tomli 0.5.0

A simple CLI for quering and editing TOML files
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

use std::str;
use toml_edit::{DocumentMut, Item};

use crate::errors::TomliError;
use crate::parser;

pub(crate) fn parse_toml_path(path: Vec<parser::Item>, root: &Item) -> Result<&Item, TomliError> {
    let mut item = root;
    for segment in path.iter() {
        match segment {
            parser::Item::Key(key) => {
                item = if let Some(item) = item.get(key) {
                    item
                } else if item.as_array_of_tables().is_some() {
                    return Err(TomliError::InvalidKeyAccess(key.to_string()));
                } else {
                    return Err(TomliError::KeyNotFound(key.to_string()));
                }
            }
            parser::Item::ArrayIndex(index) => {
                item = if let Some(item) = item.get(index) {
                    item
                } else if item.as_array().is_some() || item.as_array_of_tables().is_some() {
                    return Err(TomliError::IndexOutOfBounds(*index));
                } else {
                    return Err(TomliError::InvalidKeyAccess(index.to_string()));
                }
            }
        };
    }

    Ok(item)
}

pub fn exec(document: &DocumentMut, query: &str) -> Result<String, TomliError> {
    // An empty query or a dot are evaluated as the whole document
    if query == "." || query.is_empty() {
        return Ok(document.to_string());
    }

    Ok(parse_toml_path(parser::evaluate(query)?, document.as_item())?.to_string())
}