clean-password-store-sync-conflicts.sh

#!/bin/bash
# Clean out Syncthing *.sync-conflict-* files from Password Store
#
# Usage: Run the script from anywhere with no parameters.
#
# The script will remove all conflict files in `~/.password-store` for which
# the plaintext contents of the original file and the conflict file have the
# same SHA256 checksum. I.e. if `foo.sync-conflict-20151115-205258.gpg` and
# `foo.gpg` have the same checksums after decrypting, then the former will be
# removed.
#
# Author: Emil Lundberg <lundberg.emil@gmail.com>
# This is free and unencumbered software released into the public domain.
# For more information, please refer to <http://unlicense.org/>

TMPDIR=$(mktemp -d)

echo "Working with TMPDIR=$TMPDIR"

for conflict_fname in $(find ~/.password-store -type f -name '*.sync-conflict-*.gpg'); do
  fname="${conflict_fname%.sync-conflict-*.gpg}.gpg"

  bname=$(basename "$fname")
  decrypted_file="$TMPDIR/$bname"
  checksum_file="$TMPDIR/$bname.sha256sum"

  gpg -q -d "$conflict_fname" | sha256sum > "$checksum_file"
  sed -i "s#-\$#${decrypted_file}#" "$checksum_file"

  gpg -q -d "$fname" > "$decrypted_file"

  if sha256sum -c "$checksum_file" &>/dev/null; then
    echo "Removing $conflict_fname"
    rm "$conflict_fname"
  else
    echo "File ${conflict_fname} differs from ${fname}"
  fi
done

shred -u "$TMPDIR"/*
rmdir "$TMPDIR"