3rdparty: Disable tests and tools for ada

ada uses CPM: https://github.com/cpm-cmake/CPM.cmake

Disable git to prevent CPM from downloading 3rdparty repositories.
An intentional side effect is that tests and tools are not built.

Also add the license.

Signed-off-by: Ben Pope <ben@redpanda.com>

cmake/dependencies.cmake

@@ -108,6 +108,18 @@ FetchContent_Declare(
   SYSTEM
   SOURCE_SUBDIR crates/c-api)
 
+FetchContent_GetProperties(ada)
+if(NOT ada_POPULATED)
+  # Disable git to prevent CPM from downloading 3rdparty repositories.
+  # An intentional side effect is that tests and tools are not built
+
+  FetchContent_Populate(ada)
+  set(GIT_EXECUTABLE_OLD ${GIT_EXECUTABLE})
+  set(GIT_EXECUTABLE "" CACHE INTERNAL "Invalid path to the Git executable")
+  add_subdirectory(${ada_SOURCE_DIR} ${ada_BINARY_DIR})
+  set(GIT_EXECUTABLE ${GIT_EXECUTABLE_OLD} CACHE STRING "location of git" FORCE)
+endif()
+
 FetchContent_MakeAvailable(
     fmt
     rapidjson

licenses/third_party.md

@@ -9,6 +9,7 @@ please keep this up to date with every new library use.
 | software        | license                            |
 | :----------     | :------------                      |
 | abseil          | Apache License 2                   |
+| ada             | Apache License 2 / MIT             |
 | avro            | Apache License 2                   |
 | base64          | BSD 2                              |
 | boost libraries | Boost Software License Version 1.0 |