fix: improve checking for Rez (fix #994)

[caass]

Check for Rez in Xcode.app and in command line tools, and error if neither is installed.

What kind of change does this PR introduce? (check at least one)
Fixes #994

• Bugfix
• Feature
• New Binding Issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes. Issue #___
• No

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix: #xxx[,#xxx], where "xxx" is the issue number)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:
I haven't tested this at all, this is just my naïve attempt to fix this behavior. Please let me know what I've done wrong and I'll correct it. ❤️

[caass]

There's no pretty error message telling folks to install command line tools for xcode, however I'm pretty sure that the error stack will make it pretty obvious with a single google search what the problem is. There's about a million Medium articles explaining how to run xcode-select --install.

[caass]

Ok so CI failed, but I'm not sure it was related to my change. Relevant output:

info sharp Downloading https://github.com/lovell/sharp-libvips/releases/download/v8.9.1/libvips-8.9.1-darwin-x64.tar.gz
ERR! sharp connect ETIMEDOUT 52.216.160.155:443
info sharp Attempting to build from source via node-gyp but this may fail due to the above error

I think this is just a network timeout. I've seen some stuff about this being an issue, I wonder if triggering a re-run will fix it.

[jbolda]

Could you do something like ${xcode-select --print-path || echo "Can't find Rez at $1, try installing via xcode-select --install"}? You might need to check my bash typing from my phone.

[jbolda]

Actually, you could add to the error message here:

tauri/cli/tauri-bundler/src/bundle/templates/dmg/dmg-license.py

Line 158 in 91dd7af

print('Failed to find Rez at "%s"!\n' % options.rez)

[jbolda]

Thanks again for your help with this!