go_bazel_test: wrapper and test library for running Bazel from go_test (

#2109)

go_bazel_test is a macro that wraps go_test. It will be used for
integration tests in rules_go as a replacement for bazel_test. The
macro adds dependencies on bazel_testing and runfiles from rules_go.

bazel_testing is a new test framework. Its TestMain function may be
called to construct a Bazel workspace (specified as a txtar
archive). Tests are run within this workspace. Bazel may be invoked
with the RunBazel function.

Updates #1508
Updates #1959

BUILD.bazel

@@ -89,3 +89,17 @@ lines_sorted_test(
 exports_files(["AUTHORS"])
 
 go_info()
+
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = [
+        "BUILD.bazel",
+        "WORKSPACE",
+        "//extras:all_files",
+        "//go:all_files",
+        "//proto:all_files",
+        "//third_party:all_files",
+    ],
+    visibility = ["//visibility:public"],
+)

extras/BUILD.bazel

@@ -3,3 +3,10 @@ filegroup(
     srcs = glob(["*.bzl"]) + ["//go/private:all_rules"],
     visibility = ["//visibility:public"],
 )
+
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)

go/BUILD.bazel

@@ -1,3 +1,15 @@
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = glob(["**"]) + [
+        "//go/platform:all_files",
+        "//go/toolchain:all_files",
+        "//go/tools:all_files",
+        "//go/private:all_files",
+    ],
+    visibility = ["//visibility:public"],
+)
+
 filegroup(
     name = "all_rules",
     srcs = glob(["*.bzl"]) + ["//go/private:all_rules"],

go/platform/BUILD.bazel

@@ -10,3 +10,10 @@ package(default_visibility = ["//visibility:public"])
 load(":list.bzl", "declare_config_settings")
 
 declare_config_settings()
+
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)

go/private/BUILD.bazel

@@ -4,6 +4,13 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)
+
 config_setting(
     name = "strip-always",
     values = {"strip": "always"},

go/toolchain/BUILD.bazel

@@ -6,3 +6,10 @@ load(
 package(default_visibility = ["//visibility:public"])
 
 declare_constraints()
+
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)

go/tools/BUILD.bazel

@@ -0,0 +1,10 @@
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = [
+        "//go/tools/bazel:all_files",
+        "//go/tools/builders:all_files",
+        "//go/tools/coverdata:all_files",
+    ],
+    visibility = ["//visibility:public"],
+)

go/tools/bazel/BUILD.bazel

@@ -19,3 +19,10 @@ go_test(
 )
 
 # Runfiles functionality in this package is tested by //tests/core/runfiles.
+
+filegroup(
+    name = "all_files",
+    testonly = True,
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)

go/tools/bazel_testing/BUILD.bazel

@@ -0,0 +1,12 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["bazel_testing.go"],
+    importpath = "github.com/bazelbuild/rules_go/go/tools/bazel_testing",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//go/tools/bazel:go_default_library",
+        "//go/tools/internal/txtar:go_default_library",
+    ],
+)