feat: validate optional "requires" fields

demo/Makefile

@@ -1,22 +1,28 @@
+SHELL := bash
+wgc_router = pnpx tsx --env-file ../cli/.env ../cli/src/index.ts router
+
 generate:
 	go generate ./...
 
+compose-integration:
+	cd ../router-tests && ./update-config-no-edg.sh
+
 bump-deps:
 	./bump-deps.sh
 
 PHONY: plugin-build plugin-generate plugin-build-binary plugin-build-integration
 
 plugin-build:
-	pnpx tsx --env-file ../cli/.env ../cli/src/index.ts router plugin build ./pkg/subgraphs/projects --debug --go-module-path github.com/wundergraph/cosmo/demo/pkg/subgraphs/projects
+	$(wgc_router) plugin build ./pkg/subgraphs/projects --debug --go-module-path github.com/wundergraph/cosmo/demo/pkg/subgraphs/projects
 
 plugin-generate:
-	pnpx tsx --env-file ../cli/.env ../cli/src/index.ts router plugin build ./pkg/subgraphs/projects --generate-only --go-module-path github.com/wundergraph/cosmo/demo/pkg/subgraphs/projects
+	$(wgc_router) plugin build ./pkg/subgraphs/projects --generate-only --go-module-path github.com/wundergraph/cosmo/demo/pkg/subgraphs/projects
 
 plugin-build-binary:
 	cd pkg/subgraphs/projects/ && go build -o ./bin/$(shell go env GOOS)_$(shell go env GOARCH) ./src
 
 plugin-compose:
-	pnpx tsx --env-file ../cli/.env ../cli/src/index.ts router compose -i ./graph-with-plugin.yaml -o ./configWithPlugins.json
+	$(wgc_router) compose -i ./graph-with-plugin.yaml -o ./configWithPlugins.json
 	pnpx prettier ./configWithPlugins.json -w
 
 plugin-build-integration: plugin-build plugin-compose
@@ -30,7 +36,7 @@ plugin-build-ci: plugin-build-binary
 	cp -a pkg/subgraphs/projects/bin/* ../router/plugins/projects/bin/
 
 standalone-compose:
-	pnpx tsx --env-file ../cli/.env ../cli/src/index.ts router compose -i ./graph-with-standalone.yaml -o ./configWithStandalone.json
+	$(wgc_router) compose -i ./graph-with-standalone.yaml -o ./configWithStandalone.json
 	pnpx prettier ./configWithStandalone.json -w
 
 standalone-integration: standalone-compose

demo/go.mod

@@ -29,6 +29,7 @@ require (
 	github.com/MicahParks/keyfunc/v3 v3.3.5 // indirect
 	github.com/agnivade/levenshtein v1.2.1 // indirect
 	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/bahlo/generic-list-go v0.2.0 // indirect
 	github.com/benbjohnson/clock v1.3.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bufbuild/protocompile v0.14.1 // indirect
@@ -85,13 +86,15 @@ require (
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
 	github.com/hashicorp/yamux v0.1.1 // indirect
 	github.com/iancoleman/strcase v0.3.0 // indirect
+	github.com/invopop/jsonschema v0.13.0 // indirect
 	github.com/jensneuse/abstractlogger v0.0.4 // indirect
 	github.com/jensneuse/byte-template v0.0.0-20231025215717-69252eb3ed56 // indirect
 	github.com/kingledion/go-tools v0.6.0 // indirect
 	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
 	github.com/logrusorgru/aurora/v4 v4.0.0 // indirect
 	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mark3labs/mcp-go v0.36.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
@@ -142,6 +145,7 @@ require (
 	github.com/twmb/franz-go/pkg/kmsg v1.7.0 // indirect
 	github.com/urfave/cli/v2 v2.27.7 // indirect
 	github.com/vbatts/tar-split v0.12.1 // indirect
+	github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
 	github.com/wundergraph/astjson v0.0.0-20250106123708-be463c97e083 // indirect
 	github.com/wundergraph/cosmo/demo/pkg/subgraphs/projects v0.0.0-20250715110703-10f2e5f9c79e // indirect
 	github.com/wundergraph/graphql-go-tools/v2 v2.0.0-rc.220 // indirect

