Provided by: diffoscope-minimal_224ubuntu3_all bug


       diffoscope - in-depth comparison of files, archives, and directories


       diffoscope --help
       diffoscope [OPTIONS] [--json output_diff] path1 path2
       diffoscope [OPTIONS] diff
       diffoscope [OPTIONS] < diff

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       diffoscope  will try to get to the bottom of what makes files or directories different. It
       will recursively unpack archives of many kinds and transform various binary  formats  into
       more  human-readable form to compare them. It can compare two tarballs, ISO images, or PDF
       just as easily.

       It can be scripted through error codes, and a report can be  produced  with  the  detected
       differences.  The  report  can be text or HTML.  When no type of report has been selected,
       diffoscope defaults to write a text report on the standard output.

       diffoscope was initially started by the "reproducible builds" Debian project and now being
       developed  as part of the (wider) ???Reproducible Builds??? initiative.  It is meant to be
       able to quickly understand why two builds of the same package produce  different  outputs.
       diffoscope was previously named debbindiff.

       See  the  COMMAND-LINE  EXAMPLES section further below to get you started, as well as more
       detailed explanations of all the  command-line  options.  The  same  information  is  also
       available in /usr/share/doc/diffoscope/README.rst or similar.

       path1  First file or directory to compare.

       path2  Second file or directory to compare.

              Display debug messages

       --pdb  Open the Python pdb debugger in case of crashes

       --status-fd FD
              Send machine-readable status to file descriptor FD

       --progress, --no-progress
              Show an approximate progress bar. Default: yes if stdin is a tty, otherwise no.

              Disable most default output limits and diff calculation limits.

       --load-existing-diff INPUT_FILE
              Load existing diff from file. Specify "-" to read a diffoscope diff from stdin.

   output types:
       --text OUTPUT_FILE
              Write plain text output to given file (use - for stdout)

       --text-color WHEN
              When  to  output  color  diff. WHEN is one of {never, auto, always}. Default: auto,
              meaning yes if the output is a terminal, otherwise no.

              If there was no difference, then output an empty diff for each output type that was
              specified. In --text output, an empty file is written.

       --html OUTPUT_FILE
              Write HTML report to given file (use - for stdout)

       --html-dir OUTPUT_DIR
              Write multi-file HTML report to given directory

       --css URL
              Link to an extra CSS for the HTML report

       --jquery URL
              URL  link  to  jQuery, for --html and --html-dir output.  If this is a non-existent
              relative URL, diffoscope will create a symlink to  a  system  installation.  (Paths
              searched: /usr/share/javascript/jquery/jquery.js.) If not given, --html output will
              not use JS but --htmldir will if it can be found; give "disable" to disable  JS  on
              all outputs.

       --json OUTPUT_FILE
              Write JSON text output to given file (use - for stdout)

       --markdown OUTPUT_FILE
              Write Markdown text output to given file (use - for stdout)

       --restructured-text OUTPUT_FILE
              Write RsT text output to given file (use - for stdout)

       --difftool TOOL
              Compare  differences  one-by-one  using  the  specified external command similar to

       --profile [OUTPUT_FILE]
              Write profiling info to given file (use - for stdout)

   output limits:
       --diff-context LINES
              Lines of unified diff context to show. (default: 7)

       --max-text-report-size BYTES
              Maximum bytes written in --text report. (0 to disable, default: 0)

       --max-report-size BYTES
              Maximum bytes of a report in a given format, across all of  its  pages.  Note  that
              some  formats,  such  as  --html,  may be restricted by even smaller limits such as
              --max-page-size. (0 to disable, default: 41943040)

       --max-diff-block-lines LINES
              Maximum number of lines output per unified-diff block,  across  all  pages.  (0  to
              disable, default: 1024)

       --max-page-size BYTES
              Maximum  bytes  of  the  top-level  (--html-dir)  or  sole (--html) page. (default:
              41943040, remains in effect even with --no-default-limits)

       --max-page-diff-block-lines LINES
              Maximum number of lines output per unified-diff block on the top-level (--html-dir)
              or  sole  (--html)  page,  before  spilling  it  into  a child page (--html-dir) or
              skipping the rest of the diff block. (default: 128, remains  in  effect  even  with

   diff calculation:
              Treat absent files as empty

       --exclude GLOB_PATTERN
              Exclude  files  whose  names (including any directory part) match GLOB_PATTERN. Use
              this option to ignore files based on their names.

