urfiles

Introduction

urfiles creates a searchable database of files and file attributes.

Tape archive file format

Tape archive files are stored in a directory of the same name as the label on the tape. This name is stored in the ARCHIVE environment variable in the examples below.

Two files are read from this directory, md5sum.txt and stat.txt.

md5sum.txt

This file contains the output of md5sum for each file on the tape. It is produced with the following commands:

find $ARCHIVE -type f -print0 | xargs -0 -L10 -P72 md5sum > md5sum.tmp
sort < md5sum.tmp > $ARCHIVE/md5sum.txt
rm md5sum.tmp

stat.txt

This file contains the output of the stat command for each file on the tape. It is produced with the following commands:

find $ARCHIVE -type f -print0 | xargs -0 -L10 -P72 \
  stat --format='%n %1.1F %a %s %u %g %Y %y' > stat.tmp
sort < stat.tmp > $ARCHIVE/stat.txt
rm stat.tmp

Of note, this isn't a particularly good format for automatic parsing since the file name comes first and may contain spaces (i.e., it would have been better to start each line with fields that cannot contain spaces, and perhaps have the filename at the end).

activate and deactivate

I use the following zsh macros:

activate () {
    export VIRTUAL_ENV="$(pwd -P)"
    _OLD_VIRTUAL_PATH="$PATH"
    PATH="$VIRTUAL_ENV/bin:$PATH"
    hash -r
    _OLD_VIRTUAL_PROMPT="$PROMPT"
    PROMPT="%{%B%F{cyan}%}py:$(basename $VIRTUAL_ENV)%{%f%b%} $PROMPT"
}

deactivate () {
    if [ -n "$_OLD_VIRTUAL_PATH" ]
    then
            PATH="$_OLD_VIRTUAL_PATH"
            unset _OLD_VIRTUAL_PATH
    fi
    hash -r
    if [ -n "$_OLD_VIRTUAL_PROMPT" ]
    then
            PS1="$_OLD_VIRTUAL_PROMPT"
            unset _OLD_VIRTUAL_PROMPT
    fi
    unset VIRTUAL_ENV
    unset PYTHONHOME
    unset PYTHONPATH
}