How to Use deno info Command for Module and Cache Details

Use the deno info command to display detailed information about a Deno script or module, including its dependencies and cache location. Run deno info [file] to see the dependency tree and cache paths for that file.

Syntax

The basic syntax of deno info is:

• deno info [OPTIONS] [FILE]

Where:

• FILE is the path or URL of the script or module you want to inspect.
• OPTIONS can modify the output, such as --json for JSON output or --json-path to filter JSON.

bash

deno info [OPTIONS] [FILE]

Example

This example shows how to use deno info on a local script app.ts to see its dependencies and cache info.

bash

deno info app.ts

Output

local:///path/to/app.ts
  Type: TypeScript
  Size: 1234 bytes
  Dependencies:
    https://deno.land/std@0.177.0/fs/mod.ts
    https://deno.land/std@0.177.0/path/mod.ts

Cache Location:
  /home/user/.cache/deno/deps/https/deno.land/std@0.177.0/fs/mod.ts
  /home/user/.cache/deno/deps/https/deno.land/std@0.177.0/path/mod.ts

Common Pitfalls

Common mistakes when using deno info include:

• Not specifying a file or URL, which shows info about the Deno cache root instead of a specific module.
• Expecting output for scripts that have not been run or cached yet, resulting in minimal info.
• Confusing deno info with deno run — deno info only inspects, it does not execute.

bash

Wrong usage:
den info

Right usage:
deno info app.ts

Quick Reference

Option	Description
--json	Outputs information in JSON format.
--json-path <path>	Filters JSON output using a JSON path expression.
--reload	Reloads remote modules before showing info.
FILE	Path or URL of the module to inspect.

Key Takeaways

Use deno info [file] to see detailed info about a Deno module's dependencies and cache.

Specify the file or URL to get info about that specific script; otherwise, it shows cache root info.

Use --json option for machine-readable output.

Remember deno info inspects modules but does not run them.

Use --reload to refresh remote dependencies before inspecting.