       --exclude-command REGEX_PATTERN
              Exclude     commands      that      match      REGEX_PATTERN.      For      example
              '^readelf.*\s--debug-dump=info'   and   '^radare2.*'   can   takea  long  time  and
              differences here are likely secondary differences caused by  something  represented
              elsewhere. Use this option to disable commands that use a lot of resources.

       --exclude-directory-metadata {auto,yes,no,recursive}
              Exclude  directory  metadata.  Useful  if  comparing  files  whose filesystem-level
              metadata is not intended to be distributed to other systems. This is true for  most
              distributions  package  builders,  but  not true for the output of commands such as
              `make  install`.  Metadata  of  archive  members  remain  un-excluded   except   if
              "recursive"  choice  is  set.  Use  this  option to ignore permissions, timestamps,
              xattrs etc. Default: 'no' if comparing  two  directories,  else  'yes'.  Note  that
              "file"  metadata  is  actually  a  property  of its containing directory and is not
              relevant when distributing the file across systems.

       --extended-filesystem-attributes, --no-extended-filesystem-attributes
              Check potentially-expensive filesystem extended  attributes  such  as  POSIX  ACLs,
              lsattr(1)/chattr(1) attributes etc. (default: False)

       --diff-mask REGEX_PATTERN
              Replace/unify  substrings  that  match regular expression REGEX_PATTERN from output
              strings before applying diff. For example,  to  filter  out  a  version  number  or
              changed path.

       --fuzzy-threshold FUZZY_THRESHOLD
              Threshold for fuzzy-matching (0 to disable, 110 is default, 400 is high fuzziness)

       --tool-prefix-binutils PREFIX
              Prefix  for  binutils  program names, e.g.  "aarch64-linux-gnu-" for a foreign-arch
              binary or "g" if you're on a non-GNU system.

       --max-diff-input-lines LINES
              Maximum number of lines fed to diff(1) (0 to disable, default: 4194304)

       --max-container-depth DEPTH
              Maximum depth to recurse into containers. (Cannot be disabled for security reasons,
              default: 50)

       --timeout SECONDS
              Best-effort attempt at a global timeout in seconds. If enabled, diffoscope will not
              recurse into any further sub-archives after X  seconds  of  total  execution  time.
              (default: no timeout) [experimental]

       --max-diff-block-lines-saved LINES
              Maximum  number  of  lines  saved  per diff block. Most users should not need this,
              unless you run out of memory. This truncates diff(1) output before emitting it in a
              report,  and  affects  all  types  of  output,  including  --text and --json. (0 to
              disable, default: 0)

       --use-dbgsym WHEN
              When to automatically use corresponding -dbgsym packages when comparing .deb files.
              WHEN  is  one  of  {no,  auto,  yes}. Default: auto, meaning yes if two .changes or
              .buildinfo files are specified, otherwise no.

              Force recursing into the depths of  file  formats  even  if  files  have  the  same
              content, only really useful for debugging diffoscope. Default: False

   information commands:
       --help, -h
              Show this help and exit

              Show program's version number and exit

       --list-tools [DISTRO]
              Show external tools required and exit. DISTRO can be one of {arch, debian, FreeBSD,
              guix}. If specified, the output  will  list  packages  in  that  distribution  that
              satisfy these dependencies.

              List packages needed for Debian in 'substvar' format.

