message_regexp: regular expression rule for messages

Fixes: #30

now you can add a regular expression to the rules to be run
i.e. `git-validation -run "dco,message_regexp='^JIRA-[0-9]+ [A-Z].*$'"`

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

validate/rules.go

@@ -9,7 +9,7 @@ import (
 )
 
 var (
-	// RegisteredRules are the standard validation to perform on git commits
+	// RegisteredRules are the avaible validation to perform on git commits
 	RegisteredRules  = []Rule{}
 	registerRuleLock = sync.Mutex{}
 )
@@ -26,14 +26,15 @@ type Rule struct {
 	Name        string // short name for reference in in the `-run=...` flag
 	Value       string // value to configure for the rule (i.e. a regexp to check for in the commit message)
 	Description string // longer Description for readability
-	Run         func(git.CommitEntry) Result
+	Run         func(Rule, git.CommitEntry) Result
+	Default     bool // whether the registered rule is run by default
 }
 
 // Commit processes the given rules on the provided commit, and returns the result set.
 func Commit(c git.CommitEntry, rules []Rule) Results {
 	results := Results{}
 	for _, r := range rules {
-		results = append(results, r.Run(c))
+		results = append(results, r.Run(r, c))
 	}
 	return results
 }

validate/rules_test.go

@@ -46,7 +46,7 @@ func TestSliceHelpers(t *testing.T) {
 	for i := range set {
 		got := StringsSliceEqual(set[i].A, set[i].B)
 		if got != set[i].Equal {
-			t.Errorf("expected %d A and B comparison to be %q, but got %q", i, set[i].Equal, got)
+			t.Errorf("expected %d A and B comparison to be %t, but got %t", i, set[i].Equal, got)
 		}
 	}
 }