Merge pull request #166 from haberman/bazel25

Compatibility with Bazel 0.25.2 and 0.24.1.

BUILD

@@ -543,8 +543,8 @@ genrule(
     name = "generate_json_ragel",
     srcs = ["upb/json/parser.rl"],
     outs = ["upb/json/parser.c"],
-    cmd = "$(location @ragel//:ragel) -C -o upb/json/parser.c $< && mv upb/json/parser.c $@",
-    tools = ["@ragel"],
+    cmd = "$(location @ragel//:ragelc) -C -o upb/json/parser.c $< && mv upb/json/parser.c $@",
+    tools = ["@ragel//:ragelc"],
 )
 
 genrule(

CMakeLists.txt

@@ -115,6 +115,7 @@ target_link_libraries(upb_pb
   table
   upb)
 add_library(upb_json
+  generated_for_cmake/upb/json/parser.c
   upb/json/printer.c
   upb/json/parser.h
   upb/json/printer.h)

WORKSPACE

@@ -3,6 +3,11 @@ workspace(name = "upb")
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+load(":repository_defs.bzl", "bazel_version_repository")
+
+bazel_version_repository(
+    name = "bazel_version"
+)
 
 http_archive(
     name = "lua",
@@ -17,11 +22,16 @@ http_archive(
 
 git_repository(
     name = "com_google_protobuf",
-    commit = "25feb59620627b673df76813dfd66e3f565765e7",
-    #sha256 = "d7a221b3d4fb4f05b7473795ccea9e05dab3b8721f6286a95fffbffc2d926f8b",
-    remote = "https://github.com/haberman/protobuf.git",
-    shallow_since = "1541281400 -0700"
-    #tag = "conformance-build-tag",
+    remote = "https://github.com/protocolbuffers/protobuf.git",
+    commit = "78ca77ac8799f67fda7b9a01cc691cd9fe526f25",
+)
+
+http_archive(
+    name = "zlib",
+    build_file = "@com_google_protobuf//:third_party/zlib.BUILD",
+    sha256 = "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1",
+    strip_prefix = "zlib-1.2.11",
+    urls = ["https://zlib.net/zlib-1.2.11.tar.gz"],
 )
 
 git_repository(
@@ -41,7 +51,6 @@ http_archive(
 
 http_archive(
    name = "bazel_skylib",
-    sha256 = "bbccf674aa441c266df9894182d80de104cabd19be98be002f6d478aaa31574d",
-    strip_prefix = "bazel-skylib-2169ae1c374aab4a09aa90e65efe1a3aad4e279b",
-    urls = ["https://github.com/bazelbuild/bazel-skylib/archive/2169ae1c374aab4a09aa90e65efe1a3aad4e279b.tar.gz"],
+   strip_prefix = "bazel-skylib-master",
+   urls = ["https://github.com/bazelbuild/bazel-skylib/archive/master.tar.gz"],
 )

build_defs.bzl

@@ -1,3 +1,9 @@
+
+load("@bazel_skylib//lib:paths.bzl", "paths")
+load("@bazel_skylib//lib:versions.bzl", "versions")
+load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain")
+load("@bazel_version//:bazel_version.bzl", "bazel_version")
+
 _shell_find_runfiles = """
   # --- begin runfiles.bash initialization ---
   # Copy-pasted from Bazel's Bash runfiles library (tools/bash/runfiles/runfiles.bash).
@@ -23,10 +29,6 @@ _shell_find_runfiles = """
   # --- end runfiles.bash initialization ---
 """
 
-load("@bazel_skylib//lib:paths.bzl", "paths")
-load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain")
-load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "CPP_LINK_STATIC_LIBRARY_ACTION_NAME")
-
 def _librule(name):
     return name + "_lib"
 
@@ -272,19 +274,19 @@ def filter_none(elems):
 
