1 files changed, 90 insertions, 0 deletions
diff --git a/circuitpython/py/genlast.py b/circuitpython/py/genlast.py
new file mode 100644
index 0000000..ad44745
--- /dev/null
+++ b/circuitpython/py/genlast.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+
+import sys
+import re
+import os
+import itertools
+from concurrent.futures import ProcessPoolExecutor
+import multiprocessing
+import threading
+import subprocess
+
+from makeqstrdefs import qstr_unescape, QSTRING_BLOCK_LIST
+
+re_line = re.compile(r"#[line]*\s(\d+)\s\"([^\"]+)\"", re.DOTALL)
+re_qstr = re.compile(r"MP_QSTR_[_a-zA-Z0-9]+", re.DOTALL)
+re_translate = re.compile(r"translate\(\"((?:(?=(\\?))\2.)*?)\"\)", re.DOTALL)
+
+
+def write_out(fname, output_dir, output):
+    if output:
+        for m, r in [("/", "__"), ("\\", "__"), (":", "@"), ("..", "@@")]:
+            fname = fname.replace(m, r)
+        with open(output_dir + "/" + fname + ".qstr", "w") as f:
+            f.write("\n".join(output) + "\n")
+
+
+def process_file(fname, output_dir, content):
+    content = content.decode("utf-8", errors="ignore")
+    output = []
+    for match in re_qstr.findall(content):
+        name = match.replace("MP_QSTR_", "")
+        if name not in QSTRING_BLOCK_LIST:
+            output.append("Q(" + qstr_unescape(name) + ")")
+    for match in re_translate.findall(content):
+        output.append('TRANSLATE("' + match[0] + '")')
+
+    write_out(fname, output_dir, output)
+
+
+def checkoutput1(args):
+    info = subprocess.run(args, check=True, stdout=subprocess.PIPE, input="")
+    return info.stdout
+
+
+def preprocess(command, output_dir, fn):
+    try:
+        output = checkoutput1(command + [fn])
+        process_file(fn, output_dir, output)
+    except Exception as e:
+        print(e, file=sys.stderr)
+        raise
+
+
+def maybe_preprocess(command, output_dir, fn):
+    # Preprocess the source file if it contains "MP_QSTR", "translate",
+    # or if it uses enum.h (which generates "MP_QSTR" strings.
+    if subprocess.call(["grep", "-lqE", r"(MP_QSTR|translate|enum\.h)", fn]) == 0:
+        preprocess(command, output_dir, fn)
+
+
+if __name__ == "__main__":
+
+    idx1 = sys.argv.index("--")
+    idx2 = sys.argv.index("--", idx1 + 1)
+    output_dir = sys.argv[1]
+    check = sys.argv[2:idx1]
+    always = sys.argv[idx1 + 1 : idx2]
+    command = sys.argv[idx2 + 1 :]
+
+    if not os.path.isdir(output_dir):
+        os.makedirs(output_dir)
+
+    # Mac and Windows use 'spawn'.  Uncomment this during testing to catch spawn-specific problems on Linux.
+    # multiprocessing.set_start_method("spawn")
+    executor = ProcessPoolExecutor(max_workers=multiprocessing.cpu_count() + 1)
+    results = []
+    try:
+        results.extend(
+            executor.map(
+                maybe_preprocess, itertools.repeat(command), itertools.repeat(output_dir), check
+            )
+        )
+        results.extend(
+            executor.map(
+                preprocess, itertools.repeat(command), itertools.repeat(output_dir), always
+            )
+        )
+    except subprocess.CalledProcessError:
+        raise SystemExit(1)
+    executor.shutdown()