vendor test tools in submodule

Instead of using the main module we should vendor the test tools in a
different directory. That way we do not add extra dependencies to the
main module which can be problemetic for packages or other users.

This is already done in buildah so this makes us more consitent.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

test/tools/vendor/github.com/vbatts/git-validation/main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	_ "github.com/vbatts/git-validation/rules/danglingwhitespace"
+	_ "github.com/vbatts/git-validation/rules/dco"
+	_ "github.com/vbatts/git-validation/rules/messageregexp"
+	_ "github.com/vbatts/git-validation/rules/shortsubject"
+	"github.com/vbatts/git-validation/validate"
+)
+
+var (
+	flCommitRange  = flag.String("range", "", "use this commit range instead (implies -no-travis)")
+	flListRules    = flag.Bool("list-rules", false, "list the rules registered")
+	flRun          = flag.String("run", "", "comma delimited list of rules to run. Defaults to all.")
+	flVerbose      = flag.Bool("v", false, "verbose")
+	flDebug        = flag.Bool("D", false, "debug output")
+	flQuiet        = flag.Bool("q", false, "less output")
+	flDir          = flag.String("d", ".", "git directory to validate from")
+	flNoTravis     = flag.Bool("no-travis", false, "disables travis environment checks (when env TRAVIS=true is set)")
+	flTravisPROnly = flag.Bool("travis-pr-only", true, "when on travis, only run validations if the CI-Build is checking pull-request build")
+)
+
+func main() {
+	flag.Parse()
+
+	if *flDebug {
+		os.Setenv("DEBUG", "1")
+	}
+	if *flQuiet {
+		os.Setenv("QUIET", "1")
+	}
+
+	if *flListRules {
+		for _, r := range validate.RegisteredRules {
+			fmt.Printf("%q -- %s\n", r.Name, r.Description)
+		}
+		return
+	}
+
+	if *flTravisPROnly && strings.ToLower(os.Getenv("TRAVIS_PULL_REQUEST")) == "false" {
+		fmt.Printf("only to check travis PR builds and this not a PR build. yielding.\n")
+		return
+	}
+
+	// rules to be used
+	var rules []validate.Rule
+	for _, r := range validate.RegisteredRules {
+		// only those that are Default
+		if r.Default {
+			rules = append(rules, r)
+		}
+	}
+	// or reduce the set being run to what the user provided
+	if *flRun != "" {
+		rules = validate.FilterRules(validate.RegisteredRules, validate.SanitizeFilters(*flRun))
+	}
+	if os.Getenv("DEBUG") != "" {
+		log.Printf("%#v", rules) // XXX maybe reduce this list
+	}
+
+	var commitRange = *flCommitRange
+	if commitRange == "" {
+		if strings.ToLower(os.Getenv("TRAVIS")) == "true" && !*flNoTravis {
+			if os.Getenv("TRAVIS_COMMIT_RANGE") != "" {
+				commitRange = strings.Replace(os.Getenv("TRAVIS_COMMIT_RANGE"), "...", "..", 1)
+			} else if os.Getenv("TRAVIS_COMMIT") != "" {
+				commitRange = os.Getenv("TRAVIS_COMMIT")
+			}
+		}
+	}
+
+	runner, err := validate.NewRunner(*flDir, rules, commitRange, *flVerbose)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if err := runner.Run(); err != nil {
+		log.Fatal(err)
+	}
+	_, fail := runner.Results.PassFail()
+	if fail > 0 {
+		fmt.Printf("%d commits to fix\n", fail)
+		os.Exit(1)
+	}
+
+}