 # upb_proto_library() rule
 
-def cc_library_func(ctx, hdrs, srcs, deps):
-    compilation_contexts = []
-    linking_contexts = []
-    for dep in deps:
-        if CcInfo in dep:
-            linking_contexts.append(dep[CcInfo].linking_context)
-            compilation_contexts.append(dep[CcInfo].compilation_context)
+def cc_library_func(ctx, name, hdrs, srcs, dep_ccinfos):
+    compilation_contexts = [info.compilation_context for info in dep_ccinfos]
+    linking_contexts = [info.linking_context for info in dep_ccinfos]
     toolchain = find_cpp_toolchain(ctx)
     feature_configuration = cc_common.configure_features(
         cc_toolchain = toolchain,
         requested_features = ctx.features,
         unsupported_features = ctx.disabled_features,
     )
+
+    if is_bazel:
+        if bazel_version == "0.24.1":
+            # Compatibility code until gRPC is on 0.25.2 or later.
             compilation_info = cc_common.compile(
                 ctx = ctx,
                 feature_configuration = feature_configuration,
@@ -300,12 +302,37 @@ def cc_library_func(ctx, hdrs, srcs, deps):
                 cc_compilation_outputs = compilation_info.cc_compilation_outputs,
                 linking_contexts = linking_contexts,
             )
-
             return CcInfo(
                 compilation_context = compilation_info.compilation_context,
                 linking_context = linking_info.linking_context,
             )
 
+        if not versions.is_at_least("0.25.2", bazel_version):
+            fail("upb requires Bazel >=0.25.2 or 0.24.1")
+
+    (compilation_context, compilation_outputs) = cc_common.compile(
+        actions = ctx.actions,
+        feature_configuration = feature_configuration,
+        cc_toolchain = toolchain,
+        name = name,
+        srcs = srcs,
+        public_hdrs = hdrs,
+        compilation_contexts = compilation_contexts,
+    )
+    (linking_context, linking_outputs) = cc_common.create_linking_context_from_compilation_outputs(
+        actions = ctx.actions,
+        name = name,
+        feature_configuration = feature_configuration,
+        cc_toolchain = toolchain,
+        compilation_outputs = compilation_outputs,
+        linking_contexts = linking_contexts,
+    )
+
+    return CcInfo(
+        compilation_context = compilation_context,
+        linking_context = linking_context,
+    )
+
 def _compile_upb_protos(ctx, proto_info, proto_sources, ext):
     srcs = [_generate_output_file(ctx, name, ext + ".c") for name in proto_sources]
     hdrs = [_generate_output_file(ctx, name, ext + ".h") for name in proto_sources]
@@ -352,11 +379,14 @@ def _upb_proto_rule_impl(ctx):
 def _upb_proto_aspect_impl(target, ctx):
     proto_info = target[ProtoInfo]
     files = _compile_upb_protos(ctx, proto_info, proto_info.direct_sources, ctx.attr._ext)
+    deps = ctx.rule.attr.deps + [ctx.attr._upb]
+    dep_ccinfos = [dep[CcInfo] for dep in deps if CcInfo in dep]
     cc_info = cc_library_func(
         ctx = ctx,
+        name = ctx.rule.attr.name,
         hdrs = files.hdrs,
         srcs = files.srcs,
-        deps = ctx.rule.attr.deps + [ctx.attr._upb],
+        dep_ccinfos = dep_ccinfos,
     )
     return [cc_info]
 

ragel.BUILD

@@ -4,7 +4,7 @@ package(
 )
 
 cc_binary(
-    name = "ragel",
+    name = "ragelc",
     srcs = [
         "ragel/rubycodegen.cpp",
         "ragel/goipgoto.h",

repository_defs.bzl

@@ -0,0 +1,16 @@
+
+# A hacky way to work around the fact that native.bazel_version is only
+# available from WORKSPACE macros, not BUILD macros or rules.
+#
+# Hopefully we can remove this if/when this is fixed:
+#   https://github.com/bazelbuild/bazel/issues/8305
+
+def _impl(repository_ctx):
+    s = "bazel_version = \"" + native.bazel_version + "\""
+    repository_ctx.file("bazel_version.bzl", s)
+    repository_ctx.file("BUILD", "")
+
+bazel_version_repository = repository_rule(
+    implementation=_impl,
+    local=True,
+)

tools/make_cmakelists.py

@@ -43,8 +43,8 @@ class BuildFileFunctions(object):
     for file in files:
         if os.path.isfile(file):
             found_files.append(file)
-        elif os.path.isfile("generated/" + file):
-            found_files.append("generated/" + file)
+        elif os.path.isfile("generated_for_cmake/" + file):
+            found_files.append("generated_for_cmake/" + file)
         else:
             print("Warning: no such file: " + file)
 
@@ -175,6 +175,9 @@ class WorkspaceFileFunctions(object):
   def git_repository(self, **kwargs):
     pass
 
+  def bazel_version_repository(self, **kwargs):
+    pass
+
 
 class Converter(object):
   def __init__(self):