Add support for an include option (in addition to ignore)

Preflight Checklist

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project follows, as appropriate.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem Description

AFAICS (apologies if I missed smth) electron-packager has a way to ignore paths from getting copied to the output artifact, but blacklisting is a risky way to decide what goes in. Add a file with sensitive info to the repo, forget to add it to ignore, and BAM!

A whitelist is stable and does answer directly the question: what goes into the artifact?

Proposed Solution

In the best of worlds, you should just follow npm pack, meaning respect the files section in package.json, and if none - respect the .npmignore (or just stick to the current --ignore flag).

[zacharyrankin]

👋 I was able to get the regex to work using '^\/(?!(dist|node_modules|package\.json))' (the initial slash ensures it is in the root) … if you include this as a script in your package.json make sure you escape the backslashes, e.g., '^\\/(?!(dist|node_modules|package\\.json))'

[LordMidi]

Any news here? Please give me an example to exclude everything except one folder i.e. “dist”. I’m getting mad finding a working RegEx to provide it to the “ignore” parameter. This RegEx should work ^(?!.*(dist|node_modules)).* but it doesn’t. Using this as “ignore” param I get no app folder at all - nothing gets copied. I couldn’t figure out what is used internally for the ignore match. Greetings (edit: maybe I have to build a script via the API to fit our project needs)