. $(dirname $0)/functions

# SQLite is a special beast -- its source is maintained in regular
# C files, but it is distributed (and maintained in Android in that
# form) in concatenated files.
#
# Grabbing it from fossil (its SCM) is not as useful as with other
# projects -- so let's parse its website for updates.
#
# Also, its release numbering scheme doesn't quite match that of the
# rest of the world (The release is 3.8.10.1, but the filename is
# 3081001 -- 3.8.10 becomes 3081000...)

idtoversion() {
	local VERSIONID=$1
	local MAJORLEN=$((${#VERSIONID}-6))
	local V1=$(echo $VERSIONID |cut -b1-${MAJORLEN} | sed -e 's,^0*,,')
	local V2=$(echo $VERSIONID |cut -b$((MAJORLEN+1))-$((MAJORLEN+2)) | sed -e 's,^0,,')
	local V3=$(echo $VERSIONID |cut -b$((MAJORLEN+3))-$((MAJORLEN+4)) | sed -e 's,^0,,')
	local V4=$(echo $VERSIONID |cut -b$((MAJORLEN+5))-$((MAJORLEN+6)) | sed -e 's,^0*,,')
	local V="$V1.$V2.$V3"
	[ -n "$V4" ] && V="$V.$V4"
	echo -n $V
}
versiontoid() {
	echo -n $(echo $1 |cut -d. -f1)$(digits 2 $(echo $1 |cut -d. -f2))$(digits 2 $(echo $1 |cut -d. -f3))$(digits 2 $(echo $1 |cut -d. -f4))
}

LATEST=`curl http://www.sqlite.org/download.html |grep /sqlite-amalgamation |cut -d\' -f4 |grep -v snapshot`
if ! echo $LATEST |grep -qE '[0-9][0-9][0-9][0-9]/sqlite-amalgamation-[0-9]+\.zip'; then
	error "SQLite download page changed its format."
	exit 1
fi
VERSIONID=`echo $LATEST |cut -d- -f3 |sed -e 's,\..*,,'`
V=`idtoversion $VERSIONID`

checkout platform/external/sqlite

cd $SRC/platform/external/sqlite
if git branch -a |grep -q linaro-upstream-$V; then
	ok "SQLite is up to date."
	exit 0
fi

git checkout -b linaro-upstream-work-$TIMESTAMP aosp/master
# We can't rely on dist/version - upstream frequently forgets to update it
AOSPVER=`grep -E 'SQLITE_VERSION.*"[0-9].*"' dist/sqlite3.h |cut -d\" -f2`

if [ "$V" = "$AOSPVER" ]; then
	notice "SQLite is up to date in AOSP master, copying its work"
else
	notice "Updating SQLite to $V"
	cd dist
	LANG=C diff -rud orig . |grep -v "Only in" >Android.patch
	cd ..
	wget http://www.sqlite.org/$LATEST
	ZIPFILE=`basename $LATEST`
	unzip $ZIPFILE
	cp -f `basename $ZIPFILE .zip`/* dist/
	mv `basename $ZIPFILE .zip`/* dist/orig/
	cd dist
	if patch -p1 <Android.patch; then
		notice "Auto-updated SQLite to $V."
		echo "downloaded from $LATEST" >version
		LANG=C diff -rud orig . |grep -v "Only in" >Android.patch
		git commit -asm "Update to SQLite $V"
		git clean -d -f -x
	else
		error "Couldn't auto-update SQLite - patch failed to apply."
		error "Please fix manually and commit to a branch called"
		error "linaro-upstream-$V."
		exit 1
	fi
	cd ..
fi

git push origin linaro-upstream-work-$TIMESTAMP:linaro-upstream-$V
git pull
git checkout -b linaro-upstream-$V origin/linaro-upstream-$V
git branch -D linaro-upstream-work-$TIMESTAMP
pwd