chore(sg): extract releaseregistry client package (#63382)

In preparation for reuse elsewhere.

dev/sg/internal/release/BUILD.bazel

@@ -21,6 +21,7 @@ go_library(
         "//dev/sg/internal/repo",
         "//dev/sg/internal/std",
         "//internal/jsonc",
+        "//internal/releaseregistry",
         "//lib/errors",
         "//lib/output",
         "@com_github_grafana_regexp//:regexp",

dev/sg/internal/release/list_release.go

@@ -1,10 +1,7 @@
 package release
 
 import (
-	"context"
 	"encoding/json"
-	"net/http"
-	"net/url"
 	"os"
 	"time"
 
@@ -12,70 +9,10 @@ import (
 
 	"github.com/sourcegraph/sourcegraph/dev/sg/internal/category"
 	"github.com/sourcegraph/sourcegraph/dev/sg/internal/std"
+	"github.com/sourcegraph/sourcegraph/internal/releaseregistry"
 	"github.com/sourcegraph/sourcegraph/lib/output"
 )
 
-const releaseRegistryEndpoint = "https://releaseregistry.sourcegraph.com/v1/"
-
-type RegistryVersion struct {
-	ID            int32      `json:"id"`
-	Name          string     `json:"name"`
-	Public        bool       `json:"public"`
-	CreatedAt     time.Time  `json:"created_at"`
-	PromotedAt    *time.Time `json:"promoted_at"`
-	Version       string     `json:"version"`
-	GitSHA        string     `json:"git_sha"`
-	IsDevelopment bool       `json:"is_development"`
-}
-
-type releaseRegistryClient struct {
-	endpoint string
-	client   http.Client
-}
-
-func newReleaseRegistryClient(endpoint string) *releaseRegistryClient {
-	return &releaseRegistryClient{
-		endpoint: endpoint,
-		client:   http.Client{},
-	}
-}
-
-func (r *releaseRegistryClient) newRequest(method, path string) (*http.Request, error) {
-	urlPath, err := url.JoinPath(r.endpoint, path)
-	if err != nil {
-		return nil, err
-	}
-
-	req, err := http.NewRequest(method, urlPath, nil)
-	if err != nil {
-		return nil, err
-	}
-	req.Header.Set("Accept", "application/json")
-	return req, nil
-}
-
-func (r *releaseRegistryClient) ListVersions(ctx context.Context) ([]RegistryVersion, error) {
-	req, err := r.newRequest(http.MethodGet, "releases")
-	if err != nil {
-		return nil, err
-	}
-
-	resp, err := r.client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-
-	results := []RegistryVersion{}
-
-	err = json.NewDecoder(resp.Body).Decode(&results)
-	if err != nil {
-		return nil, err
-	}
-
-	return results, nil
-}
-
 var listReleaseCommand = &cli.Command{
 	Name:      "list",
 	Usage:     "list versions from the release registry",
@@ -92,7 +29,7 @@ var listReleaseCommand = &cli.Command{
 }
 
 func listRegistryVersions(cmd *cli.Context) error {
-	client := newReleaseRegistryClient(releaseRegistryEndpoint)
+	client := releaseregistry.NewClient(releaseregistry.Endpoint)
 
 	out := std.NewOutput(os.Stderr, false)
 	pending := out.Pending(output.Line("", output.StylePending, "Fetching versions from the release registry..."))

internal/releaseregistry/BUILD.bazel

@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "releaseregistry",
+    srcs = ["client.go"],
+    importpath = "github.com/sourcegraph/sourcegraph/internal/releaseregistry",
+    visibility = ["//:__subpackages__"],
+)

internal/releaseregistry/README.md

@@ -0,0 +1,4 @@
+# releaseregistry
+
+A go client for <https://github.com/sourcegraph/releaseregistry>. Please see
+that repository for more details.

internal/releaseregistry/client.go

@@ -0,0 +1,70 @@
+package releaseregistry
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+const Endpoint = "https://releaseregistry.sourcegraph.com/v1/"
+
+type ReleaseInfo struct {
+	ID            int32      `json:"id"`
+	Name          string     `json:"name"`
+	Public        bool       `json:"public"`
+	CreatedAt     time.Time  `json:"created_at"`
+	PromotedAt    *time.Time `json:"promoted_at"`
+	Version       string     `json:"version"`
+	GitSHA        string     `json:"git_sha"`
+	IsDevelopment bool       `json:"is_development"`
+}
+
+type Client struct {
+	endpoint string
+	client   http.Client
+}
+
+func NewClient(endpoint string) *Client {
+	return &Client{
+		endpoint: endpoint,
+		client:   http.Client{},
+	}
+}
+
+func (r *Client) newRequest(ctx context.Context, method, path string) (*http.Request, error) {
+	urlPath, err := url.JoinPath(r.endpoint, path)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, urlPath, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Accept", "application/json")
+	return req, nil
+}
+
+func (r *Client) ListVersions(ctx context.Context) ([]ReleaseInfo, error) {
+	req, err := r.newRequest(ctx, http.MethodGet, "releases")
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := r.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	results := []ReleaseInfo{}
+
+	err = json.NewDecoder(resp.Body).Decode(&results)
+	if err != nil {
+		return nil, err
+	}
+
+	return results, nil
+}