demo/go.sum

@@ -25,6 +25,8 @@ github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kk
 github.com/andybalholm/cascadia v1.3.3/go.mod h1:xNd9bqTn98Ln4DwST8/nG+H0yuB8Hmgu1YHNnWw0GeA=
 github.com/arbovm/levenshtein v0.0.0-20160628152529-48b4e1c0c4d0 h1:jfIu9sQUG6Ig+0+Ap1h4unLjW6YQJpKZVmUzxsD4E/Q=
 github.com/arbovm/levenshtein v0.0.0-20160628152529-48b4e1c0c4d0/go.mod h1:t2tdKJDJF9BV14lnkjHmOQgcvEKgtqs5a1N3LNdJhGE=
+github.com/bahlo/generic-list-go v0.2.0 h1:5sz/EEAK+ls5wF+NeqDpk5+iNdMDXrh3z3nPnH1Wvgk=
+github.com/bahlo/generic-list-go v0.2.0/go.mod h1:2KvAjgMlE5NNynlg/5iLrrCCZ2+5xWbdbCW3pNTGyYg=
 github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=
 github.com/benbjohnson/clock v1.3.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -179,6 +181,8 @@ github.com/hashicorp/yamux v0.1.1/go.mod h1:CtWFDAQgb7dxtzFs4tWbplKIe2jSi3+5vKbg
 github.com/iancoleman/strcase v0.3.0 h1:nTXanmYxhfFAMjZL34Ov6gkzEsSJZ5DbhxWjvSASxEI=
 github.com/iancoleman/strcase v0.3.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
 github.com/ianlancetaylor/demangle v0.0.0-20220319035150-800ac71e25c2/go.mod h1:aYm2/VgdVmcIU8iMfdMvDMsRAQjcfZSKFby6HOFvi/w=
+github.com/invopop/jsonschema v0.13.0 h1:KvpoAJWEjR3uD9Kbm2HWJmqsEaHt8lBUpd0qHcIi21E=
+github.com/invopop/jsonschema v0.13.0/go.mod h1:ffZ5Km5SWWRAIN6wbDXItl95euhFz2uON45H2qjYt+0=
 github.com/jensneuse/abstractlogger v0.0.4 h1:sa4EH8fhWk3zlTDbSncaWKfwxYM8tYSlQ054ETLyyQY=
 github.com/jensneuse/abstractlogger v0.0.4/go.mod h1:6WuamOHuykJk8zED/R0LNiLhWR6C7FIAo43ocUEB3mo=
 github.com/jensneuse/byte-template v0.0.0-20231025215717-69252eb3ed56 h1:wo26fh6a6Za0cOMZIopD2sfH/kq83SJ89ixUWl7pCWc=
@@ -187,6 +191,7 @@ github.com/jensneuse/diffview v1.0.0 h1:4b6FQJ7y3295JUHU3tRko6euyEboL825ZsXeZZM4
 github.com/jensneuse/diffview v1.0.0/go.mod h1:i6IacuD8LnEaPuiyzMHA+Wfz5mAuycMOf3R/orUY9y4=
 github.com/jhump/protoreflect v1.15.1 h1:HUMERORf3I3ZdX05WaQ6MIpd/NJ434hTp5YiKgfCL6c=
 github.com/jhump/protoreflect v1.15.1/go.mod h1:jD/2GMKKE6OqX8qTjhADU1e6DShO+gavG9e0Q693nKo=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/josharian/native v1.1.0 h1:uuaP0hAbW7Y4l0ZRQ6C9zfb7Mg1mbFKry/xzDAfmtLA=
 github.com/josharian/native v1.1.0/go.mod h1:7X/raswPFr05uY3HiLlYeyQntB6OO7E/d2Cu7qoaN2w=
 github.com/jsimonetti/rtnetlink/v2 v2.0.1 h1:xda7qaHDSVOsADNouv7ukSuicKZO7GgVUCXxpaIEIlM=
@@ -215,8 +220,9 @@ github.com/logrusorgru/aurora/v4 v4.0.0 h1:sRjfPpun/63iADiSvGGjgA1cAYegEWMPCJdUp
 github.com/logrusorgru/aurora/v4 v4.0.0/go.mod h1:lP0iIa2nrnT/qoFXcOZSrZQpJ1o6n2CUf/hyHi2Q4ZQ=
 github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 h1:6E+4a0GO5zZEnZ81pIr0yLvtUWk2if982qA3F3QD6H4=
 github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0/go.mod h1:zJYVVT2jmtg6P3p1VtQj7WsuWi/y4VnjVBn7F8KPB3I=
-github.com/mark3labs/mcp-go v0.30.0 h1:Taz7fiefkxY/l8jz1nA90V+WdM2eoMtlvwfWforVYbo=
-github.com/mark3labs/mcp-go v0.30.0/go.mod h1:rXqOudj/djTORU/ThxYx8fqEVj/5pvTuuebQ2RC7uk4=
+github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
+github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
+github.com/mark3labs/mcp-go v0.36.0 h1:rIZaijrRYPeSbJG8/qNDe0hWlGrCJ7FWHNMz2SQpTis=
 github.com/mark3labs/mcp-go v0.36.0/go.mod h1:T7tUa2jO6MavG+3P25Oy/jR7iCeJPHImCZHRymCn39g=
 github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
@@ -363,6 +369,8 @@ github.com/vbatts/tar-split v0.12.1 h1:CqKoORW7BUWBe7UL/iqTVvkTBOF8UvOMKOIZykxnn
 github.com/vbatts/tar-split v0.12.1/go.mod h1:eF6B6i6ftWQcDqEn3/iGFRFRo8cBIMSJVOpnNdfTMFA=
 github.com/vektah/gqlparser/v2 v2.5.30 h1:EqLwGAFLIzt1wpx1IPpY67DwUujF1OfzgEyDsLrN6kE=
 github.com/vektah/gqlparser/v2 v2.5.30/go.mod h1:D1/VCZtV3LPnQrcPBeR/q5jkSQIPti0uYCP/RI0gIeo=
+github.com/wk8/go-ordered-map/v2 v2.1.8 h1:5h/BUHu93oj4gIdvHHHGsScSTMijfx5PeYkE/fJgbpc=
+github.com/wk8/go-ordered-map/v2 v2.1.8/go.mod h1:5nJHM5DyteebpVlHnWMV0rPz6Zp7+xBAnxjb1X5vnTw=
 github.com/wundergraph/astjson v0.0.0-20250106123708-be463c97e083 h1:8/D7f8gKxTBjW+SZK4mhxTTBVpxcqeBgWF1Rfmltbfk=
 github.com/wundergraph/astjson v0.0.0-20250106123708-be463c97e083/go.mod h1:eOTL6acwctsN4F3b7YE+eE2t8zcJ/doLm9sZzsxxxrE=
 github.com/wundergraph/cosmo/composition-go v0.0.0-20250820135159-bf8852195d3f h1:TjxywtqT+D6Qa/WGg1Vqn4ogT6P7M+iuUxPgDds1/kU=

