Just: add _if_not_on_ci_just helper, and add generation prerequisites

misc/just/lib.just

@@ -72,8 +72,16 @@ _run_in DIR +ARGS:
 _run_in_semmle_code +ARGS: _require_semmle_code (_run_in "$SEMMLE_CODE" ARGS)
 
 [no-cd, positional-arguments, no-exit-message]
-_just +ARGS:
+@_just +ARGS:
+    echo "-> just $@"
     "{{ JUST_EXECUTABLE }}" "$@"
 
+[no-cd, positional-arguments]
+@_if_not_on_ci_just +ARGS:
+    if [ "${GITHUB_ACTIONS:-}" != "true" ]; then \
+        echo "-> just $@"; \
+        "$JUST_EXECUTABLE" "$@"; \
+    fi
+
 [no-cd]
 _black *ARGS=".": (_run "uv" "run" "black" ARGS)

rust/justfile

@@ -2,7 +2,7 @@ import '../lib.just'
 
 install: (_bazel "run" "@codeql//rust:install")
 
-build: (_build_dist "rust")
+build: (_if_not_on_ci_just "generate" source_dir()) (_build_dist "rust")
 
 generate: (_bazel "run" "@codeql//rust/codegen")
 

rust/ql/integration-tests/justfile

@@ -1,8 +1,9 @@
-import "../../../misc/just/lib.just"
+
+import "../../../lib.just"
 
 
 [no-cd]
-test *ARGS=".": (_just "generate") (_integration_test ARGS)
+test *ARGS=".": (_if_not_on_ci_just "generate" source_dir()) (_integration_test ARGS)
 
 # TODO in separate PR
 # [no-cd]