OAuth2 configuration options (#123)

I opened up the OAuth2 authentication option. I needed this feature, and it is available in the gitea cli. So I opened it up for configuration through this pull request.

Hope it can help others.

Co-authored-by: Marc Went <marc.went+git@redkubes.com>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/123
Reviewed-by: luhahn <luhahn@noreply.gitea.io>
Reviewed-by: lafriks <lafriks@noreply.gitea.io>
Co-authored-by: Dunky13 <dunky13@noreply.gitea.io>
Co-committed-by: Dunky13 <dunky13@noreply.gitea.io>

templates/_helpers.tpl

@@ -107,4 +107,12 @@ app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end -}}
 {{- end -}}
 {{- end -}}
+{{- end -}}
+
+{{- define "gitea.oauth_settings" -}}
+{{- range $key, $val := .Values.gitea.oauth -}}
+{{- if ne $key "enabled" -}}
+{{- printf "--%s %s " ($key | kebabcase) ($val | quote) -}}
+{{- end -}}
+{{- end -}}
 {{- end -}}

templates/gitea/init.yaml

@@ -40,4 +40,14 @@ stringData:
       {{- include "gitea.ldap_settings" . | nindent 6 }} \
     ) \
     {{- end }}
+    {{- if .Values.gitea.oauth.enabled }}
+    gitea admin auth add-oauth \
+    {{- include "gitea.oauth_settings" . | nindent 6 }} \
+    || \
+    ( \
+      export GITEA_AUTH_ID=$(gitea admin auth list | grep {{ .Values.gitea.oauth.name | quote }} | awk -F " "  "{print \$1}"); \
+      gitea admin auth update-oauth --id ${GITEA_AUTH_ID} \
+      {{- include "gitea.oauth_settings" . | nindent 6 }} \
+    ) \
+    {{- end }}
     '

templates/gitea/statefulset.yaml

@@ -15,6 +15,7 @@ spec:
       annotations:
         checksum/config: {{ include (print $.Template.BasePath "/gitea/config.yaml") . | sha256sum }}
         checksum/ldap: {{ include "gitea.ldap_settings" . | sha256sum }}
+        checksum/oauth: {{ include "gitea.oauth_settings" . | sha256sum }}
         {{- with .Values.gitea.podAnnotations }}
         {{- toYaml . | nindent 8 }}
         {{- end }}