Initial commit

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

rules/dco/dco.go

@@ -0,0 +1,47 @@
+package dco
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/vbatts/git-validation/git"
+	"github.com/vbatts/git-validation/validate"
+)
+
+func init() {
+	validate.RegisterRule(DcoRule)
+}
+
+var (
+	ValidDCO = regexp.MustCompile(`^Signed-off-by: ([^<]+) <([^<>@]+@[^<>]+)>$`)
+	DcoRule  = validate.Rule{
+		Name:        "DCO",
+		Description: "makes sure the commits are signed",
+		Run:         ValidateDCO,
+	}
+)
+
+func ValidateDCO(c git.CommitEntry) (vr validate.Result) {
+	vr.CommitEntry = c
+	if len(strings.Split(c["parent"], " ")) > 1 {
+		vr.Pass = true
+		vr.Msg = "merge commits do not require DCO"
+		return vr
+	}
+
+	hasValid := false
+	for _, line := range strings.Split(c["body"], "\n") {
+		if ValidDCO.MatchString(line) {
+			hasValid = true
+		}
+	}
+	if !hasValid {
+		vr.Pass = false
+		vr.Msg = "does not have a valid DCO"
+	} else {
+		vr.Pass = true
+		vr.Msg = "has a valid DCO"
+	}
+
+	return vr
+}