[PATCH v2 4/4] cmake(install): include vcpkg dlls

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From: Dennis Ameling <dennis@xxxxxxxxxxxxxxxxx>

Our CMake configuration generates not only build definitions, but also
install definitions: After building Git using `msbuild git.sln`, the
built artifacts can be installed via `msbuild INSTALL.vcxproj`.

To specify _where_ the files should be installed, the
`-DCMAKE_INSTALL_PREFIX=<path>` option can be used when running CMake.

However, this process would really only install the files that were just
built. On Windows, we need more than that: We also need the `.dll` files
of the dependencies (such as libcurl). The `vcpkg` ecosystem, which we
use to obtain those dependencies, can be asked to install said `.dll`
files really easily, so let's do that.

This requires more than just the built `vcpkg` artifacts in the CI build
definition; We now clone the `vcpkg` repository so that the relevant
CMake scripts are available, in particular the ones related to defining
the toolchain.

Signed-off-by: Dennis Ameling <dennis@xxxxxxxxxxxxxxxxx>
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 .github/workflows/main.yml          | 5 +++++
 contrib/buildsystems/CMakeLists.txt | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f6885e88ee6b..c13afe2bf058 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -186,6 +186,11 @@ jobs:
         ## Unzip and remove the artifact
         unzip artifacts.zip
         rm artifacts.zip
+    - name: initialize vcpkg
+      uses: actions/checkout@v2
+      with:
+        repository: 'microsoft/vcpkg'
+        path: 'compat/vcbuild/vcpkg'
     - name: download vcpkg artifacts
       shell: powershell
       run: |
diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index 3b94b5f62109..485c7662dc58 100644
--- a/contrib/buildsystems/CMakeLists.txt
+++ b/contrib/buildsystems/CMakeLists.txt
@@ -58,6 +58,10 @@ if(WIN32)
 
 	# In the vcpkg edition, we need this to be able to link to libcurl
 	set(CURL_NO_CURL_CMAKE ON)
+
+	# Copy the necessary vcpkg DLLs (like iconv) to the install dir
+	set(X_VCPKG_APPLOCAL_DEPS_INSTALL ON)
+	set(CMAKE_TOOLCHAIN_FILE ${VCPKG_DIR}/scripts/buildsystems/vcpkg.cmake CACHE STRING "Vcpkg toolchain file")
 endif()
 
 find_program(SH_EXE sh PATHS "C:/Program Files/Git/bin")
-- 
gitgitgadget



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