Build script finding incorrect version of shasum

[techrah]

For Discussion

I'm currently building with RN 0.58.0-rc2 on macOS. I use brew and have installed the vim package which installs the perl dependency. I believe that perl then installs its own version of shasum which doesn't support the --portable switch.

I noticed the following output in my build output:

/bin/sh -c /Users/.../ios/build/Build/Intermediates.noindex/React.build/Debug-iphonesimulator/double-conversion.build/Script-190EE32F1E6A43DE00A8543A.sh

Unknown option: p

Type shasum -h for help

Unknown option: p

Type shasum -h for help

Unknown option: p

Type shasum -h for help

Unknown option: p

Type shasum -h for help

I believe this is caused by the code in ./node_modules/react-native/scripts/ios-install-third-parth.sh in which there are multiple calls to shasum -p. In my case, /usr/local/bin/shasum is being invoked instead of /usr/bin/shasum the latter which does support the p switch.

I was wondering how this might affect my build. It seems related to caching so I suspect that my build is OK but I'm just not not able to take advantage of caching. Is this the case?

Also, since it is fairly common for developers to use brew and many will also have vim installed, I was just wondering if this is something that the FB team was aware of and if there might be some suggestions on getting around this.

[itinance]

In my case i just renamed /usr/local/bin/shasum to another filename. Then the "right" shasum is used and the error is gone.