Code Owners syntax and error handling (PREMIUM ALL)

This page describes the syntax and error handling used in Code Owners files, and provides an example file.

Code Owners syntax

Comments

Lines beginning with # are ignored:

# This is a comment

Sections

Sections are groups of entries. A section begins with a section heading in square brackets, followed by the entries.

[Section name]
/path/of/protected/file.rb @username
/path/of/protected/dir/ @group

Section headings

Section headings must always have a name. They can also be made optional, or require a number of approvals. A list of default owners can be added to the section heading line.

# Required section
[Section name]

# Optional section
^[Section name]

# Section requiring 5 approvals
[Section name][5]

# Section with @username as default owner
[Section name] @username

# Section with @group and @subgroup as default owners and requiring 2 approvals
[Section name][2] @group @subgroup

Section names

Sections names are defined between square brackets. Section names are not case-sensitive. Sections with duplicate names are combined.

[Section name]

Required sections

Required sections do not include ^ before the section name.

[Required section]

Optional sections

Optional sections include a ^ before the section name.

^[Optional section]

Sections requiring multiple approvals

Sections requiring multiple approvals include the number of approvals in square brackets after the section name.

[Section requiring 5 approvals][5]

NOTE: Optional sections ignore the number of approvals required.

Sections with default owners

You can define a default owner for the entries in a section by appending the owners to the section heading.

# Section with @username as default owner
[Section name] @username

# Section with @group and @subgroup as default owners and requiring 2 approvals
[Section name][2] @group @subgroup

Code Owner entries

Each Code Owner entry includes a path followed by one or more owners.

README.md @username1

NOTE: If an entry is duplicated in a section, the last entry is used from each section.

Relative paths

If a path does not start with a /, the path is treated as if it starts with a globstar. README.md is treated the same way as /**/README.md:

# This will match /README.md, /internal/README.md, /app/lib/README.md
README.md @username

# This will match /internal/README.md, /docs/internal/README.md, /docs/api/internal/README.md
internal/README.md

Absolute paths

If a path starts with a / it matches the root of the repository.

# Matches only the file named `README.md` in the root of the repository.
/README.md

# Matches only the file named `README.md` inside the `/docs` directory.
/docs/README.md

Directory paths

If a path ends with /, the path matches any file in the directory.

# This is the same as `/docs/**/*`
/docs/

Wildcard paths

Wildcards can be used to match one of more characters of a path.

# Any markdown files in the docs directory
/docs/*.md @username

# /docs/index file of any filetype
# For example: /docs/index.md, /docs/index.html, /docs/index.xml
/docs/index.* @username

# Any file in the docs directory with 'spec' in the name.
# For example: /docs/qa_specs.rb, /docs/spec_helpers.rb, /docs/runtime.spec
/docs/*spec* @username

# README.md files one level deep within the docs directory
# For example: /docs/api/README.md
/docs/*/README.md @username

Globstar paths

Globstars (**) can be used to match zero or more directories and subdirectories.

# This will match /docs/index.md, /docs/api/index.md, /docs/api/graphql/index.md
/docs/**/index.md

Entry owners

Entries must be followed by one or more owner. These can be groups, subgroups, and users. Order of owners is not important.

/path/to/entry.rb @group
/path/to/entry.rb @group/subgroup
/path/to/entry.rb @user
/path/to/entry.rb @group @group/subgroup @user

Groups as entry owners

Groups and subgroups can be owners of an entry. Each entry can be owned by one or more owners. For more details see the Add a group as a Code Owner.

/path/to/entry.rb @group
/path/to/entry.rb @group/subgroup
/path/to/entry.rb @group @group/subgroup

Users as entry owners

Users can be owners of an entry. Each entry can be owned by one or more owners.

/path/to/entry.rb @username1
/path/to/entry.rb @username1 @username2

Error handling in Code Owners

Error validation introduced in GitLab 16.3.

Entries with spaces

Paths containing whitespace must be escaped with backslashes: path\ with\ spaces/*.md. Without the backslashes, the path after the first whitespace is parsed as an owner. GitLab the parses folder with spaces/*.md @group into path: "folder", owners: " with spaces/*.md @group".

