bazel: Allow to distdir all dependencies

To use --distdir option of Bazel (which allows to use previously
fetched tarballs instead of downloading dependencies during
build), all dependencies should use http instead of git and need
to have sha256 sums specified.

Signed-off-by: Michal Rostecki <[email protected]>

Author: vadorovsky

repositories.bzl

@@ -14,18 +14,28 @@
 #
 ################################################################################
 #
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+ABSEIL_COMMIT = "99477fa9f1e89a7d8253c8aeee331864710d080c"
+ABSEIL_SHA256 = "495e8e1c481018126b2a84bfe36e273907ce282b135e7d161e138e463d295f3d"
+
 def absl_repositories(bind=True):
-    native.git_repository(
+    http_archive(
         name = "com_google_absl",
-        commit = "99477fa9f1e89a7d8253c8aeee331864710d080c",
-        remote = "https://github.com/abseil/abseil-cpp",
+        strip_prefix = "abseil-cpp-" + ABSEIL_COMMIT,
+        url = "https://github.com/abseil/abseil-cpp/archive/" + ABSEIL_COMMIT + ".tar.gz",
+        sha256 = ABSEIL_SHA256,
     )
 
+PROTOBUF_COMMIT = "106ffc04be1abf3ff3399f54ccf149815b287dd9"  # v3.5.1
+PROTOBUF_SHA256 = "ebc5f911ae580234da9cbcff03b841395bd97861efc82f67a165c5c3d366f2c6"
+
 def protobuf_repositories(bind=True):
-    native.git_repository(
+    http_archive(
         name = "protobuf_git",
-        commit = "106ffc04be1abf3ff3399f54ccf149815b287dd9",  # v3.5.1
-        remote = "https://github.com/google/protobuf.git",
+        strip_prefix = "protobuf-" + PROTOBUF_COMMIT,
+        url = "https://github.com/google/protobuf/archive/" + PROTOBUF_COMMIT + ".tar.gz",
+        sha256 = PROTOBUF_SHA256,
     )
 
     if bind:
@@ -59,6 +69,8 @@ def protobuf_repositories(bind=True):
             actual = "@protobuf_git//:protoc_lib",
         )
 
+GOOGLETEST_COMMIT = "43863938377a9ea1399c0596269e0890b5c5515a"
+GOOGLETEST_SHA256 = "7c8ece456ad588c30160429498e108e2df6f42a30888b3ec0abf5d9792d9d3a0"
 
 def googletest_repositories(bind=True):
     BUILD = """
@@ -122,11 +134,12 @@ cc_library(
     visibility = ["//visibility:public"],
 )
 """
-    native.new_git_repository(
+    http_archive(
         name = "googletest_git",
+        strip_prefix = "googletest-" + GOOGLETEST_COMMIT,
         build_file_content = BUILD,
-        commit = "43863938377a9ea1399c0596269e0890b5c5515a",
-        remote = "https://github.com/google/googletest.git",
+        url = "https://github.com/google/googletest/archive/" + GOOGLETEST_COMMIT + ".tar.gz",
+        sha256 = GOOGLETEST_SHA256,
     )
 
     if bind:
@@ -145,6 +158,9 @@ cc_library(
             actual = "@googletest_git//:googletest_prod",
         )
 
+GOOGLEAPIS_COMMIT = "5c6df0cd18c6a429eab739fb711c27f6e1393366" # May 14, 2017
+GOOGLEAPIS_SHA256 = "c6ce26246232c0f3e78d3a30f087444ec01c8ee64b34d058bfcd4f0f4a387a0b"
+
 def googleapis_repositories(protobuf_repo="@protobuf_git//", bind=True):
     BUILD = """
 # Copyright 2016 Google Inc. All Rights Reserved.
@@ -242,11 +258,12 @@ cc_proto_library(
 )
 """.format(protobuf_repo)
 
-    native.new_git_repository(
+    http_archive(
         name = "googleapis_git",
-        commit = "5c6df0cd18c6a429eab739fb711c27f6e1393366", # May 14, 2017
-        remote = "https://github.com/googleapis/googleapis.git",
+        strip_prefix = "googleapis-" + GOOGLEAPIS_COMMIT,
+        url = "https://github.com/googleapis/googleapis/archive/" + GOOGLEAPIS_COMMIT + ".tar.gz",
         build_file_content = BUILD,
+        sha256 = GOOGLEAPIS_SHA256,
     )
 
     if bind: