resolve parameters in template files with image knowledge

imagetool/src/main/java/com/oracle/weblogic/imagetool/cli/menu/CommonOptions.java

@@ -10,6 +10,7 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -25,6 +26,7 @@
 import com.oracle.weblogic.imagetool.util.DockerBuildCommand;
 import com.oracle.weblogic.imagetool.util.DockerfileOptions;
 import com.oracle.weblogic.imagetool.util.Utils;
+import com.oracle.weblogic.imagetool.util.VerrazzanoModel;
 import picocli.CommandLine.Option;
 import picocli.CommandLine.Unmatched;
 
@@ -36,6 +38,9 @@ public abstract class CommonOptions {
     private String tempDirectory = null;
     private String nonProxyHosts = null;
 
+    private List<Object> resolveOptions = null;
+    private List<Path> resolveFiles = null;
+
     abstract String getInstallerVersion();
 
     private void handleChown() {
@@ -167,6 +172,23 @@ void init(String buildId) throws Exception {
         logger.exiting();
     }
 
+    List<Path> gatherFiles() {
+        if (resolveFiles == null) {
+            resolveFiles = new ArrayList<>();
+        }
+        if (verrazzanoModel != null) {
+            resolveFiles.add(verrazzanoModel);
+        }
+        return resolveFiles;
+    }
+
+    List<Object> resolveOptions() {
+        if (resolveFiles != null && !resolveFiles.isEmpty()) {
+            resolveOptions = Collections.singletonList(new VerrazzanoModel(imageTag, dockerfileOptions.domain_home()));
+        }
+        return resolveOptions;
+    }
+
     /**
      * Returns true if any patches should be applied.
      * A PSU is considered a patch.
@@ -432,6 +454,12 @@ String getPassword() {
     )
     private boolean skipOpatchUpdate = false;
 
+    @Option(
+        names = {"--vzModel"},
+        description = "For verrazzano, resolve parameters in the verrazzano model with information from the image tool."
+    )
+    Path verrazzanoModel;
+
     @SuppressWarnings("unused")
     @Unmatched
     List<String> unmatchedOptions;

imagetool/src/main/java/com/oracle/weblogic/imagetool/cli/menu/CreateImage.java

@@ -95,6 +95,9 @@ public CommandResponse call() throws Exception {
             String dockerfile = Utils.writeDockerfile(tmpDir + File.separator + "Dockerfile",
                 "Create_Image.mustache", dockerfileOptions, dryRun);
 
+            // resolve parameters in the list of mustache templates returned by gatherFiles()
+            Utils.writeResolvedFiles(gatherFiles(), resolveOptions());
+
             runDockerCommand(dockerfile, cmdBuilder);
         } catch (Exception ex) {
             logger.fine("**ERROR**", ex);

imagetool/src/main/java/com/oracle/weblogic/imagetool/cli/menu/UpdateImage.java

@@ -152,6 +152,9 @@ public CommandResponse call() throws Exception {
             String dockerfile = Utils.writeDockerfile(tmpDir + File.separator + "Dockerfile",
                 "Update_Image.mustache", dockerfileOptions, dryRun);
 
+            // resolve parameters in the list of mustache templates returned by gatherFiles()
+            Utils.writeResolvedFiles(gatherFiles(), resolveOptions());
+
             runDockerCommand(dockerfile, cmdBuilder);
         } catch (Exception ex) {
             return new CommandResponse(-1, ex.getMessage());

imagetool/src/main/java/com/oracle/weblogic/imagetool/util/Utils.java

@@ -210,6 +210,38 @@ public static String writeDockerfile(String destPath, String template, Dockerfil
         }
     }
 
+    /**
+     * Resolve the parameters in the list of Mustache templates with values passed in command line
+     * arguments or other values described by the image tool.
+     * @param paths list of file paths that are mustache templates
+     * @param options list of option files to resolve the mustache parameters
+     * @throws IOException if a file in the fileNames is invalid
+     */
+    public static void writeResolvedFiles(List<Path> paths, List<Object> options)
+        throws IOException {
+        if (paths != null) {
+            for (Path path : paths) {
+                logger.fine("writeResolvedFiles: resolve parameters in file {0}", path);
+                File directory = path.toFile().getParentFile();
+                if (directory == null
+                    || !(Files.exists(path) && Files.isReadable(path) && Files.isWritable(path))) {
+                    throw new IllegalArgumentException(getMessage("IMG-0073", path));
+                }
+
+                MustacheFactory mf = new DefaultMustacheFactory(directory);
+                Mustache mustache;
+                try (FileReader fr = new FileReader(path.toFile())) {
+                    mustache = mf.compile(fr, path.getFileName().toString());
+                }
+
+                try (FileWriter fw = new FileWriter(path.toFile())) {
+                    mustache.execute(fw, options).flush();
+                }
+            }
+        }
+
+    }
+
     /**
      * Executes the given docker command and returns the stdout of the process as properties.
      *

