coder · code-asher · Apr 7, 2022 · Apr 5, 2022 · Apr 5, 2022 · Apr 5, 2022
diff --git a/cli/buildinfo/buildinfo.go → buildinfo/buildinfo.go b/cli/buildinfo/buildinfo.go → buildinfo/buildinfo.go
diff --git a/cli/buildinfo/buildinfo_test.go → buildinfo/buildinfo_test.go b/cli/buildinfo/buildinfo_test.go → buildinfo/buildinfo_test.go
@@ -6,7 +6,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"golang.org/x/mod/semver"
 
-	"github.com/coder/coder/cli/buildinfo"
+	"github.com/coder/coder/buildinfo"
 )
 
 func TestBuildInfo(t *testing.T) {

diff --git a/cli/root.go b/cli/root.go
@@ -11,7 +11,7 @@ import (
 	"github.com/mattn/go-isatty"
 	"github.com/spf13/cobra"
 
-	"github.com/coder/coder/cli/buildinfo"
+	"github.com/coder/coder/buildinfo"
 	"github.com/coder/coder/cli/cliui"
 	"github.com/coder/coder/cli/config"
 	"github.com/coder/coder/codersdk"

diff --git a/coderd/coderd.go b/coderd/coderd.go
@@ -7,16 +7,19 @@ import (
 	"time"
 
 	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/render"
 	"google.golang.org/api/idtoken"
 
 	chitrace "gopkg.in/DataDog/dd-trace-go.v1/contrib/go-chi/chi.v5"
 
 	"cdr.dev/slog"
+	"github.com/coder/coder/buildinfo"
 	"github.com/coder/coder/coderd/awsidentity"
 	"github.com/coder/coder/coderd/database"
 	"github.com/coder/coder/coderd/gitsshkey"
 	"github.com/coder/coder/coderd/httpapi"
 	"github.com/coder/coder/coderd/httpmw"
+	"github.com/coder/coder/codersdk"
 	"github.com/coder/coder/site"
 )
 
@@ -59,6 +62,15 @@ func New(options *Options) (http.Handler, func()) {
 				Message: "👋",
 			})
 		})
+		r.Route("/buildinfo", func(r chi.Router) {
+			r.Get("/", func(rw http.ResponseWriter, r *http.Request) {
+				render.Status(r, http.StatusOK)
+				render.JSON(rw, r, codersdk.BuildInfoResponse{
+					ExternalURL: buildinfo.ExternalURL(),
+					Version:     buildinfo.Version(),
+				})
+			})
+		})
 		r.Route("/files", func(r chi.Router) {
 			r.Use(
 				httpmw.ExtractAPIKey(options.Database, nil),

diff --git a/coderd/coderd_test.go b/coderd/coderd_test.go
@@ -1,11 +1,26 @@
 package coderd_test
 
 import (
+	"context"
 	"testing"
 
 	"go.uber.org/goleak"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/coder/coder/buildinfo"
+	"github.com/coder/coder/coderd/coderdtest"
 )
 
 func TestMain(m *testing.M) {
 	goleak.VerifyTestMain(m)
 }
+
+func TestBuildInfo(t *testing.T) {
+	t.Parallel()
+	client := coderdtest.New(t, nil)
+	buildInfo, err := client.BuildInfo(context.Background())
+	require.NoError(t, err)
+	require.Equal(t, buildinfo.ExternalURL(), buildInfo.ExternalURL, "external URL")
+	require.Equal(t, buildinfo.Version(), buildInfo.Version, "version")
+}
diff --git a/codersdk/buildinfo.go b/codersdk/buildinfo.go
@@ -0,0 +1,33 @@
+package codersdk
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+)
+
+// BuildInfoResponse contains build information for this instance of Coder.
+type BuildInfoResponse struct {
+	// ExternalURL is a URL referencing the current Coder version.  For production
+	// builds, this will link directly to a release.  For development builds, this
+	// will link to a commit.
+	ExternalURL string `json:"external_url"`
+	// Version returns the semantic version of the build.
+	Version string `json:"version"`
+}
+
+// BuildInfo returns build information for this instance of Coder.
+func (c *Client) BuildInfo(ctx context.Context) (BuildInfoResponse, error) {
+	res, err := c.request(ctx, http.MethodGet, "/api/v2/buildinfo", nil)
+	if err != nil {
+		return BuildInfoResponse{}, err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != http.StatusOK {
+		return BuildInfoResponse{}, readBodyAsError(res)
+	}
+
+	var buildInfo BuildInfoResponse
+	return buildInfo, json.NewDecoder(res.Body).Decode(&buildInfo)
+}
diff --git a/site/src/api/index.ts b/site/src/api/index.ts
@@ -68,3 +68,8 @@ export const getApiKey = async (): Promise<Types.APIKeyResponse> => {
   const response = await axios.post<Types.APIKeyResponse>("/api/v2/users/me/keys")
   return response.data
 }
+
+export const getBuildInfo = async (): Promise<Types.BuildInfoResponse> => {
+  const response = await axios.get("/api/v2/buildinfo")
+  return response.data
+}
diff --git a/site/src/api/types.ts b/site/src/api/types.ts
@@ -1,3 +1,11 @@
+/**
+ * `BuildInfoResponse` must be kept in sync with the go struct in buildinfo.go.
+ */
+export interface BuildInfoResponse {
+  external_url: string
+  version: string
+}
+
 export interface LoginResponse {
   session_token: string
 }

