Use uniuri to generate temporary tag

cmd/drone-docker/main.go

@@ -1,22 +1,20 @@
 package main
 
 import (
-	"math/rand"
 	"os"
 	"runtime"
-	"time"
+	"strings"
 
+	"github.com/dchest/uniuri"
+	docker "github.com/drone-plugins/drone-docker"
+	"github.com/drone-plugins/drone-plugin-lib/drone"
 	"github.com/joho/godotenv"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
-
-	docker "github.com/drone-plugins/drone-docker"
-	"github.com/drone-plugins/drone-plugin-lib/drone"
 )
 
 var (
 	version = "unknown"
-	charset = []byte("abcdefghijklmnopqrstuvwxyz")
 )
 
 func main() {
@@ -388,17 +386,7 @@ func run(c *cli.Context) error {
 }
 
 func generateTempTag() string {
-	tagLength := 8
-	return randomString(tagLength)
-}
-
-func randomString(n int) string {
-	rand.Seed(time.Now().UTC().UnixNano())
-	b := make([]byte, n)
-	for i := range b {
-		b[i] = charset[rand.Intn(len(charset))]
-	}
-	return string(b)
+	return strings.ToLower(uniuri.New())
 }
 
 func GetExecCmd() string {

docker_test.go

@@ -1,12 +1,15 @@
 package docker
 
 import (
+	"github.com/dchest/uniuri"
 	"os/exec"
 	"reflect"
+	"strings"
 	"testing"
 )
 
 func TestCommandBuild(t *testing.T) {
+	tempTag := strings.ToLower(uniuri.New())
 	tcs := []struct {
 		name  string
 		build Build
@@ -16,7 +19,7 @@ func TestCommandBuild(t *testing.T) {
 			name: "secret from env var",
 			build: Build{
 				Name:       "plugins/drone-docker:latest",
-				TempTag:    "abcdefgh",
+				TempTag:    tempTag,
 				Dockerfile: "Dockerfile",
 				Context:    ".",
 				SecretEnvs: []string{
@@ -30,7 +33,7 @@ func TestCommandBuild(t *testing.T) {
 				"-f",
 				"Dockerfile",
 				"-t",
-				"abcdefgh",
+				tempTag,
 				".",
 				"--secret id=foo_secret,env=FOO_SECRET_ENV_VAR",
 			),
@@ -39,7 +42,7 @@ func TestCommandBuild(t *testing.T) {
 			name: "secret from file",
 			build: Build{
 				Name:       "plugins/drone-docker:latest",
-				TempTag:    "abcdefgh",
+				TempTag:    tempTag,
 				Dockerfile: "Dockerfile",
 				Context:    ".",
 				SecretFiles: []string{
@@ -53,7 +56,7 @@ func TestCommandBuild(t *testing.T) {
 				"-f",
 				"Dockerfile",
 				"-t",
-				"abcdefgh",
+				tempTag,
 				".",
 				"--secret id=foo_secret,src=/path/to/foo_secret",
 			),
@@ -62,7 +65,7 @@ func TestCommandBuild(t *testing.T) {
 			name: "multiple mixed secrets",
 			build: Build{
 				Name:       "plugins/drone-docker:latest",
-				TempTag:    "abcdefgh",
+				TempTag:    tempTag,
 				Dockerfile: "Dockerfile",
 				Context:    ".",
 				SecretEnvs: []string{
@@ -81,7 +84,7 @@ func TestCommandBuild(t *testing.T) {
 				"-f",
 				"Dockerfile",
 				"-t",
-				"abcdefgh",
+				tempTag,
 				".",
 				"--secret id=foo_secret,env=FOO_SECRET_ENV_VAR",
 				"--secret id=bar_secret,env=BAR_SECRET_ENV_VAR",
@@ -93,7 +96,7 @@ func TestCommandBuild(t *testing.T) {
 			name: "invalid mixed secrets",
 			build: Build{
 				Name:       "plugins/drone-docker:latest",
-				TempTag:    "abcdefgh",
+				TempTag:    tempTag,
 				Dockerfile: "Dockerfile",
 				Context:    ".",
 				SecretEnvs: []string{
@@ -114,7 +117,7 @@ func TestCommandBuild(t *testing.T) {
 				"-f",
 				"Dockerfile",
 				"-t",
-				"abcdefgh",
+				tempTag,
 				".",
 			),
 		},
@@ -122,7 +125,7 @@ func TestCommandBuild(t *testing.T) {
 			name: "platform argument",
 			build: Build{
 				Name:       "plugins/drone-docker:latest",
-				TempTag:    "abcdefgh",
+				TempTag:    tempTag,
 				Dockerfile: "Dockerfile",
 				Context:    ".",
 				Platform:   "test/platform",
@@ -134,7 +137,7 @@ func TestCommandBuild(t *testing.T) {
 				"-f",
 				"Dockerfile",
 				"-t",
-				"abcdefgh",
+				tempTag,
 				".",
 				"--platform",
 				"test/platform",
@@ -144,7 +147,7 @@ func TestCommandBuild(t *testing.T) {
 			name: "ssh agent",
 			build: Build{
 				Name:       "plugins/drone-docker:latest",
-				TempTag:    "abcdefgh",
+				TempTag:    tempTag,
 				Dockerfile: "Dockerfile",
 				Context:    ".",
 				SSHKeyPath: "id_rsa=/root/.ssh/id_rsa",
@@ -156,7 +159,7 @@ func TestCommandBuild(t *testing.T) {
 				"-f",
 				"Dockerfile",
 				"-t",
-				"abcdefgh",
+				tempTag,
 				".",
 				"--ssh id_rsa=/root/.ssh/id_rsa",
 			),

go.mod

@@ -13,6 +13,7 @@ require (
 
 require (
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/dchest/uniuri v1.2.0 // indirect
 	github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	golang.org/x/sys v0.0.0-20220731174439-a90be440212d // indirect

go.sum

@@ -11,6 +11,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46t
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dchest/uniuri v1.2.0 h1:koIcOUdrTIivZgSLhHQvKgqdWZq5d7KdMEWF1Ud6+5g=
+github.com/dchest/uniuri v1.2.0/go.mod h1:fSzm4SLHzNZvWLvWJew423PhAzkpNQYq+uNLq4kxhkY=
 github.com/drone-plugins/drone-plugin-lib v0.4.1 h1:47rZlmcMpr1hSp+6Gl+1Z4t+efi/gMQU3lxukC1Yg64=
 github.com/drone-plugins/drone-plugin-lib v0.4.1/go.mod h1:KwCu92jFjHV3xv2hu5Qg/8zBNvGwbhoJDQw/EwnTvoM=
 github.com/drone/drone-go v1.7.1 h1:ZX+3Rs8YHUSUQ5mkuMLmm1zr1ttiiE2YGNxF3AnyDKw=