Configure Gitea commit signing with SSH key

site-cookbooks/kosmos_gitea/recipes/default.rb

@@ -19,6 +19,17 @@ jwt_secret                = gitea_data_bag_item["jwt_secret"]
 internal_token            = gitea_data_bag_item["internal_token"]
 secret_key                = gitea_data_bag_item["secret_key"]
 
+apt_repository "git-core-ppa" do
+  uri "http://ppa.launchpad.net/git-core/ppa/ubuntu"
+  components ["main"]
+  key "E1DF1F24"
+  action :add
+  only_if do
+    node['platform'] == 'ubuntu' &&
+      Gem::Version.new(node['platform_version']) < Gem::Version.new('22.04')
+  end
+end
+
 package "git"
 
 user "git" do
@@ -26,6 +37,13 @@ user "git" do
   home "/home/git"
 end
 
+directory "/home/git/.ssh" do
+  owner "git"
+  group "git"
+  mode "0700"
+  recursive true
+end
+
 directory working_directory do
   owner "git"
   group "git"
@@ -100,6 +118,16 @@ config_variables = {
   s3_bucket: gitea_data_bag_item["s3_bucket"]
 }
 
+bash "Generate git ed25519 keypair" do
+  user "git"
+  group "git"
+  cwd git_home_directory
+  code <<-EOH
+    ssh-keygen -t ed25519 -f #{git_home_directory}/.ssh/id_ed25519
+  EOH
+  creates "#{git_home_directory}/.ssh/id_ed25519"
+end
+
 template "#{config_directory}/app.ini" do
   source "app.ini.erb"
   owner "git"

site-cookbooks/kosmos_gitea/templates/default/app.ini.erb

@@ -30,6 +30,16 @@ MAX_OPEN_CONNS = 20
 ROOT = <%= @repository_root_directory %>
 DISABLE_DOWNLOAD_SOURCE_ARCHIVES = true
 
+[repository.signing]
+SIGNING_KEY = <%= @git_home_directory %>/.ssh/id_ed25519.pub
+SIGNING_NAME = Gitea
+SIGNING_EMAIL = git@<%= @domain %>
+SIGNING_FORMAT = ssh
+INITIAL_COMMIT = always
+CRUD_ACTIONS = always
+WIKI = always
+MERGES = always
+
 # [indexer]
 # ISSUE_INDEXER_PATH = /data/gitea/indexers/issues.bleve