Some features improvement

README.md

@@ -33,6 +33,8 @@ We run our own private registry on a server with limited storage and it was only
       username for docker login
 -password string
       password for docker login
+-promote
+      promote user to enter docker login password; If specified will ignore `-password`
 -insecure
       ignore https verification error
 -repos
@@ -78,30 +80,4 @@ $GOPATH/bin/deckschrubber -latest 3
 
 ```
 $GOPATH/bin/deckschrubber -tag_regexp ^.*-SNAPSHOT$ 
-```
-
-## Dockerize
-
-In order to have a minimum image footprint(~7+MB), the dockerize process had avoid to use the offical [golang image](https://hub.docker.com/_/golang/).
-But to compile golang app alone and build the image from a minimum image that only contains a standard CA certificate [centurylink/ca-certs](https://hub.docker.com/r/centurylink/ca-certs/).
-Please follow these steps to have a working image built and pushed:
-
-
-* **Compile golang app with the following command**
-
-```
-CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
-```
-
-* **Build and push the image with proper tag**
-
-```
-docker build -t your.registry.com:5000/someproject/deckschrubber:20171025-3-SNAPSHOT .
-docker push your.registry.com:5000/someproject/deckschrubber:20171025-3-SNAPSHOT 
-```
-
-* **Run deckschrubber as image**
-
-```
-docker run --rm --name registry-retention-runner  your.registry.com:5000/someproject/deckschrubber -registry http://your.registry.com:5000 -repos developer/myapp,developer/deckschrubber -username someone -password urpwd -insecure
-```
+```

main.go

@@ -47,6 +47,8 @@ var (
 	ver *bool
 	// If true, https connection will ignore verification error
 	insecure *bool
+	// If ture, promote user to enter registry password
+	enterPwd *bool
 )
 
 const (
@@ -63,6 +65,8 @@ func init() {
 	username = flag.String("username", "", "registry username to login")
 	// registry password (default = "")
 	password = flag.String("password", "", "registry password to login")
+	// Promote to enter password
+	enterPwd = flag.Bool("promote", false, "promote to enter password")
 	// Maximum age of iamges to consider for deletion in days (default = 0)
 	day = flag.Int("day", 0, "max age in days")
 	// Maximum age of months to consider for deletion in days (default = 0)
@@ -100,6 +104,12 @@ func main() {
 	if *debug {
 		log.SetLevel(log.DebugLevel)
 	}
+
+	if *enterPwd {
+		fmt.Println("Enter registry login password:")
+		fmt.Scanln(password)
+	}
+
 	// Empty context for all requests in sequel
 	ctx := context.Background()
 	transport := http.DefaultTransport