Linux create_sdk GN build for host

pkg/BUILD.gn

+# Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+template("make_third_party_pkg_files_stamp") {

[Cutch, 2016/09/29 16:41:26]

Could this be factored into a template that is shared between this file and
utils/compiler/BUILD.gn ?

[zra, 2016/09/29 17:46:41]

Done.

+  assert(defined(invoker.pattern), "Must define the file pattern")
+  assert(defined(invoker.id), "Must define the stamp file id")
+  pattern = invoker.pattern
+  id = invoker.id
+  action(target_name) {
+    files = exec_script("../tools/list_files.py",
+                        [pattern, rebase_path("../third_party/pkg")],
+                        "list lines")
+    inputs = [ "../tools/list_files.py" ] +
+             rebase_path(files, "//", ".")
+
+    outputs = [
+      "$target_gen_dir/third_party_pkg_files_$id.stamp"
+    ]
+
+    script = "../tools/create_timestamp_file.py"
+    args = [
+      rebase_path("$target_gen_dir/third_party_pkg_files_$id.stamp"),
+    ]
+  }
+}
+
+make_third_party_pkg_files_stamp("make_third_party_pkg_files_1_stamp") {
+  pattern = "^(?!.*_test\.dart).*[a-k]\.dart\$"
+  id = "1"
+}
+
+make_third_party_pkg_files_stamp("make_third_party_pkg_files_2_stamp") {
+  pattern = "^(?!.*_test\.dart).*[l-r]\.dart\$"
+  id = "2"
+}
+
+make_third_party_pkg_files_stamp("make_third_party_pkg_files_3_stamp") {
+  pattern = "^(?!.*_test\.dart).*[^a-r]\.dart\$"
+  id = "3"
+}
+
+action("pkg_files_stamp") {
+  deps = [
+    ":make_third_party_pkg_files_1_stamp",
+    ":make_third_party_pkg_files_2_stamp",
+    ":make_third_party_pkg_files_3_stamp",
+  ]
+
+  files = exec_script("../tools/list_files.py",
+                      ["^(?!.*/test/).*(?<!_test)[.]dart\$",
+                      rebase_path(".")],
+                      "list lines")
+
+  stamp1_outputs = get_target_outputs(":make_third_party_pkg_files_1_stamp")
+  stamp2_outputs = get_target_outputs(":make_third_party_pkg_files_2_stamp")
+  stamp3_outputs = get_target_outputs(":make_third_party_pkg_files_3_stamp")
+
+  inputs = ["../tools/list_files.py"] +
+      rebase_path(files, "//", ".") +
+      stamp1_outputs +
+      stamp2_outputs +
+      stamp3_outputs
+
+  outputs = [
+    "$root_gen_dir/pkg_files.stamp"
+  ]
+
+  script = "../tools/create_timestamp_file.py"
+  args = [
+    rebase_path("$root_gen_dir/pkg_files.stamp"),
+  ]
+}