Add a per-scala-version test for dependency analyzer (#971)

* multi_version

* change

* empty

CONTRIBUTING.md

@@ -46,3 +46,10 @@ you can use the `lint.sh` script:
 
 Note that Skylint failures are ignored and that the fix
 command will modify your files in place.
+
+### Additional Tests to Run
+Some changes reqiring running additional tests which are not currently
+part of the CI pipeline.
+
+When editing code in `./third_party`, please run `./dangerous_test_thirdparty_version.sh`
+but read the comments at the beginning of the file first.

dangerous_test_thirdparty_version.sh

@@ -0,0 +1,148 @@
+#!/usr/bin/env bash
+
+# This test is dangerous in that it modifies the root rules_scala
+# WORKSPACE file. It attempts to restore the existing WORKSPACE file
+# but there are risks that it may not be successful.
+
+# Hence when running this test one should be sure that they do not
+# have changes in the WORKSPACE file which they cannot recover
+# from if the file gets lost.
+
+# Note that due to performance constraints this is purposely not
+# part of CI but when modifying the dependency_analyzer plugin,
+# this should be run to ensure no regressions.
+
+set -e
+
+replace_workspace() {
+  sed -i '' \
+      -e "s|scala_repositories(.*)|$1|" \
+      $dir/WORKSPACE
+}
+
+test_scala_version() {
+  SCALA_VERSION=$1
+
+  SCALA_VERSION_SHAS=''
+  SCALA_VERSION_SHAS+='"scala_compiler": "'$2'",'
+  SCALA_VERSION_SHAS+='"scala_library": "'$3'",'
+  SCALA_VERSION_SHAS+='"scala_reflect": "'$4'"'
+
+  cp $dir/WORKSPACE $dir/WORKSPACE.bak
+  replace_workspace "scala_repositories((\"$SCALA_VERSION\", { $SCALA_VERSION_SHAS }))"
+
+  bazel test //third_party/...
+  RESPONSE_CODE=$?
+  # Restore old behavior
+  rm $dir/WORKSPACE
+  mv $dir/WORKSPACE.bak $dir/WORKSPACE
+  exit $RESPONSE_CODE
+
+}
+
+dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+test_dir=$dir/test/shell
+# shellcheck source=./test_runner.sh
+. "${test_dir}"/test_runner.sh
+runner=$(get_test_runner "${1:-local}")
+
+
+# Latest versions of each major version
+
+$runner test_scala_version "2.12.10" \
+    "cedc3b9c39d215a9a3ffc0cc75a1d784b51e9edc7f13051a1b4ad5ae22cfbc0c" \
+    "0a57044d10895f8d3dd66ad4286891f607169d948845ac51e17b4c1cf0ab569d" \
+    "56b609e1bab9144fb51525bfa01ccd72028154fc40a58685a1e9adcbe7835730"
+
+
+$runner test_scala_version "2.11.12" \
+    "3e892546b72ab547cb77de4d840bcfd05c853e73390fed7370a8f19acb0735a0" \
+    "0b3d6fd42958ee98715ba2ec5fe221f4ca1e694d7c981b0ae0cd68e97baf6dce" \
+    "6ba385b450a6311a15c918cf8688b9af9327c6104f0ecbd35933cfcd3095fe04"
+
+
+# Earliest functioning versions of each major version
+
+$runner test_scala_version "2.12.0" \
+    "c767f79f9c529cedba2805db910164d5846f1f6d02424c6d7aadfc42ae5dadf1" \
+    "0e72ec4ea955d0bad7f1a494e8df95163f1631df0ce8ec4f9f278fe4d5fd1824" \
+    "f56553934378e6d3e8bf1d759a51f8b2fc4c99370774f0aaedaab8619517ccbe"
+
+
+# Note: 2.11.0-2.11.8 do not work due to an error unrelated to the plugin
+# Error is that argument -Ypartial-unification is invalid
+# Hence we start with 2.11.9.
+$runner test_scala_version "2.11.9" \
+    "fa01b414674cb38adc90ccf7a2042e82198dbb19dc41faccf0b5941ec08b1998" \
