Hey Thomas! On Sun, May 22, 2022 at 12:03:23PM +0200, Thomas Schmitt wrote: >Steve McIntyre wrote: >> youre initial guess is correct. We don't generate the .iso files >> at all for the larger images [1]. This means we also don't have >> torrent files for them [2]. > >I began to ponder about a shortcut in libisofs which would trust the >checksum file (-checksum-list , -md5-list) enough to omit the reading of >all the package files' content. >Size, ownership, permissions, et.al would still be taken from the package >files on disk. No ISO image would emerge (because of no valid file content) >but .jigdo and .template would be created. >Probably libjte would need an API extension so that it knows that only >the count parameter of a libjte_show_data_chunk() call is valid. >Vice versa libisofs would have to ask libjte whether a particular file >is covered by the checksum list. > >All tricky and probably not worth the risk of embarassing failure.
Cute idea (grin!), but it's a non-started - we wouldn't be able to generate the various checksums for the whole image. >So back to my idea of merging ISOs: > >> The debian-cd code in tools/make_disc_trees.pl is not documentation >> **as such**, but it's exactly how we create disc trees: > >I am using it now for checking detail questions. > > >> It's baiscally just making a self-contained apt repository on each medium. > >So > https://wiki.debian.org/DebianRepository/Format >looks like the specs to follow. > >Question (to everybody): > >The description of Packages[.gz] files talks of "paragraphs" but does not >exactly define a paragraph's end delimiter. From Packages.gz in the ISO >i'd guess it is an empty line or the "Package" field of the next paragraph. > >Is an empty line needed between paragraphs ? Yup, it's an empty line. >Would more than one empty line between paragraphs damage the readability ? Not sure, to be honest. >Reason: I want to merge the Packages.gz files like > > (gunzip <from_DLBD_1/Packages.gz ; gunzip <from_DLBD_2/Packages.gz ) \ > | gzip >temp_file > >but am not sure that the found Packages.gz will always end by an empty >line. So i could simply insert an echo between the gunzips, or simply >trust that the empty line is not needed as separator, or begin to think ... Might just work, yeah! -- Steve McIntyre, Cambridge, UK. st...@einval.com < liw> everything I know about UK hotels I learned from "Fawlty Towers"
