Add ability to download subpath archive (#36371)

closes: https://github.com/go-gitea/gitea/issues/4478

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/repo/view_content.tmpl

@@ -100,6 +100,11 @@
 					<a class="item" data-clipboard-text="{{.Repository.Link}}/src/commit/{{.CommitID}}/{{PathEscapeSegments .TreePath}}" data-clipboard-text-type="url">
 						{{svg "octicon-link" 16}}{{ctx.Locale.Tr "repo.file_copy_permalink"}}
 					</a>
+					{{if and (not $.DisableDownloadSourceArchives) $.RefFullName}}
+						<div class="divider"></div>
+						<a class="item muted archive-link" href="{{$.RepoLink}}/archive/{{PathEscapeSegments $.RefFullName.ShortName}}.zip?path={{PathEscapeSegments .TreePath}}" rel="nofollow">{{svg "octicon-file-zip"}}{{ctx.Locale.Tr "repo.download_directory_as" "ZIP"}}</a>
+						<a class="item muted archive-link" href="{{$.RepoLink}}/archive/{{PathEscapeSegments $.RefFullName.ShortName}}.tar.gz?path={{PathEscapeSegments .TreePath}}" rel="nofollow">{{svg "octicon-file-zip"}}{{ctx.Locale.Tr "repo.download_directory_as" "TAR.GZ"}}</a>
+					{{end}}
 					{{if and (.Permission.CanWrite ctx.Consts.RepoUnitTypeCode) (not .Repository.IsArchived) (not $isTreePathRoot)}}
 						<div class="divider"></div>
 						<a class="item tw-text-danger" href="{{.RepoLink}}/_delete/{{.BranchName | PathEscapeSegments}}/{{.TreePath | PathEscapeSegments}}">

templates/swagger/v1_json.tmpl

@@ -6256,6 +6256,16 @@
             "name": "archive",
             "in": "path",
             "required": true
+          },
+          {
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "collectionFormat": "multi",
+            "description": "subpath of the repository to download",
+            "name": "path",
+            "in": "query"
           }
         ],
         "responses": {