bazel: keep inferring classpath from broken workspaces

Author: georgewfraser

TODOS.md

@@ -20,6 +20,7 @@
 - Select entire name, find references => no results
 - Crashes if maven is not installed
 - Homebrew users don't have src.zip, detect java version and download the appropriate src.zip
+- Temporary files created for Bazel command output are not cleaned up.
 
 ## Optimizations
 - Compilation is very slow in the presence of lots of errors

src/main/java/org/javacs/InferConfig.java

@@ -337,7 +337,7 @@ private Path bazelOutputBase(Path bazelWorkspaceRoot) {
         String[] command = {
             "bazel", "info", "output_base",
         };
-        var output = fork(bazelWorkspaceRoot, command);
+        var output = fork(bazelWorkspaceRoot, command, false);
         if (output == NOT_FOUND) {
             return NOT_FOUND;
         }
@@ -354,20 +354,21 @@ private void bazelDryRunBuild(Path bazelWorkspaceRoot, Set<String> targets) {
         var command = new ArrayList<String>();
         command.add("bazel");
         command.add("build");
+        command.add("--keep_going");
         command.add("--nobuild");
         command.addAll(targets);
         String[] c = new String[command.size()];
         c = command.toArray(c);
-        var output = fork(bazelWorkspaceRoot, c);
+        var output = fork(bazelWorkspaceRoot, c, true);
         if (output == NOT_FOUND) {
             return;
         }
         return;
     }
 
     private Set<String> bazelQuery(Path bazelWorkspaceRoot, String filterKind) {
-        String[] command = {"bazel", "query", "kind(" + filterKind + ",//...)"};
-        var output = fork(bazelWorkspaceRoot, command);
+        String[] command = {"bazel", "query", "--keep_going", "kind(" + filterKind + ",//...)"};
+        var output = fork(bazelWorkspaceRoot, command, true);
         if (output == NOT_FOUND) {
             return Set.of();
         }
@@ -401,13 +402,14 @@ private Set<String> bazelAQuery(
         String[] command = {
             "bazel",
             "aquery",
+            "--keep_going",
             "--output=proto",
             "--include_aspects", // required for java_proto_library, see
             // https://stackoverflow.com/questions/63430530/bazel-aquery-returns-no-action-information-for-java-proto-library
             "--allow_analysis_failures",
             "mnemonic(" + filterMnemonic + ", " + kindUnion + ")"
         };
-        var output = fork(bazelWorkspaceRoot, command);
+        var output = fork(bazelWorkspaceRoot, command, true);
         if (output == NOT_FOUND) {
             return Set.of();
         }
@@ -509,7 +511,7 @@ private static String buildPath(List<PathFragment> fragments, int id) {
         throw new RuntimeException();
     }
 
-    private static Path fork(Path workspaceRoot, String[] command) {
+    private static Path fork(Path workspaceRoot, String[] command, boolean allowNonZeroExit) {
         try {
             LOG.info("Running " + String.join(" ", command) + " ...");
             var output = Files.createTempFile("java-language-server-bazel-output", ".proto");
@@ -524,7 +526,9 @@ private static Path fork(Path workspaceRoot, String[] command) {
             var result = process.waitFor();
             if (result != 0) {
                 LOG.severe("`" + String.join(" ", command) + "` returned " + result);
-                return NOT_FOUND;
+                if (!allowNonZeroExit) {
+                    return NOT_FOUND;
+                }
             }
             return output;
         } catch (InterruptedException | IOException e) {

src/test/examples/bazel-project-broken/.bazelversion

@@ -0,0 +1 @@
+4.2.4

src/test/examples/bazel-project-broken/.gitignore

@@ -0,0 +1 @@
+bazel-*

src/test/examples/bazel-project-broken/WORKSPACE

@@ -0,0 +1,32 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+RULES_JVM_EXTERNAL_TAG = "4.2"
+RULES_JVM_EXTERNAL_SHA = "cd1a77b7b02e8e008439ca76fd34f5b07aecb8c752961f9640dea15e9e5ba1ca"
+
+http_archive(
+    name = "rules_jvm_external",
+    sha256 = RULES_JVM_EXTERNAL_SHA,
+    strip_prefix = "rules_jvm_external-%s" % RULES_JVM_EXTERNAL_TAG,
+    url = "https://github.com/bazelbuild/rules_jvm_external/archive/%s.zip" % RULES_JVM_EXTERNAL_TAG,
+)
+
+load("@rules_jvm_external//:repositories.bzl", "rules_jvm_external_deps")
+
+rules_jvm_external_deps()
+
+load("@rules_jvm_external//:setup.bzl", "rules_jvm_external_setup")
+
+rules_jvm_external_setup()
+
+load("@rules_jvm_external//:defs.bzl", "maven_install")
+
+maven_install(
+    artifacts = [
+        "com.google.guava:guava:18.0",
+    ],
+    repositories = [
+        "https://jcenter.bintray.com/",
+        "https://repo1.maven.org/maven2",
+    ],
+    fetch_sources = True,
+)

src/test/examples/bazel-project-broken/broken/BUILD

@@ -0,0 +1 @@
+fail("intentionally broken")

src/test/examples/bazel-project-broken/hello/BUILD

@@ -0,0 +1,9 @@
+java_binary(
+    name = "main",
+    srcs = glob(["src/**/*.java"]),
+    main_class = "Hello",
+    visibility = ["//visibility:public"],
+    deps = [
+        "@maven//:com_google_guava_guava",
+    ],
+)

src/test/examples/bazel-project-broken/hello/src/Hello.java

@@ -0,0 +1,5 @@
+class Hello {
+    public static void main(String[] args) {
+        System.out.println("Hello, world!");
+    }
+}

src/test/examples/bazel-project/.bazelversion

@@ -0,0 +1 @@
+4.2.4

src/test/examples/bazel-protos-project/.bazelversion

@@ -0,0 +1 @@
+4.2.4