add expand option

README.md

@@ -23,6 +23,7 @@ Required Embulk version >= 0.9.20
 - **password** JIRA password or API keys (string, required)
 - **uri** JIRA API endpoint (string, required)
 - **jql** [JQL](https://confluence.atlassian.com/display/JIRA/Advanced+Searching) for extract target issues (string, required)
+- **expand** Use [expand](https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issue-search/#api-rest-api-3-search-get) to include additional information about issues in the response (array, optional)
 - **columns** target issue attributes. You can generate this configuration by `guess` command (array, required)
 - **retry_initial_wait_sec**: Wait seconds for exponential backoff initial value (integer, default: 1)
 - **retry_limit**: Try to retry this times (integer, default: 5)

src/main/java/org/embulk/input/jira/JiraInputPlugin.java

@@ -79,6 +79,10 @@ public interface PluginTask
         @ConfigDefault("null")
         public Optional<String> getJQL();
 
+        @Config("expand")
+        @ConfigDefault("[]")
+        public List<String> getExpand();
+
         @Config("columns")
         public SchemaConfig getColumns();
 

src/main/java/org/embulk/input/jira/client/JiraClient.java

@@ -254,6 +254,11 @@ private String createSearchIssuesBody(final PluginTask task, final int startAt,
         final JsonArray fields = new JsonArray();
         fields.add("*all");
         body.add("fields", fields);
+        final JsonArray expand = new JsonArray();
+        task.getExpand().forEach(e -> {
+            expand.add(e);
+        });
+        body.add("expand", expand);
         return body.toString();
     }
 }