A command line utility to find files, directories and archive entries by
various criteria, and optionally execute some actions.

Usage
=====

  zzfind [ <option> ] ... <file-or-dir> ... [ <expression> ]
      Apply "<expression>" to "<file-or-dir> ..." and all nested directory
      members, archive entries and compressed files.
File name "-" stands for STDIN.

Options
=======

  --help
      Print this text and terminate.
  --look-into <format-glob>:<path-glob>
      Look into compressed and archive contents if the format and the path
      match the globs. The default is to look into any recognised archive or
      compressed contents.
      Supported archive formats in this runtime configuration are:
      ${archive.formats}
      Supported compression formats in this runtime configuration are:
      ${compression.formats}
  --depth
  --descendants-first
      Process each directory's contents before the directory itself, and each
      archive's entries before the archive itself, and each compressed contents
      before the enclosing file or archive entry.
  --min-depth <levels>
      Do not apply any tests or actions at levels less than <levels>. E.g. "1"
      means "process all files except the top level files".
  --max-depth <levels>
      Descend at most <levels> of directories below the top level files and
      directories. "0" means "only apply the tests and actions to the top level
      files and directories".
      If in doubt, try:
      zzfind ... -print -echo ${depth}
  --7z-input-file-password <value>
      Password to decrypt password-protected 7ZIP input files.
  --nowarn
      Suppress all messages except errors.
  --quiet
      Suppress normal output.
  --verbose
      Print verbose messages.
  --debug
      Print verbose and debug messages.
  --log <level>:<logger>:<handler>:<formatter>:<format>
      Add logging at level FINE on logger "de.unkrig" to STDERR using the
      "FormatFormatter" and "SIMPLE" format, or the given arguments, which are
      all optional.
  -zip
  -zz
  -nested-zip
  -z
      (These are no longer supported; use "--look-into" instead.)

Expressions
===========

Expressions evaluate to a boolean value. An expression is either a test, or an
action (a test with side effects), or a combination of multiple subexpressions
through operators.

Tests
-----

  -name <glob>
      Name matches "<glob>" (see below).
  -path <glob>
      The full path (e.g. "dir/file.zip!dir/file.zip!dir/file" or "dir/file")
      matches "<glob>" (see below).
  -type <glob>
      Whether the type matches the <glob>. See the "type" property, described
      below. If you are unsure about types, run zzfind with -echo "${type}
      ${path}" first.
  -readable
      Whether this file is readable.
  -writable
      Whether this file is writable.
  -executable
      Whether this file is executable.
  -size <N>
  -size -<N>
  -size +<N>
      Whether the size is exactly/less than/more than <N> (e.g. "100", "-1K",
      "+10M").
  -mtime <N>
  -mtime +<N>
  -mtime -<N>
      Whether this file/archive entry was last modified (exactly/more than/less
      than) <N> days ago (N=0: 0...24h, N=1: 24...48h, ...).
  -mmin <N>
  -mmin +<N>
  -mmin -<N>
      Whether this file/archive entry was last modified (exactly/more than/less
      than) <N> minutes ago (N=0: 0...59sec, N=1: 60...119sec, ...).

Actions
-------

  -print
      Print file path and return true.
  -echo <message>
      Print the <message> and return true. All occurrences of "${<property-
      name>}" in the <message> are replaced with the value of the property. For
      the list of supported properties, see section "Properties of files and
      archive entries", below.
  -printf <format> <expr> ... ;
      Generate a message, print it, and return true. The <format> is the same
      as for Java's java.util.Formatter, and the <expr>essions support a Java-
      like syntax and can use all properties. For the list of supported
      properties, see section "Properties of files and archive entries", below.
      Example:
        -printf
        '%c%c%c%c %10d %6$tF %6$tT %7$s'
        "type == 'directory' ? 'd' : type =* 'archive-*' ? 'a' : type ==
        'directory-entry' ? 'D' : '-'"
        "readable ? 'r' : '-'"
        "writable ? 'w' : '-'"
        "executable ? 'x' : '-'"
        size
        lastModifiedDate
        path
        ;
      is equivalent with "-ls".
  -ls
      Print file type (one of "daD-"), readability, writability, executability,
      size, modification time and path, and return true. The size is zero for
      directories and directory entries, and -1 if unknown (e.g. for archive
      streams).
  -exec <word>... ;
      Execute "<word>..." as an external command; "{}" is replaced with the
      current file's path (which may contain "!" and would then NOT denote a
      physical file in the file system).
  -pipe <word>... ;
      Copy the file contents to the standard input of an external command
      "<word>..."; "{}" is replaced with the current file's path (which may
      contain "!" and would then NOT denote a physical file in the file
      system).
  -cat
      Print file contents and return true.
  -copy [ --mkdirs | -p ]  <tofile>
      Copy file contents to the named file. All occurrences of "${<property-
      name>}" in the <tofile> are replaced with the value of the property. For
      the list of supported properties, see section "Properties of files and
      archive entries", below.
      --mkdirs (or -p) silently create any missing directory.
  -disassemble [ -verbose ] [ -sourceDirectory <dir> ] [ -hideLines ] [ -
  hideVars ] [ -symbolicLabels ] [ -toFile <file> ]
      Disassembles a Java class file (by default to STDOUT).
  -java-class-file <expr>
      Parses the Java class file, evaluates the given expression (where
      parameter "cf" represents the de.unkrig.jdisasm.ClassFile) and prints the
      result on stdout
  -digest <algorithm>
      Calculate a "message digest" of the contents, print it and return true.
      Algorithms available in this environment are: ${digest.providers}
  -checksum CRC32|ADLER32
      Calculate a checksum of the contents, print it and return true.
  -true
      Return true.
  -false
      Return false.
  -prune
      Return true. If the file is a directory, do not descend into it.
  -delete
      Delete file; returns true if removal succeeded. If the removal failed, an
      error message is issued. If you want to delete <directories>, also
      configure the --descendants-first option, for otherwise the directory is
      first deleted, and then traversed, which cannot possibly work.
If no action is given, then "-print" is implicitly added.

