Merge branch 'develop' into 'main'

release 0.1.0
2026-03-03 01:47:07 +00:00 · 2024-08-18 14:48:52 +00:00
parent 68ba3cfb38 2679134a5f
commit 834f3496eb
22 changed files with 1238 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/ical-filter-proxy
+/config.yaml
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -0,0 +1,19 @@
+---
+include:
+  - project: gitlab/includes  # private gitlab instance
+    file:
+      - docker.yml
+      - go.yml
+      - helm.yml
+variables:
+  CI_DOCKER_BUILD: "true"
+  CI_DOCKER_DHUB_REPO: "yungwood/ical-filter-proxy"
+
+go:build:
+  artifacts:
+    paths:
+      - ical-filter-proxy
+
+docker:build:
+  needs:
+    - go:build
--- a/37
+++ b/37
@@ -0,0 +1,37 @@
+FROM alpine:3.20.2
+
+# build args and defaults
+ARG BUILD_DATE="not-set"
+ARG REVISION="unknown"
+ARG VERSION="dev-build"
+
+# set some labels
+LABEL org.opencontainers.image.created="$BUILD_DATE" \
+      org.opencontainers.image.base.name="alpine:3.20.2" \
+      org.opencontainers.image.documentation="https://github.com/yungwood/ical-filter-proxy/tree/main/README.md" \
+      org.opencontainers.image.licenses="MIT" \
+      org.opencontainers.image.source="https://github.com/yungwood/ical-filter-proxy" \
+      org.opencontainers.image.revision="$REVISION" \
+      org.opencontainers.image.title="iCal Filter Proxy" \
+      org.opencontainers.image.description="iCal proxy with support for user-defined filtering rules" \
+      org.opencontainers.image.version="$VERSION"
+
+# install dependencies
+RUN apk --no-cache add gcompat=1.1.0-r4
+
+# create a group and user
+RUN addgroup -S icalfilterproxy && adduser -S -G icalfilterproxy icalfilterproxy
+
+# switch to app user
+USER icalfilterproxy
+
+# set working dir
+WORKDIR /app
+
+# copy binary
+COPY ical-filter-proxy /usr/bin/ical-filter-proxy
+
+# expose port, define entrypoint
+EXPOSE 8080/tcp
+ENTRYPOINT ["/usr/bin/ical-filter-proxy"]
+CMD ["-config", "/app/config.yaml"]
--- a/README.md
+++ b/README.md
@@ -0,0 +1,213 @@
+<!-- PROJECT LOGO -->
+<br />
+<div align="center">
+  <a href="https://github.com/yungwood/ical-filter-proxy">
+    <img src="logo.png" alt="Logo" width="120" height="120">
+  </a>
+
+  <h3 align="center">iCal Filter Proxy</h3>
+
+  <p align="center">
+    iCal proxy with support for user-defined filtering rules
+  </p>
+</div>
+
+
+## What's this thing?
+
+Do you have iCal feeds with a bunch of stuff you *don't* need? Do you want to modify events generated by your rostering system?
+
+iCal Filter Proxy is a simple service for proxying multiple iCal feeds while applying a list of filters to remove or modify events to suit your use case.
+
+### Features
+
+* Proxy multiple calendars
+* Define a list of filters per calendar
+* Match events using basic text and regex conditions
+* Remove or modify events as they are proxied
+
+
+### Built With
+
+* Go
+* [golang-ical](https://github.com/arran4/golang-ical)
+* [yaml.v3](https://github.com/go-yaml/yaml/tree/v3.0.1)
+* [DALL-E 2](https://openai.com/index/dall-e-2/) (app icon)
+
+
+## Setup
+
+### Docker
+
+Docker images are published to [Docker Hub](https://hub.docker.com/repository/docker/yungwood/ical-filter-proxy). You'll need a config file (see below) mounted into the container at `/app/config.yaml`.
+
+For example:
+
+```bash
+docker run -d \
+  --name=ical-filter-proxy \
+  -v config.yaml:/app/config.yaml \
+  -p 8080:8080/tcp \
+  --restart unless-stopped \
+  yungwood/ical-filter-proxy:latest
+```
+
+You can also adapt the included [`docker-compose.yaml`](./docker-compose.yaml) example.
+
+### Kubernetes
+
+You can deploy iCal Filter Proxy using the included helm chart from [`charts/ical-filter-proxy`](charts/ical-filter-proxy).
