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#!/bin/bash
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#
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# SvarDOS build script
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# http://svardos.osdn.io
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# Copyright (C) 2016-2021 Mateusz Viste
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#
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# This script generates the SvarDOS repository index and builds ISO CD images.
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# It should be executed each time that a package has been modified, added or
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# removed.
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#
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# usage: ./build.sh [noclean]
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#
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### parameters block starts here ############################################
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PKGDIR=`realpath ./packages`
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REPOROOT=`realpath ./website/repo`
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BUILDIDX=`realpath ./buildidx/buildidx`
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PUBDIR=`realpath ./website/download`
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CDROOT=`realpath ./cdroot`
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FLOPROOT=`realpath ./floproot`
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CUSTFILES=`realpath ./files`
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GENISOIMAGE=''    # can be mkisofs, genisoimage or empty for autodetection
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### parameters block ends here ##############################################
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# auto-detect whether to use mkisofs or genisoimage
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if [ "x$GENISOIMAGE" == "x" ] ; then
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mkisofs --help 2> /dev/null
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if [ $? -eq 0 ] ; then
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  GENISOIMAGE='mkisofs'
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fi
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fi
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if [ "x$GENISOIMAGE" == "x" ] ; then
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genisoimage --help 2> /dev/null
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if [ $? -eq 0 ] ; then
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  GENISOIMAGE='genisoimage'
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fi
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fi
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if [ "x$GENISOIMAGE" == "x" ] ; then
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  echo "ERROR: neither genisoimage nor mkisofs was found on this system"
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  exit 1
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fi
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# abort if anything fails
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set -e
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# list of packages to be part of CORE (always installed)
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COREPKGS="amb attrib chkdsk choice command cpidos ctmouse deltree devload diskcopy display dosfsck edit fc fdapm fdisk format help himemx kernel keyb keyb_lay label mem mode more move pkg pkgnet shsucdx sort tree"
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# list of packages to be part of EXTRA (only sometimes installed, typically drivers)
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EXTRAPKGS="pcntpk udvd2"
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# all packages
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ALLPKGS="$COREPKGS $EXTRAPKGS"
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# function that builds the packages repository
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function dorepo {
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  # copy all zip files to the web repo
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  cp "$PKGDIR"/* $REPOROOT/
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  # now strip the sources from repo versions
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  find "$REPOROOT/" -iname '*.zip' -exec zip "{}" -d "SOURCE/*" ';'
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  find "$REPOROOT/" -iname '*.zip' -exec zip "{}" -d "source/*" ';'
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  find "$REPOROOT/" -iname '*.zip' -exec zip "{}" -d "Source/*" ';'
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  # build repo idx
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  $BUILDIDX "$REPOROOT/"
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}
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# prepares image for floppy sets of:
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# $1 cylinders
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# $2 heads (sides)
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# $3 sectors per track
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# $4 size
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# $5 where to put a copy of the image (optional)
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function prep_flop {
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  mkdir $4
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  mformat -C -t $1 -h $2 -s $3 -v SVARDOS -B "$CUSTFILES/floppy.mbr" -i "$4/disk1.img"
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  mcopy -sQm -i "$4/disk1.img" "$FLOPROOT/"* ::/
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  # now populate the floppies
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  curdisk=1
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  for p in $ALLPKGS ; do
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    # if copy fails, then probably the floppy is full - try again after
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    # creating an additional floppy image
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    if ! mcopy -mi "$4/disk$curdisk.img" "$CDROOT/$p.zip" ::/ ; then
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      curdisk=$((curdisk+1))
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      mformat -C -t $1 -h $2 -s $3 -v SVARDOS -i "$4/disk$curdisk.img"
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      mcopy -mi "$4/disk$curdisk.img" "$CDROOT/$p.zip" ::/
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    fi
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  done
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  # add a short readme
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  echo "This directory contains a set of $curdisk floppy images of the SvarDOS distribution in the $4 KB floppy format." > "$4/readme.txt"
