find-installed-dotfiles

#!/usr/bin/env bash

if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
    echo 'Execute this file instead of sourcing it'
    return 1
fi

SOURCE="${BASH_SOURCE[0]}"
while [[ -L "$SOURCE" ]]; do
    DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
    SOURCE="$(readlink "$SOURCE")"
    [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"
done
DOTFILES_DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
cd "$DOTFILES_DIR" || { echo >&2 'Error finding dotfiles dir'; exit 1; }
export DOTFILES_DIR

export PRINT0=false
[[ "$1" = '-print0' ]] && export PRINT0=true

#find ~ -maxdepth 1 -type l -lname "${DOTFILES_DIR}/*" -print0
# -lname is not supported by busybox find, so use python
# use xargs to prevent too many arguments

find ~ -maxdepth 1 -type l -print0 | xargs -0 -n5 python -c '
import os
import sys
delimiter = "\0" if os.environ["PRINT0"] == "true" else "\n"
files = sys.argv[1:] # exclude -c flag
for file in files:
    if os.path.realpath(file).startswith(os.environ["DOTFILES_DIR"] + "/"):
        sys.stdout.write(file + delimiter)'

cat install-config.txt install-config.local.txt 2>/dev/null | sed -n 's/[^=]*= //p' | python -c '
import os
import sys
delimiter = "\0" if os.environ["PRINT0"] == "true" else "\n"
for line in sys.stdin:
    expanded_file = os.path.expanduser(line.strip())
    if os.path.islink(expanded_file) and os.path.realpath(expanded_file).startswith(os.environ["DOTFILES_DIR"] + "/"):
        sys.stdout.write(expanded_file + delimiter)'