+
+### Build from source
+
+You can also build the app and container from source.
+
+```bash
+# clone this repo
+git clone git@github.com:yungwood/ical-filter-proxy.git
+cd ical-filter-proxy
+
+# build the ical-filter-proxy binary
+go build .
+
+# build container image
+docker build \
+  --build-arg BUILD_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
+  --build-arg REVISION=$(git rev-parse HEAD) \
+  --build-arg VERSION=$(git rev-parse --short HEAD) \
+  -t ical-filter-proxy:latest .
+```
+
+
+## Configuration
+
+Calendars and filters are defined in a yaml config file. By default this is `config.yaml` (use the `-config` switch to change this). The configuration must define at least one calendar for ical-filter-proxy to start.
+
+Example configuration (with comments):
+
+```yaml
+calendars:
+
+  # basic example
+  - name: example # used as slug in URL - e.g. ical-filter-proxy:8080/calendars/example/feed?token=changeme
+    token: "changeme" # token used to pull iCal feed - authentication is disabled when blank
+    feed_url: "https://my-upstream-calendar.url/feed.ics" # URL for the upstream iCal feed
+    filters: # optional - if no filters defined the upstream calendar is proxied as parsed
+      - description: "Remove an event based on a regex"
+        remove: true # events matching this filter will be removed
+        match: # optional - all events will match if no rules defined
+          summary: # match on event summary (title)
+            contains: "deleteme" # must contain 'deleteme'
+      - description: "Remove descriptions from all events"
+        transform: # optional
+          description: # modify event description
+            remove: true # replace with a blank string
+        
+  # example: removing noise from an Office 365 calendar
+  - name: outlook
+    token: "changeme"
+    feed_url: "https://outlook.office365.com/owa/calendar/.../reachcalendar.ics"
+    filters:
+      - description: "Remove canceled events" # canceled events remain with a 'Canceled:' prefix until removed
+        remove: true
+        match:
+          summary:
+            prefix: "Canceled: "
+      - description: "Remove optional events"
+        remove: true
+        match:
+          summary:
+            prefix: "[Optional]"
+      - description: "Remove public holidays"
+        remove: true
+        match:
+          summary:
+            regex_match: ".*[Pp]ublic [Hh]oliday.*"
+
+  # example: cleaning up an OpsGenie feed
+  - name: opsgenie
+    token: "changeme"
+    feed_url: "https://company.app.opsgenie.com/webapi/webcal/getRecentSchedule?webcalToken=..."
+    filters:
+      - description: "Keep oncall schedule events and fix names"
+        match:
+          summary:
+            contains: "schedule: oncall"
+        stop: true # stops processing any more filters
+        transform:
+          summary:
+            replace: "On-Call" # replace the event summary (title)
+      - description: "Remove all other events"
+        remove: true
+
+unsafe: false # optional - must be enabled if any calendars do not have a token
+```
+
+
+### Filters
+
+Calendar events are filtered using a similar concept to email filtering. A list of filters is defined for each calendar in the config.
+
+Each event parsed from `feed_url` is evaluated against the filters in sequence.
+
+* All `match` rules for a filter must be true to match an event
+* A filter with no `match` rules will *always* match
+* When a match is found:
+  * if `remove` is `true` the event is discarded
+  * `transform` rules are applied to the event
+  * if `stop` is `true` no more filters are processed
+* If no match is found the event is retained by default
+
+#### Match conditions
+
+Each filter can spcify match conditions against the following event properties:
+
+* `summary` (string value)
+* `location` (string value)
+* `description` (string value)
+
+These match conditions are available for a string value:
+
+* `contains` - property must contain this value
+* `prefix` - property must start with this value
+* `suffix` - property must end with this value
+* `regex_match` - property must match the given regular expression (an invalid regex will result in no matches)
+
+#### Transformations
+
+Transformations can be applied to the following event properties:
+
+* `summary` - string value
+* `location` - string value
+* `description` - string value
+
+The following transformations are available for strings:
+
+* `replace` - the property is replace with this value
+* `remove` - if `true` the property is set to a blank string
+
+
+## Roadmap to 1.0
+
+There are a few more features I would like to add before I call the project "stable" and release version 1.0.
