Import Debian changes 1.8.5-1

[hcoop/debian/openafs.git] / debian / module / prep-modules

diff --git a/debian/module/prep-modules b/debian/module/prep-modules
new file mode 100755 (executable)
index 0000000..91846ea
--- /dev/null
+++ b/debian/module/prep-modules
@@ -0,0 +1,93 @@
+#! /bin/sh
+#
+# Prepares to build kernel modules.  This script figures out and munges
+# version strings.  The goal is:
+#
+#  * Set the package name to openafs-modules-$(KVERS) where $(KVERS) is the
+#    major kernel revision plus the debian subrevision and whatever
+#    architecture string is appropriate if building against the stock Debian
+#    kernels.  $(KVERS) should be identical to the version component contained
+#    in the Debian kernel package names (in other words, the ABI version, not
+#    the package version)..
+#
+#  * Make the package recommend linux-image-$(KVERS) as appropriate for the
+#    kernel version that we're building against.  Use recommend rather than
+#    depends since the user may have built their own kernel outside of the
+#    Debian package infrastructure.
+#
+#  * Save the version number of the binary package in debian/VERSION for later
+#    use by dh_gencontrol.  This will be the version number of the source
+#    package followed by a + and the version number of the kernel package that
+#    we're building against.  If the kernel package version contains an epoch,
+#    try to hack our way into doing the right thing by using that epoch number
+#    as our own.  This isn't quite the right thing, but seems reasonably good.
+#
+# This script generates debian/control from debian/control.module using sed.
+# Unfortunately, substvars cannot be used since the name of the package is
+# modified and substvars happens too late.  It also outputs debian/VERSION,
+# containing the version of the binary package.
+
+set -e
+
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 <kernel-source-location>" >&2
+    exit 1
+fi
+
+# We can get the kernel version from one of three places.  If KVERS and KDREV
+# are both already set in the environment (which will be the case when invoked
+# by make-kpkg or module-assistant), use them.  Otherwise, if we have a kernel
+# source directory that contains debian/changelog (generated by make-kpkg),
+# parse that file to find the version information.  Finally, if neither works,
+# extract the kernel version from the kernel headers, append INT_SUBARCH to
+# that version if it's available, and assume a kernel package revision of -0
+# if none is provided.
+#
+# Set the variables $afs_kvers, which will hold the revision of the kernel,
+# and $afs_kdrev, which will hold the version of the kernel package that we're
+# building against.
+
+changelog="$1/debian/changelog"
+if [ -n "$KVERS" ] && [ -n "$KDREV" ]; then
+    afs_kvers="${KVERS}${INT_SUBARCH}"
+    afs_kdrev="${KDREV}"
+elif [ ! -f "$changelog" ] ; then
+    if [ -n "$KVERS" ] ; then
+        afs_kvers="$KVERS"
+    else
+        afs_kvers=`perl debian/kernel-version "$1"`
+    fi
+    if [ -z "$KDREV" ] ; then
+        afs_kdrev="${afs_kvers}-0"
+    else
+        afs_kvers="${afs_kvers}${INT_SUBARCH}"
+        afs_kdrev="${KDREV}"
+    fi
+else
+    if [ -n "$KVERS" ] ; then
+        afs_kvers="$KVERS"
+    else
+        afs_kvers=`head -1 "$changelog" \
+            | sed -e 's/.*source-\([^ ]*\) (\([^)]*\)).*/\1/'`
+    fi
+    afs_kdrev=`head -1 "$changelog" \
+        | sed -e 's/.*source-\([^ ]*\) (\([^)]*\)).*/\2/'`
+fi
+
+# Generate the control file from the template.
+
+sed -e "s/=KVERS/${afs_kvers}/g" debian/control.in > debian/control
+
+# Now, calcuate the binary package version.  Extract the epoch from the kernel
+# package revision and add it to the beginning of the binary package version
+# if present.  Then, concatenate the source version, '+', and the kernel
+# package revision without the epoch.
+
+afs_version=`head -1 debian/changelog | sed -e 's/.*(\([^)]*\)).*/\1/'`
+afs_epoch=`echo ${afs_kdrev} | sed -n -e 's/^\([0-9]*\):.*/\1/p'`
+afs_version="${afs_version}+`echo ${afs_kdrev} | sed -e 's/^[0-9]*://'`"
+if [ -n "$afs_epoch" ] ; then
+    afs_version="${afs_epoch}:${afs_version}"
+fi
+
+echo "$afs_version" > debian/VERSION