Use fully qualified paths for C++ includes

This fixes #66.

--
MOS_MIGRATED_REVID=91083724

Author: kchodorow

src/main/java/com/google/devtools/build/lib/rules/cpp/CcCommon.java

@@ -526,14 +526,14 @@ List<PathFragment> getLooseIncludeDirs() {
     List<PathFragment> result = new ArrayList<>();
     // The package directory of the rule contributes includes. Note that this also covers all
     // non-subpackage sub-directories.
-    PathFragment rulePackage = ruleContext.getLabel().getPackageFragment();
+    PathFragment rulePackage = ruleContext.getLabel().getPackageIdentifier().getPathFragment();
     result.add(rulePackage);
 
     // Gather up all the dirs from the rule's srcs as well as any of the srcs outputs.
     if (hasAttribute("srcs", Type.LABEL_LIST)) {
       for (FileProvider src :
           ruleContext.getPrerequisites("srcs", Mode.TARGET, FileProvider.class)) {
-        PathFragment packageDir = src.getLabel().getPackageFragment();
+        PathFragment packageDir = src.getLabel().getPackageIdentifier().getPathFragment();
         for (Artifact a : src.getFilesToBuild()) {
           result.add(packageDir);
           // Attempt to gather subdirectories that might contain include files.
@@ -544,7 +544,8 @@ List<PathFragment> getLooseIncludeDirs() {
 
     // Add in any 'includes' attribute values as relative path fragments
     if (ruleContext.getRule().isAttributeValueExplicitlySpecified("includes")) {
-      PathFragment packageFragment = ruleContext.getLabel().getPackageFragment();
+      PathFragment packageFragment = ruleContext.getLabel().getPackageIdentifier()
+          .getPathFragment();
       // For now, anything with an 'includes' needs a blanket declaration
       result.add(packageFragment.getRelative("**"));
     }
@@ -570,7 +571,7 @@ List<PathFragment> getIncludeDirs() {
 
   private List<PathFragment> getIncludeDirsFromIncludesAttribute() {
     List<PathFragment> result = new ArrayList<>();
-    PathFragment packageFragment = ruleContext.getLabel().getPackageFragment();
+    PathFragment packageFragment = ruleContext.getLabel().getPackageIdentifier().getPathFragment();
     for (String includesAttr : ruleContext.attributes().get("includes", Type.STRING_LIST)) {
       includesAttr = ruleContext.expandMakeVariables("includes", includesAttr);
       if (includesAttr.startsWith("/")) {

src/test/shell/bazel/local_repository_test.sh

@@ -232,4 +232,59 @@ function test_default_ws() {
   bazel build //external:java >& $TEST_log || fail "Failed to build java"
 }
 
+function test_external_hdrs() {
+  local external_ws=$TEST_TMPDIR/path/to/my/lib
+  mkdir -p $external_ws
+  touch $external_ws/WORKSPACE
+  cat > $external_ws/greet_lib.h <<EOF
+void greet();
+EOF
+  cat > $external_ws/greet_lib.cc <<EOF
+#include <stdio.h>
+void greet() {
+  printf("Hello");
+}
+EOF
+  cat > $external_ws/BUILD <<EOF
+cc_library(
+    name = "greet_lib",
+    srcs = ["greet_lib.cc"],
+    hdrs = ["greet_lib.h"],
+    includes = [
+        ".",
+    ],
+    visibility = ["//visibility:public"],
+)
+EOF
+
+  cat > greeter.cc <<EOF
+#include "greet_lib.h"
+
+int main() {
+  greet();
+  return 0;
+}
+EOF
+  cat > BUILD <<EOF
+cc_binary(
+    name = "greeter",
+    srcs = ["greeter.cc"],
+    deps = ["//external:greet-lib"],
+)
+EOF
+  cat > WORKSPACE <<EOF
+local_repository(
+    name = "greet-ws",
+    path = "$external_ws",
+)
+bind(
+    name = "greet-lib",
+    actual = "@greet-ws//:greet_lib"
+)
+EOF
+
+  bazel run //:greeter >& $TEST_log || fail "Failed to run greeter"
+  expect_log "Hello"
+}
+
 run_suite "local repository tests"