adding the trace-compile option to the julia initialization

src/julia/options.py

@@ -145,6 +145,9 @@ def yes_no_etc(*etc):
 
 threads: {int, 'auto'}
     How many threads to use.
+
+trace_compile: str
+    Trace precompile statements during execution to the given file.
 """
 
 
@@ -174,6 +177,7 @@ class JuliaOptions(object):
     inline = Choices("inline", yes_no_etc())
     check_bounds = Choices("check_bounds", yes_no_etc())
     threads = IntEtc("threads", etc={"auto"})
+    trace_compile = String("trace_compile")
 
     def __init__(self, **kwargs):
         unsupported = []

src/julia/tests/test_trace_compile.py

@@ -0,0 +1,31 @@
+import re
+from pathlib import Path
+
+from .test_compatible_exe import runcode
+from .utils import skip_in_windows
+
+
+@skip_in_windows
+def test_trace_file_created(tmpdir):
+    trace_compile_path = Path(tmpdir) / "trace_compile.jl"
+    runcode(
+        f"""
+    from julia.api import Julia
+    jl = Julia(trace_compile="{trace_compile_path}")
+
+    from julia import Main
+    Main.sin(2.0)
+    """.format(
+            str(trace_compile_path)
+        )
+    )
+    assert (trace_compile_path).exists()
+    assert len(trace_compile_path.read_text().strip()) > 0
+
+    # check whether the sin precompilation directive is included in the file
+    trace_compile_content = Path(trace_compile_path).read_text().strip()
+    lines = [x for x in trace_compile_content.split("\n") if len(x) > 0]
+    expected_precompile_line = (
+        r"precompile\(Tuple\{typeof\([A-Za-z]+\.sin\), Float64\}\)"
+    )
+    assert any([re.match(expected_precompile_line, x) is not None for x in lines])