diff --git a/site/src/components/Page/Footer.test.tsx b/site/src/components/Page/Footer.test.tsx
@@ -1,7 +1,7 @@
 import { screen } from "@testing-library/react"
 import React from "react"
-import { render } from "../../test_helpers"
-import { Footer } from "./Footer"
+import { MockBuildInfo, render } from "../../test_helpers"
+import { Footer, Language } from "./Footer"
 
 describe("Footer", () => {
   it("renders content", async () => {
@@ -10,5 +10,6 @@ describe("Footer", () => {
 
     // Then
     await screen.findByText("Copyright", { exact: false })
+    await screen.findByText(Language.buildInfoText(MockBuildInfo))
   })
 })
diff --git a/site/src/components/Page/Footer.tsx b/site/src/components/Page/Footer.tsx
@@ -1,9 +1,21 @@
+import Link from "@material-ui/core/Link"
 import { makeStyles } from "@material-ui/core/styles"
 import Typography from "@material-ui/core/Typography"
-import React from "react"
+import { useActor } from "@xstate/react"
+import React, { useContext } from "react"
+import { BuildInfoResponse } from "../../api/types"
+import { XServiceContext } from "../../xServices/StateContext"
+
+export const Language = {
+  buildInfoText: (buildInfo: BuildInfoResponse): string => {
+    return `Coder ${buildInfo.version}`
+  },
+}
 
 export const Footer: React.FC = ({ children }) => {
   const styles = useFooterStyles()
+  const xServices = useContext(XServiceContext)
+  const [buildInfoState] = useActor(xServices.buildInfoXService)
 
   return (
     <div className={styles.root}>
@@ -13,11 +25,13 @@ export const Footer: React.FC = ({ children }) => {
           {`Copyright \u00a9 ${new Date().getFullYear()} Coder Technologies, Inc. All rights reserved.`}
         </Typography>
       </div>
-      <div className={styles.version}>
-        <Typography color="textSecondary" variant="caption">
-          v2 0.0.0-prototype
-        </Typography>
-      </div>
+      {buildInfoState.context.buildInfo && (
+        <div className={styles.buildInfo}>
+          <Link variant="caption" href={buildInfoState.context.buildInfo.external_url}>
+            {Language.buildInfoText(buildInfoState.context.buildInfo)}
+          </Link>
+        </div>
+      )}
     </div>
   )
 }
@@ -29,11 +43,9 @@ const useFooterStyles = makeStyles((theme) => ({
     flex: "0",
   },
   copyRight: {
-    backgroundColor: theme.palette.background.default,
     margin: theme.spacing(0.25),
   },
-  version: {
-    backgroundColor: theme.palette.background.default,
+  buildInfo: {
     margin: theme.spacing(0.25),
   },
 }))
diff --git a/site/src/test_helpers/entities.ts b/site/src/test_helpers/entities.ts
@@ -1,9 +1,22 @@
-import { Organization, Provisioner, Template, UserAgent, UserResponse, Workspace } from "../api/types"
+import {
+  BuildInfoResponse,
+  Organization,
+  Provisioner,
+  Template,
+  UserAgent,
+  UserResponse,
+  Workspace,
+} from "../api/types"
 