+    "e435d5ef31cc12dbf66719b7d5ab677ad739c63c3e451757b9688dcbeda0a984" \
+    "d932f809012d2cf832226b52a8bd82ed35b0257b1471c98968c0cd9ddf5327ab"
+
+# Intermediate versions of 2.12.x
+
+$runner test_scala_version "2.12.1" \
+    "fdd7679ce8a3fb4e30fbb9eaf9451f42c042f5ac3b5497f0fd01c379a3df9b3f" \
+    "9dab78f3f205a038f48183b2391f8a593235f794d8129a479e06af3e6bc50ef8" \
+    "d8a2b9d6d78c7457a40e394dc0c4fa6d6244acf0d156bbbcb311a9d497b85eec"
+
+
+$runner test_scala_version "2.12.2" \
+    "b3d41a2887c114821878d45c1cb43cf7576c6854c7a303ef3d7be866dc44de34" \
+    "dd668b609002b3578f2db83a1a684d706155bba2fc801cd411359fdd48218d00" \
+    "98f9876d14b39fc7ec863c6b1b73c41a7653f886901b3ead0c4ca9215a688408"
+
+
+$runner test_scala_version "2.12.3" \
+    "99d28c90ef1b8569da76a7e04415184cc54b57221ee259ffc55b2fcd64fb2107" \
+    "a8dd181a996dcc53a8c0bbb554bef7a1a9017ca09a377603167cf15444a85404" \
+    "93db412846912a1c212dd83c36dd51aa0adb9f39bfa6c4c3d65682afc94366c4"
+
+
+$runner test_scala_version "2.12.4" \
+    "8b681302aac584f7234547eed04d2beeeb4a4f00032220e29d40943be6906a01" \
+    "17824fcee4d3f46cfaa4da84ebad4f58496426c2b9bc9e341f812ab23a667d5d" \
+    "ea70fe0e550e24d23fc52a18963b2be9c3b24283f4cb18b98327eb72746567cc"
+
+
+$runner test_scala_version "2.12.5" \
+    "a113394b6f857e69ef5d95b77114ec3f12cb0e14d9ede32de0bbc9c36d677455" \
+    "c2636320d6479c82f2da6b8d76a820de9345a61327e648d4298a0048154fb87c" \
+    "27036d7574afff72294f0e63d54aa13acd8b16b525d51475691118b835e626e7"
+
+
+$runner test_scala_version "2.12.6" \
+    "3023b07cc02f2b0217b2c04f8e636b396130b3a8544a8dfad498a19c3e57a863" \
+    "f81d7144f0ce1b8123335b72ba39003c4be2870767aca15dd0888ba3dab65e98" \
+    "ffa70d522fc9f9deec14358aa674e6dd75c9dfa39d4668ef15bb52f002ce99fa"
+
+
+$runner test_scala_version "2.12.7" \
+    "6e80ef4493127214d31631287a6789170bf6c9a771d6094acd8dc785e8970270" \
+    "8f3dc6091db688464ad8b1ee6c7343d7aa5940d474ee8b90406c71e45dd74fc0" \
+    "7427d7ee5771e8c36c1db5a09368fa3078f6eceb77d7c797a322a088c5dddb76"
+
+
+$runner test_scala_version "2.12.8" \
+    "f34e9119f45abd41e85b9e121ba19dd9288b3b4af7f7047e86dc70236708d170" \
+    "321fb55685635c931eba4bc0d7668349da3f2c09aee2de93a70566066ff25c28" \
+    "4d6405395c4599ce04cea08ba082339e3e42135de9aae2923c9f5367e957315a"
+
+
+$runner test_scala_version "2.12.9" \
+    "5fd556459fd189b820db7d7c0a644ea5f7e8e032c421f2ad47038e72247fbf65" \
+    "364ee6ffd45f4fb8f9de40d1473d266ed5c199a44c1d4e2bdc895b1fbe35c75f" \
+    "4285ba64044d1a62b19304fe3ddd0088da240649c9fe2a6571c989feda1d0829"
+
+
+# Intermediate versions of 2.11.x
+
+
+$runner test_scala_version "2.11.10" \
+    "b70b748857213efe6f3a47d66acfa014c1bf51af3178b3a946eaae09f709fecc" \
+    "14a520328ea4ca7f423b30154a54d3df0a531a9c51f5e98eda272c9821bc5331" \
+    "fd896db4806875f538843ea24411e483ee4d0734710a108d0308ef108e83cf80"
+
+
+$runner test_scala_version "2.11.11" \
+    "5f929ed57c515ef9545497374eec88ffd129b8f04079dedb7e32107104325cdd" \
+    "f2ba1550a39304e5d06caaddfa226cdf0a4cbccee189828fa8c1ddf1110c4872" \
+    "73aef1a6ccabd3a3c15cc153ec846e12d0f045587a2a1d88cc1b49293f47cb20"