feature: add pouch history functionality

apis/server/image_bridge.go

@@ -181,3 +181,15 @@ func (s *Server) saveImage(ctx context.Context, rw http.ResponseWriter, req *htt
 
 	return nil
 }
+
+// getImageHistory gets image history.
+func (s *Server) getImageHistory(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
+	imageName := mux.Vars(req)["name"]
+
+	history, err := s.ImageMgr.ImageHistory(ctx, imageName)
+	if err != nil {
+		return err
+	}
+
+	return EncodeResponse(rw, http.StatusOK, history)
+}

apis/server/router.go

@@ -68,6 +68,7 @@ func initRoute(s *Server) http.Handler {
 	s.addRoute(r, http.MethodPost, "/images/{name:.*}/tag", s.postImageTag)
 	s.addRoute(r, http.MethodPost, "/images/load", withCancelHandler(s.loadImage))
 	s.addRoute(r, http.MethodGet, "/images/save", withCancelHandler(s.saveImage))
+	s.addRoute(r, http.MethodGet, "/images/{name:.*}/history", s.getImageHistory)
 
 	// volume
 	s.addRoute(r, http.MethodGet, "/volumes", s.listVolume)

apis/swagger.yml

@@ -243,7 +243,7 @@ paths:
 
   /images/{imageid}/json:
     get:
-      summary: "Inspect a image"
+      summary: "Inspect an image"
       description: "Return the information about image"
       operationId: "ImageInspect"
       produces:
@@ -273,6 +273,27 @@ paths:
       parameters:
         - $ref: "#/parameters/imageid"
 
+  /images/{imageid}/history:
+    get:
+      summary: "Get an image's history"
+      description: "Return the history of each layer of image"
+      operationId: "ImageHistory"
+      produces:
+        - "application/json"
+      responses:
+        200:
+          description: "no error"
+          schema:
+            type: "array"
+            items:
+              $ref: "#/definitions/HistoryResultItem"
+        404:
+          $ref: "#/responses/404ErrorResponse"
+        500:
+          $ref: "#/responses/500ErrorResponse"
+      parameters:
+        - $ref: "#/parameters/imageid"
+
   /images/json:
     get:
       summary: "List Images"
@@ -2927,6 +2948,42 @@ definitions:
             description: "the base layer content hash."
             type: "string"
 
+  HistoryResultItem:
+    description: "An object containing image history at API side."
+    type: "object"
+    required: [ID, Created, CreatedBy, Author, Comment, EmptyLayer, Size]
+    properties:
+      ID:
+        description: "ID of each layer image."
+        type: "string"
+        x-nullable: false
+      Created:
+        description: "the combined date and time at which the layer was created."
+        type: "integer"
+        format: "int64"
+        x-nullable: false
+      CreatedBy:
+        description: "the command which created the layer."
+        type: "string"
+        x-nullable: false
+      Author:
+        description: "the author of the build point."
+        type: "string"
+        x-nullable: false
+      Comment:
+        description: "a custom message set when creating the layer."
+        type: "string"
+        x-nullable: false
+      EmptyLayer:
+        description: "mark whether the history item created a filesystem diff or not."
+        type: "boolean"
+        x-nullable: false
+      Size:
+        description: "size of each layer image."
+        type: "integer"
+        format: "int64"
+        x-nullable: false
+
   SearchResultItem:
     type: "object"
     description: "search result item in search results."