Export branch name to container

.github/workflows/ci.yml

@@ -87,6 +87,7 @@ jobs:
 
           VER="$(git describe --tags 2>/dev/null)"
           echo "version=${VER}" >> "$GITHUB_OUTPUT"
+          echo "branch=${REF}" >> "$GITHUB_OUTPUT"
 
           echo 'tags<<EOF' >> "$GITHUB_OUTPUT"
           if [[ "$REF" == "main" ]]; then
@@ -105,6 +106,7 @@ jobs:
           platforms: linux/amd64
           build-args: |
             VERSION=${{ steps.info.outputs.version }}
+            BRANCH=${{ steps.info.outputs.branch }}
 
   publish-image:
     name: Publish Image

.gitignore

@@ -29,6 +29,7 @@ vendor/bundle
 
 Procfile.local
 VERSION
+BRANCH
 
 .rubocop-https*
 .env*

Dockerfile

@@ -3,7 +3,7 @@ FROM ruby:3.2.2-bullseye AS base
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN apt-get update \
   && apt-get install -y --no-install-recommends \
-  software-properties-common dirmngr apt-transport-https \
+      software-properties-common dirmngr apt-transport-https \
   && (curl -sL https://deb.nodesource.com/setup_20.x | bash -) \
   && rm -rf /var/lib/apt/lists/*
 
@@ -43,8 +43,10 @@ COPY ./docker/wait-for.sh /docker-entrypoint.sh
 COPY --chown=postal . .
 
 # Export the version
-ARG VERSION=unspecified
-RUN echo $VERSION > VERSION
+ARG VERSION=null
+ARG BRANCH=null
+RUN echo $VERSION > VERSION \
+  && echo $BRANCH > BRANCH
 
 # Set paths for when running in a container
 ENV POSTAL_CONFIG_FILE_PATH=/config/postal.yml

app/helpers/application_helper.rb

@@ -100,4 +100,11 @@ def endpoint_options_for_select(server, selected_value = nil, options = {})
     end.html_safe
   end
 
+  def postal_version_string
+    string = Postal.version
+    string += " (#{Postal.branch})" if Postal.branch &&
+                                       Postal.branch != "main"
+    string
+  end
+
 end

app/views/layouts/application.html.haml

@@ -55,6 +55,8 @@
         %footer.siteContent__footer
           %ul.footer__links
             %li.footer__name
-              Powered by #{link_to "Postal", "https://postalserver.io", target: '_blank'} #{Postal.version}.
+              Powered by
+              #{link_to "Postal", "https://postalserver.io", target: '_blank'}
+              #{postal_version_string}
             %li= link_to "Documentation", "https://docs.postalserver.io", target: '_blank'
             %li= link_to "Ask for help", "https://discussions.postalserver.io", target: '_blank'

lib/postal/config.rb

@@ -153,6 +153,18 @@ def change_database_connection_pool_size(new_size)
       ActiveRecord::Base.establish_connection(config.merge(pool: new_size))
     end
 
+    # Return the branch name which created this release
+    #
+    # @return [String, nil]
+    def branch
+      return @branch if instance_variable_defined?("@branch")
+
+      @branch = begin
+        path = Rails.root.join("BRANCH")
+        File.read(path).strip if File.exist?(path)
+      end
+    end
+
   end
 
   Config = initialize_config