Install Hex and Rebar per OTP release

lib/mix/lib/mix/local.ex

@@ -198,26 +198,32 @@ defmodule Mix.Local do
 
   defp find_latest_eligible_version(entries, artifact_version) do
     elixir_version = Version.parse!(System.version())
+    otp_release = System.otp_release()
 
     entries
     |> Enum.reverse()
-    |> find_version(artifact_version, elixir_version)
+    |> find_version(artifact_version, elixir_version, otp_release)
   end
 
-  defp find_version(entries, artifact_version, elixir_version) do
+  defp find_version(entries, artifact_version, elixir_version, otp_release) do
     entries =
       if artifact_version do
         Enum.filter(entries, &(hd(&1) == artifact_version))
       else
         entries
       end
 
-    Enum.find_value(entries, &find_by_elixir_version(&1, elixir_version))
+    Enum.find_value(entries, &find_by_elixir_version(&1, elixir_version, otp_release))
   end
 
-  defp find_by_elixir_version([artifact_version, digest, hex_elixir_version | _], elixir_version) do
-    if Version.compare(hex_elixir_version, elixir_version) != :gt do
-      {hex_elixir_version, artifact_version, digest}
+  defp find_by_elixir_version(
+         [artifact_version, digest, hex_elixir_version, hex_otp_release | _],
+         elixir_version,
+         otp_release
+       ) do
+    if Version.compare(hex_elixir_version, elixir_version) != :gt and
+         hex_otp_release <= otp_release do
+      {hex_elixir_version, artifact_version, digest, hex_otp_release}
     end
   end
 end

lib/mix/lib/mix/rebar.ex

@@ -53,12 +53,18 @@ defmodule Mix.Rebar do
   @doc """
   Returns the path supposed to host the local copy of `rebar`.
 
-  The rebar3 installation is specific to the Elixir version,
+  The rebar3 installation is specific to the Elixir version and OTP release,
   in order to force updates when new Elixir versions come out.
   """
   def local_rebar_path(:rebar3) do
     [major, minor | _] = String.split(System.version(), ".")
-    Path.join([Mix.Utils.mix_home(), "elixir", "#{major}-#{minor}", "rebar3"])
+
+    Path.join([
+      Mix.Utils.mix_home(),
+      "elixir",
+      "#{major}-#{minor}-otp-#{System.otp_release()}",
+      "rebar3"
+    ])
   end
 
   @doc """

lib/mix/lib/mix/tasks/local.hex.ex

@@ -5,8 +5,8 @@
 defmodule Mix.Tasks.Local.Hex do
   use Mix.Task
 
-  @hex_list_path "/installs/hex-1.x.csv"
-  @hex_archive_path "/installs/[ELIXIR_VERSION]/hex-[HEX_VERSION].ez"
+  @hex_list_path "/installs/hex.csv"
+  @hex_archive_path "/installs/[ELIXIR_VERSION]/hex-[HEX_VERSION]-otp-[OTP_RELEASE].ez"
 
   @shortdoc "Installs Hex locally"
 
@@ -72,12 +72,13 @@ defmodule Mix.Tasks.Local.Hex do
   defp run_install(version, argv) do
     hex_url = Mix.Hex.url()
 
-    {elixir_version, hex_version, sha512} =
+    {elixir_version, hex_version, sha512, otp_release} =
       Mix.Local.find_matching_versions!("Hex", version, hex_url <> @hex_list_path)
 
     url =
       (hex_url <> @hex_archive_path)
       |> String.replace("[ELIXIR_VERSION]", elixir_version)
+      |> String.replace("[OTP_RELEASE]", otp_release)
       |> String.replace("[HEX_VERSION]", hex_version)
 
     # Unload the Hex module we loaded earlier to avoid conflicts when Hex is updated

lib/mix/lib/mix/tasks/local.rebar.ex

@@ -5,8 +5,8 @@
 defmodule Mix.Tasks.Local.Rebar do
   use Mix.Task
 
-  @rebar3_list_url "/installs/rebar3-1.x.csv"
-  @rebar3_escript_url "/installs/[ELIXIR_VERSION]/rebar3-[REBAR_VERSION]"
+  @rebar3_list_url "/installs/rebar.csv"
+  @rebar3_escript_url "/installs/[ELIXIR_VERSION]/rebar3-[REBAR_VERSION]-otp-[OTP_RELEASE]"
 
   @shortdoc "Installs Rebar locally"
 
@@ -114,13 +114,14 @@ defmodule Mix.Tasks.Local.Rebar do
     hex_url = Mix.Hex.url()
     list_url = hex_url <> list_url
 
-    {elixir_version, rebar_version, sha512} =
+    {elixir_version, rebar_version, sha512, otp_release} =
       Mix.Local.find_matching_versions!("Rebar", _version = nil, list_url)
 
     url =
       (hex_url <> escript_url)
       |> String.replace("[ELIXIR_VERSION]", elixir_version)
       |> String.replace("[REBAR_VERSION]", rebar_version)
+      |> String.replace("[OTP_RELEASE]", otp_release)
 
     install_from_path(manager, url, Keyword.put(opts, :sha512, sha512))
   end

lib/mix/test/mix/local_test.exs

@@ -8,17 +8,17 @@ defmodule Mix.LocalTest do
   use MixTest.Case
 
   @csv """
-  1.2.5,ABC,0.9.0
-  1.2.3,DEF,1.0.0
-  1.2.4,GHI,1.0.0
+  1.2.5,ABC,0.9.0,26
+  1.2.3,DEF,1.0.0,26
+  1.2.4,GHI,1.0.0,26
   """
 
   @tag :tmp_dir
   test "select correct versions from csv", %{tmp_dir: tmp_dir} do
     File.cd!(tmp_dir, fn ->
       File.write!("csv", @csv)
 
-      assert {"1.0.0", "1.2.4", "GHI"} =
+      assert {"1.0.0", "1.2.4", "GHI", "26"} =
                Mix.Local.find_matching_versions!("name", nil, "csv")
     end)
   end
@@ -28,10 +28,10 @@ defmodule Mix.LocalTest do
     File.cd!(tmp_dir, fn ->
       File.write!("csv", @csv)
 
-      assert {"0.9.0", "1.2.5", "ABC"} =
+      assert {"0.9.0", "1.2.5", "ABC", "26"} =
                Mix.Local.find_matching_versions!("name", "1.2.5", "csv")
 
-      assert {"1.0.0", "1.2.3", "DEF"} =
+      assert {"1.0.0", "1.2.3", "DEF", "26"} =
                Mix.Local.find_matching_versions!("name", "1.2.3", "csv")
 
       assert_raise Mix.Error, "Could not find a version of name matching: 1.3.0", fn ->

lib/mix/test/test_helper.exs

@@ -266,7 +266,8 @@ Enum.each(
 
 rebar3_source = System.get_env("REBAR3") || Path.expand("fixtures/rebar3", __DIR__)
 [major, minor | _] = String.split(System.version(), ".")
-rebar3_target = Path.join([mix, "elixir", "#{major}-#{minor}", "rebar3"])
+version_dir = "#{major}-#{minor}-otp-#{System.otp_release()}"
+rebar3_target = Path.join([mix, "elixir", version_dir, "rebar3"])
 File.mkdir_p!(Path.dirname(rebar3_target))
 File.cp!(rebar3_source, rebar3_target)