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  echo "" >> "$4/readme.txt"
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  echo "These images are raw floppy disk dumps. To write them on an actual floppy disk, you have to use a low-level sector copying tool, like dd." >> "$4/readme.txt"
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  echo "" >> "$4/readme.txt"
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  echo "Latest SvarDOS version is available on the project's homepage: http://svardos.osdn.io" >> "$4/readme.txt"
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  unix2dos "$4/readme.txt"
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  # make a copy of the image, if requested
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  if [ "x$5" != "x" ] ; then
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    cp "$4/disk1.img" $5
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  fi
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  # zip the images (and remove them at the same time)
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  rm -f "$PUBDIR/svardos-floppy-$4k.zip"
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  zip -9 -rmj "$PUBDIR/svardos-floppy-$4k.zip" $4/*
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  # clean up
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  rmdir $4
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}
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### actual code flow starts here ############################################
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# check presence of the buildidx tool
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if [ ! -f "$BUILDIDX" ] ; then
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  echo "buildidx not found at $BUILDIDX"
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  exit 1
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fi
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# remember where I am, so I can get back here once all is done
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origdir=`pwd`
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mkdir "$CDROOT"
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mkdir "$FLOPROOT"
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# build the repo (also builds the listing.txt file)
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dorepo
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# add CORE packages to CDROOT + create the list of packages on floppy
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for pkg in $COREPKGS ; do
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  cp "$REPOROOT/$pkg.zip" "$CDROOT/"
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  echo "$pkg" >> "$FLOPROOT/install.lst"
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done
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# add EXTRA packages to CDROOT (but not in the list of packages so instal won't install them by default)
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for pkg in $EXTRAPKGS ; do
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  cp "$REPOROOT/$pkg.zip" "$CDROOT/"
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done
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# prepare the content of the boot (install) floppy
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cp "install/install.com" "$FLOPROOT/"
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cp "install/nls/"install.?? "$FLOPROOT/"
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cp -r "$CUSTFILES/floppy/"* "$FLOPROOT/"
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unzip -Cj packages/cpidos.zip 'cpi/ega*.cpx' -d "$FLOPROOT/"
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unzip -Cj packages/command.zip bin/command.com -d "$FLOPROOT/"
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unzip -Cj packages/display.zip bin/display.exe -d "$FLOPROOT/"
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unzip -Cj packages/edit.zip bin/edit.exe -d "$FLOPROOT/"
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unzip -Cj packages/fdapm.zip bin/fdapm.com -d "$FLOPROOT/"
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unzip -Cj packages/fdisk.zip bin/fdisk.exe bin/fdiskpt.ini -d "$FLOPROOT/"
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unzip -Cj packages/format.zip bin/format.exe -d "$FLOPROOT/"
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unzip -Cj packages/kernel.zip bin/kernel.sys bin/sys.com -d "$FLOPROOT/"
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unzip -Cj packages/mem.zip bin/mem.exe -d "$FLOPROOT/"
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unzip -Cj packages/mode.zip bin/mode.com -d "$FLOPROOT/"
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unzip -Cj packages/more.zip bin/more.exe -d "$FLOPROOT/"
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unzip -Cj packages/pkg.zip bin/pkg.exe -d "$FLOPROOT/"
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# build the boot (CD) floppy image
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export MTOOLS_NO_VFAT=1
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#mformat -C -f 2880 -v SVARDOS -B "$CUSTFILES/floppy.mbr" -i "$CDROOT/boot.img"
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#mcopy -sQm -i "$CDROOT/boot.img" "$FLOPROOT/"* ::/
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# prepare images for floppies in different sizes (args are C H S SIZE)
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prep_flop 80 2 36 2880 "$CDROOT/boot.img"
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prep_flop 80 2 18 1440
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prep_flop 80 2 15 1200
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prep_flop 80 2  9  720
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CDISO="$PUBDIR/svardos-cd.iso"
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CDZIP="$PUBDIR/svardos-cd.zip"
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# delete previous (if any) iso
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echo "cleaning up old versions..."
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rm -f "$CDISO" "$CDZIP"
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$GENISOIMAGE -input-charset cp437 -b boot.img -iso-level 1 -f -V SVARDOS -o "$CDISO" "$CDROOT/boot.img"
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# compress the ISO
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zip -mj9 "$CDZIP" "$CDISO"
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# cleanup temporary things
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if [ "x$1" != "xnoclean" ] ; then
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  rm -rf "$CDROOT" "$FLOPROOT"
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fi
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cd "$origdir"
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#cd svnlschk
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#./webgen.sh
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#cd ..
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echo "ALL DONE!"
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exit 0