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https://github.com/fdncred/nu_plugin_json_path
A nushell plugin for parsing json that uses the json path specification.
https://github.com/fdncred/nu_plugin_json_path
Last synced: 4 months ago
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A nushell plugin for parsing json that uses the json path specification.
- Host: GitHub
- URL: https://github.com/fdncred/nu_plugin_json_path
- Owner: fdncred
- License: mit
- Created: 2023-02-20T01:51:05.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-03-15T16:21:18.000Z (4 months ago)
- Last Synced: 2024-03-15T17:44:12.368Z (4 months ago)
- Language: Rust
- Homepage:
- Size: 65.4 KB
- Stars: 9
- Watchers: 1
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-nu - nu_plugin_json_path
README
# nu_plugin_json_path
This [nushell](https://github.com/nushell/nushell) plugin is an attempt to enable the use of `JSONPath`. You can read more about JSONPath in the specification [here](https://www.ietf.org/archive/id/draft-ietf-jsonpath-base-10.html).
## Example Input
This json file is taken from the JSONPath link above.
```json
{
"store": {
"book": [
{ "category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{ "category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{ "category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{ "category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 399
}
}
}
```
## Syntax and Description
This table shows some example JSONPath syntax and the intended results for testing below.
|#|JSONPath |Intended result|
|-|-|-|
|1|`$.store.book[*].author` |the authors of all books in the store|
|2|`$..author` |all authors|
|3|`$.store.*` |all things in store, which are some books and a red bicycle|
|4|`$.store..price` |the prices of everything in the store|
|5|`$..book[2]` |the third book|
|6|`$..book[-1]` |the last book in order|
|7|`$..book[0,1]`|the first two books|
|8|`$..book[:2]` |the first two books|
|9|`$..book[?(@.isbn)]` |all books with an ISBN number|
|10|`$..book[?(@.price<10)]` |all books cheaper than 10|
|11|`$..*` |all member values and array elements |contained in the input value
## Plugin Examples
I saved the above json in a file named test.json, which is also in the repository.
### Example 1
```sh
open test.json | json path '$.store.book[*].author'
```
```
╭───┬──────────────────╮
│ 0 │ Nigel Rees │
│ 1 │ Evelyn Waugh │
│ 2 │ Herman Melville │
│ 3 │ J. R. R. Tolkien │
╰───┴──────────────────╯
```
### Example 2
```sh
open test.json | json path '$..author'
```
```
╭───┬──────────────────╮
│ 0 │ Nigel Rees │
│ 1 │ Evelyn Waugh │
│ 2 │ Herman Melville │
│ 3 │ J. R. R. Tolkien │
╰───┴──────────────────╯
```
### Example 3
```sh
open test.json | json path '$.store.*'
```
```
╭───┬───────────────────╮
│ 0 │ {record 2 fields} │
│ 1 │ [table 4 rows] │
╰───┴───────────────────╯
```
```sh
open test.json | json path '$.store.*' | get 0
```
```
╭───────┬─────╮
│ color │ red │
│ price │ 399 │
╰───────┴─────╯
```
```sh
open test.json | json path '$.store.*' | get 1
```
```
╭───┬──────────────────┬───────────┬───────┬────────────────────────┬───────────────╮
│ # │ author │ category │ price │ title │ isbn │
├───┼──────────────────┼───────────┼───────┼────────────────────────┼───────────────┤
│ 0 │ Nigel Rees │ reference │ 8.95 │ Sayings of the Century │ ❎ │
│ 1 │ Evelyn Waugh │ fiction │ 12.99 │ Sword of Honour │ ❎ │
│ 2 │ Herman Melville │ fiction │ 8.99 │ Moby Dick │ 0-553-21311-3 │
│ 3 │ J. R. R. Tolkien │ fiction │ 22.99 │ The Lord of the Rings │ 0-395-19395-8 │
╰───┴──────────────────┴───────────┴───────┴────────────────────────┴───────────────╯
```
### Example 4
```sh
open test.json | json path '$.store..price'
```
```
╭───┬───────╮
│ 0 │ 399 │
│ 1 │ 8.95 │
│ 2 │ 12.99 │
│ 3 │ 8.99 │
│ 4 │ 22.99 │
╰───┴───────╯
```
### Example 5
```sh
open test.json | json path '$..book[2]'
```
```
╭───┬─────────────────┬──────────┬───────────────┬───────┬───────────╮
│ # │ author │ category │ isbn │ price │ title │
