# Print tab-separated details for the given file based on the package that owns it
# Usage:
#  awk -v file=/path/to/some/file -f find.awk /lib/apk/db/installed

BEGIN {
    # multi-line records, go!
    RS=""
    # our input fields are lines, but our output is tab-delimited
    OFS="\t"

    # This is a big long ugly chunk of string manipulation to basically split "/usr/bin/ls" in to ["usr/bin", "ls"]
    # There are easier ways to do this in other languages, but I'm not sure if that's the case for awk :-(
    ofile = file
    while (file ~ /^\//)
        file = substr(file, 2)
    p = split(file, parts, "/")
    dirname = ""
    for (i = 0; i <= p; i++) {
        if (parts[i] ~ /^\s*$/)
            continue
        if (i == p)
            filename = parts[i]
        else
            dirname = dirname "/" parts[i]
    }
    dirname = substr(dirname, 2)
    # the trailing \\n is so we do an exact match on the path
    # otherwise /usr/bin/foo will match /usr/bin/foobar and /usr/binaries/foo
    # This is a side effect of how the package files are recorded in the APK db
    dirpat = "F:" dirname "\\n"
    filepat = "R:" filename "\\n"
}

# match any record that has both the directory and filename listed for it
$0 ~ dirpat && $0 ~ filepat {
    for (i = 0; i < NF; i++)
        f[substr($i, 0, 1)] = substr($i, 3)
    print f["P"], f["V"], f["U"], f["L"], ofile
}