cache

A tool to cache command line queries. It caches the result of a command for 1 hour, using the command and any arguments passed in as the key.

Use Case

This tool is useful when building long pipelined chains of bash commands. For example, when drilling into the response from an API using jq it can take a few iterations to extract the nested sub-fields that you need. Querying the API every time will:

• Be a lot slower, making it more frustrating to poke around.
• Potentially result in getting rate limited by the API, which stops all progress in its tracks.

Prepending the command with cache makes iteration fast, cheap, and easy. Getting the uncached value when your pipeline is built up is as easy as removing the cache prefix.

Performance

cache is blazing fast. The performance impact of caching the first response is negligible, and it matches the speed of Unix tools like cat when reading the cached values.

Usage

Usage:
  cache [flags] [command]

Flags:
  -c, --clear, --clean   Clear the cache.
  -o, --overwrite        Overwrite any cache entry for this command.
  -v, --verbose          Verbose logging.

Examples

  cache curl -X GET example.com

Installation

Homebrew

1. brew tap szabado/tools
2. brew install szabado/tools/cache

Build from source

This tool is built using Hermit, and fetches its own build tools as part of its build process. To build this from source:

1. Download the source.
2. Run ./bin/go build
3. Put the resultant cache binary in your PATH

Future improvements

• Allow cache to be used in the middle of a chain of pipes. Currently it can only be used on the first command.