linux-kernel - [PATCH] editorconfig: Add automatic editor configuration file

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Date:   Thu,  2 Jul 2020 17:12:12 -0700
From:   Danny Lin <danny@...ag0n.dev>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andy Whitcroft <apw@...onical.com>, Joe Perches <joe@...ches.com>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, Danny Lin <danny@...ag0n.dev>
Subject: [PATCH] editorconfig: Add automatic editor configuration file

EditorConfig is a standard for defining basic editor configuration in
projects. There is support available for 47 code editors as of writing,
including both built-in and extension support. Many notable projects
have adopted the standard already, including zsh, htop, and qemu.

While this isn't a full-fledged C code style specifier, it does set some
basic ground rules that make it more convenient for contributors to use
any editor of their choice and not have to worry about indentation, line
endings, encoding, final newlines, etc. This should make it
significantly easier to conform to the kernel's general code style when
used in combination with clang-format.

For more information, check the official EditorConfig website:
https://editorconfig.org/

Signed-off-by: Danny Lin <danny@...ag0n.dev>
---
 .editorconfig                      | 16 ++++++++++++++++
 .gitignore                         |  1 +
 Documentation/process/4.Coding.rst |  6 ++++++
 3 files changed, 23 insertions(+)
 create mode 100644 .editorconfig

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 000000000000..580d2e90d855
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+# Linux kernel EditorConfig file (https://editorconfig.org/)
+
+# Located at the project root
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+
+indent_style = tab
+indent_size = 8
+
+# This avoids introducing too many unnecessary changes in trivial commits
+trim_trailing_whitespace = false
diff --git a/.gitignore b/.gitignore
index 87b9dd8a163b..956bcc3c9d76 100644
--- a/.gitignore
+++ b/.gitignore
@@ -89,6 +89,7 @@ modules.order
 #
 !.clang-format
 !.cocciconfig
+!.editorconfig
 !.get_maintainer.ignore
 !.gitattributes
 !.gitignore
diff --git a/Documentation/process/4.Coding.rst b/Documentation/process/4.Coding.rst
index 13dd893c9f88..c5c46bcafdad 100644
--- a/Documentation/process/4.Coding.rst
+++ b/Documentation/process/4.Coding.rst
@@ -66,6 +66,12 @@ for aligning variables/macros, for reflowing text and other similar tasks.
 See the file :ref:`Documentation/process/clang-format.rst <clangformat>`
 for more details.
 
+Some basic editor settings, such as indentation and line endings, will be
+set automatically if you are using an editor that is compatible with
+EditorConfig. See the official EditorConfig website for more information: 
+
+https://editorconfig.org/
+
 
 Abstraction layers
 ******************
-- 
2.27.0