Buck: Disable cast checking in GWT compiler only in release mode

DisableCastChecking option was first added in I5dc633d5b. Since Issue
3389, that caused breakage of all Google products for many weeks, this
option is added again in the development build to prevent such severe
regressions in future.

Because the generated javascript code is bigger with cast checks, this
option is still added in release mode.

Side effect of this change is that the plugins that expose GWT module
are compiled without DisableCastChecking option in Gerrit tree mode.
Standalone bucklets driven build mode is not affected by this change.

Another side effect, that 'soyc' target for "compiler story" was
duplicated and the corresponding release mode with DisableCastChecking
is also provided with alias 'soyc_r'.

TEST PLAN:

  $ buck build gerrit

should pass only -XdisableClassMetadata option to GWT compiler. Whereas

  $ buck build release

should pass both -XdisableClassMetadata -XdisableCastChecking options.

Bug: Issue 3389
Change-Id: Ia99647357e7bff889137d4855e9c0059e6c6a4f3

.buckconfig

@@ -13,6 +13,7 @@
   release = //:release
   safari = //:safari
   soyc = //gerrit-gwtui:ui_soyc
+  soyc_r = //gerrit-gwtui:ui_soyc_r
   withdocs = //:withdocs
 
 [buildfile]

BUCK

@@ -6,7 +6,7 @@ gerrit_war(name = 'chrome',   ui = 'ui_chrome')
 gerrit_war(name = 'firefox',  ui = 'ui_firefox')
 gerrit_war(name = 'safari',   ui = 'ui_safari')
 gerrit_war(name = 'withdocs', docs = True)
-gerrit_war(name = 'release',  docs = True, context = ['//plugins:core'],  visibility = ['//tools/maven:'])
+gerrit_war(name = 'release',  ui = 'ui_optdbg_r', docs = True, context = ['//plugins:core'],  visibility = ['//tools/maven:'])
 
 API_DEPS = [
   '//gerrit-extension-api:extension-api',

gerrit-gwtui/BUCK

@@ -1,62 +1,13 @@
 include_defs('//gerrit-gwtui/gwt.defs')
 include_defs('//tools/gwt-constants.defs')
-from multiprocessing import cpu_count
 
-CPU_COUNT = cpu_count()
 DEPS = GWT_COMMON_DEPS + [
   '//gerrit-gwtexpui:CSS',
   '//lib:gwtjsonrpc',
 ]
 
-genrule(
-  name = 'ui_optdbg',
-  cmd = 'cd $TMP;' +
-    'unzip -q $(location :ui_dbg);' +
-    'mv' +
-    ' gerrit_ui/gerrit_ui.nocache.js' +
-    ' gerrit_ui/dbg_gerrit_ui.nocache.js;' +
-    'unzip -qo $(location :ui_opt);' +
-    'mkdir -p \$(dirname $OUT);' +
-    'zip -qr $OUT .',
-  out = 'ui_optdbg.zip',
-  visibility = ['PUBLIC'],
-)
-
-gwt_binary(
-  name = 'ui_opt',
-  modules = [MODULE],
-  module_deps = [':ui_module'],
-  deps = DEPS + ([':ui_dbg'] if CPU_COUNT < 8 else []),
-  local_workers = CPU_COUNT,
-  strict = True,
-  experimental_args = GWT_COMPILER_ARGS,
-  vm_args = GWT_JVM_ARGS,
-)
-
-gwt_binary(
-  name = 'ui_soyc',
-  modules = [MODULE],
-  module_deps = [':ui_module'],
-  deps = DEPS + [':ui_dbg'],
-  local_workers = CPU_COUNT,
-  strict = True,
-  experimental_args = GWT_COMPILER_ARGS + ['-compileReport'],
-  vm_args = GWT_JVM_ARGS,
-)
-
-gwt_binary(
-  name = 'ui_dbg',
-  modules = [MODULE],
-  style = 'PRETTY',
-  optimize = 0,
-  module_deps = [':ui_module'],
-  deps = DEPS,
-  local_workers = CPU_COUNT,
-  strict = True,
-  experimental_args = GWT_COMPILER_ARGS,
-  vm_args = GWT_JVM_ARGS,
-  visibility = ['//:eclipse'],
-)
+gwt_genrule(MODULE, DEPS)
+gwt_genrule(MODULE, DEPS, '_r')
 
 gwt_user_agent_permutations(
   name = 'ui',

gerrit-gwtui/gwt.defs

@@ -11,6 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+from multiprocessing import cpu_count
 
