Rename set to depset in .bzl files

`set` is a deprecated alias of `depset` and will be removed from Bazel
starting from 0.6.

Change-Id: I0d9ca334d7fd32a36c1af4ca6baaed08d1600a9a

tools/bzl/classpath.bzl

@@ -1,5 +1,5 @@
 def _classpath_collector(ctx):
-    all = set()
+    all = depset()
     for d in ctx.attr.deps:
         if hasattr(d, 'java'):
             all += d.java.transitive_runtime_deps

tools/bzl/gwt.bzl

@@ -193,7 +193,7 @@ def _gwt_binary_impl(ctx):
   )
 
 def _get_transitive_closure(ctx):
-  deps = set()
+  deps = depset()
   for dep in ctx.attr.module_deps:
     deps += dep.java.transitive_runtime_deps
     deps += dep.java.transitive_source_jars

tools/bzl/javadoc.bzl

@@ -17,8 +17,8 @@
 def _impl(ctx):
   zip_output = ctx.outputs.zip
 
-  transitive_jar_set = set()
-  source_jars = set()
+  transitive_jar_set = depset()
+  source_jars = depset()
   for l in ctx.attr.libs:
     source_jars += l.java.source_jars
     transitive_jar_set += l.java.transitive_deps

tools/bzl/js.bzl

@@ -124,18 +124,18 @@ bower_archive = repository_rule(
 )
 
 def _bower_component_impl(ctx):
-  transitive_zipfiles = set([ctx.file.zipfile])
+  transitive_zipfiles = depset([ctx.file.zipfile])
   for d in ctx.attr.deps:
     transitive_zipfiles += d.transitive_zipfiles
 
-  transitive_licenses = set()
+  transitive_licenses = depset()
   if ctx.file.license:
-    transitive_licenses += set([ctx.file.license])
+    transitive_licenses += depset([ctx.file.license])
 
   for d in ctx.attr.deps:
     transitive_licenses += d.transitive_licenses
 
-  transitive_versions = set(ctx.files.version_json)
+  transitive_versions = depset(ctx.files.version_json)
   for d in ctx.attr.deps:
     transitive_versions += d.transitive_versions
 
@@ -173,13 +173,13 @@ def _js_component(ctx):
     command = cmd,
     mnemonic = "GenBowerZip")
 
-  licenses = set()
+  licenses = depset()
   if ctx.file.license:
-    licenses += set([ctx.file.license])
+    licenses += depset([ctx.file.license])
 
   return struct(
     transitive_zipfiles=list([ctx.outputs.zip]),
-    transitive_versions=set([]),
+    transitive_versions=depset(),
     transitive_licenses=licenses)
 
 js_component = rule(
@@ -219,15 +219,15 @@ def bower_component(name, license=None, **kwargs):
 
 def _bower_component_bundle_impl(ctx):
   """A bunch of bower components zipped up."""
-  zips = set([])
+  zips = depset()
   for d in ctx.attr.deps:
     zips += d.transitive_zipfiles
 
-  versions = set([])
+  versions = depset()
   for d in ctx.attr.deps:
     versions += d.transitive_versions
 
-  licenses = set([])
+  licenses = depset()
   for d in ctx.attr.deps:
     licenses += d.transitive_versions
 

tools/bzl/pkg_war.bzl

@@ -73,7 +73,7 @@ def _war_impl(ctx):
   ]
 
   # Add lib
-  transitive_lib_deps = set()
+  transitive_lib_deps = depset()
   for l in ctx.attr.libs:
     if hasattr(l, 'java'):
       transitive_lib_deps += l.java.transitive_runtime_deps
@@ -85,7 +85,7 @@ def _war_impl(ctx):
     inputs.append(dep)
 
   # Add pgm lib
-  transitive_pgmlib_deps = set()
+  transitive_pgmlib_deps = depset()
   for l in ctx.attr.pgmlibs:
     transitive_pgmlib_deps += l.java.transitive_runtime_deps
 
@@ -95,7 +95,7 @@ def _war_impl(ctx):
       inputs.append(dep)
 
   # Add context
-  transitive_context_deps = set()
+  transitive_context_deps = depset()
   if ctx.attr.context:
     for jar in ctx.attr.context:
       if hasattr(jar, 'java'):

tools/bzl/plugin.bzl

@@ -59,7 +59,7 @@ def gerrit_plugin(
   if gwt_module:
     native.java_library(
       name = name + '__gwt_module',
-      resources = list(set(srcs + resources)),
+      resources = depset(srcs + resources).to_list(),
       runtime_deps = deps + GWT_PLUGIN_DEPS,
       visibility = ['//visibility:public'],
       **kwargs