Generates a list of partial diffs for https://reviewboard.mozilla.org/r/117282

generate-refactoring-diffs.sh

#!/usr/bin/env bash
# assumuing the file is in toolkit/componetsn/telemetry

TELEMETRY="Telemetry.cpp"

# Get the copy of Telemety
hg revert -r central $TELEMETRY

declare -A COMPARE_FILE_AREAS=(
  # Filename => from:to (Telemetry.cpp) | from:to (Filename)
  ["KeyedStackCapturer.cpp"]="427:610|15:164"
    ["KeyedStackCapturer.h"]="472:510|22:72"
      ["CombinedStacks.cpp"]="103:244|15:193"
        ["CombinedStacks.h"]="108:137|19:45"
         ["HangReports.cpp"]="246:425|12:153"
           ["HangReports.h"]="246:308|20:78"
)

mkdir -p /tmp/diffs/

for filename in $"${!COMPARE_FILE_AREAS[@]}"; do

  # Parse the line diff rage
  IFS='|' read range1 range2 <<< ${COMPARE_FILE_AREAS[$filename]}
  bash ./diff-lines.sh $range1@$TELEMETRY $range2@$filename > /tmp/diffs/$TELEMETRY-vs-$filename.diff

done