├───┼─────────────────┼──────────┼───────────────┼───────┼───────────┤
│ 0 │ Herman Melville │ fiction │ 0-553-21311-3 │ 8.99 │ Moby Dick │
╰───┴─────────────────┴──────────┴───────────────┴───────┴───────────╯
```
### Example 6
```sh
open test.json | json path '$..book[-1]'
```
```
╭───┬──────────────────┬──────────┬───────────────┬───────┬───────────────────────╮
│ # │ author │ category │ isbn │ price │ title │
├───┼──────────────────┼──────────┼───────────────┼───────┼───────────────────────┤
│ 0 │ J. R. R. Tolkien │ fiction │ 0-395-19395-8 │ 22.99 │ The Lord of the Rings │
╰───┴──────────────────┴──────────┴───────────────┴───────┴───────────────────────╯
```
### Example 7
```sh
open test.json | json path '$..book[0,1]'
```
```
╭───┬──────────────┬───────────┬───────┬────────────────────────╮
│ # │ author │ category │ price │ title │
├───┼──────────────┼───────────┼───────┼────────────────────────┤
│ 0 │ Nigel Rees │ reference │ 8.95 │ Sayings of the Century │
│ 1 │ Evelyn Waugh │ fiction │ 12.99 │ Sword of Honour │
╰───┴──────────────┴───────────┴───────┴────────────────────────╯
```
### Example 8
```sh
open test.json | json path '$..book[:2]'
```
```
╭───┬──────────────┬───────────┬───────┬────────────────────────╮
│ # │ author │ category │ price │ title │
├───┼──────────────┼───────────┼───────┼────────────────────────┤
│ 0 │ Nigel Rees │ reference │ 8.95 │ Sayings of the Century │
│ 1 │ Evelyn Waugh │ fiction │ 12.99 │ Sword of Honour │
╰───┴──────────────┴───────────┴───────┴────────────────────────╯
```
### Example 9
```sh
open test.json | json path '$..book[?(@.isbn)]'
```
```
╭───┬──────────────────┬──────────┬───────────────┬───────┬───────────────────────╮
│ # │ author │ category │ isbn │ price │ title │
├───┼──────────────────┼──────────┼───────────────┼───────┼───────────────────────┤
│ 0 │ Herman Melville │ fiction │ 0-553-21311-3 │ 8.99 │ Moby Dick │
│ 1 │ J. R. R. Tolkien │ fiction │ 0-395-19395-8 │ 22.99 │ The Lord of the Rings │
╰───┴──────────────────┴──────────┴───────────────┴───────┴───────────────────────╯
```
### Example 10
```sh
open test.json | json path '$..book[?(@.price<10)]'
```
```
╭───┬─────────────────┬───────────┬───────┬────────────────────────┬───────────────╮
│ # │ author │ category │ price │ title │ isbn │
├───┼─────────────────┼───────────┼───────┼────────────────────────┼───────────────┤
│ 0 │ Nigel Rees │ reference │ 8.95 │ Sayings of the Century │ ❎ │
│ 1 │ Herman Melville │ fiction │ 8.99 │ Moby Dick │ 0-553-21311-3 │
╰───┴─────────────────┴───────────┴───────┴────────────────────────┴───────────────╯
```
### Example 11
```sh
open test.json | json path '$..*'
```
```
╭────┬────────────────────────╮
│ 0 │ {record 2 fields} │
│ 1 │ {record 2 fields} │
│ 2 │ [table 4 rows] │
│ 3 │ red │
│ 4 │ 399 │
│ 5 │ {record 4 fields} │
│ 6 │ {record 4 fields} │
│ 7 │ {record 5 fields} │
│ 8 │ {record 5 fields} │
│ 9 │ Nigel Rees │
│ 10 │ reference │
│ 11 │ 8.95 │
│ 12 │ Sayings of the Century │
│ 13 │ Evelyn Waugh │
│ 14 │ fiction │
│ 15 │ 12.99 │
│ 16 │ Sword of Honour │
│ 17 │ Herman Melville │
│ 18 │ fiction │
│ 19 │ 0-553-21311-3 │
│ 20 │ 8.99 │
│ 21 │ Moby Dick │
│ 22 │ J. R. R. Tolkien │
│ 23 │ fiction │
│ 24 │ 0-395-19395-8 │
│ 25 │ 22.99 │
│ 26 │ The Lord of the Rings │
╰────┴────────────────────────╯
```
# Building, Installing, and Registering
Since this plugin isn't published on crates.io, you will have to have the nushell repository cloned in order to build it.
This is a nushell script provided in [the first issue](https://github.com/fdncred/nu_plugin_json_path/issues/1). In that issue @amtoine explains, "as my repos are located in `$env.GIT_REPOS_HOME///`, i had to run the following".
```sh
[nu-plugin nu-protocol] | each {|crate|
let local = ($env.GIT_REPOS_HOME | path join "github.com" "nushell" "nushell" "crates" $crate)
cargo add $crate --path $local
}
```
Once the cargo.toml is updated, all you have to do is `cargo install --path .` and then, from within nushell do a `register /path/to/nu_plugin_json_path`.
Good luck!