Fix Windows CI (#1616)

Signed-off-by: Naveen Tatikonda <[email protected]>

.github/workflows/CI.yml

@@ -59,6 +59,15 @@ jobs:
       - name: Checkout k-NN
         uses: actions/checkout@v1
 
+      - name: Apply Git Patch
+        # Deleting file at the end to skip `git apply` inside CMAKE file
+        run: |
+          git submodule update --init -- jni/external/faiss
+          cd jni/external/faiss
+          git apply --ignore-space-change --ignore-whitespace --3way ../../patches/faiss/0001-Add-missing-headers-for-gcc.patch
+          rm ../../patches/faiss/0001-Add-missing-headers-for-gcc.patch
+        working-directory: ${{ github.workspace }}
+
       - name: Setup Java ${{ matrix.java }}
         uses: actions/setup-java@v1
         with:
@@ -76,6 +85,15 @@ jobs:
           Import-Module "$env:ChocolateyInstall\helpers\chocolateyProfile.psm1"
           refreshenv
 
+      - name: Install Zlib Using Scoop
+        run: |
+          echo "C:/Users/runneradmin/scoop/shims" >> $env:GITHUB_PATH
+          Import-Module "$env:ChocolateyInstall\helpers\chocolateyProfile.psm1"
+          refreshenv
+          scoop bucket add extras
+          scoop install zlib
+          regedit /s "C:\\Users\\runneradmin\\scoop\\apps\\zlib\\current\\register.reg"
+
       - name: Download OpenBLAS
         run: |
           curl -L -O https://github.com/xianyi/OpenBLAS/releases/download/v0.3.21/OpenBLAS-0.3.21-x64.zip

jni/include/jni_util.h

@@ -17,6 +17,7 @@
 #include <string>
 #include <vector>
 #include <unordered_map>
+#include <cstdint>
 
 namespace knn_jni {
 

jni/patches/faiss/0001-Add-missing-headers-for-gcc.patch

@@ -0,0 +1,26 @@
+diff --git a/faiss/Clustering.h b/faiss/Clustering.h
+index ef1f00ad..ae341115 100644
+--- a/faiss/Clustering.h
++++ b/faiss/Clustering.h
+@@ -10,7 +10,7 @@
+ #ifndef FAISS_CLUSTERING_H
+ #define FAISS_CLUSTERING_H
+ #include <faiss/Index.h>
+-
++#include <cstdint>
+ #include <vector>
+
+ namespace faiss {
+diff --git a/faiss/Index.h b/faiss/Index.h
+index 3d1bdb99..eaed1b14 100644
+--- a/faiss/Index.h
++++ b/faiss/Index.h
+@@ -16,6 +16,8 @@
+ #include <string>
+ #include <typeinfo>
+
++#include <cstdint>
++
+ #define FAISS_VERSION_MAJOR 1
+ #define FAISS_VERSION_MINOR 8
+ #define FAISS_VERSION_PATCH 0