Merge pull request #120 from stuttgart-things/feat/105-config-driven-stream-routing

feat: config-driven stream routing with allowlist and matchers

Author: patrick-hermann-sva

README.md

@@ -276,6 +276,46 @@ helmfile apply -f \
 
 </details>
 
+## Stream routing
+
+By default omni-pitcher writes every message to a single Redis stream (`REDIS_STREAM`, default `messages`). Set the `ROUTES_CONFIG` env var to a YAML file path to route messages to different streams based on which endpoint received them or what they contain.
+
+```yaml
+# routes.yaml
+streams:                # allowlist of valid destination streams
+  - messages
+  - github-events
+  - grafana-alerts
+  - releases
+default_stream: messages  # fallback when no rule matches; must be in `streams`
+routes:                   # ordered; first match wins, AND inside a rule
+  - match: { endpoint: /pitch/github }
+    stream: github-events
+  - match: { system: grafana }
+    stream: grafana-alerts
+  - match: { tag_contains: release }
+    stream: releases
+```
+
+Available matchers (all substring, no regex):
+
+| Matcher | Matches against |
+|---|---|
+| `endpoint` | Request URL path (e.g. `/pitch/github`) |
+| `system` | `Message.System` |
+| `author` | `Message.Author` |
+| `tag_contains` | `Message.Tags` |
+| `title_contains` | `Message.Title` (list — any match wins) |
+
+Rules are evaluated top-to-bottom; **first match wins**. Inside a rule, all declared matchers must match (**AND**). If no rule matches, the message goes to `default_stream`.
+
+Misconfiguration fails startup. Specifically:
+- `streams` must be non-empty and unique
+- `default_stream` and every `routes[*].stream` must be in `streams`
+- every rule must declare at least one matcher
+
+When `ROUTES_CONFIG` is unset, the legacy single-stream behavior is preserved (everything goes to `REDIS_STREAM`). See [`examples/routes.yaml`](examples/routes.yaml) for a full example.
+
 ## PR preview environments
 
 Every open PR against `main` gets an ephemeral preview environment on `homerun2-dev` — omni-pitcher + redis-stack in an isolated namespace, reachable end-to-end so reviewers can pitch test events against the PR build.

docs/api-usage.md

@@ -170,7 +170,8 @@ Returns `200 OK` when the service is running.
 | `PORT`          | `8080`                                       | HTTP server port         |
 | `REDIS_ADDR`    | `redis-stack.homerun2.svc.cluster.local`     | Redis server address     |
 | `REDIS_PORT`    | `6379`                                       | Redis server port        |
-| `REDIS_STREAM`  | `messages`                                   | Redis stream name        |
+| `REDIS_STREAM`  | `messages`                                   | Redis stream name (used when `ROUTES_CONFIG` is unset) |
+| `ROUTES_CONFIG` | (empty)                                      | Path to YAML stream-routing config; see [Stream routing](../README.md#stream-routing) in the README |
 | `REDIS_SEARCH_INDEX` | (empty)                                 | RediSearch index name (enables dual-write) |
 | `GITHUB_WEBHOOK_SECRET` | (empty)                              | HMAC secret for GitHub webhook validation |
 | `AUTH_TOKEN`    | (required)                                   | Bearer token for auth    |

examples/routes.yaml

@@ -0,0 +1,38 @@
+# Example routing config consumed by omni-pitcher when ROUTES_CONFIG is set.
+# See README.md "Stream routing" for the full schema and semantics.
+
+# Allowlist of valid destination streams. Any route or default targeting a
+# stream not in this list fails startup.
+streams:
+  - messages
+  - github-events
+  - grafana-alerts
+  - releases
+
+# Fallback stream when no rule matches. Must be in `streams`.
+default_stream: messages
+
+# Ordered rule list — first match wins. All matchers within a single rule
+# must match (AND semantics). All matchers are substring (no regex).
+routes:
+  # GitHub webhook traffic — routed by the URL path the request landed on.
+  - match:
+      endpoint: /pitch/github
+    stream: github-events
+
+  # Grafana alerts — webhook payload sets Message.System = receiver name.
+  - match:
+      system: grafana
+    stream: grafana-alerts
+
+  # Release announcements — any tag containing "release".
+  - match:
+      tag_contains: release
+    stream: releases
+
+  # Combined matchers (AND) — only push events that mention errors land here.
+  # Falls through to default_stream if any matcher misses.
+  - match:
+      endpoint: /pitch/github
+      title_contains: [error, failure]
+    stream: grafana-alerts

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	github.com/redis/go-redis/v9 v9.19.0
 	github.com/stuttgart-things/homerun-library/v3 v3.1.0
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
@@ -86,7 +87,6 @@ require (
 	github.com/coreos/go-semver v0.3.1 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.6 // indirect
 	github.com/cyphar/filepath-securejoin v0.3.6 // indirect
-	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/envoyproxy/go-control-plane v0.13.1 // indirect
@@ -227,6 +227,5 @@ require (
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )

