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Add docs on how to build wasp from source on M1/M2 macs #1431

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Add docs on how to build wasp from source on M1/M2 macs #1431

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27 changes: 26 additions & 1 deletion waspc/README.md
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Expand Up @@ -34,7 +34,32 @@ It can then also run that web app for you, deploy it (not yet but that is coming
### Setup
We use the [`cabal`](https://cabal.readthedocs.io/) command line tool to build
the project. The best way to install it is via
[ghcup](https://www.haskell.org/ghcup/). The `ghcup tui` terminal user interface
[ghcup](https://www.haskell.org/ghcup/) (if you're running an M1/M2 mac make sure to run it in rosetta).
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So what exactly do you have to run in rosetta -> ghcup, during installation, or cabal later when building the project, or both?

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You need to install ghcup and then I suppose also run cabal with rosetta (installing ghcup in m1 mode and then trying to run it or cabal didn't work)


<details>
<summary>M1/M2 rosetta setup</summary>

1. Regular Shell: just run `arch -x86_64 zsh` in your terminal.
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This uses rosetta for the current terminal session?

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Yup, without any permanent changes

2. IntelliJ: Preferences -> Tools -> Terminal -> Shell path -> `env /usr/bin/arch -x86_64 /bin/zsh --login`
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Are we ok with doing this for all of the shells that IntelliJ runs? Because this will then be also used when you are not dealing with Haskell, right? Same question for vscode below.

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This sets it per project (so only in this folder -> .idea is the config for it) and same for vscode (I suggested creating the .vscode/settings.json to make it local)

3. VSCode: add the following to your local `.vscode/settings.json` file

```json
{
"terminal.integrated.profiles.osx": {
"rosetta": {
"path": "/usr/bin/arch",
"args": ["-arch", "x86_64", "/bin/zsh"],
"overrideName": true
}
},
"terminal.integrated.defaultProfile.osx": "rosetta"
}
```

To check you can run `sysctl sysctl.proc_translated` and it should print out `sysctl.proc_translated: 1`
</details>

The `ghcup tui` terminal user interface
is a convenient way of installing and selecting versions of `cabal`, `hls` and
`ghc`.

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