+
+- [ ] Time based event conditions
+- [ ] Caching
+- [ ] Support for `ical_url_file` and `token_file` in config (vault secrets)
+- [ ] Prometheus metrics
+- [ ] Testing
+
+
+## Contributing
+
+If you have a suggestion that would make this better, please feel free to open an issue or send a pull request.
+
+
+## License
+
+This project is licensed under the MIT License. See the [LICENSE](./LICENSE) file for details.
+
+
+## Acknowledgments
+
+This project was inspired by [darkphnx/ical-filter-proxy](https://github.com/darkphnx/ical-filter-proxy). I needed more flexibility with filtering rules and the ability to modify event descriptions... plus I wanted an excuse to finally write something in Go.
--- a/calendar.go
+++ b/calendar.go
@@ -0,0 +1,259 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"log/slog"
+	"net/http"
+	"regexp"
+	"strings"
+
+	ics "github.com/arran4/golang-ical"
+)
+
+// All structs defined in this file are used to unmarshall yaml configuration and
+// provide helper functions that are used to fetch and filter events
+
+// CalendarConfig definition
+type CalendarConfig struct {
+	Name    string   `yaml:"name"`
+	Token   string   `yaml:"token"`
+	FeedURL string   `yaml:"feed_url"`
+	Filters []Filter `yaml:"filters"`
+}
+
+// Downloads iCal feed from the URL and applies filtering rules
+func (calendarConfig CalendarConfig) fetch() ([]byte, error) {
+
+	// get the iCal feed
+	slog.Debug("Fetching iCal feed", "url", calendarConfig.FeedURL)
+	resp, err := http.Get(calendarConfig.FeedURL)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	feedData, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	// parse calendar
+	cal, err := ics.ParseCalendar(strings.NewReader(string(feedData)))
+	if err != nil {
+		return nil, err
+	}
+
+	// process filters
+	if len(calendarConfig.Filters) > 0 {
+		slog.Debug("Processing filters", "calendar", calendarConfig.Name)
+		for _, event := range cal.Events() {
+			if !calendarConfig.ProcessEvent(event) {
+				cal.RemoveEvent(event.Id())
+			}
+		}
+		slog.Debug("Filter processing completed", "calendar", calendarConfig.Name)
+	} else {
+		slog.Debug("No filters to evaluate", "calendar", calendarConfig.Name)
+	}
+
+	// serialize output
+	var buf bytes.Buffer
+	err = cal.SerializeTo(&buf)
+	if err != nil {
+		return nil, err
+	}
+
+	// return
+	return buf.Bytes(), nil
+}
+
+// Evaluate the filters for a calendar against a given VEvent and
+// perform any transformations directly to the VEvent (pointer)
+// This function returns false if an event should be deleted
+func (calendarConfig CalendarConfig) ProcessEvent(event *ics.VEvent) bool {
+
+	// Get the Summary (the "title" of the event)
+	// In case we cannot parse the event summary it should get dropped
+	summary := event.GetProperty(ics.ComponentPropertySummary) // summary only for logging
+	if summary == nil {
+		return false
+	}
+
+	// Iterate through the Filter rules
+	for id, filter := range calendarConfig.Filters {
+
+		// Does the filter match the event?
+		if filter.matchesEvent(*event) {
+			slog.Debug("Filter match found", "rule_id", id, "filter_description", filter.Description, "event_summary", summary.Value)
+
+			// The event should get dropped if RemoveEvent is set
+			if filter.RemoveEvent {
+				slog.Debug("Event to be removed, no more rules will be processed", "action", "DELETE", "rule_id", id, "filter_description", filter.Description, "event_summary", summary.Value)
+				return false
+			}
+
+			// Apply transformation rules to event
+			filter.transformEvent(event)
+
+			// Check if we should stop processing rules
+			if filter.Stop {
+				slog.Debug("Stop option is set, no more rules will be processed", "rule_id", id, "filter_description", filter.Description, "event_summary", summary.Value)
+				return true
+			}
+		}
+	}
+
+	// Keep event by default if all Filter rules are processed
+	slog.Debug("Rule processing complete, event will be kept", "rule_id", nil, "event_summary", summary.Value)
+	return true
+
+}
+
+// Filter definition
+type Filter struct {
+	Description string              `yaml:"description"`
+	RemoveEvent bool                `yaml:"remove"`
+	Stop        bool                `yaml:"stop"`
+	Match       EventMatchRules     `yaml:"match"`
+	Transform   EventTransformRules `yaml:"transform"`
+}
+
