Add cache destroy command

[mscottford]

cache destroy

Used to completely remove the cache directory and all of its contents, including the cache database.

freshli [global options] cache destroy [command options]

What this command does?

Deletes the cache directory and all files that it contains.

Global Otions

• --cache-dir <path>
  • the location where the freshli command will write temporary files as part of it’s processing
  • default value: $HOME/.freshli

Command Options

• --force
  • Skips the prompt confirming that operation should proceed

[CodeMouse92]

(d2+f2)*r2=8 energy

• Unit and acceptance tests for cache destroy
• destroy subcommand (unprompted without --force)
• Spike: does System.CommandLine have "flags", or only boolean options? (1 pomodoro)
• --force flag/option
• Spike: does System.CommandLine have a built-in y/N prompt? (1 pomodoro)
• Add y/N prompt to destroy subcommand
• --force flag/option implementation in destroy subcommand

Notes:
Deleting files and directories must be portable.

Possible unexpected deletion risk if --cache-dir is pointed to /home/user/ or some other directory containing unrelated files. To prevent this:

1. Maintain a list of names of known cache files.
2. If no known cache files are present in cache-dir, fail with warning message.
3. Delete known cache files in cache-dir.
4. Check if cache-dir is empty. If so, delete it; else if not, warn and do not delete directory.

There should be no way around this behavior, even with --force.