time: switch to using (uncompressed) zoneinfo zip file

Removal of old zoneinfo files is a separate CL due to its size.

R=golang-dev, bradfitz, r
CC=golang-dev
http://codereview.appspot.com/5676100

3 files changed, 14 insertions, 8 deletions

diff --git a/lib/time/README b/lib/time/README
index be519febf..d83e0addf 100644
--- a/lib/time/README
+++ b/lib/time/README
@@ -1,4 +1,4 @@
-The zoneinfo directory contains time zone files compiled using
+The zoneinfo.zip archive contains time zone files compiled using
 the code and data maintained as part of the IANA Time Zone Database.
 The IANA asserts that the database is in the public domain.
 
@@ -7,3 +7,4 @@ http://www.iana.org/time-zones
 ftp://ftp.iana.org/tz/code/tz-link.htm
 http://tools.ietf.org/html/draft-lear-iana-timezone-database-05
 
+To rebuild the archive, read and run update.bash.
diff --git a/lib/time/update.bash b/lib/time/update.bash
index 30ca2c701..ef7fdc79b 100755
--- a/lib/time/update.bash
+++ b/lib/time/update.bash
@@ -11,9 +11,10 @@ CODE=2011i
 DATA=2011n
 
 set -e
-rm -rf zoneinfo work
-mkdir zoneinfo work
+rm -rf work
+mkdir work
 cd work
+mkdir zoneinfo
 curl -O http://www.iana.org/time-zones/repository/releases/tzcode$CODE.tar.gz
 curl -O http://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz
 tar xzf tzcode$CODE.tar.gz
@@ -23,23 +24,27 @@ tar xzf tzdata$DATA.tar.gz
 # We don't need those until 2037.
 perl -p -i -e 's/pass <= 2/pass <= 1/' zic.c
 
-make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=../zoneinfo posix_only
+make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=zoneinfo posix_only
 
 # America/Los_Angeles should not be bigger than 1100 bytes.
 # If it is, we probably failed to disable the 64-bit output, which
 # triples the size of the files.
-size=$(ls -l ../zoneinfo/America/Los_Angeles | awk '{print $5}')
+size=$(ls -l zoneinfo/America/Los_Angeles | awk '{print $5}')
 if [ $size -gt 1200 ]; then
 	echo 'zone file too large; 64-bit edit failed?' >&2
 	exit 2
 fi
 
-cd ..
-hg addremove zoneinfo
+cd zoneinfo
+rm -f ../../zoneinfo.zip
+zip -0 -r ../../zoneinfo.zip *
+cd ../..
+
 echo
 if [ "$1" == "-work" ]; then 
 	echo Left workspace behind in work/.
 else
 	rm -rf work
 fi
-echo New time zone files in zoneinfo/.
+echo New time zone files in zoneinfo.zip.
+
diff --git a/lib/time/zoneinfo.zip b/lib/time/zoneinfo.zip
new file mode 100644
index 000000000..b54213239
--- /dev/null
+++ b/lib/time/zoneinfo.zip