+// Returns true if a VEvent matches the Filter conditions
+func (filter Filter) matchesEvent(event ics.VEvent) bool {
+
+	// If an event property is not defined golang-ical returns a nil pointer
+
+	// Get event Summary - only used for debug logging
+	eventSummary := event.GetProperty(ics.ComponentPropertySummary)
+	if eventSummary == nil {
+		slog.Warn("Unable to process event summary. Event will be dropped")
+		return false // never match if VEvent has no summary
+	}
+
+	// Check Summary filters against VEvent
+	if filter.Match.Summary.hasConditions() {
+		if !filter.Match.Summary.matchesString(eventSummary.Value) {
+			return false
+		}
+	}
+
+	// Check Description filters against VEvent
+	if filter.Match.Description.hasConditions() {
+		eventDescription := event.GetProperty(ics.ComponentPropertyDescription)
+		if eventDescription == nil {
+			slog.Debug("Event has no Description so cannot not match filter", "event_summary", eventSummary.Value, "filter", filter.Description)
+			return false // if VEvent has no description it cannot match filter
+		}
+		if !filter.Match.Description.matchesString(eventDescription.Value) {
+			slog.Debug("Event Description does not match filter conditions", "event_summary", eventSummary.Value, "filter", filter.Description)
+			return false // event doesn't match
+		}
+	}
+
+	// Check Description filters against VEvent
+	if filter.Match.Location.hasConditions() {
+		eventLocation := event.GetProperty(ics.ComponentPropertyLocation)
+		if eventLocation == nil {
+			slog.Warn("Event has no Location so cannot match filter", "event_summary", eventSummary.Value, "filter", filter.Description)
+			return false // if VEvent has no location it cannot match filter
+		}
+		if !filter.Match.Location.matchesString(eventLocation.Value) {
+			slog.Debug("Event Location does not match filter conditions", "event_summary", eventSummary.Value, "filter", filter.Description)
+			return false // event doesn't match
+
+		}
+	}
+
+	// VEvent must match if we get here
+	slog.Debug("Event matches filter conditions", "event_summary", eventSummary.Value, "filter", filter.Description)
+	return true
+}
+
+// Applies filter transformations to a VEvent pointer
+func (filter Filter) transformEvent(event *ics.VEvent) {
+
+	// Summary transformations
+	if filter.Transform.Summary.Remove {
+		event.SetSummary("")
+	} else if filter.Transform.Summary.Replace != "" {
+		event.SetSummary(filter.Transform.Summary.Replace)
+	}
+
+	// Description transformations
+	if filter.Transform.Description.Remove {
+		event.SetDescription("")
+	} else if filter.Transform.Description.Replace != "" {
+		event.SetDescription(filter.Transform.Description.Replace)
+	}
+}
+
+// EventMatchRules contains VEvent properties that user can match against
+type EventMatchRules struct {
+	Summary     StringMatchRule `yaml:"summary"`
+	Description StringMatchRule `yaml:"description"`
+	Location    StringMatchRule `yaml:"location"`
+}
+
+// StringMatchRule defines match rules for VEvent properties with string values
+type StringMatchRule struct {
+	Contains   string `yaml:"contains"`
+	Prefix     string `yaml:"prefix"`
+	Suffix     string `yaml:"suffix"`
+	RegexMatch string `yaml:"regex"`
+}
+
+// Returns true if StringMatchRule has any conditions
+func (smr StringMatchRule) hasConditions() bool {
+	return smr.Contains != "" ||
+		smr.Prefix != "" ||
+		smr.Suffix != "" ||
+		smr.RegexMatch != ""
+}
+
+// Returns true if a given string (data) matches ALL StringMatchRule conditions
+func (smr StringMatchRule) matchesString(data string) bool {
+	// check contains if set
+	if smr.Contains != "" {
+		if data == "" || !strings.Contains(data, smr.Contains) {
+			return false
+		}
+	}
+	// check prefix if set
+	if smr.Prefix != "" {
+		if data == "" || !strings.HasPrefix(data, smr.Prefix) {
+			return false
+		}
+	}
+	// check suffix if set
+	if smr.Suffix != "" {
+		if data == "" || !strings.HasSuffix(data, smr.Suffix) {
+			return false
+		}
+	}
+	// check regex match if set
+	if smr.RegexMatch != "" {
+		match, err := regexp.MatchString(data, smr.RegexMatch)
+		if err != nil {
+			slog.Warn("error processing regex rule", "value", smr.RegexMatch)
+			return false // regex error is considered a failure to match
+		}
+		if !match {
+			return false // regex didn't match
+		}
