Distribute as .zip instead of .dmg

[simonw]

https://twitter.com/tominsam/status/1432892683756867589 and https://daringfireball.net/2009/09/how_should_mac_apps_be_distributed

[simonw]

This is annoying: npm run dist seems to be producing a corrupt zip file:

dist % ls
Datasette-0.1.0-mac.zip		Datasette-0.1.0.dmg		Datasette-0.1.0.dmg.blockmap	builder-debug.yml		builder-effective-config.yaml	latest-mac.yml			mac
dist % unzip Datasette-0.1.0-mac.zip 
Archive:  Datasette-0.1.0-mac.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of Datasette-0.1.0-mac.zip or
        Datasette-0.1.0-mac.zip.zip, and cannot find Datasette-0.1.0-mac.zip.ZIP, period.

Bug reported here, but doesn't look like there's a workaround or fix: electron-userland/electron-builder#3779

[simonw]

Tried this instead:

cd dist/mac
zip -r Datasette.app.zip Datasette.app

But... du -h Datasette.app reports 274MB and ls -lah Datasette.app.zip reports 280MB, so the zip file is bigger not smaller!

[simonw]

I tried zip -r -9 Datasette.app.zip Datasette.app and got 279MB, still rubbish.

[simonw]

Well this is weird... right click in the Finder and "Compress Datasette.app" gets me a 118.9MB file:

[simonw]

This worked:

ditto -c -k --sequesterRsrc --keepParent Datasette.app Datasette.app.zip

Gave me a 113MB file. I found that recipe here: https://stackoverflow.com/a/2473201/6083

[simonw]

I'm going to try without these options:

     --sequesterRsrc
                   When creating a PKZip archive, preserve resource forks and HFS meta-data in the subdirectory
                   __MACOSX.  PKZip extraction will automatically find these resources.

     --keepParent  When creating an archive, embed the parent directory name src in dst_archive.

[simonw]

Annoyingly that produced a zip of a zip. https://github.com/actions/upload-artifact#zipped-artifact-downloads describes this. See also actions/upload-artifact#39

[simonw]

Removing --keepParent was a mistake.

[simonw]

This works well enough now.