#!/bin/sh

#
# update-vim-sources - update Vim sources with patches
#                      from Bram Moolenaar <Bram AT vim.org>.
#
# Thanks to Bram for patches! :-)
#
# Usage: source this script into your shell (I'm using zsh)
#        and yo can use function 'update-vim' for automaticaly
#        update. Function 'patch_sources 6.1.345' can be used
#        patch is already downloaded (or simply saved between
#        patches). With 'make_distribution' you can create your
#        own tarball with sources
#
# Developed by Lubomir Host 'rajo' <rajo AT platon.sk>
# Copyright (c) 2003 Platon SDG
# Licensed under terms of GNU General Public License.
# All rights reserved.
#

# $Platon$

# Define vim version:
VIM_VER="vim61"
VIM_VER_LONG="vim-6.1"
VIM_VER_EGREP="^6\.1\."

# Web site where patches are located
#URL="ftp://ftp.vim.org/pub/vim/unstable/patches/"
URL="ftp://ftp.vim.org/pub/vim/patches/"

# Directory where Vim sources are located
#SRC_DIR="/opt/scratch/rajo/src/own"
#SRC_DIR="/usr/src/vim"
SRC_DIR="$HOME/tmp/vim"

# Where save tar-bziped archiv
DIST_DIR="$HOME/public_html/vim/dist"

#
# END of user setup
######################################################

# '6.0.0.099' --> '98'
# for version 6.0.001 return empty string
old_version()
{
#	if [ "x$1" = "x6.0.001" ]; then
#		echo;
#		return;
#	fi
#	echo $1 | awk 'BEGIN {FS="."} { print "." $3 - 1 }'
#	echo $1 | awk 'BEGIN {FS="."} { print ".0" $3 - 1 }'
	echo $1 | awk 'BEGIN {FS="."} { print ".0" $3 - 1 }'
}

# '6.0.099' --> '99'
new_version()
{
#	echo $1 | awk 'BEGIN {FS="."} { print "." $3 - 1 + 1 }'
	echo $1 | awk 'BEGIN {FS="."} { print "." $3  }'
}

# download file from website
download_patch()
{
	local DIR
	DIR=`pwd`;
	cd $SRC_DIR/patches && \
		wget -nH -nd $URL/$1 || \
			( sleep 100;
				wget -nH -nd $URL/$1 ) || return 1 ;
	cd $DIR
}

#
# Extract ChangeLog information
#
filter_patch()
{
	awk 'BEGIN { skip = 1; }

/^------/ {
	skip = 0;
	getline;
	next;
}

/^\*\*\* / {
	exit;
}

skip == 0 {
	printf "    %s\n", $0;
}

'
}

#
# You can build Debian package - changelog si modified automaticaly
# with proper entry
#
modify_changelog()
{
	local DIR
	local patches
	#patches=`echo $* | awk -v RS=' ' '{ print;}' |sort -r -u -z`
	#echo "patches='$patches'"

	#if [ $# -gt 1 ]; then
	#	echo "Error: modify_changelog() allows only 1 argument!" > /dev/stderr
	#	exit 1;
	#fi

	DIR="`pwd`";
	cd $SRC_DIR \
		&& here="`pwd`" \
		&& for i in $*; do \
			test -f patches/$i \
			&& cp $VIM_VER/debian/changelog $VIM_VRE/debian/changelog.before-$i \
			&& ( echo "vim ($i) unstable; urgency=low" \
				&& echo && echo "  * Apply upstream patch:" \
				&& filter_patch < patches/$i \
				&& echo " -- Lubomir Host <rajo@platon.sk>  `date -R`" \
				&& echo ) > $VIM_VRE/debian/changelog \
			&& cat $VIM_VRE/debian/changelog.before-$i >> $VIM_VRE/debian/changelog
		done
	cd "$DIR"
}

#
# Aply one patch to vim sources
#
patch_sources()
{
	local DIR
	DIR="`pwd`";
	cd $SRC_DIR \
		&& here="`pwd`" \
		&& for i in $*; do \
			cd "$here/patches" \
			&& echo "--Using patch $i" \
			&& patch -p0 < $i \
				&& modify_changelog $i \
				&& cd "$here" \
				&& ln -s $VIM_VER $VIM_VER`new_version $i` || return 1
		done
	cd "$DIR"
}

make_distribution()
{
	local DIR DIST_FILE OLD_DIST_FILE
	DIR=`pwd`;
	DIST_FILE="$DIST_DIR/$VIM_VER_LONG`new_version $1`-all.tar.bz2"
	OLD_DIST_FILE="$DIST_DIR/$VIM_VER_LONG`old_version $1`-all.tar.bz2"
	cd /opt/scratch/rajo/src/vim/ && \
		tar cIf $DIST_FILE $VIM_VER`new_version $1` && \
			chmod a+r $DIST_FILE && \
				rm -f $OLD_DIST_FILE || return 1
	cd $DIR
}

#
# Update vim sources
#
update-vim()
{
	local DIR TMP_FILE
	DIR=`pwd`;
	TMP_FILE=`tempfile -p update_vim-zsh || mktemp /tmp/update_vim-zshXXXXXX || echo /tmp/update_vim-zsh$$`
	echo "Looking for new patches..."; 
	wget -O - $URL 2> /dev/null | awk 'BEGIN { FS=">" } {print $2}' | \
		egrep "$VIM_VER_EGREP" | sed 's/<.*//g;' > $TMP_FILE
	
	cd $SRC_DIR/patches && \
	(
		NEW_PATCHES="`ls -1| egrep "$VIM_VER_EGREP" | diff - $TMP_FILE | awk '{ print $2 }'`"
		if [ -z "$NEW_PATCHES" ]; then
			echo "No new patches..."
		else
			for i in `echo $NEW_PATCHES`
			do
				download_patch $i && patch_sources  $i || exit 1
			done
			#cd $SRC_DIR/$VIM_VER && make && make install
			cd $SRC_DIR/$VIM_VER && make && echo && echo "=================================" && su root -c make install
		fi
		
	)
	rm -f $TMP_FILE
	cd $DIR
}


#
# Completition function for zsh
#
compctl -K _vimhelptargets vimhelp
compctl -K _vimhelptargets gvimhelp
_vimhelptargets() {
#   local VIM vimversion tagsfile
#   vimpath=`vim -e -u NONE -U NONE \
#       --cmd 'set term=dumb'       \
#       --cmd 'set t_cm='           \
#       --cmd ':echo $VIM'          \
#       --cmd ':q!'                 \
#       | sed 's/^.*\[[0-9]\+;[0-9][Hm]//g;' |xxd`
#   vimversion=$(vim --version |& head -1 | sed -e 's/VIM - Vi IMproved \([^    ]\+\).*/vim\1/; s/\.//; ')
#   tagsfile="$vimpath/$vimversion/doc/tags"
    tagsfile="$HOME/install/share/vim/vim61/doc/tags"

    reply=($( cat $tagsfile | sed -e 's/	.*//' ))
}

# vim: ft=zsh
# vim600: fdm=marker fmr={,} fdc=3 fdl=0