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# Overview
The table below shows an overview of all gitlint's built-in rules, with more specific details further down the page.
Gitlint also has [community **contrib**uted rules](contrib_rules.md) which are not listed here as they're disabled by default.
In addition, you can also [write your own user-defined rule](user_defined_rules.md) in case you don't find
what you're looking for.
ID | Name | gitlint version | Description
------|-----------------------------|-------------------|-------------------------------------------
T1 | title-max-length | >= 0.1.0 | Title length must be < 72 chars.
T2 | title-trailing-whitespace | >= 0.1.0 | Title cannot have trailing whitespace (space or tab)
T3 | title-trailing-punctuation | >= 0.1.0 | Title cannot have trailing punctuation (?:!.,;)
T4 | title-hard-tab | >= 0.1.0 | Title cannot contain hard tab characters (\t)
T5 | title-must-not-contain-word | >= 0.1.0 | Title cannot contain certain words (default: "WIP")
T6 | title-leading-whitespace | >= 0.4.0 | Title cannot have leading whitespace (space or tab)
T7 | title-match-regex | >= 0.5.0 | Title must match a given regex (default: None)
T8 | title-max-length | >= 0.14.0 | Title length must be > 5 chars.
B1 | body-max-line-length | >= 0.1.0 | Lines in the body must be < 80 chars
B2 | body-trailing-whitespace | >= 0.1.0 | Body cannot have trailing whitespace (space or tab)
B3 | body-hard-tab | >= 0.1.0 | Body cannot contain hard tab characters (\t)
B4 | body-first-line-empty | >= 0.1.0 | First line of the body (second line of commit message) must be empty
B5 | body-min-length | >= 0.4.0 | Body length must be at least 20 characters
B6 | body-is-missing | >= 0.4.0 | Body message must be specified
B7 | body-changed-file-mention | >= 0.4.0 | Body must contain references to certain files if those files are changed in the last commit
B8 | body-match-regex | >= 0.14.0 | Title must match a given regex (default: None)
M1 | author-valid-email | >= 0.9.0 | Author email address must be a valid email address
I1 | ignore-by-title | >= 0.10.0 | Ignore a commit based on matching its title
I2 | ignore-by-body | >= 0.10.0 | Ignore a commit based on matching its body
I3 | ignore-body-lines | >= 0.14.0 | Ignore certain lines in a commit body that match a regex
## T1: title-max-length
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T1 | title-max-length | >= 0.1 | Title length must be < 72 chars.
### Options
Name | gitlint version | Default | Description
---------------|-----------------|---------|----------------------------------
line-length | >= 0.2 | 72 | Maximum allowed title length
### Examples
#### .gitlint
```ini
# Titles should be max 72 chars
[title-max-length]
line-length=72
# It's the 21st century, titles can be 120 chars long
[title-max-length]
line-length=120
```
## T2: title-trailing-whitespace
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T2 | title-trailing-whitespace | >= 0.1 | Title cannot have trailing whitespace (space or tab)
## T3: title-trailing-punctuation
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T3 | title-trailing-punctuation | >= 0.1 | Title cannot have trailing punctuation (?:!.,;)
## T4: title-hard-tab
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T4 | title-hard-tab | >= 0.1 | Title cannot contain hard tab characters (\t)
## T5: title-must-not-contain-word
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T5 | title-must-not-contain-word | >= 0.1 | Title cannot contain certain words (default: "WIP")
### Options
Name | gitlint version | Default | Description
---------------|-----------------|---------|----------------------------------
words | >= 0.3 | WIP | Comma-separated list of words that should not be used in the title. Matching is case insensitive
### Examples
#### .gitlint
```ini
# Ensure the title doesn't contain swear words
[title-must-not-contain-word]
words=crap,darn,damn
```
## T6: title-leading-whitespace
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T6 | title-leading-whitespace | >= 0.4 | Title cannot have leading whitespace (space or tab)
## T7: title-match-regex
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T7 | title-match-regex | >= 0.5 | Title must match a given regex (default: .*)
### Options
Name | gitlint version | Default | Description
---------------|-----------------|---------|----------------------------------
regex | >= 0.5 | .* | [Python regex](https://docs.python.org/library/re.html) that the title should match.
### Examples
#### .gitlint
```ini
# Ensure every title starts with a user-story like US123
[title-match-regex]
regex=^US[1-9][0-9]*
```
## T8: title-min-length ##
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
T1 | title-min-length | >= | Title length must be > 5 chars.
### Options
Name | gitlint version | Default | Description
---------------|-----------------|---------|----------------------------------
min-length | >= 0.14.0 | 5 | Minimum required title length
### Examples
#### .gitlint
```ini
# Titles should be min 3 chars
[title-min-length]
min-length=3
```
## B1: body-max-line-length
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B1 | body-max-line-length | >= 0.1 | Lines in the body must be < 80 chars
### Options
Name | gitlint version | Default | Description
---------------|-----------------|---------|----------------------------------
line-length | >= 0.2 | 80 | Maximum allowed line length in the commit message body
### Examples
#### .gitlint
```ini
# It's the 21st century, lines can be 120 chars long
[body-max-line-length]
line-length=120
# Your tool prefers 72
[body-max-line-length]
line-length=72
```
## B2: body-trailing-whitespace
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B2 | body-trailing-whitespace | >= 0.1 | Body cannot have trailing whitespace (space or tab)
## B3: body-hard-tab
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B3 | body-hard-tab | >= 0.1 | Body cannot contain hard tab characters (\t)
## B4: body-first-line-empty
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B4 | body-first-line-empty | >= 0.1 | First line of the body (second line of commit message) must be empty
## B5: body-min-length
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B5 | body-min-length | >= 0.4 | Body length must be at least 20 characters. In versions >= 0.8.0, gitlint will not count newline characters.
