Gracefully handle bare repositories on API operations. (#1932)

Signed-off-by: Dennis Keitzel <github@pinshot.net>

models/repo_branch.go

@@ -39,7 +39,7 @@ func GetBranchesByPath(path string) ([]*Branch, error) {
 // GetBranch returns a branch by it's name
 func (repo *Repository) GetBranch(branch string) (*Branch, error) {
 	if !git.IsBranchExist(repo.RepoPath(), branch) {
-		return nil, &ErrBranchNotExist{branch}
+		return nil, ErrBranchNotExist{branch}
 	}
 	return &Branch{
 		Path: repo.RepoPath(),

routers/api/v1/repo/branch.go

@@ -7,6 +7,7 @@ package repo
 import (
 	api "code.gitea.io/sdk/gitea"
 
+	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/routers/api/v1/convert"
 )
@@ -16,7 +17,11 @@ import (
 func GetBranch(ctx *context.APIContext) {
 	branch, err := ctx.Repo.Repository.GetBranch(ctx.Params(":branchname"))
 	if err != nil {
-		ctx.Error(500, "GetBranch", err)
+		if models.IsErrBranchNotExist(err) {
+			ctx.Error(404, "GetBranch", err)
+		} else {
+			ctx.Error(500, "GetBranch", err)
+		}
 		return
 	}
 

routers/api/v1/repo/file.go

@@ -20,6 +20,11 @@ func GetRawFile(ctx *context.APIContext) {
 		return
 	}
 
+	if ctx.Repo.Repository.IsBare {
+		ctx.Status(404)
+		return
+	}
+
 	blob, err := ctx.Repo.Commit.GetBlobByPath(ctx.Repo.TreePath)
 	if err != nil {
 		if git.IsErrNotExist(err) {