+	}
+	return true
+}
+
+// EventTransformRules contains VEvent properties that user can modify
+type EventTransformRules struct {
+	Summary     StringTransformRule `yaml:"summary"`
+	Description StringTransformRule `yaml:"description"`
+	Location    StringTransformRule `yaml:"location"`
+}
+
+// StringTransformRule defines changes for VEvent properties with string values
+type StringTransformRule struct {
+	Replace string `yaml:"replace"`
+	Remove  bool   `yaml:"remove"`
+}
--- a/charts/ical-filter-proxy/.helmignore
+++ b/charts/ical-filter-proxy/.helmignore
@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
--- a/charts/ical-filter-proxy/Chart.yaml
+++ b/charts/ical-filter-proxy/Chart.yaml
@@ -0,0 +1,8 @@
+apiVersion: v2
+name: ical-filter-proxy
+description: iCal proxy with support for user-defined filtering rules
+type: application
+version: 0.1.0
+appVersion: "0.1.0"
+maintainers:
+  - name: Yung Wood
--- a/charts/ical-filter-proxy/templates/NOTES.txt
+++ b/charts/ical-filter-proxy/templates/NOTES.txt
@@ -0,0 +1,22 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "ical-filter-proxy.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch its status by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "ical-filter-proxy.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "ical-filter-proxy.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "ical-filter-proxy.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}
--- a/charts/ical-filter-proxy/templates/_helpers.tpl
+++ b/charts/ical-filter-proxy/templates/_helpers.tpl
@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "ical-filter-proxy.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "ical-filter-proxy.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "ical-filter-proxy.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "ical-filter-proxy.labels" -}}
+helm.sh/chart: {{ include "ical-filter-proxy.chart" . }}
+{{ include "ical-filter-proxy.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "ical-filter-proxy.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "ical-filter-proxy.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "ical-filter-proxy.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "ical-filter-proxy.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
--- a/charts/ical-filter-proxy/templates/config.yaml
+++ b/charts/ical-filter-proxy/templates/config.yaml
@@ -0,0 +1,15 @@
+{{- if .Values.config.enabled -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "ical-filter-proxy.fullname" . }}-config
+  labels:
+    {{- include "ical-filter-proxy.labels" . | nindent 4 }}
+data:
+  config.yaml: |
+    {{- if .Values.config.insecure }}
+    insecure: true
+    {{- end }}
+    calendars:
+{{ .Values.config.calendars | toYaml | indent 6 }}
+{{- end }}
--- a/charts/ical-filter-proxy/templates/deployment.yaml
+++ b/charts/ical-filter-proxy/templates/deployment.yaml
@@ -0,0 +1,79 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "ical-filter-proxy.fullname" . }}
+  labels:
+    {{- include "ical-filter-proxy.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "ical-filter-proxy.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "ical-filter-proxy.labels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "ical-filter-proxy.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          args: {{ .Values.args }}
+          ports:
+            - name: http
+              containerPort: {{ .Values.service.port }}
+              protocol: TCP
+          livenessProbe:
+            {{- toYaml .Values.livenessProbe | nindent 12 }}
+          readinessProbe:
+            {{- toYaml .Values.readinessProbe | nindent 12 }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          volumeMounts:
+          {{- if .Values.config.enabled }}
+            - name: config
+              mountPath: /app/config.yaml
+              subPath: config.yaml
+          {{- end }}
+          {{- with .Values.volumeMounts }}
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+      volumes:
+      {{- if .Values.config.enabled }}
+        - name: config
+          configMap:
+            name: {{ include "ical-filter-proxy.fullname" . }}-config
+      {{- end }}
+      {{- with .Values.volumes }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
