Initial, working implementation

pkg/cmd/repo/autolink/autolink.go

@@ -4,6 +4,7 @@ import (
 	"github.com/MakeNowJust/heredoc"
 	cmdCreate "github.com/cli/cli/v2/pkg/cmd/repo/autolink/create"
 	cmdList "github.com/cli/cli/v2/pkg/cmd/repo/autolink/list"
+	cmdView "github.com/cli/cli/v2/pkg/cmd/repo/autolink/view"
 	"github.com/cli/cli/v2/pkg/cmdutil"
 	"github.com/spf13/cobra"
 )
@@ -24,6 +25,7 @@ func NewCmdAutolink(f *cmdutil.Factory) *cobra.Command {
 
 	cmd.AddCommand(cmdList.NewCmdList(f, nil))
 	cmd.AddCommand(cmdCreate.NewCmdCreate(f, nil))
+	cmd.AddCommand(cmdView.NewCmdView(f, nil))
 
 	return cmd
 }

pkg/cmd/repo/autolink/list/list.go

@@ -15,13 +15,6 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var autolinkFields = []string{
-	"id",
-	"isAlphanumeric",
-	"keyPrefix",
-	"urlTemplate",
-}
-
 type listOptions struct {
 	BaseRepo       func() (ghrepo.Interface, error)
 	Browser        browser.Browser
@@ -70,7 +63,7 @@ func NewCmdList(f *cmdutil.Factory, runF func(*listOptions) error) *cobra.Comman
 	}
 
 	cmd.Flags().BoolVarP(&opts.WebMode, "web", "w", false, "List autolink references in the web browser")
-	cmdutil.AddJSONFlags(cmd, &opts.Exporter, autolinkFields)
+	cmdutil.AddJSONFlags(cmd, &opts.Exporter, domain.AutolinkFields)
 
 	return cmd
 }

pkg/cmd/repo/autolink/shared/autolink.go

@@ -9,6 +9,13 @@ type Autolink struct {
 	URLTemplate    string `json:"url_template"`
 }
 
+var AutolinkFields = []string{
+	"id",
+	"isAlphanumeric",
+	"keyPrefix",
+	"urlTemplate",
+}
+
 func (a *Autolink) ExportData(fields []string) map[string]interface{} {
 	return cmdutil.StructExportData(a, fields)
 }

pkg/cmd/repo/autolink/view/http.go

@@ -0,0 +1,47 @@
+package view
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/cli/cli/v2/api"
+	"github.com/cli/cli/v2/internal/ghinstance"
+	"github.com/cli/cli/v2/internal/ghrepo"
+	"github.com/cli/cli/v2/pkg/cmd/repo/autolink/domain"
+)
+
+type AutolinkViewer struct {
+	HTTPClient *http.Client
+}
+
+func (a *AutolinkViewer) View(repo ghrepo.Interface, id string) (*domain.Autolink, error) {
+	path := fmt.Sprintf("repos/%s/%s/autolinks/%s", repo.RepoOwner(), repo.RepoName(), id)
+	url := ghinstance.RESTPrefix(repo.RepoHost()) + path
+	req, err := http.NewRequest(http.MethodGet, url, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := a.HTTPClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusNotFound {
+		return nil, fmt.Errorf("HTTP 404: Either no autolink with this ID exists for this repository or you are missing admin rights to the repository. (https://api.github.com/%s)", path)
+	} else if resp.StatusCode > 299 {
+		return nil, api.HandleHTTPError(resp)
+	}
+
+	var autolink domain.Autolink
+	err = json.NewDecoder(resp.Body).Decode(&autolink)
+
+	if err != nil {
+		fmt.Println(err.Error())
+		return nil, err
+	}
+
+	return &autolink, nil
+}

pkg/cmd/repo/autolink/view/view.go

@@ -0,0 +1,107 @@
+package view
+
+import (
+	"fmt"
+
+	"github.com/MakeNowJust/heredoc"
+	"github.com/cli/cli/v2/internal/browser"
+	"github.com/cli/cli/v2/internal/ghrepo"
+	"github.com/cli/cli/v2/pkg/cmd/repo/autolink/domain"
+	"github.com/cli/cli/v2/pkg/cmdutil"
+	"github.com/cli/cli/v2/pkg/iostreams"
+	"github.com/spf13/cobra"
+)
+
+type viewOptions struct {
+	BaseRepo       func() (ghrepo.Interface, error)
+	Browser        browser.Browser
+	AutolinkClient AutolinkViewClient
+	IO             *iostreams.IOStreams
+	Exporter       cmdutil.Exporter
+
+	ID string
+}
+
+type AutolinkViewClient interface {
+	View(repo ghrepo.Interface, id string) (*domain.Autolink, error)
+}
+
+func NewCmdView(f *cmdutil.Factory, runF func(*viewOptions) error) *cobra.Command {
+	opts := &viewOptions{
+		Browser: f.Browser,
+		IO:      f.IOStreams,
+	}
+
+	cmd := &cobra.Command{
+		Use:   "view <id>",
+		Short: "View an autolink reference",
+		Long: heredoc.Docf(`
+			View an autolink reference for a repository.
+
+			Information about autolinks is only available to repository administrators.
+		`),
+		Args: cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.BaseRepo = f.BaseRepo
+			httpClient, err := f.HttpClient()
+
+			if err != nil {
+				return err
+			}
+
+			opts.ID = args[0]
+
+			if err != nil {
+				return err
+			}
+
+			opts.AutolinkClient = &AutolinkViewer{HTTPClient: httpClient}
+
+			if runF != nil {
+				return runF(opts)
+			}
+
+			return viewRun(opts)
+		},
+	}
+
+	cmdutil.AddJSONFlags(cmd, &opts.Exporter, domain.AutolinkFields)
+
+	return cmd
+}
+
+func viewRun(opts *viewOptions) error {
+	repo, err := opts.BaseRepo()
+	if err != nil {
+		return err
+	}
+	cs := opts.IO.ColorScheme()
+
+	autolink, err := opts.AutolinkClient.View(repo, opts.ID)
+
+	if err != nil {
+		return fmt.Errorf("%s %w", cs.Red("error viewing autolink:"), err)
+	}
+
+	if opts.Exporter != nil {
+		return opts.Exporter.Write(opts.IO, autolink)
+	}
+
+	msg := heredoc.Docf(`
+			Autolink in %s
+
+			ID: %d
+			Key Prefix: %s
+			URL Template: %s
+			Alphanumeric: %t
+		`,
+		ghrepo.FullName(repo),
+		autolink.ID,
+		autolink.KeyPrefix,
+		autolink.URLTemplate,
+		autolink.IsAlphanumeric,
+	)
+	fmt.Fprint(opts.IO.Out, msg)
+
+	return nil
+}