Refined go:embed handling for Go projects (#152)

* Fixed warning created by go:embed files.
* go:embed test with a project resource were added.
* User get notification in case go list command had errors.
* Removed code warnings in files.

src/main/java/com/jfrog/ide/common/go/GoScanWorkspaceCreator.java

@@ -1,5 +1,6 @@
 package com.jfrog.ide.common.go;
 
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.exception.ExceptionUtils;
 import org.jfrog.build.api.util.Log;
 import org.jfrog.build.extractor.go.GoDriver;
@@ -26,6 +27,7 @@ public class GoScanWorkspaceCreator implements FileVisitor<Path> {
     private final Path sourceDir;
     private final Path targetDir;
     private final Log logger;
+    private static final String[] EXCLUDED_DIRS = new String[]{".git", ".idea", ".vscode"};
 
     public GoScanWorkspaceCreator(String executablePath, Path sourceDir, Path targetDir, Path goModAbsDir, Map<String, String> env, Log logger) {
         this.goDriver = new GoDriver(executablePath, env, goModAbsDir.toFile(), logger);
@@ -36,6 +38,10 @@ public GoScanWorkspaceCreator(String executablePath, Path sourceDir, Path target
 
     @Override
     public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
+        // Skip excluded directories.
+        if (StringUtils.equalsAny(dir.getFileName().toString(), EXCLUDED_DIRS)) {
+            return FileVisitResult.SKIP_SUBTREE;
+        }
         // Skip subdirectories with go.mod files.
         // These directories are different Go projects and their go files should not be in the root project.
         if (!sourceDir.equals(dir)) {
@@ -68,8 +74,13 @@ public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IO
             Path targetGoMod = targetDir.resolve(sourceDir.relativize(file));
             Files.copy(file, targetGoMod);
             goDriver.runCmd("run . -goModPath=" + targetGoMod.toAbsolutePath() + " -wd=" + sourceDir.toAbsolutePath(), true);
+            return FileVisitResult.CONTINUE;
         }
         // Files other than go.mod and *.go files are not necessary to build the dependency tree of used Go packages.
+        // Therefore, we just create an empty file with the same name so go:embed files won't cause a missing file error.
+        if (!fileName.equals("go.sum")) {
+            Files.createFile(targetDir.resolve(sourceDir.relativize(file)));
+        }
         return FileVisitResult.CONTINUE;
     }
 

src/main/java/com/jfrog/ide/common/go/GoTreeBuilder.java

@@ -68,7 +68,7 @@ public DepTree createDependencyTree(GoDriver goDriver, Log logger, boolean verbo
         } catch (IOException e) {
             // Errors occurred during running "go list". Run again and this time ignore errors.
             usedModulesResults = goDriver.getUsedModules(false, true, dontBuildVcs);
-            logger.warn("Errors occurred during building the Go dependency tree. The dependency tree may be incomplete:" +
+            logger.error("Errors occurred during building the Go dependency tree. The dependency tree may be incomplete:" +
                     System.lineSeparator() + ExceptionUtils.getRootCauseMessage(e));
         }
         if (usedModulesResults.getRes().isEmpty()) {

src/test/java/com/jfrog/ide/common/go/GoTreeBuilderTest.java

@@ -127,17 +127,21 @@ public void testCreateDependencyTree5() {
      */
     @Test
     public void testCreateDependencyTree6() {
-        Map<String, Integer> expected = new HashMap<>();
-        try {
-            Path projectDir = GO_ROOT.resolve("project6");
-            GoTreeBuilder treeBuilder = new GoTreeBuilder(null, projectDir, projectDir.resolve("go.mod").toString(), null, log);
-            DepTree dt = treeBuilder.buildTree();
-            fail("Expected an IOException being thrown");
-        } catch (IOException e) {
-            // This exception is expected being thrown
-        } catch (Throwable e) {
-            fail(ExceptionUtils.getStackTrace(e));
-        }
+        Path projectDir = GO_ROOT.resolve("project6");
+        GoTreeBuilder treeBuilder = new GoTreeBuilder(null, projectDir, projectDir.resolve("go.mod").toString(), null, log);
+        assertThrows(IOException.class, treeBuilder::buildTree);
+    }
+
+    @Test
+    public void testCreateDependencyTreeEmbedProject() throws IOException {
+        Map<String, Integer> expected = new HashMap<>() {{
+            put("github.com/jfrog/jfrog-cli-core:1.9.0", 10);
+            put("github.com/jfrog/jfrog-client-go:0.26.1", 8);
+        }};
+        Path projectDir = GO_ROOT.resolve("embedProject");
+        GoTreeBuilder treeBuilder = new GoTreeBuilder(null, projectDir, projectDir.resolve("go.mod").toString(), null, log);
+        DepTree depTree = treeBuilder.buildTree();
+        validateDependencyTreeResults(expected, depTree);
     }
 
     private void validateDependencyTreeResults(Map<String, Integer> expected, DepTree actual) throws IOException {

src/test/resources/go/embedProject/go.mod

@@ -0,0 +1,8 @@
+module embedProject
+
+go 1.16
+
+require (
+	github.com/jfrog/jfrog-cli-core v1.9.0
+	github.com/jfrog/jfrog-client-go v0.26.1 // indirect
+)