jigit-mkimage - Create an ISO image from jigdo files

       Written by Steve McIntyre (steve@einval.com)

Jigit jigdo tools                                 November 2019                                 JIGIT-MKIMAGE(1)

       Copyright 2004-2019 Steve McIntyre (steve@einval.com)

       jigit-mkimage may be copied under the terms and conditions  of  version  2  of  the  GNU  General  Public
       License, as published by the Free Software Foundation (Cambridge, MA, USA).

       jigit-mkimage  knows how to parse a jigdo template file, commonly used when creating Debian CDs and DVDs.
       It can be used to actually convert a template file and associated files into an ISO image (hence the name
       jigit-mkimage), or with some command line options it will output useful information  about  the  template
       file instead.

       -ttemplatefile
              The  jigdo  .template  file  is  the  most  important  thing that jigit-mkimage needs, and must be
              specified for all operations.

       -jjigdofile
              The jigdo .jigdo file will normally acompany the .template file. To rebuild  the  image  you  must
              specify atleast one of the jigdo file and an MD5 file (-f).

       -fMD5file
              A  file  listing  files  available  locally  and  their  MD5  sums,  in the same format as used by
              genisoimage:

         MD5sum   File size  Path
         32 chars 12 chars   to end of line

       The MD5sum must be written in standard hexadecimal notation, the file size must list the size of the file
       in bytes, and the path must list the absolute path to the file. For example:

       00006dcd58ff0756c36d2efae21be376         14736  /mirror/debian/file1
       000635c69b254a1be8badcec3a8d05c1        211822  /mirror/debian/file2
       00083436a3899a09633fc1026ef1e66e         22762  /mirror/debian/file3

       A SHA256 file uses a similar format, but needs more space for the bigger checksum output  (64  characters
       rather than 32).

       To rebuild an image you must specify atleast one of the MD5/SHA256 file and a jigdo file (-j).

       -mitem=path
              Used  in  conjunction  with  a  jigdo  file;  specify where jigit-mkimage should look on the local
              filesystem to find the files it needs to make an image. (e.g. "Debian=/mirror/debian").

       -Mmissingfile
              If you're not sure if you have all the files needs to create an image, specify both the jigdo file
              and an MD5/SHA256 file along with the template file and -M <file>. jigit-mkimage will check to see
              that all the files are available insteadof building the image. Any files that are missing will be
              listed in the file specified here. See jigit for usage examples.

       -v     Make jigit-mkimage more verbose. Additional -v arguments will make it more verbose again.  Default
              level is 0 (almost no output). 1 will print progress in % while the image is being created; 2 will
              list every file and data block that is appended to the image.

       -llogfile
              jigit-mkimage  will  normally  write  to  stderr  when  it reports progress. Specify a logfile (or
              /dev/null) if you want it elsewhere.

       -O     Skip checking the validity of specified jigdo files. jigit-mkimage will  normally  check  for  the
              "JigsawDownload"  header  as a sanity check, but some very old jigdo files produced by Debian pre-
              dated the addition of this header.

       -ooutfile
              jigit-mkimage will normally write the ISO image to stdout, ready for piping into  cdrecord  or  to
              iso-image.pl. Specify an output filename if you want it written to disk instead.

       -q     jigit-mkimage  will  normally check the MD5/SHA256 sum of every file it reads and writes, and will
              fail if it finds any mismatches. Specify -q to tell  it  not  to.  This  will  normally  run  more
              quickly, but can leave you with a broken image so is POTENTIALLYDANGEROUS. Use with care!

       -sstartoffset
              Rather  than  start  at  the beginning of the image, skip to the specified offset and start output
              there. Probably only useful in iso-image.pl when resuming a download. Specifying a non-zero offset
              also implies -q, as it's difficult to check MD5/SHA256 sums when you're  not  checking  the  whole
              image.   -eendoffset  Rather  than  end at the end of the image, stop at the specified offset.
              Probably only useful in iso-image.pl when resuming a  download.  Specifying  an  end  offset  also
              implies -q, as it's difficult to check MD5/SHA256 sums when you're not checking the whole image.

       -z     Simply  parse the template file and print the size of the image that would be generated, in bytes.
              Only needs the template file to be specified, any other arguments will ignored.

jigit-mkimage-fMD5-jtest.jigdo-ttest.template-Mmissing
              Read in the files MD5, test.jigdo and  test.template  and  check  if  all  the  needed  files  are
              available. If any are missing, list them in missing.

       jigit-mkimage-z-ttest.template
              Find out how big the ISO image would be from expanding test.template.

       jigit-mkimage-v-fMD5-ttest.template-otest.iso
              Build  the  iso  image  in  test.iso,  using  files  listed in MD5 to fill in what's needed by the
              template file test.template. Show progress as the image is built.

       jigit-mkimage - Create an ISO image from jigdo files

jigdo-file(1), jigit(1), jigsum(1) and jigdump(1).

jigit-mkimage-jjigdo-ttemplate [options]...

       jigit-mkimage-ttemplate -z [options]...

       jigit-mkimage-fmd5-list-ttemplate-Mmissing-list [options]...

       jigit-mkimage-Fsha256-list-ttemplate-Mmissing-list [options]...