shell - allowing to fallback on maven deps installation if no md.rest…

…x.json is found in current module

restx-core-shell/src/main/java/restx/core/shell/DepsShellCommand.java

@@ -11,6 +11,7 @@
 import org.apache.ivy.Ivy;
 import org.apache.ivy.core.report.ResolveReport;
 import org.apache.ivy.core.retrieve.RetrieveOptions;
+import restx.AppSettings;
 import restx.build.*;
 import restx.build.ModuleDescriptor;
 import restx.factory.Component;
@@ -19,10 +20,12 @@
 
 import java.io.*;
 import java.net.URL;
+import java.nio.file.FileVisitResult;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 import static java.util.Arrays.asList;
@@ -82,6 +85,9 @@ public void run(RestxShell shell) throws Exception {
             if(ModuleDescriptorType.RESTX.equals(moduleDescriptorTypeWithExistingFile)) {
                 shell.println("installing deps using restx module descriptor...");
                 installDepsFromModuleDescriptor(shell, ModuleDescriptorType.RESTX.resolveDescriptorFile(shell.currentLocation()));
+            } else if(ModuleDescriptorType.MAVEN.equals(moduleDescriptorTypeWithExistingFile)) {
+                shell.println("installing deps using maven descriptor...");
+                installDepsFromMavenDescriptor(shell, ModuleDescriptorType.MAVEN.resolveDescriptorFile(shell.currentLocation()));
             } else {
                 throw new IllegalArgumentException("Unsupported deps install for module type "+moduleDescriptorTypeWithExistingFile);
             }
@@ -115,6 +121,43 @@ private void installDepsFromModuleDescriptor(RestxShell shell, File mdFile) thro
             }
         }
 
+        private void installDepsFromMavenDescriptor(RestxShell shell, File pomFile) throws Exception {
+            AppSettings appSettings = shell.getFactory().getComponent(AppSettings.class);
+
+            Path dependenciesDir = Paths.get(appSettings.targetDependency());
+
+            // Emptying target dependencies directory first
+            if(dependenciesDir.toFile().exists()) {
+                java.nio.file.Files.walkFileTree(dependenciesDir, new SimpleFileVisitor<Path>() {
+                    @Override
+                    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+                        java.nio.file.Files.delete(file);
+                        return FileVisitResult.CONTINUE;
+                    }
+                    @Override
+                    public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+                        java.nio.file.Files.delete(dir);
+                        return FileVisitResult.CONTINUE;
+                    }
+                });
+            }
+
+            dependenciesDir.toFile().mkdirs();
+
+            // Then copying dependencies through copy-dependencies plugin
+            ProcessBuilder mavenCmd = new ProcessBuilder(
+                    "mvn", "org.apache.maven.plugins:maven-dependency-plugin:3.0.1:copy-dependencies",
+                    "-DoutputDirectory=" + dependenciesDir.toAbsolutePath(), "-DincludeScope=runtime"
+            );
+
+            shell.println("Executing `"+mavenCmd+"` ...");
+            mavenCmd.redirectErrorStream(true)
+             .redirectOutput(ProcessBuilder.Redirect.INHERIT)
+             .directory(shell.currentLocation().toFile().getAbsoluteFile())
+             .start()
+             .waitFor();
+        }
+
         private static void storeModuleDescriptorMD5File(RestxShell shell, ModuleDescriptorType mdType) throws IOException {
             File mdFile = mdType.resolveDescriptorFile(shell.currentLocation());
             File md5File = ModuleDescriptorType.MAVEN.resolveDescriptorMd5File(shell.currentLocation());

restx-core-shell/src/main/java/restx/core/shell/ModuleDescriptorType.java

@@ -31,7 +31,7 @@ public File resolveDescriptorMd5File(Path inDirectory) {
 
     public static Optional<ModuleDescriptorType> firstModuleDescriptorTypeWithExistingFile(final Path inDirectory) {
         return FluentIterable
-            .from(Arrays.asList(ModuleDescriptorType.RESTX))
+            .from(Arrays.asList(ModuleDescriptorType.RESTX, ModuleDescriptorType.MAVEN))
             .filter(new Predicate<ModuleDescriptorType>() {
                 @Override
                 public boolean apply(ModuleDescriptorType mdType) {

restx-core-shell/src/main/resources/restx/core/shell/deps.man

@@ -1,11 +1,13 @@
 ## deps install
 
-Resolve the dependencies declared in the file `md.restx.json`, and synchronize them in `target/dependency` directory.
+Resolve dependencies declared in current module descriptor (in order: either `md.restx.json` or `pom.xml`),
+and synchronize them in `target/dependency` directory.
 
-This command uses Apache Ivy under the hood to perform dependency resolution, using settings provided by restx.
+For `md.restx.json` `module.ivy`, this command uses Apache Ivy under the hood to perform dependency resolution,
+using settings provided by restx. You can override these Ivy settings by placing a file named ivysettings.xml in your
+restx shell install location (usually `~/.restx`).
 
-You can override these Ivy settings by placing a file named ivysettings.xml in your restx shell install location
-(usually `~/.restx`).
+For `pom.xml`, this command will use maven-dependency-plugin:copy-dependencies goal to perform dependency resolution.
 
 Note: You need to be placed in a restx app root directory to run this command.