Can't build the SDK using the .sh files?

[Whyser]

Hello, as the topic says, how am I to use the .sh files to build the project?

I tried executing the files in a Git Shell, by doing: sh ./scripts/setup.sh and it will execute but i will receive the following output/errors (sorry for bad formatting, see below).

It complains about local.properties not existing, also that it can't find ./gradlew. I'm not well-versed in this stuff, any help is appreciated. (I've installed gradle-3.1 and put it in the path variable. gradle -v works)

D:\GitHub\facebook-sdk-for-unity [tmp-test-bashscripts]> sh .\scripts\setup.sh
/d/GitHub/facebook-sdk-for-unity/scripts/local.properties: line 1: sdk.dir=D:\Android\android-sdk\sdk: No such file or directory
sed: can't read /FacebookSdkVersion.cs: No such file or directory
.\scripts\setup.sh: line 25: buildAndCopyCore: command not found
.\scripts\setup.sh: line 26: buildAndCopyPlatformDLLs: command not found
/d/GitHub/facebook-sdk-for-unity/scripts/local.properties: line 1: sdk.dir=D:\Android\android-sdk\sdk: No such file or directory
sed: can't read /FacebookSdkVersion.cs: No such file or directory
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 75.1M 100 75.1M 0 0 359k 0 0:03:33 0:03:33 --:--:-- 372k
/d/GitHub/facebook-sdk-for-unity/scripts/local.properties: line 1: sdk.dir=D:\Android\android-sdk\sdk: No such file or directory
sed: can't read /FacebookSdkVersion.cs: No such file or directory
\033[0;36mStarting build \033[0m
\033[0;36mStep 1 - Cleaning wrapper libs folder \033[0m
/d/GitHub/facebook-sdk-for-unity/facebook-android-wrapper/libs /d/GitHub/facebook-sdk-for-unity
find: warning: you have specified the -maxdepth option after a non-option argument !, but options are not positional (-maxdepth affects tests specified before it as well as those specified after it). Please specify options before other arguments.

/d/GitHub/facebook-sdk-for-unity
\033[0;36mStep 2 - Get depenancies for android wrapper \033[0m
\033[0;36mStep 2.1.0 - Download bolts-android-1.4.0.jar \033[0m
\033[0;36mbolts-android-1.4.0.jar already exists. Skipping download. \033[0m
\033[0;36mStep 2.1.1 - Download bolts-tasks-1.4.0.jar \033[0m
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 178 100 178 0 0 546 0 --:--:-- --:--:-- --:--:-- 642
100 190 100 190 0 0 212 0 --:--:-- --:--:-- --:--:-- 690
100 38092 100 38092 0 0 28892 0 0:00:01 0:00:01 --:--:-- 28892
\033[0;36mStep 2.1.2 - Download bolts-applinks-1.4.0.jar \033[0m
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 178 100 178 0 0 650 0 --:--:-- --:--:-- --:--:-- 661
100 196 100 196 0 0 233 0 --:--:-- --:--:-- --:--:-- 233
100 25020 100 25020 0 0 20337 0 0:00:01 0:00:01 --:--:-- 228k
\033[0;36mStep 2.2 - Download facebook-android-sdk-4.14.0.aar \033[0m
\033[0;36mfacebook-android-sdk-4.14.0.aar already exists. Skipping download \033[0m
\033[0;36mStep 2.3 - Coping support lib \033[0m
\033[0;36mStep 3 - Build android wrapper \033[0m
/d/GitHub/facebook-sdk-for-unity/facebook-android-wrapper /d/GitHub/facebook-sdk-for-unity
/d/GitHub/facebook-sdk-for-unity/scripts/setup_android_unity_plugin.sh: line 118: ./gradlew: No such file or directory

\033[0;31mFATAL: Failed to perform gradle clean \033[0m

\033[0;31mFATAL: Failed to build the android sdk plugin \033[0m