### Options ###
Name | gitlint version | Default | Description
---------------|-----------------|---------|----------------------------------
min-length | >= 0.4 | 20 | Minimum number of required characters in body
### Examples
#### .gitlint
```ini
# You want *something* in every commit body, but doesn't have to be as long as 20 chars.
[body-min-length]
min-length=5
# You want a more elaborate message in every commit body
[body-min-length]
min-length=100
```
## B6: body-is-missing
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B6 | body-is-missing | >= 0.4 | Body message must be specified
### Options
Name | gitlint version | Default | Description
----------------------|-----------------|-----------|----------------------------------
ignore-merge-commits | >= 0.4 | true | Whether this rule should be ignored during merge commits. Allowed values: true,false.
## B7: body-changed-file-mention
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B7 | body-changed-file-mention | >= 0.4 | Body must contain references to certain files if those files are changed in the last commit
### Options
Name | gitlint version | Default | Description
----------------------|-----------------|--------------|----------------------------------
files | >= 0.4 | (empty) | Comma-separated list of files that need to an explicit mention in the commit message in case they are changed.
### Examples
#### .gitlint
```ini
# Prevent that certain sensitive files are committed by mistake by forcing
# users to mention them explicitly if they're deliberately changing them
[body-changed-file-mention]
files=generated.xml,secrets.txt,private-key.pem
```
## B8: body-match-regex
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
B8 | body-match-regex | >= 0.14 | Body must match a given regex
### Options
Name | gitlint version | Default | Description
----------------------|-----------------|--------------|----------------------------------
regex | >= 0.14 | None | [Python regex](https://docs.python.org/library/re.html) that the title should match.
### Examples
#### .gitlint
```ini
# Ensure the body ends with Reviewed-By: <some value>
[body-match-regex]
regex=Reviewed-By:(.*)$
# Ensure body contains the word "Foo" somewhere
[body-match-regex]
regex=(*.)Foo(.*)
```
## M1: author-valid-email
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
M1 | author-valid-email | >= 0.8.3 | Author email address must be a valid email address
!!! note
Email addresses are [notoriously hard to validate and the official email valid spec is often too loose for any real world application](http://stackoverflow.com/a/201378/381010).
Gitlint by default takes a pragmatic approach and requires users to enter email addresses that contain a name, domain and tld and has no spaces.
### Options
Name | gitlint version | Default | Description
----------------------|-------------------|------------------------------|----------------------------------
regex | >= 0.9.0 | `[^@ ]+@[^@ ]+\.[^@ ]+` | [Python regex](https://docs.python.org/library/re.html) the commit author email address is matched against
### Examples
#### .gitlint
```ini
# Only allow email addresses from a foo.com domain
[author-valid-email]
regex=[^@]+@foo.com
```
## I1: ignore-by-title
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
I1 | ignore-by-title | >= 0.10.0 | Ignore a commit based on matching its title.
### Options
Name | gitlint version | Default | Description
----------------------|-------------------|------------------------------|----------------------------------
regex | >= 0.10.0 | None | [Python regex](https://docs.python.org/library/re.html) to match against commit title. On match, the commit will be ignored.
ignore | >= 0.10.0 | all | Comma-separated list of rule names or ids to ignore when this rule is matched.
### Examples
#### .gitlint
```ini
# Match commit titles starting with Release
# For those commits, ignore title-max-length and body-min-length rules
[ignore-by-title]
regex=^Release(.*)
ignore=title-max-length,body-min-length
# ignore all rules by setting ignore to 'all'
# ignore=all
```
## I2: ignore-by-body
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
I2 | ignore-by-body | >= 0.10.0 | Ignore a commit based on matching its body.
### Options
Name | gitlint version | Default | Description
----------------------|-------------------|------------------------------|----------------------------------
regex | >= 0.10.0 | None | [Python regex](https://docs.python.org/library/re.html) to match against each line of the body. On match, the commit will be ignored.
ignore | >= 0.10.0 | all | Comma-separated list of rule names or ids to ignore when this rule is matched.
### Examples
#### .gitlint
```ini
# Ignore all commits with a commit message body with a line that contains 'release'
[ignore-by-body]
regex=(.*)release(.*)
ignore=all
# For matching commits, only ignore rules T1, body-min-length, B6.
# You can use both names as well as ids to refer to other rules.
[ignore-by-body]
regex=(.*)release(.*)
ignore=T1,body-min-length,B6
```
## I3: ignore-body-lines
ID | Name | gitlint version | Description
------|-----------------------------|-----------------|-------------------------------------------
I3 | ignore-body-lines | >= 0.14.0 | Ignore certain lines in a commit body that match a regex.
### Options
Name | gitlint version | Default | Description
----------------------|-------------------|------------------------------|----------------------------------
regex | >= 0.14.0 | None | [Python regex](https://docs.python.org/library/re.html) to match against each line of the body. On match, that line will be ignored by gitlint (the rest of the body will still be linted).
### Examples
#### .gitlint
```ini
# Ignore all lines that start with 'Co-Authored-By'
[ignore-body-lines]
regex=^Co-Authored-By
# Ignore lines that start with 'Co-Authored-By' or with 'Signed-Off-By'
[ignore-body-lines]
regex=(^Co-Authored-By)|(^Signed-Off-By)
# Ignore lines that contain 'foobar'
[ignore-body-lines]
regex=(.*)foobar(.*)
```
|
