#!/bin/sh
# convert p4 logs to ChangeLog
#
# usage: p4tolog [file[revRange] ...]
#
# changes are written to stdout

# location of perforce client
P4=/home/perforce/bin/p4

prefix=""
while [ -n "$1" ]; do
	case "$1" in
	-p)
		# get depot filespec prefix to strip and escape slashes
		prefix=`echo $2 | sed -e 's#/#\\\\/#g'`
		shift
		;;
	*)
		break
		;;
	esac
	shift
done

# get relevant changes
changes=`$P4 changes $* | sed -e 's/Change \([0-9]*\).*/\1/'`
if test -z "$changes"; then
	echo "No changes"
	exit 0
fi

# convert each change
for change in $changes; do
	$P4 describe -s $change | head -1 | \
		sed -e 's/.*by \([^ @]*\)[^ ]* on \([^ ]*\) \([^ ]*\)/\2 \3 \1/'
	$P4 describe -s $change | \
		awk 'p==1 && !/^$/;/^Affected/{p=1}' | \
		sed -e 's/^[^ ]* \([^#]*\)#.*$/\1/' | sed -e "s/^$prefix//"
	echo
	$P4 describe -s $change | \
		awk 'p==1 && !/$^/;/^$/{if (p==1) exit; else p=1}' | \
		sed -e 's/^.//'
	echo
	echo "----------"
done