Make possible to override the branch name via a env variable

This is useful for the CI builds because they have a detached HEAD or
for emulating a feature that is availible only on a particular branch
(e.g pleroma_ctl downloads CI artifacts only for develop and master)

1 files changed, 1 insertions, 0 deletions

diff --git a/mix.exs b/mix.exs
index 781560a0a..ac25b7266 100644
--- a/mix.exs
+++ b/mix.exs
@@ -207,6 +207,7 @@ defmodule Pleroma.Mixfile do
 
     branch_name =
       with {branch_name, 0} <- System.cmd("git", ["rev-parse", "--abbrev-ref", "HEAD"]),
+           branch_name <- System.get_env("PLEROMA_BUILD_BRANCH") || branch_name,
            true <- branch_name != "master" do
         branch_name =
           String.trim(branch_name)