protected int buildWithClasspath()

in src/com/facebook/buck/java/JavacInMemoryStep.java [287:349]
58 lines of code
13 McCabe index (conditional complexity)

  protected int buildWithClasspath(ExecutionContext context, Set<String> buildClasspathEntries) {
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    Preconditions.checkNotNull(compiler,
        "If using JRE instead of JDK, ToolProvider.getSystemJavaCompiler() may be null.");
    StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
    Iterable<? extends JavaFileObject> compilationUnits;
    try {
      compilationUnits = createCompilationUnits(
          fileManager, context.getProjectFilesystem().getPathRelativizer());
    } catch (IOException e) {
      e.printStackTrace(context.getStdErr());
      return 1;
    }

    DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();
    List<String> options = getOptions(context, buildClasspathEntries);
    List<String> classNamesForAnnotationProcessing = ImmutableList.of();
    Writer compilerOutputWriter = new PrintWriter(context.getStdErr());
    JavaCompiler.CompilationTask compilationTask = compiler.getTask(
        compilerOutputWriter,
        fileManager,
        diagnostics,
        options,
        classNamesForAnnotationProcessing,
        compilationUnits);

    // Invoke the compilation and inspect the result.
    boolean isSuccess = compilationTask.call();
    if (isSuccess) {
      if (abiKeyFile != null) {
        try {
          String firstLine = Files.readFirstLine(abiKeyFile, Charsets.UTF_8);
          if (firstLine != null) {
            abiKey = new Sha1HashCode(firstLine);
          }
        } catch (IOException e) {
          e.printStackTrace(context.getStdErr());
          return 1;
        }
      }
      return 0;
    } else {
      if (context.getVerbosity().shouldPrintStandardInformation()) {
        int numErrors = 0;
        int numWarnings = 0;
        for (Diagnostic<? extends JavaFileObject> diagnostic : diagnostics.getDiagnostics()) {
          Diagnostic.Kind kind = diagnostic.getKind();
          if (kind == Diagnostic.Kind.ERROR) {
            ++numErrors;
          } else if (kind == Diagnostic.Kind.WARNING || kind == Diagnostic.Kind.MANDATORY_WARNING) {
            ++numWarnings;
          }

          context.getStdErr().println(diagnostic);
        }

        if (numErrors > 0 || numWarnings > 0) {
          context.getStdErr().printf("Errors: %d. Warnings: %d.\n", numErrors, numWarnings);
        }
      }
      return 1;
    }
  }