Gradle pre-commit Git Hooks

A Gradle plugin enforcing pre-commit and commit-msg Git hooks configuration. Conventional-commits-ready.

Hooks are created upfront, before the execution of any task. This implies that even when importing the project into a gradle-aware IDE, the hooks are generated automatically.

Usage

This plugin must be applied to settings.gradle.kts.

plugins {
    id("org.danilopianini.gradle-pre-commit-git-hooks") version "<version>"
}

gitHooks {
    // Configuration
    createHooks() // actual hooks creation
}

The Groovy syntax is not officially supported. However, since Groovy can call Kotlin, it is still possible (though pretty cumbersome) to use the plugin from a Groovy settings.gradle file:

plugins {
    id('org.danilopianini.gradle-pre-commit-git-hooks') version '<version>'
}

gitHooks { extension ->
    extension.with {
        commitMsg { context ->
            context.with {
                conventionalCommits { conventionalCommits ->
                    conventionalCommits.with {
                        defaultTypes()
                    }
                }
            }
        }
        createHooks(true)
    }
}

Contexts

The plugin has special support for commit-msg and pre-commit hooks, which are the ones most frequently used. Conventional commits are enforced at the commit-msg level. Custom hooks can still be specified.

gitHooks {
    preCommit {
        // Configuration for pre-commit
    }
    hook("pre-merge-commit") {
        // Configuration for pre-merge-commit
    }
    hook("foo") {
        // Configuration for foo
    }
    commitMsg {
        // Configuration, with conventional commits support
    } 
    createHooks()
}

Configuration options available to every hook

Every script can be initialized by writing its code in form of String or by downloading it from a URL. Resource loading from classpath returns URLs and can thus be used transparently. These cases require the method from.

The script can be enriched with more code by calling appendScript.

Finally, the script can be required to run gradle tasks, either requiring their success or not, through tasks

gitHooks {
    repoRoot = file("some/folder") // custom git repository location, defaults to the local project and scans the parents 
    preCommit {
        // Script from a source, can be a String, URL or File 
        from("https://my.repo/pre-commit.sh")
        // Content can be added at the bottom of the script
        appendScript {
            """
            echo additional lines
            """
        }
    }
    hook("pre-merge-commit") {
        from { // Creates a fresh script with a bash shebang line
            """
            echo some bash code
            """
        }
        // Content can be added at the bottom of the script
        appendScript {
            """
            echo additional lines
            """
        }
    }
    hook("foo") {
        from("#!/usr/bin/env ruby") { // Custom shebang line
            """
            puts "Hello, world"
            """
        }
        tasks("baz", "gra") // also runs tasks baz and gra, requiring their success
    }
    hook("baz") {
        tasks("zin", "pla", requireSuccess = false) // runs tasks zin and pla, ignoring failure
        tasks("wab") // then, runs task wab, requiring success
    }
    createHooks()
}

Conventional commits

Conventional commits receive special treatment, they can get configured succinctly inside the commitMsg block.

The Default configuration supports the following commit types: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test.

gitHooks {
    commitMsg { conventionalCommits() } // Applies the default conventional commits configuration
    createHooks()
}

The base configuration supports only fix and feat

gitHooks {
    commitMsg {
        conventionalCommits { } // Only feat and fix
    }
    createHooks()
}

The following shows a custom configuration, adding custom types foo, bar, and baz to fix and feat

gitHooks {
    commitMsg {
        conventionalCommits {
            types("foo", "bar") 
            types("baz")
        }
    }
    createHooks()
}

The following custom configuration instead extends the default configuration, adding custom types foo and bar.

gitHooks {
    commitMsg {
        conventionalCommits {
            defaultTypes()
            types("foo", "bar") 
        }
    }
    createHooks()
}

If you want to be able to always overwrite your hook changes pass true to the createHooks() method

gitHooks {
    preCommit {
        from { // Creates a fresh script with a bash shebang line
            """
            echo some bash code you have changed
            """
        }
    }
    createHooks(true)
}