Ok I think this oughta do it! A bug we used to have was that, if you deployed 5 times in a row without changes to node_modules, then all 5 versions would reference `node_modules` from 6 deploys ago, which would then get "cleaned up". And so then the app would have all its deps disappear!
There's still a bug here, noted in the comments. That one sounds harder to solve, and suggests a refactor for how to do build caching more robustly, and… idk I think this cheat might just not be worth it. Idk! But I'm keeping it for the moment for convenience.
Okay so you know how in 3f07933f7a I switched the newline stuff here?
Yeah, right, I forgot, newlines are significant in bash :p I forgot this because I've never used them inside a `bash -c` invocation, but like, of course
Now, I'm still using `|` for clarity and reduced dependence on magic, but getting my lines right :p
I somehow had it in my head that `realpath` would crash if the file didn't exist, but that's super not true! It returns the tentative path for if you _were_ gonna create this!
Oops, I didn't understand the different multiline string formats in YAML! I was using one that chomped through newlines, and converted them to normal spaces.
I think that didn't matter in this context anyway? because indentation is an exception to this behavior. What a weird behavior!
Anyway, uhh, yeah, I'll use the simpler multiline string format now 😅 for consistency and clarity!
I was copying over an old create-react-app build folder, and the app was crashing remotely because there was no build!
Anyway woo it looks like the app is at least running now, `curl localhost:3000` shows results! >:3
I was sorting by version name, which _was_ reliable until I changed my version name format, and then a deploy cleaned up the version it had just deployed because it no longer sorted to the end!
Rather than be dependent on a stable version name format, and set myself up for more surprises, I'm going to instead use the folder's modified time. While there could be surprising ways for folder timestamps to be updated, I expect it to be _more_ reliable overall.
Huh, I was previously using ISO timestamps, but it turns out Yarn doesn't handle binary paths very reliably when your folder names contain colons 😳 so `canvas` was failing with `node-gyp not found`
I've documented it here in this self-answered StackOverflow question, so hopefully the next future person searching will find my answer! https://stackoverflow.com/q/69819597/107415
