added --label option

app/src/main/java/io/seqera/wave/cli/App.java

@@ -31,10 +31,7 @@
 import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.time.OffsetDateTime;
-import java.util.Arrays;
-import java.util.Base64;
-import java.util.List;
-import java.util.Optional;
+import java.util.*;
 import java.util.stream.Collectors;
 
 import ch.qos.logback.classic.Level;
@@ -60,8 +57,8 @@
 import io.seqera.wave.util.Packer;
 import org.slf4j.LoggerFactory;
 import picocli.CommandLine;
-import static io.seqera.wave.cli.util.Checkers.isEmpty;
-import static io.seqera.wave.cli.util.Checkers.isEnvVar;
+
+import static io.seqera.wave.cli.util.Checkers.*;
 import static io.seqera.wave.util.DockerHelper.addPackagesToSpackFile;
 import static io.seqera.wave.util.DockerHelper.condaFileFromPackages;
 import static io.seqera.wave.util.DockerHelper.condaFileFromPath;
@@ -200,6 +197,9 @@ public class App implements Runnable {
     @Option(names = {"--include"}, paramLabel = "false", description = "Include one or more containers in the specified base image")
     List<String> includes;
 
+    @Option(names = {"--label"}, paramLabel = "false", description = "Include one or more labels in the wave build image. e.g. KEY=VALUE")
+    List<String> label;
+
     public static void main(String[] args) {
         try {
             final App app = new App();
@@ -382,13 +382,28 @@ protected void validateArgs() {
         if( !isEmpty(platform) && !VALID_PLATFORMS.contains(platform) )
             throw new IllegalCliArgumentException(String.format("Unsupported container platform: '%s'", platform));
 
+        // check labels
+        if( label!=null ) {
+            for( String it : label) {
+                if( !isLabel(it) ) throw new IllegalCliArgumentException("Invalid docker label syntax - offending value: " + it);
+            }
+        }
+
     }
 
     protected Client client() {
         return new Client().withEndpoint(waveEndpoint);
     }
 
     protected SubmitContainerTokenRequest createRequest() {
+        Map<String, String> labels = null;
+        if(label!=null){
+            labels = new HashMap<>();
+            for(String singleLabel: label){
+                String[]  singleLabelArray = singleLabel.split("=");
+                labels.put(singleLabelArray[0], singleLabelArray[1]);
+            }
+        }
         return new SubmitContainerTokenRequest()
                 .withContainerImage(image)
                 .withContainerFile(containerFileBase64())
@@ -407,6 +422,7 @@ protected SubmitContainerTokenRequest createRequest() {
                 .withFreezeMode(freeze)
                 .withDryRun(dryRun)
                 .withContainerIncludes(includes)
+                .withLabels(labels)
                 ;
     }
 

app/src/main/java/io/seqera/wave/cli/util/Checkers.java

@@ -26,6 +26,7 @@
 public class Checkers {
 
     private static final Pattern ENV_REGEX = Pattern.compile("^[A-Za-z_][A-Za-z0-9_]*=.*$");
+    private static final Pattern LABEL_REGEX = Pattern.compile("^[a-z][a-z0-9.-]*[a-z0-9]=.*$");
 
     static public boolean isEmpty(String value) {
         return value==null || "".equals(value.trim());
@@ -38,4 +39,8 @@ static public boolean isEmpty(List list) {
     static public boolean isEnvVar(String value) {
         return value!=null && ENV_REGEX.matcher(value).matches();
     }
+
+    static public boolean isLabel(String value) {
+        return value!=null && LABEL_REGEX.matcher(value).matches();
+    }
 }

app/src/test/groovy/io/seqera/wave/cli/AppTest.groovy

@@ -17,6 +17,8 @@
 
 package io.seqera.wave.cli
 
+import io.seqera.wave.api.ContainerConfig
+
 import java.nio.file.Files
 import java.time.Instant
 
@@ -269,4 +271,23 @@ class AppTest extends Specification {
         app.@towerToken == 'xyz'
     }
 
+    def "test valid labels"(){
+        given:
+        def app = new App()
+        String[] args = ["--label", "key1=value1","--label", "key2=value2"]
+
+        when:
+        new CommandLine(app).parseArgs(args)
+        then:
+        app.@label[0] == "key1=value1"
+        app.@label[1] == "key2=value2"
+
+        when:
+        def request = app.createRequest()
+        then:
+        request.labels == [
+                "key1":"value1",
+                "key2":"value2"
+        ]
+    }
 }