--- a/charts/ical-filter-proxy/templates/hpa.yaml
+++ b/charts/ical-filter-proxy/templates/hpa.yaml
@@ -0,0 +1,32 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "ical-filter-proxy.fullname" . }}
+  labels:
+    {{- include "ical-filter-proxy.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "ical-filter-proxy.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}
--- a/charts/ical-filter-proxy/templates/ingress.yaml
+++ b/charts/ical-filter-proxy/templates/ingress.yaml
@@ -0,0 +1,61 @@
+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "ical-filter-proxy.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if and .Values.ingress.className (not (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion)) }}
+  {{- if not (hasKey .Values.ingress.annotations "kubernetes.io/ingress.class") }}
+  {{- $_ := set .Values.ingress.annotations "kubernetes.io/ingress.class" .Values.ingress.className}}
+  {{- end }}
+{{- end }}
+{{- if semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1
+{{- else if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "ical-filter-proxy.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if and .Values.ingress.className (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion) }}
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- end }}
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            {{- if and .pathType (semverCompare ">=1.18-0" $.Capabilities.KubeVersion.GitVersion) }}
+            pathType: {{ .pathType }}
+            {{- end }}
+            backend:
+              {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
+              service:
+                name: {{ $fullName }}
+                port:
+                  number: {{ $svcPort }}
+              {{- else }}
+              serviceName: {{ $fullName }}
+              servicePort: {{ $svcPort }}
+              {{- end }}
+          {{- end }}
+    {{- end }}
+{{- end }}
--- a/charts/ical-filter-proxy/templates/service.yaml
+++ b/charts/ical-filter-proxy/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "ical-filter-proxy.fullname" . }}
+  labels:
+    {{- include "ical-filter-proxy.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "ical-filter-proxy.selectorLabels" . | nindent 4 }}
--- a/charts/ical-filter-proxy/templates/serviceaccount.yaml
+++ b/charts/ical-filter-proxy/templates/serviceaccount.yaml
@@ -0,0 +1,13 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "ical-filter-proxy.serviceAccountName" . }}
+  labels:
+    {{- include "ical-filter-proxy.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+automountServiceAccountToken: {{ .Values.serviceAccount.automount }}
+{{- end }}
--- a/charts/ical-filter-proxy/values.yaml
+++ b/charts/ical-filter-proxy/values.yaml
@@ -0,0 +1,119 @@
+replicaCount: 1
+
+image:
+  repository: yungwood/ical-filter-proxy
+  pullPolicy: IfNotPresent
+  tag: "" # defaults to chart appVersion
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+args: []
+
+config:
+  enabled: false  # enable to generate config from values (example below)
+  # calendars:
+  #   - name: outlook
+  #     token: "changeme"
+  #     feed_url: "https://outlook.office365.com/owa/calendar/.../reachcalendar.ics"
+  #     filters:
+  #       - description: "Remove cancelled events"
+  #         remove: true
+  #         match:
+  #           summary:
+  #             prefix: "Canceled: "
+  #       - description: "Remove optional events"
+  #         remove: true
+  #         match:
+  #           summary:
+  #             prefix: "[Optional]"
+  #       - description: "Remove public holidays"
+  #         remove: true
+  #         match:
+  #           summary:
+  #             regex_match: ".*[Pp]ublic [Hh]oliday.*"
+  # insecure: false
+
+serviceAccount:
+  create: true
+  automount: true
+  annotations: {}
+  name: ""
+
+podAnnotations: {}
+podLabels: {}
+
+podSecurityContext: {}
+  # fsGroup: 2000
+
+securityContext:
+  capabilities:
+    drop:
+    - ALL
+  allowPrivilegeEscalation: false
+  readOnlyRootFilesystem: true
+  runAsNonRoot: true
+  runAsUser: 1000
+  runAsGroup: 3000
+
+service:
+  type: ClusterIP
+  port: 8080
+
+ingress:
+  enabled: false
+  className: ""
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  hosts:
+    - host: ical-filter-proxy.local
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+  tls: []