 export const MockSessionToken = { session_token: "my-session-token" }
 
 export const MockAPIKey = { key: "my-api-key" }
 
+export const MockBuildInfo: BuildInfoResponse = {
+  external_url: "file:///mock-url",
+  version: "v99.999.9999+c9cdf14",
+}
+
 export const MockUser: UserResponse = {
   id: "test-user",
   username: "TestUser",

diff --git a/site/src/test_helpers/handlers.ts b/site/src/test_helpers/handlers.ts
@@ -2,6 +2,11 @@ import { rest } from "msw"
 import * as M from "./entities"
 
 export const handlers = [
+  // build info
+  rest.get("/api/v2/buildinfo", async (req, res, ctx) => {
+    return res(ctx.status(200), ctx.json(M.MockBuildInfo))
+  }),
+
   // organizations
   rest.get("/api/v2/organizations/:organizationId", async (req, res, ctx) => {
     return res(ctx.status(200), ctx.json(M.MockOrganization))

diff --git a/site/src/xServices/StateContext.tsx b/site/src/xServices/StateContext.tsx
@@ -1,9 +1,11 @@
 import { useInterpret } from "@xstate/react"
 import React, { createContext } from "react"
 import { ActorRefFrom } from "xstate"
+import { buildInfoMachine } from "./buildInfo/buildInfoXService"
 import { userMachine } from "./user/userXService"
 
 interface XServiceContextType {
+  buildInfoXService: ActorRefFrom<typeof buildInfoMachine>
   userXService: ActorRefFrom<typeof userMachine>
 }
 
@@ -18,7 +20,14 @@ interface XServiceContextType {
 export const XServiceContext = createContext({} as XServiceContextType)
 
 export const XServiceProvider: React.FC = ({ children }) => {
-  const userXService = useInterpret(userMachine)
-
-  return <XServiceContext.Provider value={{ userXService }}>{children}</XServiceContext.Provider>
+  return (
+    <XServiceContext.Provider
+      value={{
+        buildInfoXService: useInterpret(buildInfoMachine),
+        userXService: useInterpret(userMachine),
+      }}
+    >
+      {children}
+    </XServiceContext.Provider>
+  )
 }
diff --git a/site/src/xServices/buildInfo/buildInfoXService.ts b/site/src/xServices/buildInfo/buildInfoXService.ts
@@ -0,0 +1,74 @@
+import { assign, createMachine } from "xstate"
+import * as API from "../../api"
+import * as Types from "../../api/types"
+
+export interface BuildInfoContext {
+  getBuildInfoError?: Error | unknown
+  buildInfo?: Types.BuildInfoResponse
+}
+
+export const buildInfoMachine = createMachine(
+  {
+    tsTypes: {} as import("./buildInfoXService.typegen").Typegen0,
+    schema: {
+      context: {} as BuildInfoContext,
+      services: {} as {
+        getBuildInfo: {
+          data: Types.BuildInfoResponse
+        }
+      },
+    },
+    context: {
+      buildInfo: undefined,
+    },
+    id: "buildInfoState",
+    initial: "gettingBuildInfo",
+    states: {
+      gettingBuildInfo: {
+        invoke: {
+          src: "getBuildInfo",
+          id: "getBuildInfo",
+          onDone: [
+            {
+              actions: ["assignBuildInfo", "clearGetBuildInfoError"],
+              target: "#buildInfoState.success",
+            },
+          ],
+          onError: [
+            {
+              actions: ["assignGetBuildInfoError", "clearBuildInfo"],
+              target: "#buildInfoState.failure",
+            },
+          ],
+        },
+      },
+      success: {
+        type: "final",
+      },
+      failure: {
+        type: "final",
+      },
+    },
+  },
+  {
+    services: {
+      getBuildInfo: API.getBuildInfo,
+    },
+    actions: {
+      assignBuildInfo: assign({
+        buildInfo: (_, event) => event.data,
+      }),
+      clearBuildInfo: assign((context: BuildInfoContext) => ({
+        ...context,
+        buildInfo: undefined,
+      })),
+      assignGetBuildInfoError: assign({
+        getBuildInfoError: (_, event) => event.data,
+      }),
+      clearGetBuildInfoError: assign((context: BuildInfoContext) => ({
+        ...context,
+        getBuildInfoError: undefined,
+      })),
+    },
+  },
+)