#! /bin/bash

# Butchered version of snapshot
# Can only run on the shell compile farm server
# Will always create a snapshot of HEAD
# If want multiple snapshots, just run with "sfsnapshot [branch ...]"
# Assumes:
#  ssh setup to send to shell.sf.net and $CF without password prompt
#  the compile server has all the prerequisites stated at http://nagiosplug.sourceforge.net/developer-guidelines.html
# Install in cron with something like:
#  47 * * * * $HOME/bin/mail_error -o $HOME/sfsnapshot.out -m tonvoon@users.sf.net sfsnapshot r1_3_0

function die { echo $1; exit 1; }

# This makes the distribution. Expects $1 as CVS tag, otherwise uses HEAD
function make_dist {
	if [[ -n $1 ]] ; then
		cvs_rel=$1
		v="$1-"
	else
		cvs_rel="HEAD"
		v="HEAD-"
	fi
	
	# Get compile server to do the work
	# Variables will be expanded locally before being run on $CF
	ssh $CF <<EOF
	set -x
	PATH=$PATH:/usr/local/bin
	[[ ! -d $COMPILE_DIR/$cvs_rel ]] && mkdir -p $COMPILE_DIR/$cvs_rel
	cd $COMPILE_DIR/$cvs_rel

	# Cannot use cvs export due to conflicts on second run - think this is better for cvs server
	CVS_RSH=ssh cvs -z3 -d:ext:tonvoon@nagiosplug.cvs.sourceforge.net:/cvsroot/nagiosplug co -r $cvs_rel nagiosplug

	cd $PROJECT

	tools/setup

	./configure

	# Make the Nagiosplug dist tarball
	make dist VERSION=$v$DS RELEASE=snapshot

	# May fail if file not generated - do not trap
	mv *.gz $IN

	rm -rf $COMPILE_DIR
	# End ssh
EOF
}

# Set working variables
PROJECT=nagiosplug

# This is local to the compile server for faster compile
COMPILE_DIR=/tmp/tonvoon/tmp_snapshot

#  Needs to be on NFS so gz file can be read on the compile shell server
IN=${HOME}/tmp_snapshot

# Where to place the generated files
OUT_SERVER="shell.sf.net"
OUT="/home/groups/n/na/nagiosplug/htdocs/snapshot"

# Make sure prereqs are satisfied on server!
CF="x86-linux2"
DS=`date -u +%Y%m%d%H%M`

# Setup home directory area
[[ ! -d $IN ]] && mkdir -p $IN

# Make dists for HEAD and any others in command parameters
make_dist
for i in $* ; do
	make_dist $i
done

# Check for *.gz files locally (expect NFS between cf shell server and $CF)
set -x
files=$(ls $IN/*.gz 2>/dev/null)
[[ -z $files ]] && die "No files created"
head_file=$(cd $IN && ls *HEAD*.gz 2>/dev/null)
ssh -2 $OUT_SERVER "rm -f $OUT/*.gz"
scp -2 $files $OUT_SERVER:$OUT
if [[ -n $head_file ]] ; then
	ssh -2 $OUT_SERVER "cd $OUT && ln -s $head_file nagios-plugins-HEAD.tar.gz"
fi

# Create MD5 sum
ssh -2 $OUT_SERVER << EOF
cd $OUT
cat <<-END_README > README
This is the daily CVS snapshot of nagiosplug, consisting of the CVS HEAD
and any other branches.

The nagios-plugins-HEAD.tar.gz link will always go to the latest HEAD snapshot.

The MD5SUM is:
END_README
md5sum *.gz | tee -a README > MD5SUM
EOF

rm -f $files

# Work out success or failure
expected=$(($# + 1))
set -- $files
[[ $# -ne $expected ]] && die "Expected $expected, got $#"
exit 0