Operators
---------

(In descending precedence.)
  ( <exp> )
      Whether <exp> is true.
  -not <exp>
  ! <exp>
      Whether <exp> is false.
  <exp1> -a <exp2>
  <exp1> -and <exp2>
  <exp1> '&&' <exp2>
  <exp1> <exp2>
      Whether both <exp1> and <exp2> are true. <exp2> is not evaluated if
      <exp1> is false.
  <exp1> -o <exp2>
  <exp1> -or <exp2>
  <exp1> '||' <exp2>
      Whether <exp1> or <exp2> is true. <exp2> is not evaluated if <exp1> is
      true.
  <exp1> , <exp2>
      Evaluates both expressions and returns the result of <exp2>.

Properties of files and archive entries
---------------------------------------

Various tests and actions (e.g. "-echo") have access to a set of "variabales"
related to the current file or archive entry.
  "archiveFormat":
      For types "archive-contents", "archive-file" and "archive-xxx-resource":
      The format.
      For types "normal-contents", "compressed-contents" and "directory-entry":
      The format of the immediately enclosing archive.
      For all other types: Empty.
  "compressionFormat":
      For types "compressed-contents", "compressed-file" and "compressed-xxx-
      resource": The format.
      For type "normal-contents", "compressed-contents" and "directory-entry":
      The format of the immediately enclosing compressed contents.
      For all other types: Empty.
  "compressionMethod":
      For archive entries: The compression method that was used. Only some of
      the archive formats provide this information, namely "zip" and "7z".
  "crc":
      For types "normal-contents" and "normal-file": The CRC32 checksum of the
      contents.
      For all other types: Empty.
  "depth":
      Zero for the files/directories specified on the command line, +1 for
      files/directories in a subdirectory, +1 for compressed content, and +1
      for the entries of archive files.
  "file":
      For types "archive-file", "compressed-file", "directory" and "normal-
      file": The java.util.File object related to the current file or directory
      entry. It has the following properties, which can be addressed like
      file.name: canExecute, canRead, canWrite, exists, absoluteFile,
      absolutePath, canonicalFile, canonicalPath, name, parent, parentFile,
      path, isDirectory, isFile, isHidden, lastModified, length, toURI.
  "lastModified" (milliseconds since 1970),
  "lastModifiedDate" (Date object):
      For types "archive-file", "compressed-file", "directory" and "normal-
      file": The date and time of the last modification of the file.
      For types "archive-xxx-resource", "compressed-xxx-resource" and "normal-
      xxx-resource": The the modification time of the addressed resource.
      For types "archive-contents", "compressed-contents", "directory-entry"
      and "normal-contents": The the modification time stored in the archive
      entry.
  "name":
      The last component of a directory or file name, or the name of an archive
      entry (which may contain slashes!).
  "path":
      The path to the resources as it was found, starting with the <file-or-
      dir> on the command line. "!" indicates an archive, "%" a compressed
      file.
  "size":
      The size, in bytes, for types "archive", "archive-file", "archive-xxx-
      resource", "compressed-contents", "compressed-file", "compressed-xxx-
      resource", "file" or "normal-contents", -1 for type "directory-entry",
      and 0 for type "directory".
  "type":
      The "type" of the current subject; the actual types are:
        directory
            A directory
        normal-file
            A plain file
        normal-contents
            Plain content in an archive or a compressed file
        normal-xxx-resource (e.g. xxx="http")
            Plain content addressed by a URL
        archive-file
            An archive file
        archive-contents
            A nested archive
        archive-xxx-resource (e.g. xxx="http")
            An archive addressed by a URL
        compressed-file
            A compressed file
        compressed-contents
            Nested compressed content
        compressed-xxx-resource (e.g. xxx="http")
            Compressed content addressed by a URL
        directory-entry
            A "directory entry" in an archive.
  "url":
      For types "normal-xxx-resource", "archive-xxx-resource" and "compressed-
      xxx-resource": The URL that addresses the resource.

Example <glob>s
===============

  dir/file
      File "file" in directory "dir"
  file.gz%
      Compressed file "file.gz"
  file.zip!dir/file
      Entry "dir/file" in archive file "dir/file.zip"
  file.tar.gz%!dir/file
      Entry "dir/file" in the compressed archive file "file.tar.gz"
  */x
      File "x" in an immediate subdirectory
  **/x
      File "x" in any subdirectory
  ***/x
      File "x" in any subdirectory, or any entry "**/x" in any archive file in
      any subdirectory
  a,dir/file.7z!dir/b
      File "a" and entry "dir/b" in archive file "dir/file.7z"
  ~*.c
      Files that don't end with ".c"
  ~*.c~*.h
      Files that don't end with ".c" or ".h"
  ~*.c~*.h,foo.c
      "foo.c" plus all files that don't end with ".c" or ".h"