Add build information to the manifest of the standalone server

Apparently SauceLabs need this. Hopefully it properly duplicates the
information in the `build.properties` file, which is where Selenium
itself figures out where its version is. I'd expect these values to
get out of sync unless care is taken to maintain them being the same.

Author: shs96c

java/client/src/org/openqa/selenium/BUILD.bazel

@@ -88,8 +88,12 @@ javadoc(
 java_import(
     name = "manifest",
     jars = [
+        ":manifest-entries",
         ":manifest-jar",
     ],
+    visibility = [
+      "//java/server/src/org/openqa/selenium/grid:__pkg__",
+    ]
 )
 
 genrule(
@@ -119,3 +123,41 @@ genrule(
         "@bazel_tools//tools/zip:zipper",
     ],
 )
+
+genrule(
+  name = "manifest-entries",
+  outs = [
+      "manifest-entries.jar",
+  ],
+  cmd = select({
+      "//common:stamp": """
+      mkdir META-INF &&
+      echo Manifest-Version: 1.0 >META-INF/MANIFEST.MF &&
+      echo "" >>META-INF/MANIFEST.MF &&
+      echo "" >>META-INF/MANIFEST.MF &&
+      echo Name: Build-Info >>META-INF/MANIFEST.MF &&
+      echo Selenium-Version: %s >>META-INF/MANIFEST.MF &&
+      echo Build-Revision: $$(grep GIT_REVISION bazel-out/stable-status.txt | cut -d' ' -f 2) >>META-INF/MANIFEST.MF &&
+      echo Build-Time: $$(date) >>META-INF/MANIFEST.MF &&
+      $(location @bazel_tools//tools/zip:zipper) c $@ META-INF/MANIFEST.MF
+      """ % SE_VERSION,
+      "//conditions:default": """
+      mkdir META-INF &&
+      echo Manifest-Version: 1.0 >META-INF/MANIFEST.MF &&
+      echo "" >>META-INF/MANIFEST.MF &&
+      echo "" >>META-INF/MANIFEST.MF &&
+      echo Name: Build-Info >>META-INF/MANIFEST.MF &&
+      echo Selenium-Version: %s >>META-INF/MANIFEST.MF &&
+      echo Build-Revision: Unknown >>META-INF/MANIFEST.MF &&
+      echo Build-Time: Wed Jan 3 21:49:10 2007 +0000 >>META-INF/MANIFEST.MF &&
+      $(location @bazel_tools//tools/zip:zipper) c $@ META-INF/MANIFEST.MF
+      """ % SE_VERSION,
+  }),
+  stamp = select({
+      "//common:stamp": True,
+      "//conditions:default": False,
+  }),
+  tools = [
+      "@bazel_tools//tools/zip:zipper",
+  ],
+)

java/defs.bzl

@@ -6,6 +6,7 @@ load(
 load("@rules_jvm_external//:defs.bzl", _artifact = "artifact", _javadoc = "javadoc")
 load("//java/private:dist_zip.bzl", _java_dist_zip = "java_dist_zip")
 load("//java/private:library.bzl", _java_export = "java_export", _java_library = "java_library", _java_test = "java_test")
+load("//java/private:merge_jars.bzl", _merge_jars = "merge_jars")
 load("//java/private:module.bzl", _java_module = "java_module")
 load("//java/private:selenium_test.bzl", _selenium_test = "selenium_test")
 load("//java/private:spotbugs_config.bzl", _spotbugs_config = "spotbugs_config")
@@ -22,5 +23,6 @@ java_selenium_test_suite = _java_selenium_test_suite
 java_test = _java_test
 java_test_suite = _java_test_suite
 javadoc = _javadoc
+merge_jars = _merge_jars
 selenium_test = _selenium_test
 spotbugs_config = _spotbugs_config

java/private/merge_jars.bzl

@@ -0,0 +1,37 @@
+
+def _merge_jars_impl(ctx):
+  out = ctx.actions.declare_file("%s.jar" % ctx.label.name)
+
+  args = ctx.actions.args()
+  args.add("--output", out)
+  args.add_all(ctx.files.inputs, before_each = "--sources")
+
+  ctx.actions.run(
+    mnemonic = "MergeJars",
+    executable = ctx.executable._merge_jars,
+    inputs = ctx.files.inputs,
+    outputs = [out],
+    arguments = [args],
+  )
+
+  return [
+    DefaultInfo(files = depset([out]))
+  ]
+
+merge_jars = rule(
+  _merge_jars_impl,
+  attrs = {
+    "inputs": attr.label_list(
+      mandatory = True,
+      allow_files = True,
+    ),
+    "_merge_jars": attr.label(
+        executable = True,
+        cfg = "exec",
+        default = "@rules_jvm_external//private/tools/java/rules/jvm/external/jar:MergeJars",
+    ),
+    "_java_toolchain": attr.label(
+        default = "@bazel_tools//tools/jdk:current_java_toolchain",
+    ),
+  },
+)

java/server/src/org/openqa/selenium/grid/BUILD.bazel

@@ -1,17 +1,17 @@
 load("@rules_jvm_external//:defs.bzl", "artifact")
 load("//common:defs.bzl", "copy_file")
-load("//java:defs.bzl", "java_binary", "java_dist_zip", "java_export", "java_library", "javadoc")
+load("//java:defs.bzl", "java_binary", "java_dist_zip", "java_export", "java_library", "javadoc", "merge_jars")
 load("//java:version.bzl", "SE_VERSION")
 load("//java/client/src/org/openqa/selenium/devtools:versions.bzl", "CDP_DEPS")
 
 genrule(
     name = "executable-grid",
     srcs = [
         "zip-preamble.sh",
-        ":selenium_server_deploy.jar",
+        ":add-build-info",
     ],
     outs = ["selenium"],
-    cmd = "cat $(location :zip-preamble.sh) $(location :selenium_server_deploy.jar) > $@",
+    cmd = "cat $(location :zip-preamble.sh) $(location :add-build-info) > $@",
     executable = True,
     visibility = [
         "//:__pkg__",
@@ -90,6 +90,14 @@ java_export(
     ],
 )
 
+merge_jars(
+  name = "add-build-info",
+  inputs = [
+    ":selenium_server_deploy.jar",
+    "//java/client/src/org/openqa/selenium:manifest",
+  ],
+)
+
 java_binary(
     name = "selenium_server",
     main_class = "org.openqa.selenium.grid.Bootstrap",