Add commit ReleaseVersion to routing to return to clients in version request

Signed-off-by: Brian Meek <brian@hntlabs.com>

.github/workflows/docker.yml

@@ -72,6 +72,8 @@ jobs:
           file: ./build/docker/Dockerfile.monolith
           platforms: ${{ env.PLATFORMS }}
           push: true
+          build-args: |
+            RELEASE_VERSION=${{ env.RELEASE_VERSION }}
           tags: |
             ${{ env.DOCKER_NAMESPACE }}/dendrite-monolith:latest
             ${{ env.DOCKER_NAMESPACE }}/dendrite-monolith:${{ env.RELEASE_VERSION }}

build/docker/Dockerfile.monolith

@@ -2,12 +2,14 @@ FROM docker.io/golang:1.19-alpine AS base
 
 RUN apk --update --no-cache add bash build-base
 
+ARG RELEASE_VERSION="Unreleased"
+
 WORKDIR /build
 
 COPY . /build
 
 RUN mkdir -p bin
-RUN go build -trimpath -o bin/ ./cmd/dendrite-monolith-server
+RUN go build -trimpath -o bin/ -ldflags="-X routing.ReleaseVersion=$RELEASE_VERSION" ./cmd/dendrite-monolith-server
 RUN go build -trimpath -o bin/ ./cmd/create-account
 RUN go build -trimpath -o bin/ ./cmd/generate-keys
 

clientapi/routing/routing.go

@@ -41,6 +41,8 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+var ReleaseVersion string
+
 // Setup registers HTTP handlers with the given ServeMux. It also supplies the given http.Client
 // to clients which need to make outbound HTTP requests.
 //
@@ -101,7 +103,7 @@ func Setup(
 				JSON: struct {
 					Versions         []string        `json:"versions"`
 					UnstableFeatures map[string]bool `json:"unstable_features"`
-					BuildVersion     string          `json:"build_version"`
+					ReleaseVersion   string          `json:"release_version"`
 				}{Versions: []string{
 					"r0.0.1",
 					"r0.1.0",
@@ -113,7 +115,7 @@ func Setup(
 					"v1.0",
 					"v1.1",
 					"v1.2",
-				}, UnstableFeatures: unstableFeatures, BuildVersion: "TODO"},
+				}, UnstableFeatures: unstableFeatures, ReleaseVersion: ReleaseVersion},
 			}
 		}),
 	).Methods(http.MethodGet, http.MethodOptions)