redmine: Add update script

The following steps need to be done before running the script:

  1. Copy Gemfile from new Redmine version to the Redmine folder in
     Nixpkgs
  2. Manually modify the database lines in Gemfile and just include the
     gems for the supported databases (diff the two files).

Signed-off-by: Felix Singer <felixsinger@posteo.net>

pkgs/applications/version-management/redmine/update.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env nix-shell
+#!nix-shell --pure -i bash -p cacert bundix
+
+# Do these steps before running this script:
+#   1. Copy Gemfile from new Redmine version to this folder
+#   2. Manually modify the database lines in Gemfile (diff the two files, it's obvious)
+
+pkg_dir="$(dirname "$0")"
+cd ${pkg_dir}
+
+for file in "gemset.nix" "Gemfile.lock"; do
+  if [ -f ${file} ]; then
+    rm ${file}
+  fi
+done
+
+bundix -l