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Fix arm64 darwin install (#789)

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* fix: workaround for lies from uname -m

On an arm64 mac, `uname -m` returns x86_64 which causes install script to install with the wrong architecture

* refactor: use same logic from rustup

* Tweak credit comment

* Prod ci

---------

Co-authored-by: oz <otech47@gmail.com>
This commit is contained in:
Ana Hobden 2024-01-03 12:00:51 -08:00 committed by GitHub
parent 0b0172547c
commit e815280881
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1 changed files with 25 additions and 5 deletions
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30
nix-installer.sh
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@ -11,7 +11,7 @@
# It runs on Unix shells like {a,ba,da,k,z}sh. It uses the common `local`
# extension. Note: Most shells limit `local` to 1 var per line, contra bash.
# This script is based off https://github.com/rust-lang/rustup/blob/8f6b53628ad996ad86f9c6225fa500cddf860905/rustup-init.sh
# This script is based off https://github.com/rust-lang/rustup/blob/f8d7b3baba7a63237cb2b82ef49a68a37dd0633c/rustup-init.sh
if [ "$KSH_VERSION" = 'Version JM 93t+ 2010-03-05' ]; then
# The version of ksh93 that ships with many illumos systems does not
@ -143,10 +143,30 @@ get_architecture() {
fi
fi
if [ "$_ostype" = Darwin ] && [ "$_cputype" = i386 ]; then
# Darwin `uname -m` lies
if sysctl hw.optional.x86_64 | grep -q ': 1'; then
_cputype=x86_64
if [ "$_ostype" = Darwin ]; then
# Darwin `uname -m` can lie due to Rosetta shenanigans. If you manage to
# invoke a native shell binary and then a native uname binary, you can
# get the real answer, but that's hard to ensure, so instead we use
# `sysctl` (which doesn't lie) to check for the actual architecture.
if [ "$_cputype" = i386 ]; then
# Handling i386 compatibility mode in older macOS versions (<10.15)
# running on x86_64-based Macs.
# Starting from 10.15, macOS explicitly bans all i386 binaries from running.
# See: <https://support.apple.com/en-us/HT208436>
# Avoid `sysctl: unknown oid` stderr output and/or non-zero exit code.
if sysctl hw.optional.x86_64 2> /dev/null || true | grep -q ': 1'; then
_cputype=x86_64
fi
elif [ "$_cputype" = x86_64 ]; then
# Handling x86-64 compatibility mode (a.k.a. Rosetta 2)
# in newer macOS versions (>=11) running on arm64-based Macs.
# Rosetta 2 is built exclusively for x86-64 and cannot run i386 binaries.
# Avoid `sysctl: unknown oid` stderr output and/or non-zero exit code.
if sysctl hw.optional.arm64 2> /dev/null || true | grep -q ': 1'; then
_cputype=arm64
fi
fi
fi