       --list-missing-tools [DISTRO]
              Show  missing external tools and exit. DISTRO can be one of {arch, debian, FreeBSD,
              guix}. If specified, the output  will  list  packages  in  that  distribution  that
              satisfy these dependencies.

   file formats supported:
       Android APK files, Android boot images, Apple Xcode
              mobile  provisioning  files,  ar(1)  archives,  ASM  Function, Berkeley DB database
              files, bzip2 archives, character/block devices, ColorSync colour  profiles  (.icc),
              Coreboot   CBFS  filesystem  images,  cpio  archives,  Dalvik  .dex  files,  Debian
              .buildinfo files, Debian .changes files, Debian source packages (.dsc), Device Tree
              Compiler   blob   files,   directories,   ELF   binaries,  ext2/ext3/ext4/btrfs/fat
              filesystems, Flattened Image Tree blob files, FreeDesktop Fontconfig  cache  files,
              FreePascal  files  (.ppu),  Gettext  message catalogues, GHC Haskell .hi files, GIF
              image files, Git repositories, GNU R database files (.rdb),  GNU  R  Rscript  files
              (.rds),  Gnumeric  spreadsheets,  GPG keybox databases, Gzipped files, Hierarchical
              Data Format database, ISO 9660 CD images, Java .class files,  Java  .jmod  modules,
              JavaScript  files,  JPEG  images,  JSON files, Linux kernel images, LLVM IR bitcode
              files, local (UNIX domain) sockets and named pipes (FIFOs), LZ4  compressed  files,
              macOS  binaries,  Microsoft  Windows  icon  files, Microsoft Word .docx files, Mono
              'Portable Executable' files, Mozilla-optimized .ZIP archives, Multimedia  metadata,
              OCaml  interface  files,  Ogg  Vorbis  audio  files, OpenOffice .odt files, OpenSSH
              public keys, OpenWRT package  archives  (.ipk),  PDF  documents,  PE32  files,  PGP
              signatures, PGP signed/encrypted messages, PNG images, PostScript documents, Public
              Key Cryptography Standards (PKCS)  files  (version  #7),  Python  .pyc  files,  RPM
              archives,  Rust  object files (.deflate), Sphinx inventory files, SQLite databases,
              SquashFS  filesystems,  symlinks,  tape  archives  (.tar),  tcpdump  capture  files
              (.pcap),  text  files,  TrueType font files, U-Boot legacy image files, WebAssembly
              binary module, XML binary schemas (.xsb), XML  files,  XMLB  files,  XZ  compressed
              files, ZIP archives and Zstandard compressed files.

   diffoscope homepage:



       Exit status is 0 if inputs are the same, 1 if different, 2 if trouble.


       To compare two files in-depth and produce an HTML report, run something like:

          $ diffoscope --html output.html build1.changes build2.changes

       diffoscope will exit with 0 if there's no differences and 1 if there are.

       To get all possible options, run:

          $ diffoscope --help

       If you have enough RAM, you can improve performance by running:

          $ TMPDIR=/run/shm diffoscope very-big-input-0/ very-big-input-1/

       By default this allowed to use up half of RAM; for more add something like:

          tmpfs   /run/shm    tmpfs   size=80%    0   0

       to your /etc/fstab; see man mount for details.


       diffoscope  requires  Python  3 and the following modules available on PyPI: libarchive-c,

       The various comparators rely on external commands being available. To get a list of  them,
       please run:

          $ diffoscope --list-tools


       Lunar,  Reiner  Herrmann,  Chris  Lamb,  Mattia  Rizzolo, Ximin Luo, Helmut Grohne, Holger
       Levsen, Daniel Kahn Gillmor, Paul Gevers, Peter De Wachter, Yasushi SHOJI,  Clemens  Lang,
       Ed Maste, Joachim Breitner, Mike McQuaid. Baptiste Daroussin, Levente Polyak.


       The  preferred  way to report bugs about diffoscope, as well as suggest fixes and requests
       for improvements is to submit reports to the issue tracker at:

       For more instructions, see CONTRIBUTING.rst in this directory.

       Join        the        users        and        developers         mailing-list:         <‐>

       diffoscope website is at <>


       diffoscope  is  free software: you can redistribute it and/or modify it under the terms of
       the GNU General Public License as  published  by  the  Free  Software  Foundation,  either
       version 3 of the License, or (at your option) any later version.

       diffoscope  is  distributed  in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.
       See the GNU General Public License for more details.

       You  should  have received a copy of the GNU General Public License along with diffoscope.
       If not, see <>.