Update test setup

Signed-off-by: Joshua Li <joshuali925@gmail.com>

.gitignore

@@ -47,4 +47,6 @@ gen
 
 .java-version
 .worktrees
-http-client.env.json
+http-client.env.json
+/doctest/sql-cli/
+.factorypath

docs/user/ppl/interfaces/protocol.rst

@@ -129,7 +129,7 @@ PPL query::
     {
       "error": {
         "reason": "Error occurred in OpenSearch engine: no such index [unknown]",
-        "details": "[unknown] IndexNotFoundException[no such index [unknown]]\nFor more details, please send request for Json format to see the raw response from OpenSearch engine.",
+        "details": "org.opensearch.index.IndexNotFoundException: no such index [unknown]\nFor more details, please send request for Json format to see the raw response from OpenSearch engine.",
         "type": "IndexNotFoundException"
       },
       "status": 404

doctest/build.gradle

@@ -19,9 +19,12 @@ def path = project(':').projectDir
 // plugin module, and will only build ppl in it.
 def plugin_path = project(':doctest').projectDir
 
-task cloneSqlCli(type: Exec) {
+task cloneSqlCli() {
     // clone the sql-cli repo locally
-    commandLine 'git', 'clone', 'https://github.com/opensearch-project/sql-cli.git'
+    def cliRepo = new File("$projectDir/sql-cli")
+    if(!cliRepo.exists()) {
+        exec { commandLine 'git', 'clone', 'https://github.com/opensearch-project/sql-cli.git' }
+    }
 }
 
 task bootstrap(type: Exec, dependsOn: ['cloneSqlCli']) {