Pass gitRepo down to GetRawDiff, since its used for main repo and wiki (#19461)

as per https://github.com/go-gitea/gitea/pull/19449#issuecomment-1105283931

pass gitRepo down to GetRawDiff, since its used for main repo and wiki

modules/git/diff.go

@@ -28,8 +28,8 @@ const (
 )
 
 // GetRawDiff dumps diff results of repository in given commit ID to io.Writer.
-func GetRawDiff(ctx context.Context, repoPath, commitID string, diffType RawDiffType, writer io.Writer) error {
-	return GetRawDiffForFile(ctx, repoPath, "", commitID, diffType, "", writer)
+func GetRawDiff(repo *Repository, commitID string, diffType RawDiffType, writer io.Writer) error {
+	return GetRepoRawDiffForFile(repo, "", commitID, diffType, "", writer)
 }
 
 // GetReverseRawDiff dumps the reverse diff results of repository in given commit ID to io.Writer.
@@ -46,17 +46,6 @@ func GetReverseRawDiff(ctx context.Context, repoPath, commitID string, writer io
 	return nil
 }
 
-// GetRawDiffForFile dumps diff results of file in given commit ID to io.Writer.
-func GetRawDiffForFile(ctx context.Context, repoPath, startCommit, endCommit string, diffType RawDiffType, file string, writer io.Writer) error {
-	repo, closer, err := RepositoryFromContextOrOpen(ctx, repoPath)
-	if err != nil {
-		return fmt.Errorf("RepositoryFromContextOrOpen: %v", err)
-	}
-	defer closer.Close()
-
-	return GetRepoRawDiffForFile(repo, startCommit, endCommit, diffType, file, writer)
-}
-
 // GetRepoRawDiffForFile dumps diff results of file in given commit ID to io.Writer according given repository
 func GetRepoRawDiffForFile(repo *Repository, startCommit, endCommit string, diffType RawDiffType, file string, writer io.Writer) error {
 	commit, err := repo.GetCommit(endCommit)

routers/api/v1/repo/commits.go

@@ -11,7 +11,6 @@ import (
 	"net/http"
 	"strconv"
 
-	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/convert"
@@ -268,17 +267,12 @@ func DownloadCommitDiffOrPatch(ctx *context.APIContext) {
 	//     "$ref": "#/responses/string"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
-	repoPath := repo_model.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
-	// TODO: use gitRepo from context
-	if err := git.GetRawDiff(
-		ctx,
-		repoPath,
-		ctx.Params(":sha"),
-		git.RawDiffType(ctx.Params(":diffType")),
-		ctx.Resp,
-	); err != nil {
+	sha := ctx.Params(":sha")
+	diffType := git.RawDiffType(ctx.Params(":diffType"))
+
+	if err := git.GetRawDiff(ctx.Repo.GitRepo, sha, diffType, ctx.Resp); err != nil {
 		if git.IsErrNotExist(err) {
-			ctx.NotFound(ctx.Params(":sha"))
+			ctx.NotFound(sha)
 			return
 		}
 		ctx.Error(http.StatusInternalServerError, "DownloadCommitDiffOrPatch", err)

routers/web/repo/cherry_pick.go

@@ -151,7 +151,7 @@ func CherryPickPost(ctx *context.Context) {
 				return
 			}
 		} else {
-			if err := git.GetRawDiff(ctx, ctx.Repo.Repository.RepoPath(), sha, git.RawDiffType("patch"), buf); err != nil {
+			if err := git.GetRawDiff(ctx.Repo.GitRepo, sha, git.RawDiffType("patch"), buf); err != nil {
 				if git.IsErrNotExist(err) {
 					ctx.NotFound("GetRawDiff", errors.New("commit "+ctx.Params(":sha")+" does not exist."))
 					return

routers/web/repo/commit.go

@@ -7,13 +7,13 @@ package repo
 
 import (
 	"errors"
+	"fmt"
 	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
 	asymkey_model "code.gitea.io/gitea/models/asymkey"
 	"code.gitea.io/gitea/models/db"
-	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/charset"
@@ -381,15 +381,24 @@ func Diff(ctx *context.Context) {
 
 // RawDiff dumps diff results of repository in given commit ID to io.Writer
 func RawDiff(ctx *context.Context) {
-	var repoPath string
+	var gitRepo *git.Repository
 	if ctx.Data["PageIsWiki"] != nil {
-		repoPath = ctx.Repo.Repository.WikiPath()
+		wikiRepo, err := git.OpenRepository(ctx, ctx.Repo.Repository.WikiPath())
+		if err != nil {
+			ctx.ServerError("OpenRepository", err)
+			return
+		}
+		defer wikiRepo.Close()
+		gitRepo = wikiRepo
 	} else {
-		repoPath = repo_model.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
+		gitRepo = ctx.Repo.GitRepo
+		if gitRepo == nil {
+			ctx.ServerError("GitRepo not open", fmt.Errorf("no open git repo for '%s'", ctx.Repo.Repository.FullName()))
+			return
+		}
 	}
 	if err := git.GetRawDiff(
-		ctx,
-		repoPath,
+		gitRepo,
 		ctx.Params(":sha"),
 		git.RawDiffType(ctx.Params(":ext")),
 		ctx.Resp,