Allow file scheme in RemoteArchive to simplify testing

While it might look a bit controversial, the file scheme can also point to a remote (for instance a mounted network share) file. By allowing the `file://` scheme we can use `RemoteArchive` for those files.

As a useful side effect, this makes testing RemoteArchive handling a lot easier.

rewrite-core/src/main/java/org/openrewrite/remote/RemoteArchive.java

@@ -34,6 +34,7 @@
 import java.nio.charset.Charset;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.List;
 import java.util.UUID;
 import java.util.regex.Pattern;
@@ -92,6 +93,9 @@ public InputStream getInputStream(ExecutionContext ctx) {
         try {
             Path localArchive = cache.compute(uri, () -> {
                 //noinspection resource
+                if ("file".equals(uri.getScheme())) {
+                    return Files.newInputStream(Paths.get(uri));
+                }
                 HttpSender.Response response = httpSender.send(httpSender.get(uri.toString()).build());
                 if (response.isSuccessful()) {
                     return response.getBody();

rewrite-core/src/test/java/org/openrewrite/remote/RemoteArchiveTest.java

@@ -21,10 +21,12 @@
 import org.openrewrite.ExecutionContext;
 import org.openrewrite.HttpSenderExecutionContextView;
 import org.openrewrite.InMemoryExecutionContext;
+import org.openrewrite.PrintOutputCapture;
 import org.openrewrite.test.MockHttpSender;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.file.Paths;
 import java.util.concurrent.*;
@@ -40,10 +42,6 @@ class RemoteArchiveTest {
     void gradleWrapper(String version) throws Exception {
         URL distributionUrl = requireNonNull(RemoteArchiveTest.class.getClassLoader().getResource("gradle-" + version + "-bin.zip"));
         ExecutionContext ctx = new InMemoryExecutionContext();
-        RemoteExecutionContextView.view(ctx).setArtifactCache(new LocalRemoteArtifactCache(
-          Paths.get(System.getProperty("user.home") + "/.rewrite/remote/gradleWrapper")));
-        HttpSenderExecutionContextView.view(ctx)
-          .setLargeFileHttpSender(new MockHttpSender(distributionUrl::openStream));
 
         RemoteArchive remoteArchive = Remote
           .builder(
@@ -58,10 +56,9 @@ void gradleWrapper(String version) throws Exception {
 
     @Test
     void gradleWrapperDownloadFails() throws Exception {
-        URL distributionUrl = requireNonNull(RemoteArchiveTest.class.getClassLoader().getResource("gradle-7.4.2-bin.zip"));
+        URL distributionUrl = new URL("http://example.com");
         ExecutionContext ctx = new InMemoryExecutionContext();
-        RemoteExecutionContextView.view(ctx).setArtifactCache(new LocalRemoteArtifactCache(
-          Paths.get(System.getProperty("user.home") + "/.rewrite/remote/gradleWrapperDownloadFails")));
+
         HttpSenderExecutionContextView.view(ctx)
           .setLargeFileHttpSender(new MockHttpSender(408));
 
@@ -116,6 +113,21 @@ void gradleWrapperConcurrent(String version) throws Exception {
         executorService.shutdown();
     }
 
+    @Test
+    void printingRemoteArchive() throws URISyntaxException {
+        URL zipUrl = requireNonNull(RemoteArchiveTest.class.getClassLoader().getResource("zipfile.zip"));
+
+        RemoteArchive remoteArchive = Remote
+          .builder(
+            Paths.get("content.txt"),
+            zipUrl.toURI()
+          )
+          .build("content.txt");
+
+        String printed = remoteArchive.printAll(new PrintOutputCapture<>(0, PrintOutputCapture.MarkerPrinter.DEFAULT));
+        assertThat(printed).isEqualTo("this is a zipped file");
+    }
+
     private Long getInputStreamSize(InputStream is) {
         BlackHoleOutputStream out = new BlackHoleOutputStream();
         try {