willdoescode
diff --git a/‎api/queries_pr.go‎
Lines changed: 8 additions & 16 deletions b/‎api/queries_pr.go‎
Lines changed: 8 additions & 16 deletions
diff --git a/‎command/pr_diff.go‎
Lines changed: 0 additions & 104 deletions b/‎command/pr_diff.go‎
Lines changed: 0 additions & 104 deletions
diff --git a/‎command/pr_diff_test.go‎
Lines changed: 0 additions & 104 deletions b/‎command/pr_diff_test.go‎
Lines changed: 0 additions & 104 deletions
diff --git a/‎command/root.go‎
Lines changed: 2 additions & 0 deletions b/‎command/root.go‎
Lines changed: 2 additions & 0 deletions
@@ -4,7 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 
@@ -209,36 +209,28 @@ func (pr *PullRequest) ChecksStatus() (summary PullRequestChecksStatus) {
 	return
 }
 
-func (c Client) PullRequestDiff(baseRepo ghrepo.Interface, prNumber int) (string, error) {
+func (c Client) PullRequestDiff(baseRepo ghrepo.Interface, prNumber int) (io.ReadCloser, error) {
 	url := fmt.Sprintf("https://api.github.com/repos/%s/pulls/%d",
 		ghrepo.FullName(baseRepo), prNumber)
 	req, err := http.NewRequest("GET", url, nil)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
 	req.Header.Set("Accept", "application/vnd.github.v3.diff; charset=utf-8")
 
 	resp, err := c.http.Do(req)
 	if err != nil {
-		return "", err
-	}
-	defer resp.Body.Close()
-
-	b, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return "", err
-	}
-
-	if resp.StatusCode == 200 {
-		return string(b), nil
+		return nil, err
 	}
 
 	if resp.StatusCode == 404 {
-		return "", &NotFoundError{errors.New("pull request not found")}
+		return nil, &NotFoundError{errors.New("pull request not found")}
+	} else if resp.StatusCode != 200 {
+		return nil, handleHTTPError(resp)
 	}
 
-	return "", errors.New("pull request diff lookup failed")
+	return resp.Body, nil
 }
 
 func PullRequests(client *Client, repo ghrepo.Interface, currentPRNumber int, currentPRHeadRef, currentUsername string) (*PullRequestsPayload, error) {
 
@@ -22,6 +22,7 @@ import (
 	"github.com/cli/cli/internal/run"
 	apiCmd "github.com/cli/cli/pkg/cmd/api"
 	gistCreateCmd "github.com/cli/cli/pkg/cmd/gist/create"
+	prDiffCmd "github.com/cli/cli/pkg/cmd/pr/diff"
 	prReviewCmd "github.com/cli/cli/pkg/cmd/pr/review"
 	repoCmd "github.com/cli/cli/pkg/cmd/repo"
 	repoCloneCmd "github.com/cli/cli/pkg/cmd/repo/clone"
@@ -170,6 +171,7 @@ func init() {
 	repoCmd.Cmd.AddCommand(creditsCmd.NewCmdRepoCredits(&repoResolvingCmdFactory, nil))
 
 	prCmd.AddCommand(prReviewCmd.NewCmdReview(&repoResolvingCmdFactory, nil))
+	prCmd.AddCommand(prDiffCmd.NewCmdDiff(&repoResolvingCmdFactory, nil))
 
 	RootCmd.AddCommand(creditsCmd.NewCmdCredits(cmdFactory, nil))
 }