imagetool/src/main/java/com/oracle/weblogic/imagetool/util/VerrazzanoModel.java

@@ -0,0 +1,45 @@
+// Copyright (c) 2020, Oracle Corporation and/or its affiliates.
+// Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
+
+package com.oracle.weblogic.imagetool.util;
+
+/**
+ * Mustache collection of options used to resolve values for the Verrazzano Model
+ * as provided with the --resolverFiles command line argument.
+ */
+public class VerrazzanoModel {
+
+    private String imageName;
+    private String domainHome;
+
+
+    /**
+     * Construct file with the options.
+     *
+     * @param imageName name from the image tag argument
+     * @param domainHome domain home argument or default if no argument
+     */
+    public VerrazzanoModel(String imageName, String domainHome) {
+        this.imageName = imageName;
+        this.domainHome = domainHome;
+    }
+
+    /**
+     * Return the image name value passed in the image tag argument.
+     *
+     * @return image tag name
+     */
+    public String imageName() {
+        return imageName;
+    }
+
+    /**
+     * Return the domain home passed in the domain home argument or the default if not passed as
+     * an argument.
+     *
+     * @return domain home value
+     */
+    public String domainHome() {
+        return domainHome;
+    }
+}

imagetool/src/main/resources/ImageTool.properties

@@ -71,3 +71,4 @@ IMG-0069=No recommended patches for {0}, version {1}
 IMG-0070=Failed to find latest patches for {0}, version {1}
 IMG-0071=WDT Operation is set to UPDATE, but the DOMAIN_HOME environment variable was not defined in the base image, {0}.  Did you mean to use "--wdtOperation CREATE" to create a new domain?
 IMG-0072=ORACLE_HOME environment variable is not defined in the base image: {0}
+IMG-0073=Invalid file {0} listed for Verrazzano model

imagetool/src/test/java/com/oracle/weblogic/imagetool/cli/menu/CommonOptionsTest.java

@@ -11,6 +11,7 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
@@ -20,11 +21,13 @@
 import com.oracle.weblogic.imagetool.logging.LoggingFacade;
 import com.oracle.weblogic.imagetool.logging.LoggingFactory;
 import com.oracle.weblogic.imagetool.util.DockerfileOptions;
+import com.oracle.weblogic.imagetool.util.Utils;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
 @Tag("unit")
@@ -125,4 +128,48 @@ void handleAdditionalBuildCommands(@TempDir File buildDir) throws Exception {
         }
     }
 
+    /**
+     * Test resolving options in a list of input files.
+     *
+     * @throws Exception if in error or IOException
+     */
+    @Test
+    void testResolveOptions() throws Exception {
+        CreateImage createImage = new CreateImage();
+
+        // accessing private fields normally set by the command line
+        Field optionsField = CommonOptions.class.getDeclaredField("dockerfileOptions");
+        optionsField.setAccessible(true);
+        DockerfileOptions dockerfile = new DockerfileOptions("testbuildid");
+        optionsField.set(createImage, dockerfile);
+
+        Field imageTagField = CommonOptions.class.getDeclaredField("imageTag");
+        imageTagField.setAccessible(true);
+        imageTagField.set(createImage, "mydomain:latest");
+
+        Field resolveFilesField = CommonOptions.class.getDeclaredField("resolveFiles");
+        resolveFilesField.setAccessible(true);
+        List<Path> resolveFiles =
+            Arrays.asList(new File("target/test-classes/templates/resolver.yml").toPath(),
+            new File("target/test-classes/templates/verrazzano.yml").toPath());
+        resolveFilesField.set(createImage, resolveFiles);
+
+        Utils.writeResolvedFiles(resolveFiles, createImage.resolveOptions());
+
+        List<String> linesRead =
+            Files.readAllLines(new File("target/test-classes/templates/resolver.yml").toPath());
+        assertEquals(2, linesRead.size(), "Number of lines read from the file was unexpected");
+        for (String line : linesRead) {
+            line = line.trim();
+            if (line.startsWith("domainHome")) {
+                assertTrue(line.endsWith("/u01/domains/base_domain"), "Invalid domain home value " + line);
+            } else if (line.startsWith("image")) {
+                assertTrue(line.endsWith("mydomain:latest"),
+                    "Invalid tag name " + line);
+            } else {
+                fail("Unexpected line read " + line);
+            }
+
+        }
+    }
 }

imagetool/src/test/resources/templates/resolver.yml

@@ -0,0 +1,2 @@
+domainHome: {{{domainHome}}}
+image: {{{imageName}}}

imagetool/src/test/resources/templates/verrazzano.yml

@@ -0,0 +1,42 @@
+apiVersion: verrazzano.io/v1beta1
+kind: VerrazzanoModel
+metadata:
+  name: dereks-todo-model
+  namespace: default
+spec:
+  description: "Derek's Todo System"
+  weblogicDomains:
+    - name: todo
+      adminPort: 32701
+      t3Port: 32702
+      domainCRValues:
+        domainUID: todo
+        domainHome: {{{domainHome}}}
+        image: {{{imageName}}}
+        includeServerOutInPodLog: true
+        replicas: 1
+        webLogicCredentialsSecret:
+          name: todo-weblogic-credentials
+        imagePullSecrets:
+          - name: ocir
+        clusters:
+          - clusterName: cluster-1
+        serverPod:
+          env:
+            - name: JAVA_OPTIONS
+              value: "-Dweblogic.StdoutDebugEnabled=false"
+            - name: USER_MEM_ARGS
+              value: "-Djava.security.egd=file:/dev/./urandom -Xms64m -Xmx256m "
+            - name: WL_HOME
+              value: /u01/oracle/wlserver
+            - name: MW_HOME
+              value: /u01/oracle
+      connections:
+        - ingress:
+            - name: todo-ingress
+              match:
+                - uri:
+                    prefix: "/todo"
+        - database:
+            - target: todo-db
+              datasourceName: todoDb