Add script for performing compilation size regression investigations.

util/size_regression.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+if [[ -z $1 ]] ; then
+ echo "Usage: $0 planck/rev6:default"
+ exit 1
+fi
+
+keyboard_target=$1
+
+function build_executor() {
+ git rev-list --oneline --no-merges 0.11.0...upstream/develop ^upstream/master | while IFS= read -r line ; do
+ revision=$(echo $line | cut -d' ' -f1)
+
+ make distclean >/dev/null 2>&1
+ git checkout $revision >/dev/null 2>&1
+ make -j $keyboard_target >/dev/null 2>&1
+ file_size=$(arm-none-eabi-size .build/*.elf | awk '/elf/ {print $1}')
+
+ printf "%8d -- %s\n" "$file_size" "$line"
+ done
+}
+
+# The actual execution of all the builds needs to be the last command in the entire script
+# - During builds, this script file will disappear, so we need the entire script to be
+# loaded into the script interpreter at the time of execution. Do not refactor.
+build_executor