add tool to parse out firmware sizes for comparison

tools/fwsizes.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+# Run this from within an unzipped directory of build logs from github
+# to get a CSV file full of firmware sizes.  Super useful to compare sizes
+# from various builds.
+# Taken from https://github.com/adafruit/circuitpython/pull/4564#issuecomment-816655101
+import os, re
+
+for fn in os.listdir():
+    if os.path.isfile(fn) and ("build-arm " in fn or "build-riscv " in fn):
+        board = re.split("[()]", fn)[1]
+        if board in (
+            "spresense",
+            "teensy40",
+            "teensy41",
+            "feather_m7_1011",
+            "feather_mimxrt1011",
+            "feather_mimxrt1062",
+            "imxrt1010_evk",
+            "imxrt1020_evk",
+            "imxrt1060_evk",
+            "metro_m7_1011",
+        ):
+            continue
+        with open(fn, "r") as f:
+            head = "Build " + board + " for "
+            lines = iter(f)
+            for line in lines:
+                if head in line:
+                    tr = line.split(head)[1].split()[0]
+                    assert "make: Entering directory" in next(lines)
+                    assert "Use make V=1, make V=2" in next(lines)
+                    while re.search(
+                        r"\{\}|QSTR updated|FREEZE|\{'sku':|hex\tfilename|boot2.elf|Including User C Module from|Font missing|section `.bss' type changed to PROGBITS",
+                        next(lines),
+                    ):
+                        pass
+                    free = next(lines).split("bytes used, ")[1].split()[0]
+                    print(board + "," + tr + "," + free)