 BROWSERS = [
   'chrome',
@@ -25,6 +26,63 @@ ALIASES = {
   'msie': 'ie9',
 }
 MODULE = 'com.google.gerrit.GerritGwtUI'
+CPU_COUNT = cpu_count()
+
+def gwt_genrule(module, deps, suffix = ""):
+  dbg = 'ui_dbg' + suffix
+  opt = 'ui_opt' + suffix
+  soyc = 'ui_soyc' + suffix
+  args = GWT_COMPILER_ARGS_RELEASE_MODE if suffix == "_r" else GWT_COMPILER_ARGS
+
+  genrule(
+    name = 'ui_optdbg' + suffix,
+    cmd = 'cd $TMP;' +
+      'unzip -q $(location :%s);' % dbg +
+      'mv' +
+      ' gerrit_ui/gerrit_ui.nocache.js' +
+      ' gerrit_ui/dbg_gerrit_ui.nocache.js;' +
+      'unzip -qo $(location :%s);' % opt +
+      'mkdir -p \$(dirname $OUT);' +
+      'zip -qr $OUT .',
+    out = 'ui_optdbg' + suffix + '.zip',
+    visibility = ['PUBLIC'],
+  )
+
+  gwt_binary(
+    name = opt,
+    modules = [module],
+    module_deps = [':ui_module'],
+    deps = deps + ([':' + dbg] if CPU_COUNT < 8 else []),
+    local_workers = CPU_COUNT,
+    strict = True,
+    experimental_args = args,
+    vm_args = GWT_JVM_ARGS,
+  )
+
+  gwt_binary(
+    name = dbg,
+    modules = [module],
+    style = 'PRETTY',
+    optimize = 0,
+    module_deps = [':ui_module'],
+    deps = deps,
+    local_workers = CPU_COUNT,
+    strict = True,
+    experimental_args = args,
+    vm_args = GWT_JVM_ARGS,
+    visibility = ['//:eclipse'],
+  )
+
+  gwt_binary(
+    name = soyc,
+    modules = [module],
+    module_deps = [':ui_module'],
+    deps = deps + [':' + dbg],
+    local_workers = CPU_COUNT,
+    strict = True,
+    experimental_args = args + ['-compileReport'],
+    vm_args = GWT_JVM_ARGS,
+   )
 
 def gwt_user_agent_permutations(
     name,
@@ -37,7 +95,6 @@ def gwt_user_agent_permutations(
     deps = [],
     browsers = BROWSERS,
     visibility = []):
-  from multiprocessing import cpu_count
   for ua in browsers:
     impl = ua
     if ua in ALIASES:
@@ -74,7 +131,7 @@ def gwt_user_agent_permutations(
       draft_compile = draft_compile,
       module_deps = module_deps + [':%s_gwtxml_lib' % gwt_name],
       deps = deps,
-      local_workers = cpu_count(),
+      local_workers = CPU_COUNT,
       strict = True,
       experimental_args = GWT_COMPILER_ARGS,
       vm_args = GWT_JVM_ARGS,

tools/gwt-constants.defs

@@ -2,6 +2,9 @@ GWT_JVM_ARGS = ['-Xmx512m']
 
 GWT_COMPILER_ARGS = [
   '-XdisableClassMetadata',
+]
+
+GWT_COMPILER_ARGS_RELEASE_MODE = GWT_COMPILER_ARGS + [
   '-XdisableCastChecking',
 ]