+  #  - secretName: ical-filter-proxy-tls
+  #    hosts:
+  #      - ical-filter-proxy.local
+
+resources: {}
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+  # requests:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+livenessProbe:
+  httpGet:
+    path: /liveness
+    port: http
+readinessProbe:
+  httpGet:
+    path: /readiness
+    port: http
+
+autoscaling:
+  enabled: false
+  minReplicas: 1
+  maxReplicas: 100
+  targetCPUUtilizationPercentage: 80
+  # targetMemoryUtilizationPercentage: 80
+
+volumes: []
+# - name: foo
+#   secret:
+#     secretName: mysecret
+#     optional: false
+
+volumeMounts: []
+# - name: foo
+#   mountPath: "/etc/foo"
+#   readOnly: true
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -0,0 +1,26 @@
+---
+services:
+  ical-filter-proxy:
+    image: yungwood/ical-filter-proxy:latest
+    container_name: ical-filter-proxy
+    # # specify additional command arguments
+    # command: --debug
+    ports:
+      - "8080:8080"
+    volumes:
+      - ./config.yaml:/app/config.yaml
+    restart: always
+
+## the below example might be used with traefik docker provider
+## https://doc.traefik.io/traefik/providers/docker/
+#     labels:
+#       traefik.enable: true
+#       traefik.http.routers.ical.rule: "Host(`ical.mydomain.com`)"
+#       traefik.http.routers.ical.entrypoints: web
+#       traefik.http.services.ical.loadbalancer.server.port: 8080
+#     networks: 
+#       - traefik
+# networks:
+#   traefik:
+#     name: traefik
+#     external: true
--- a/go.mod
+++ b/go.mod
@@ -0,0 +1,18 @@
+module github.com/yungwood/ical-filter-proxy
+
+go 1.22.5
+
+require (
+	github.com/arran4/golang-ical v0.3.1
+	github.com/gookit/color v1.5.4 // indirect
+	github.com/gookit/goutil v0.6.15 // indirect
+	github.com/gookit/gsr v0.1.0 // indirect
+	github.com/gookit/slog v0.5.6 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1
+)
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,29 @@
+github.com/arran4/golang-ical v0.3.1 h1:v13B3eQZ9VDHTAvT6M11vVzxYgcYmjyPBE2eAZl3VZk=
+github.com/arran4/golang-ical v0.3.1/go.mod h1:LZWxF8ZIu/sjBVUCV0udiVPrQAgq3V0aa0RfbO99Qkk=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/gookit/color v1.5.4/go.mod h1:pZJOeOS8DM43rXbp4AZo1n9zCU2qjpcRko0b6/QJi9w=
+github.com/gookit/goutil v0.6.15/go.mod h1:qdKdYEHQdEtyH+4fNdQNZfJHhI0jUZzHxQVAV3DaMDY=
+github.com/gookit/gsr v0.1.0/go.mod h1:7wv4Y4WCnil8+DlDYHBjidzrEzfHhXEoFjEA0pPPWpI=
+github.com/gookit/slog v0.5.6/go.mod h1:RfIwzoaQ8wZbKdcqG7+3EzbkMqcp2TUn3mcaSZAw2EQ=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
+github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
+golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/logo.png
+++ b/logo.png
--- a/main.go
+++ b/main.go
@@ -0,0 +1,182 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+var Version = "development"
+
+// this struct used to parse config.yaml
+type Config struct {
+	Calendars   []CalendarConfig `yaml:"calendars"`
+	AllowUnsafe bool             `yaml:"unsafe"`
+}
+
+// This function loads the configuration file and does some basic validation
+// Returns false if the config is not valid or an error occurs
+func (config *Config) LoadConfig(file string) bool {
+	data, err := os.ReadFile(file)
+	if err != nil {
+		slog.Error("Unable to open config file! You can use -config to specify a different file", "file", file)
+		return false
+	}
+	err = yaml.Unmarshal(data, &config)
+	if err != nil {
+		slog.Error("Error while unmarshalling yaml! Check config file is valid", "file", file)
+		return false
+	}
+
+	// ensure calendars exist
+	if len(config.Calendars) == 0 {
+		slog.Error("No calendars found! Configuration should define at least one calendar")
+		return false
+	}
+
+	// validate calendar configs
+	for _, calendarConfig := range config.Calendars {
+
+		// check if url seems valid
+		if !strings.HasPrefix(calendarConfig.FeedURL, "http://") && !strings.HasPrefix(calendarConfig.FeedURL, "https://") {
+			slog.Debug("Calendar URL must begin with http:// or https://", "calendar", calendarConfig.Name, "feed_url", len(calendarConfig.Filters))
+			return false
+		}
+
+		// Check to see if auth is disabled (token not set)
+		// If so print a warning message and make sure unsafe is enabled in config
