the script does not just
+test/check, but also reformats code, so you may wish to ensure any new code is
+committed first**. By default this script checks all files and can take some
+time; if you alter only certain files, you might wish to specify paths as
+arguments to reduce the run-time.
+
 Please ensure your changes match the cosmetic style of the existing project,
 and **never** mix cosmetic and functional changes in the same commit, as it
 makes it horribly hard to review otherwise.
 
+Before doing a commit, ensure the changes you've made don't produce
+linting errors. You can do this by running the linters as follows. Ensure to
+commit any files that were corrected.
+
+::
+    # Install the dependencies
+    pip install -U black flake8 isort
+    
+    # Run the linter script
+    ./scripts-dev/lint.sh
+
 Changelog
 ~~~~~~~~~