debian/module/prep-modules

   1 #! /bin/sh
   2 #
   3 # Prepares to build kernel modules.  This script figures out and munges
   4 # version strings.  The goal is:
   5 #
   6 #  * Set the package name to openafs-modules-$(KVERS) where $(KVERS) is the
   7 #    major kernel revision plus the debian subrevision and whatever
   8 #    architecture string is appropriate if building against the stock Debian
   9 #    kernels.  $(KVERS) should be identical to the version component contained
  10 #    in the Debian kernel package names (in other words, the ABI version, not
  11 #    the package version)..
  12 #
  13 #  * Make the package recommend linux-image-$(KVERS) as appropriate for the
  14 #    kernel version that we're building against.  Use recommend rather than
  15 #    depends since the user may have built their own kernel outside of the
  16 #    Debian package infrastructure.
  17 #
  18 #  * Save the version number of the binary package in debian/VERSION for later
  19 #    use by dh_gencontrol.  This will be the version number of the source
  20 #    package followed by a + and the version number of the kernel package that
  21 #    we're building against.  If the kernel package version contains an epoch,
  22 #    try to hack our way into doing the right thing by using that epoch number
  23 #    as our own.  This isn't quite the right thing, but seems reasonably good.
  24 #
  25 # This script generates debian/control from debian/control.module using sed.
  26 # Unfortunately, substvars cannot be used since the name of the package is
  27 # modified and substvars happens too late.  It also outputs debian/VERSION,
  28 # containing the version of the binary package.
  29
  30 set -e
  31
  32 if [ "$#" -ne 1 ]; then
  33     echo "Usage: $0 <kernel-source-location>" >&2
  34     exit 1
  35 fi
  36
  37 # We can get the kernel version from one of three places.  If KVERS and KDREV
  38 # are both already set in the environment (which will be the case when invoked
  39 # by make-kpkg or module-assistant), use them.  Otherwise, if we have a kernel
  40 # source directory that contains debian/changelog (generated by make-kpkg),
  41 # parse that file to find the version information.  Finally, if neither works,
  42 # extract the kernel version from the kernel headers, append INT_SUBARCH to
  43 # that version if it's available, and assume a kernel package revision of -0
  44 # if none is provided.
  45 #
  46 # Set the variables $afs_kvers, which will hold the revision of the kernel,
  47 # and $afs_kdrev, which will hold the version of the kernel package that we're
  48 # building against.
  49
  50 changelog="$1/debian/changelog"
  51 if [ -n "$KVERS" ] && [ -n "$KDREV" ]; then
  52     afs_kvers="${KVERS}${INT_SUBARCH}"
  53     afs_kdrev="${KDREV}"
  54 elif [ ! -f "$changelog" ] ; then
  55     if [ -n "$KVERS" ] ; then
  56         afs_kvers="$KVERS"
  57     else
  58         afs_kvers=`perl debian/kernel-version "$1"`
  59     fi
  60     if [ -z "$KDREV" ] ; then
  61         afs_kdrev="${afs_kvers}-0"
  62     else
  63         afs_kvers="${afs_kvers}${INT_SUBARCH}"
  64         afs_kdrev="${KDREV}"
  65     fi
  66 else
  67     if [ -n "$KVERS" ] ; then
  68         afs_kvers="$KVERS"
  69     else
  70         afs_kvers=`head -1 "$changelog" \
  71             | sed -e 's/.*source-\([^ ]*\) (\([^)]*\)).*/\1/'`
  72     fi
  73     afs_kdrev=`head -1 "$changelog" \
  74         | sed -e 's/.*source-\([^ ]*\) (\([^)]*\)).*/\2/'`
  75 fi
  76
  77 # Generate the control file from the template.
  78
  79 sed -e "s/=KVERS/${afs_kvers}/g" debian/control.in > debian/control
  80
  81 # Now, calcuate the binary package version.  Extract the epoch from the kernel
  82 # package revision and add it to the beginning of the binary package version
  83 # if present.  Then, concatenate the source version, '+', and the kernel
  84 # package revision without the epoch.
  85
  86 afs_version=`head -1 debian/changelog | sed -e 's/.*(\([^)]*\)).*/\1/'`
  87 afs_epoch=`echo ${afs_kdrev} | sed -n -e 's/^\([0-9]*\):.*/\1/p'`
  88 afs_version="${afs_version}+`echo ${afs_kdrev} | sed -e 's/^[0-9]*://'`"
  89 if [ -n "$afs_epoch" ] ; then
  90     afs_version="${afs_epoch}:${afs_version}"
  91 fi
  92
  93 echo "$afs_version" > debian/VERSION