Make fpp-to-json opt-in by default

.github/workflows/build-test-rhel8.yml

@@ -24,7 +24,7 @@
   Framework:
     runs-on: ubuntu-latest
     container:
       image: redhat/ubi8:8.10
     steps:
     - name: "Install dependencies"
       run: |
@@ -38,7 +38,7 @@
     - uses: ./.github/actions/setup
     - name: Build Framework
       run: |
-        fprime-util generate
+        fprime-util generate -DFPRIME_ENABLE_JSON_MODEL_GENERATION=ON
         fprime-util build --all -j4
 
   Ref:
@@ -59,7 +59,7 @@
     - name: Build Ref
       run: |
         cd Ref
-        fprime-util generate
+        fprime-util generate -DFPRIME_ENABLE_JSON_MODEL_GENERATION=ON
         fprime-util build -j4
 
   UTs:

.github/workflows/fpp-tests.yml

@@ -33,7 +33,7 @@ jobs:
       - name: "Generate UT build cache"
         working-directory: ./FppTestProject
         run: |
-          fprime-util generate --ut
+          fprime-util generate --ut -DFPRIME_ENABLE_JSON_MODEL_GENERATION=ON
         shell: bash
       - name: "Build UTs"
         working-directory: ./FppTestProject/FppTest

.github/workflows/fpp-to-json.yml

@@ -30,7 +30,7 @@ jobs:
       - name: "Generate Ref Deployment"
         working-directory: ./Ref
         run: |
-          fprime-util generate
+          fprime-util generate -DFPRIME_ENABLE_JSON_MODEL_GENERATION=ON
         shell: bash
       - name: "Run fpp-to-json on Ref topology"
         working-directory: ./Ref/Top

cmake/FPrime.cmake

@@ -160,7 +160,12 @@ macro(fprime_initialize_build_system)
 
     # Perform necessary sub-builds
     if (NOT FPRIME_IS_SUB_BUILD)
-        run_sub_build(info-cache target/sub-build/fpp_locs target/sub-build/fpp_depend target/sub-build/fpp_to_json target/sub-build/module_info)
+        set(SUB_BUILD_TARGETS target/sub-build/fpp_locs target/sub-build/fpp_depend)
+        if (FPRIME_ENABLE_JSON_MODEL_GENERATION)
+            list(APPEND SUB_BUILD_TARGETS target/sub-build/fpp_to_json)
+        endif()
+        list(APPEND SUB_BUILD_TARGETS target/sub-build/module_info)
+        run_sub_build(info-cache ${SUB_BUILD_TARGETS})
         # Import the pre-computed properties!
         include("${CMAKE_BINARY_DIR}/fprime_module_info.cmake")
     endif()

cmake/options.cmake

@@ -148,7 +148,7 @@ option(FPRIME_ENABLE_AUTOCODER_UTS "Enable autocoder UT generation" OFF)
 option(FPRIME_ENABLE_UT_COVERAGE "Calculate unit test coverage" ON)
 
 ####
-# `FPRIME_ENABLE_TEXT_LOGGERS:`
+# `FPRIME_ENABLE_TEXT_LOGGERS`:
 #
 # When FPRIME_ENABLE_TEXT_LOGGERS is set, the ActiveTextLogger and PassiveConsoleTextLogger 
 # svc components are included in the build. When unset, those components are excluded, 
@@ -163,6 +163,20 @@ option(FPRIME_ENABLE_UT_COVERAGE "Calculate unit test coverage" ON)
 ####
 option(FPRIME_ENABLE_TEXT_LOGGERS "Enable text loggers in build" ON)
 
+####
+# `FPRIME_ENABLE_JSON_MODEL_GENERATION`:
+#
+# Turns on the generation of JSON models for all modules in the build system. This will run `fpp-to-json` and may
+# require the user to install `java` and the .jar variants of FPP.
+#
+# **Values:**
+# - ON: enable JSON model generation
+# - OFF: (default) disable JSON model generation
+#
+# e.g. `-DFPRIME_ENABLE_JSON_MODEL_GENERATION=ON`
+####
+option(FPRIME_ENABLE_JSON_MODEL_GENERATION "Enable JSON model generation" OFF)
+
 ####
 # `FPRIME_SKIP_TOOLS_VERSION_CHECK`:
 #