Use vcpkg version pinning(ish)

.appveyor.yml

@@ -15,7 +15,7 @@ install:
   # Update vcpkg (is outdated on the VS 2015 image)
 - cmd: |
     cd "C:\Tools\vcpkg"
-    git pull
+    git pull -q
     .\bootstrap-vcpkg.bat
     cd %appveyor_build_folder%
 cache:
@@ -27,7 +27,7 @@ nuget:
   project_feed: true
   disable_publish_on_pr: true
 before_build:
- - cmd: vcpkg install zstd zlib openssl --triplet %arch%-windows
+ - cmd: vcpkg --feature-flags=versions install --triplet %arch%-windows
 build:
   project: win32/librdkafka.sln
   publish_nuget: true

packaging/RELEASE.md

@@ -98,9 +98,10 @@ Release candidates start at 200, thus 0xAABBCCc9 is RC1, 0xAABBCCca is RC2, etc.
 Change the `RD_KAFKA_VERSION` defines in both `src/rdkafka.h` and
 `src-cpp/rdkafkacpp.h` to the version to build, such as 0x000b01c9
 for v0.11.1-RC1, or 0x000b01ff for the final v0.11.1 release.
+Update the librdkafka version in `vcpkg.json`.
 
    # Update defines
-   $ $EDITOR src/rdkafka.h src-cpp/rdkafkacpp.h
+   $ $EDITOR src/rdkafka.h src-cpp/rdkafkacpp.h vcpkg.json
 
    # Reconfigure and build
    $ ./configure

vcpkg.json

@@ -0,0 +1,19 @@
+{
+    "name": "librdkafka",
+    "version": "1.8.0",
+    "dependencies": [
+        {
+            "name": "zstd",
+            "version>=": "1.4.9"
+        },
+        {
+            "name": "zlib",
+            "version>=": "1.2.11"
+        },
+        {
+            "name": "openssl",
+            "version>=": "1.1.1k"
+        }
+    ],
+    "builtin-baseline": "cf03dac5c25dd5a8d207d0b7d546f24424898418"
+}