+		if len(calendarConfig.Token) == 0 {
+			slog.Warn("Calendar has no token set. Authentication will be disabled", "calendar", calendarConfig.Name)
+			if !config.AllowUnsafe {
+				slog.Error("Calendar cannot have authentication disabled without unsafe optionenabled in the configuration", "calendar", calendarConfig.Name)
+				return false
+			}
+		}
+
+		// Print a warning if the calendar has no filters
+		if len(calendarConfig.Filters) == 0 {
+			slog.Warn("Calendar has no filters and will be proxy-only", "calendar", calendarConfig.Name)
+			break
+		}
+
+	}
+
+	return true // config is parsed successfully
+
+}
+
+func main() {
+
+	// command-line args
+	var (
+		configFile     string
+		debugLogging   bool
+		jsonLogging    bool
+		listenPort     int
+		validateConfig bool
+		printVersion   bool
+	)
+	flag.StringVar(&configFile, "config", "config.yaml", "config file")
+	flag.BoolVar(&debugLogging, "debug", false, "enable debug logging")
+	flag.BoolVar(&printVersion, "version", false, "print version and exit")
+	flag.BoolVar(&jsonLogging, "json", false, "output logging in JSON format")
+	flag.IntVar(&listenPort, "port", 8080, "listening port for api")
+	flag.BoolVar(&validateConfig, "validate", false, "validate config and exit")
+	flag.Parse()
+
+	// print version and exit
+	if printVersion {
+		fmt.Println("version:", Version)
+		os.Exit(0)
+	}
+
+	// setup logging options
+	loggingLevel := slog.LevelInfo // default loglevel
+	if debugLogging {
+		loggingLevel = slog.LevelDebug // debug logging enabled
+	}
+	opts := &slog.HandlerOptions{
+		Level: loggingLevel,
+	}
+
+	// create json or text logger based on args
+	var logger *slog.Logger
+	if jsonLogging {
+		logger = slog.New(slog.NewJSONHandler(os.Stdout, opts))
+	} else {
+		logger = slog.New(slog.NewTextHandler(os.Stdout, opts))
+	}
+	slog.SetDefault(logger)
+
+	// load configuration
+	slog.Debug("reading config", "configFile", configFile)
+	var config Config
+	if !config.LoadConfig(configFile) {
+		os.Exit(1) // fail if config is not valid
+	}
+	slog.Debug("loaded config")
+
+	// print a message and exit if validate arg was specified
+	if validateConfig {
+		slog.Info("configuration was validated successfully")
+		os.Exit(0)
+	}
+
+	// iterate through calendars in the config and setup a handler for each
+	// todo: consider refactor to route requests dynamically?
+	for _, calendarConfig := range config.Calendars {
+
+		// configure HTTP endpoint
+		httpPath := "/calendars/" + calendarConfig.Name + "/feed"
+		slog.Debug("Configuring endpoint", "calendar", calendarConfig.Name, "http_path", httpPath)
+		http.HandleFunc(httpPath, func(w http.ResponseWriter, r *http.Request) {
+
+			slog.Debug("Received request for calendar", "http_path", httpPath, "calendar", calendarConfig.Name, "client_ip", r.RemoteAddr)
+
+			// validate token
+			token := r.URL.Query().Get("token")
+			if token != calendarConfig.Token {
+				slog.Warn("Unauthorized access attempt", "client_ip", r.RemoteAddr)
+				http.Error(w, "Unauthorized", http.StatusUnauthorized)
+				return
+			}
+
+			// fetch and filter upstream calendar
+			feed, err := calendarConfig.fetch()
+			if err != nil {
+				slog.Error("Error fetching and filtering feed", "error", err)
+				http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+				return
+			}
+
+			// return calendar
+			w.Header().Set("Content-Type", "text/calendar")
+			_, err = w.Write(feed)
+			if err != nil {
+				slog.Error("Error writing response", "error", err)
+				http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+				return
+			}
+
+			slog.Info("Calendar request processed", "http_path", httpPath, "calendar", calendarConfig.Name, "client_ip", r.RemoteAddr)
+		})
+
+	}
+
+	// add a readiness and liveness check endpoint (return blank 200 OK response)
+	http.HandleFunc("/liveness", func(w http.ResponseWriter, r *http.Request) {})
+	http.HandleFunc("/readiness", func(w http.ResponseWriter, r *http.Request) {})
+
+	// start the webserver
+	slog.Info("Starting web server", "port", listenPort)
+	if err := http.ListenAndServe(":"+strconv.Itoa(listenPort), nil); err != nil {
+		slog.Error("Error starting web server", "error", err)
+	}
+
+}
--- a/renovate.json
+++ b/renovate.json
@@ -0,0 +1,4 @@
+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "baseBranches": ["develop"]
+}