feat: allow revert commits

Previously Revert commits would fail the pipeline as they were not considered conventional commit friendly.
This caused issues in multiple projects as commitsar checks would just be ignored.

Closes #434

internal/commitpipeline/run.go

@@ -59,7 +59,7 @@ func (pipeline *Pipeline) Run() (*dispatcher.PipelineSuccess, error) {
 
 		log.Debugf("Commit found: [hash] %v [message] %v", parsedCommit.Hash.String(), parsedCommit.Heading)
 
-		if !text.IsMergeCommit(commitObject.Message) && !text.IsInitialCommit(commitObject.Message) {
+		if !text.IsMergeCommit(commitObject.Message) && !text.IsInitialCommit(commitObject.Message) && !text.IsRevertCommit(commitObject.Message) {
 			filteredCommits = append(filteredCommits, commitHash)
 		}
 	}

pkg/text/is_revert_commit.go

@@ -0,0 +1,11 @@
+package text
+
+import "strings"
+
+func IsRevertCommit(commitMessage string) bool {
+	if strings.HasPrefix(commitMessage, "Revert") {
+		return true
+	}
+
+	return strings.HasPrefix(commitMessage, "revert")
+}

pkg/text/is_revert_commit_test.go

@@ -0,0 +1,22 @@
+package text
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsRevertCommit(t *testing.T) {
+	tests := map[string]bool{
+		"Revert some commit":      true,
+		"revert \"some commit\"":  true,
+		"chore: something\n":      false,
+		"fix: test":               false,
+		"fix: Kodiak style regex": false,
+	}
+
+	for test, expected := range tests {
+		err := IsRevertCommit(test)
+		assert.Equal(t, expected, err)
+	}
+}