Convert site to Hugo (#8316)

This commit converts content and layout to use Hugo.
2018-05-05 18:00:51 +02:00
parent 7745f0e0c5
commit 7f3b633aa0
2327 changed files with 10928 additions and 171503 deletions
@@ -0,0 +1,75 @@
+---
+title: JSONPath Support
+---
+
+JSONPath template is composed of JSONPath expressions enclosed by {}.
+And we add three functions in addition to the original JSONPath syntax:
+
+1. The `$` operator is optional since the expression always starts from the root object by default.
+2. We can use `""` to quote text inside JSONPath expressions.
+3. We can use `range` operator to iterate lists.
+4. We can use negative slice indices to step backwards through a list. Negative indices do not "wrap around" a list. They are valid as long as `-index + listLength >= 0`.
+
+The result object is printed as its String() function.
+
+Given the input:
+
+```json
+{
+  "kind": "List",
+  "items":[
+    {
+      "kind":"None",
+      "metadata":{"name":"127.0.0.1"},
+      "status":{
+        "capacity":{"cpu":"4"},
+        "addresses":[{"type": "LegacyHostIP", "address":"127.0.0.1"}]
+      }
+    },
+    {
+      "kind":"None",
+      "metadata":{"name":"127.0.0.2"},
+      "status":{
+        "capacity":{"cpu":"8"},
+        "addresses":[
+          {"type": "LegacyHostIP", "address":"127.0.0.2"},
+          {"type": "another", "address":"127.0.0.3"}
+        ]
+      }
+    }
+  ],
+  "users":[
+    {
+      "name": "myself",
+      "user": {}
+    },
+    {
+      "name": "e2e",
+      "user": {"username": "admin", "password": "secret"}
+    }
+  ]
+}
+```
+
+Function | Description        | Example            | Result
+---------|--------------------|--------------------|------------------
+text     | the plain text     | kind is {.kind}    | kind is List
+@        | the current object | {@}                | the same as input
+. or []  | child operator     | {.kind} or {[&#39;kind&#39;]}| List
+..       | recursive descent  | {..name}           | 127.0.0.1 127.0.0.2 myself e2e
+*        | wildcard. Get all objects| {.items[*].metadata.name} | [127.0.0.1 127.0.0.2]
+[start:end :step] | subscript operator | {.users[0].name}| myself
+[,]      | union operator     | {.items[*][&#39;metadata.name&#39;, &#39;status.capacity&#39;]} | 127.0.0.1 127.0.0.2 map[cpu:4] map[cpu:8]
+?()      | filter             | {.users[?(@.name==&#34;e2e&#34;)].user.password} | secret
+range, end | iterate list | {range .items[*]}[{.metadata.name}, {.status.capacity}] {end} | [127.0.0.1, map[cpu:4]] [127.0.0.2, map[cpu:8]]
+&#39;&#39;      | quote interpreted string | {range .items[*]}{.metadata.name}{&#39;\t&#39;}{end} | 127.0.0.1    127.0.0.2
+
+Below are some examples using jsonpath:
+
+```shell
+$ kubectl get pods -o json
+$ kubectl get pods -o=jsonpath='{@}'
+$ kubectl get pods -o=jsonpath='{.items[0]}'
+$ kubectl get pods -o=jsonpath='{.items[0].metadata.name}'
+$ kubectl get pods -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.startTime}{"\n"}{end}'
+```