Remove duplicate code and reduce GET calls

[trivikr]

A subset of #28

Notes

Splits the code into three folders:

• dist: Existing folder for GitHub Action
• cache: Cached files for schedule and vulnerability list
  • This cache is latest at the time of writing, so two GET calls will not be made. We can set up a GitHub action to update the cache in future.
• src: Source code
  • index.js: Existing root file.
  • ascii.js: existing file for colors removed.
  • is-node-vulnerable.js: Existing file with some duplicate code removed.
  • is-node-eol.js: Renamed eol-versions.js, but it uses the cache if JSON is not provided.
  • store.js: Data store to be shared between different files.

Testing

Before

Uses cached version for end-of-life v16.20.2

$ DEBUG=1 node ./index.js

██████   █████  ███    ██  ██████  ███████ ███████
██   ██ ██   ██ ████   ██ ██       ██      ██   ██
██   ██ ███████ ██ ██  ██ ██   ███ █████   ███████
██   ██ ██   ██ ██  ██ ██ ██    ██ ██      ██   ██
██████  ██   ██ ██   ████  ██████  ███████ ██   ██


v16.20.2 is end-of-life. There are high chances of being vulnerable. Please upgrade it.

Downloads from upstream for vulnerable v20.0.0

$ DEBUG=1 node ./index.js
Creating local core.json
Creating local core.json

██████   █████  ███    ██  ██████  ███████ ███████
██   ██ ██   ██ ████   ██ ██       ██      ██   ██
██   ██ ███████ ██ ██  ██ ██   ███ █████   ███████
██   ██ ██   ██ ██  ██ ██ ██    ██ ██      ██   ██
██████  ██   ██ ██   ████  ██████  ███████ ██   ██
...

Downloads from upstream for vulnerable v20.18.0

$ DEBUG=1 node ./index.js
Loading local ETag for 'security'
Loading local ETag for 'schedule'
Creating local core.json
Creating local core.json

 █████  ██      ██           ██████   ██████   ██████  ██████         ██
██   ██ ██      ██          ██       ██    ██ ██    ██ ██   ██     ██  ██
███████ ██      ██          ██   ███ ██    ██ ██    ██ ██   ██         ██
██   ██ ██      ██          ██    ██ ██    ██ ██    ██ ██   ██     ██  ██
██   ██ ███████ ███████      ██████   ██████   ██████  ██████         ██

After

Uses cached version for end-of-life v16.20.2

$ DEBUG=1 node ./src/index.js

██████   █████  ███    ██  ██████  ███████ ███████
██   ██ ██   ██ ████   ██ ██       ██      ██   ██
██   ██ ███████ ██ ██  ██ ██   ███ █████   ███████
██   ██ ██   ██ ██  ██ ██ ██    ██ ██      ██   ██
██████  ██   ██ ██   ████  ██████  ███████ ██   ██

v16.20.2 is end-of-life. There are high chances of being vulnerable. Please upgrade it.

Uses cached version for vulnerable v20.0.0

$ DEBUG=1 node ./src/index.js
Loading local ETag for 'security'
Loading local ETag for 'schedule'
No updates from upstream. Getting a cached version: /Users/trivikram/workspace/is-my-node-vulnerable/cache/schedule.json
No updates from upstream. Getting a cached version: /Users/trivikram/workspace/is-my-node-vulnerable/cache/security.json


██████   █████  ███    ██  ██████  ███████ ███████
██   ██ ██   ██ ████   ██ ██       ██      ██   ██
██   ██ ███████ ██ ██  ██ ██   ███ █████   ███████
██   ██ ██   ██ ██  ██ ██ ██    ██ ██      ██   ██
██████  ██   ██ ██   ████  ██████  ███████ ██   ██

...

Uses cached version for non-vulnerable v20.18.0

$ DEBUG=1 node ./src/index.js
Loading local ETag for 'security'
Loading local ETag for 'schedule'
No updates from upstream. Getting a cached version: /Users/trivikram/workspace/is-my-node-vulnerable/cache/schedule.json
No updates from upstream. Getting a cached version: /Users/trivikram/workspace/is-my-node-vulnerable/cache/security.json


 █████  ██      ██           ██████   ██████   ██████  ██████         ██
██   ██ ██      ██          ██       ██    ██ ██    ██ ██   ██     ██  ██
███████ ██      ██          ██   ███ ██    ██ ██    ██ ██   ██         ██
██   ██ ██      ██          ██    ██ ██    ██ ██    ██ ██   ██     ██  ██
██   ██ ███████ ███████      ██████   ██████   ██████  ██████         ██

[trivikr]

The PR is ready for review.

I used path.resolve() so that vercel ncc can understand the location of cache directory.

[trivikr]

The PR is ready for review.

I used typeof __NCC__ to use path.resolve()

[trivikr]

I'm not sure why dist/index.js reduces from 1.3 MB in main to 160.7 kB in my workspace even in main branch.
I've reverted changes in dist/index.js, so that rest of the code can be reviewed.