go.sum

@@ -10,14 +10,8 @@ c2sp.org/CCTV/age v0.0.0-20251208015420-e9274a7bdbfd h1:ZLsPO6WdZ5zatV4UfVpr7oAw
 c2sp.org/CCTV/age v0.0.0-20251208015420-e9274a7bdbfd/go.mod h1:SrHC2C7r5GkDk8R+NFVzYy/sdj0Ypg9htaPXQq5Cqeo=
 cel.dev/expr v0.19.1 h1:NciYrtDRIR0lNCnH1LFJegdjspNx9fI59O7TWcua/W4=
 cel.dev/expr v0.19.1/go.mod h1:MrpN08Q+lEBs+bGYdLxxHkZoUSsCp0nSKTs0nTymJgw=
-charm.land/bubbletea/v2 v2.0.2 h1:4CRtRnuZOdFDTWSff9r8QFt/9+z6Emubz3aDMnf/dx0=
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@@ -175,18 +169,10 @@ github.com/census-instrumentation/opencensus-proto v0.4.1/go.mod h1:4T9NM4+4Vw91
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-github.com/charmbracelet/ultraviolet v0.0.0-20260205113103-524a6607adb8 h1:eyFRbAmexyt43hVfeyBofiGSEmJ7krjLOYt/9CF5NKA=
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-github.com/charmbracelet/x/ansi v0.11.6 h1:GhV21SiDz/45W9AnV2R61xZMRri5NlLnl6CVF7ihZW8=
-github.com/charmbracelet/x/ansi v0.11.6/go.mod h1:2JNYLgQUsyqaiLovhU2Rv/pb8r6ydXKS3NIttu3VGZQ=
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@@ -225,7 +211,6 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/docker/cli v27.4.1+incompatible h1:VzPiUlRJ/xh+otB75gva3r05isHMo5wXDfPRi5/b4hI=
 github.com/docker/cli v27.4.1+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
@@ -359,8 +344,6 @@ github.com/imdario/mergo v0.3.13 h1:lFzP57bqS/wsqKssCGmtLAb8A0wKjLGrve2q3PPVcBk=
 github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
-github.com/jedib0t/go-pretty/v6 v6.7.8 h1:BVYrDy5DPBA3Qn9ICT+PokP9cvCv1KaHv2i+Hc8sr5o=
-github.com/jedib0t/go-pretty/v6 v6.7.8/go.mod h1:YwC5CE4fJ1HFUDeivSV1r//AmANFHyqczZk+U6BDALU=
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@@ -394,8 +377,6 @@ github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lithammer/fuzzysearch v1.1.8 h1:/HIuJnjHuXS8bKaiTMeeDlW2/AyIWk2brx1V8LFgLN4=
 github.com/lithammer/fuzzysearch v1.1.8/go.mod h1:IdqeyBClc3FFqSzYq/MXESsS4S0FsZ5ajtkr5xPLts4=
-github.com/lucasb-eyer/go-colorful v1.3.0 h1:2/yBRLdWBZKrf7gB40FoiKfAWYQ0lqNcbuQwVHXptag=
-github.com/lucasb-eyer/go-colorful v1.3.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/lucasb-eyer/go-colorful v1.4.0 h1:UtrWVfLdarDgc44HcS7pYloGHJUjHV/4FwW4TvVgFr4=
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 github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0VQdvPDY=
@@ -408,8 +389,6 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
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 github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/mattn/go-runewidth v0.0.20 h1:WcT52H91ZUAwy8+HUkdM3THM6gXqXuLJi9O3rjcQQaQ=
-github.com/mattn/go-runewidth v0.0.20/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
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 github.com/mattn/goveralls v0.0.12 h1:PEEeF0k1SsTjOBQ8FOmrOAoCu4ytuMaWCnWe94zxbCg=
@@ -479,8 +458,6 @@ github.com/pterm/pterm v0.12.40/go.mod h1:ffwPLwlbXxP+rxT0GsgDTzS3y3rmpAO1NMjUkG
 github.com/pterm/pterm v0.12.83 h1:ie+YmGmA727VuhxBlyGr74Ks+7McV6kT99IB8EU80aA=
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@@ -541,8 +518,6 @@ github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
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@@ -579,8 +554,8 @@ github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsr
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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+github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
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@@ -645,8 +620,6 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
 golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -674,8 +647,6 @@ golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
-golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
 golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=

internal/handlers/github.go

@@ -14,14 +14,16 @@ import (
 
 	"github.com/stuttgart-things/homerun2-omni-pitcher/internal/models"
 	"github.com/stuttgart-things/homerun2-omni-pitcher/internal/pitcher"
+	"github.com/stuttgart-things/homerun2-omni-pitcher/internal/routing"
 
 	homerun "github.com/stuttgart-things/homerun-library/v3"
 )
 
 // NewGitHubPitchHandler creates a handler that accepts GitHub webhook payloads
 // and converts them into homerun.Message for pitching.
 // If webhookSecret is non-empty, the handler validates X-Hub-Signature-256.
-func NewGitHubPitchHandler(p pitcher.Pitcher, webhookSecret string) http.HandlerFunc {
+// If router is non-nil, the resolved stream is passed as a per-request override.
+func NewGitHubPitchHandler(p pitcher.Pitcher, webhookSecret string, router *routing.Router) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodPost {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
@@ -66,7 +68,8 @@ func NewGitHubPitchHandler(p pitcher.Pitcher, webhookSecret string) http.Handler
 
 		msg := githubEventToMessage(eventType, payload)
 
-		objectID, streamID, err := p.Pitch(msg)
+		stream := router.Resolve(r.URL.Path, msg)
+		objectID, streamID, err := p.Pitch(msg, stream)
 		if err != nil {
 			slog.Error("failed to pitch github event", "error", err, "event", eventType)
 			respondWithError(w, http.StatusServiceUnavailable, "Failed to enqueue event")