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+from gitlint.rules import ConfigurationRule
+from gitlint.options import IntOption
+
+
+"""
+Full details on user-defined rules: https://jorisroovers.com/gitlint/user_defined_rules
+
+The ReleaseConfigurationRule class below is an example of a user-defined ConfigurationRule. Configuration rules are
+gitlint rules that are applied once per commit and BEFORE any other rules are run. Configuration Rules are meant to
+dynamically change gitlint's configuration and/or the commit that is about to be linted. A typically use-case for this
+is modifying the behavior of gitlint's rules based on a commit contents.
+
+Notes:
+- Modifying the commit object DOES NOT modify the actual git commit message in the target repo, only gitlint's copy of
+ it.
+- Modifying the config object only has effect on the commit that is being linted, subsequent commits will not
+ automatically inherit this configuration.
+"""
+
+
+class ReleaseConfigurationRule(ConfigurationRule):
+ """
+ This rule will modify gitlint's behavior for Release Commits.
+
+ This example might not be the most realistic for a real-world scenario,
+ but is meant to give an overview of what's possible.
+ """
+
+ # A rule MUST have a human friendly name
+ name = "release-configuration-rule"
+
+ # A rule MUST have a *unique* id, we recommend starting with UCR
+ # (for User-defined Configuration-Rule), but this can really be anything.
+ id = "UCR1"
+
+ # A rule MAY have an option_spec if its behavior should be configurable.
+ options_spec = [IntOption("custom-verbosity", 2, "Gitlint verbosity for release commits")]
+
+ def apply(self, config, commit):
+ self.log.debug("ReleaseConfigurationRule: This will be visible when running `gitlint --debug`")
+
+ # If the commit title starts with 'Release', we want to modify
+ # how all subsequent rules interpret that commit
+ if commit.message.title.startswith("Release"):
+ # If your Release commit messages are auto-generated, the
+ # body might contain trailing whitespace. Let's ignore that
+ config.ignore.append("body-trailing-whitespace")
+
+ # Similarly, the body lines might exceed 80 chars,
+ # let's set gitlint's limit to 200
+ # To set rule options use:
+ # config.set_rule_option(<rule-name>, <rule-option>, <value>)
+ config.set_rule_option("body-max-line-length", "line-length", 200)
+
+ # For kicks, let's set gitlint's verbosity to 2
+ # To set general options use
+ # config.set_general_option(<general-option>, <value>)
+ config.set_general_option("verbosity", 2)
+ # Wwe can also use custom options to make this configurable
+ config.set_general_option("verbosity", self.options["custom-verbosity"].value)
+
+ # Strip any lines starting with $ from the commit message
+ # (this only affects how gitlint sees your commit message, it does
+ # NOT modify your actual commit in git)
+ commit.message.body = [line for line in commit.message.body if not line.startswith("$")]
+
+ # You can add any extra properties you want to the commit object, these will be available later on
+ # in all rules.
+ commit.my_property = "This is my property"