fix-mtime

#!/bin/sh
# Files stored in or extracted from a Git repository can have indeterminate
#   file modified timestamps, which throws off Make.  Given the age of the
#   original project releases, some files do not re-autogenerate the same
#   as they originally did, causing errors.  Fixing the timestamps aims to
#   prevent this issue.

# Variable declarations and initializations
SCRIPT_FULL_PATH=$(realpath -s $0)
SCRIPT_DIR=$(dirname $SCRIPT_FULL_PATH)

echo "Preparing to fix timestamps, which could take several minutes."

(
  cd $SCRIPT_DIR && \
  git restore-mtime 2> /dev/null && \
  echo "Completed fixing of file modified timestamps using \"git restore-mtime\""
) || (
  # Cache the timestamp to use as standard
  STANDARDIZED_TIMESTAMP=$(date --reference=$SCRIPT_FULL_PATH +%Y%m%d%H%M) && \
  cd $SCRIPT_DIR/src-projects && \
  for dir in */ ; do
    echo -n "Processing directory $(basename $dir)..." ;
    find "$dir" -depth -type f -exec touch --no-create -t $STANDARDIZED_TIMESTAMP {} \;
    #find "$dir" -depth -type f -exec echo "File: {}" \; -exec touch --no-create -t $STANDARDIZED_TIMESTAMP {} \;
	echo "done."
  done && \
  echo "Completed setting of file modified timestamps to match a standard reference"
) || (
  echo -e "\nError while attempting to fix file modification times: No timestamps updated." && \
  exit 1
)