demo/pkg/subgraphs/availability/subgraph/schema.graphqls

@@ -7,5 +7,5 @@ type Mutation {
 }
 type Employee @key(fields: "id") {
   id: Int!
-  isAvailable: Boolean!
+  isAvailable: Boolean
 }

demo/pkg/subgraphs/employees/subgraph/generated/federation.requires.go

@@ -16,6 +16,16 @@ func (ec *executionContext) PopulateConsultancyRequires(ctx context.Context, ent
 	return nil
 }
 
+// PopulateCosmoRequires is the requires populator for the Cosmo entity.
+func (ec *executionContext) PopulateCosmoRequires(ctx context.Context, entity *model.Cosmo, reps map[string]any) error {
+	if lead, ok := reps["lead"].(map[string]interface{}); ok {
+		if isAvailable, ok := lead["isAvailable"].(bool); ok {
+			entity.IsLeadAvailable = &isAvailable
+		}
+	}
+	return nil
+}
+
 // PopulateEmployeeRequires is the requires populator for the Employee entity.
 func (ec *executionContext) PopulateEmployeeRequires(ctx context.Context, entity *model.Employee, reps map[string]any) error {
 	if mood, ok := reps["currentMood"].(string); ok {

demo/pkg/subgraphs/employees/subgraph/schema.graphqls

@@ -148,7 +148,7 @@ type Employee implements Identifiable @key(fields: "id") {
   currentMood: Mood! @external
   derivedMood: Mood! @requires(fields: "currentMood")
   # From the `availability` service. Only defined for use in @requires
-  isAvailable: Boolean! @external
+  isAvailable: Boolean @external
   rootFieldThrowsError: String @goField(forceResolver: true)
   rootFieldErrorWrapper: ErrorWrapper @goField(forceResolver: true)
 }
@@ -180,6 +180,7 @@ type Cosmo implements IProduct @key(fields: "upc") {
   upc: ID!
   engineers: [Employee!]!
   lead: Employee!
+  isLeadAvailable: Boolean @requires(fields: "lead { isAvailable }")
 }
 
 type SDK implements IProduct @key(fields: "upc") {