### Install jora-cli

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

Installs the jora-cli globally using npm.

```bash
npm i -g jora-cli
```

--------------------------------

### Example: Find packages with multiple versions

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

Illustrates how to find packages that have more than one version installed by piping npm output to jora-cli and using a Jora query from a file.

```bash
npm ls --json | jora find-multi-version-packages.jora
```

--------------------------------

### Example: Get a single field

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

Demonstrates how to extract a specific field (e.g., 'version') from a JSON input using jora-cli.

```bash
jora version <package.json
```

--------------------------------

### Example: Count top-level dependencies

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

Shows how to count the total number of dependencies (both regular and dev) from a package.json file using a Jora query.

```bash
jora -i package.json -q '(dependencies.keys() + devDependencies.keys()).size()'
```

--------------------------------

### jora-cli Usage and Options

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

Details the command-line usage of jora-cli, including available options for query execution, input/output handling, and output formatting.

```APIDOC
Usage:

    jora [query] [options]

Options:

        --no-color               Suppress color output
        --dry-run                Don't output result, only report what it would have done
    -e, --encoding <encoding>    Output encoding: json (default), jsonxl (snapshot9)
    -f, --force                  Force overwriting output file
    -h, --help                   Output usage information
    -i, --input <filename>       Input file
    -o, --output <filename>      Output file (outputs to stdout if not set)
    -p, --pretty [indent]        Pretty print with optionally specified indentation (4 spaces by default)
    -q, --query <query>          Jora query
        --verbose                Output debug info about actions
    -v, --version                Output version
```

--------------------------------

### JSONXL Query and Conversion

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

Demonstrates querying JSONXL data and converting between JSON and JSONXL formats using jora-cli. JSONXL is a binary format for JSON data.

```bash
# Query JSONXL data
jora <input.jsonxl "select.something"

# Convert JSON to JSONXL
jora <input.json >output.jsonxl -e jsonxl

# Convert JSONXL to JSON
jora <input.jsonxl >output.json
```

--------------------------------

### Jora Query for Multiple Versions

Source: https://github.com/discoveryjs/jora-cli/blob/master/README.md

The Jora query used to identify packages with multiple versions. It processes dependency entries, groups them by name and version, and filters for groups with more than one version.

```js
..\(dependencies.entries().({ name: key, ...value }))
    .group(=>name, =>version)
    .({ name: key, versions: value })
    .[versions.size() > 1]
```

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