Backport changes from renamed file

Question

I have two branches: trunk, production. I have found a problem in trunk, made fix and committed it, pushed it. Now it was tested and I need do merge changes into the product

Answer 1

I made a shell script that tries to do a cherry-pick while guessing file moves (it doesn't work if you renamed the file itself, only if you moved it to another folder): However: currently it will fail if the commit adds new files or if it itself rename files.

#!/bin/bash
#
# Attemps to guess file moves (rename of folders) when cherry-pick'ing.
# Gaspard van Koningsveld
#
[ "$1" == "" ] && echo "usage: $0 <commit-hash-to-cherry-pick>" && exit 1
TMP_PATCH_FILE="temp-cherry-pick-patch"
function abort() {
  echo "Aborting"
  "rm" -f "$TMP_PATCH_FILE"
  exit 1
}
function main() {
  echo "Retreiving commit patch..."
  "git" show "$1" > "$TMP_PATCH_FILE" || abort

  echo "Matching renamed files..."
  sedcmds=""
  for oldfile in $("grep" -E '(--- a|\+\+\+ b)' "$TMP_PATCH_FILE" | "cut" -c 7- | "sort" | "uniq"); do
    [ -f "$oldfile" ] && continue
    renamefound=0
    oldfilepart="$oldfile"
    while [ $renamefound -eq 0 ]; do
      possiblefiles=$("git" ls-files "**/$oldfilepart")
      if [ "$possiblefiles" != "" ]; then
        if [ $("wc" -l <<< "$possiblefiles") == "1" ]; then
          echo "  $oldfile > $possiblefiles"
          sedcmds="$sedcmds s|/$oldfile|/$possiblefiles|g;"
          break
        else
          echo "  ERROR: More than one rename possibility found for file $oldfile:"
          echo "$possiblefiles"
          abort
        fi
      fi
      prevoldfilepart="$oldfilepart"
      oldfilepart="${oldfilepart#*/}"
      if [ "$prevoldfilepart" == "$oldfilepart" ]; then
        echo "  ERROR: Could not find rename for $oldfile."
        abort
      fi
    done
  done
  echo "Renaming files in patch..."
  "sed" -i "$sedcmds" "$TMP_PATCH_FILE" || abort
  echo "Applying patch as new commit..."
  "sed" -i "s/^commit /From commit /;s/^Author: /From: /" "$TMP_PATCH_FILE" || abort
  "git" am -3 "$TMP_PATCH_FILE"

  "rm" -f "$TMP_PATCH_FILE"
}
main "$@"