Unparsable sections

If a section heading cannot be parsed, the section is:

Parsed as an entry.
Added to the previous section.
If no previous section exists, the section is added to the default section.

For example, this file is missing a square closing bracket:

* @group

[Section name
docs/ @docs_group

GitLab recognizes the heading [Section name as an entry. The default section includes 3 rules:

Default section
- * owned by @group
- [Section owned by name
- docs/ owned by @docs_group

This file contains an unescaped space between the words Section and name. GitLab recognizes the intended heading as an entry:

[Docs]
docs/**/* @group

[Section name]{2} @group
docs/ @docs_group

The [Docs] section then includes 3 rules:

docs/**/* owned by @group
[Section owned by name]{2} @group
docs/ owned by @docs_group

Malformed owners

Each entry must contain 1 or more owners to be valid, malformed owners are ignored. For example /path/* @group user_without_at_symbol @user_with_at_symbol is owned by @group and @user_with_at_symbol.

Inaccessible or incorrect owners

Inaccessible or incorrect owners are ignored. For example, if @group, @username, and example@gitlab.com are accessible on the project and we create an entry:

* @group @grou @username @i_left @i_dont_exist example@gitlab.com invalid@gitlab.com

GitLab ignores @grou, @i_left, @i_dont_exist, and invalid@gitlab.com.

For more information on who is accessible, see Add a group as a Code Owner.

Zero owners

If an entry includes no owners, or zero accessible owners exist, the entry is invalid. Because this rule can never be satisfied, GitLab auto-approves it in merge requests.

NOTE: When a protected branch has Require code owner approval enabled, rules with zero owners are still honored.

Less than 1 required approval

When defining the number of approvals for a section, the minimum number of approvals is 1. Setting the number of approvals to 0 results in GitLab requiring one approval.

Example `CODEOWNERS` file

# This is an example of a CODEOWNERS file.
# Lines that start with `#` are ignored.

# app/ @commented-rule

# Specify a default Code Owner by using a wildcard:
* @default-codeowner

# Specify multiple Code Owners by using a tab or space:
* @multiple @code @owners

# Rules defined later in the file take precedence over the rules
# defined before.
# For example, for all files with a filename ending in `.rb`:
*.rb @ruby-owner

# Files with a `#` can still be accessed by escaping the pound sign:
\#file_with_pound.rb @owner-file-with-pound

# Specify multiple Code Owners separated by spaces or tabs.
# In the following case the CODEOWNERS file from the root of the repo
# has 3 Code Owners (@multiple @code @owners):
CODEOWNERS @multiple @code @owners

# You can use both usernames or email addresses to match
# users. Everything else is ignored. For example, this code
# specifies the `@legal` and a user with email `janedoe@gitlab.com` as the
# owner for the LICENSE file:
LICENSE @legal this_does_not_match janedoe@gitlab.com

# Use group names to match groups, and nested groups to specify
# them as owners for a file:
README @group @group/with-nested/subgroup

# End a path in a `/` to specify the Code Owners for every file
# nested in that directory, on any level:
/docs/ @all-docs

# End a path in `/*` to specify Code Owners for every file in
# a directory, but not nested deeper. This code matches
# `docs/index.md` but not `docs/projects/index.md`:
/docs/* @root-docs

# Include `/**` to specify Code Owners for all subdirectories
# in a directory. This rule matches `docs/projects/index.md` or
# `docs/development/index.md`
/docs/**/*.md @root-docs

# This code makes matches a `lib` directory nested anywhere in the repository:
lib/ @lib-owner

# This code match only a `config` directory in the root of the repository:
/config/ @config-owner

# If the path contains spaces, escape them like this:
path\ with\ spaces/ @space-owner

# Code Owners section:
[Documentation]
ee/docs    @docs
docs       @docs

# Use of default owners for a section. In this case, all files (*) are owned by
the dev team except the README.md and data-models which are owned by other teams.
[Development] @dev-team
*
README.md @docs-team
data-models/ @data-science-team

# This section is combined with the previously defined [Documentation] section:
[DOCUMENTATION]
README.md  @docs

Code Owners syntax and error handling (PREMIUM ALL)