json: ensure py/js schema conv tested on ubuntu-focal-make

.github/workflows/build.yml

@@ -135,6 +135,9 @@ jobs:
 
   ubuntu-focal-make:
     runs-on: ubuntu-20.04
+    env:
+      LLAMA_NODE_AVAILABLE: true
+      LLAMA_PYTHON_AVAILABLE: true
 
     steps:
       - name: Clone
@@ -147,6 +150,14 @@ jobs:
           sudo apt-get update
           sudo apt-get install build-essential gcc-8
 
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+
       - name: Build
         id: make_build
         env:

tests/test-json-schema-to-grammar.cpp

@@ -804,7 +804,7 @@ int main() {
         }
     });
 
-    if (std::system("python --version") == 0) {
+    if (getenv("LLAMA_PYTHON_AVAILABLE") || (std::system("python --version") == 0)) {
         test_all("Python", [](const TestCase & tc) {
             write("test-json-schema-input.tmp", tc.schema);
             tc.verify_status(std::system(
@@ -815,7 +815,7 @@ int main() {
         fprintf(stderr, "\033[33mWARNING: Python not found, skipping Python JSON schema -> grammar tests.\n\033[0m");
     }
 
-    if (std::system("node --version") == 0) {
+    if (getenv("LLAMA_NODE_AVAILABLE") || (std::system("node --version") == 0)) {
         test_all("JavaScript", [](const TestCase & tc) {
             write("test-json-schema-input.tmp", tc.schema);
             tc.verify_status(std::system(