fix backtrace printed when cannot get lock.
change lock error handling code so exceptions have useful info and
exception handling in one place.
add test case for when cannot get lock.
#!/bin/sh
mkdir test
cd test
hg init
echo foo>foo
hg addremove
hg commit -m 1
echo bar>bar
hg addremove
hg commit -m 2
mkdir baz
echo bletch>baz/bletch
hg addremove
hg commit -m 3
echo "[web]" >> .hg/hgrc
echo "name = test-archive" >> .hg/hgrc
echo "allowzip = true" >> .hg/hgrc
echo "allowgz = true" >> .hg/hgrc
echo "allowbz2 = true" >> .hg/hgrc
hg serve -p 20059 -d --pid-file=hg.pid
TIP=`hg id -v | cut -f1 -d' '`
QTIP=`hg id -q`
cat > getarchive.py <<EOF
import sys, urllib2
node, archive = sys.argv[1:]
f = urllib2.urlopen('http://127.0.0.1:20059/?cmd=archive;node=%s;type=%s'
% (node, archive))
sys.stdout.write(f.read())
EOF
http_proxy= python getarchive.py "$TIP" gz | gunzip -dc - | tar tf - | sed "s/$QTIP/TIP/"
http_proxy= python getarchive.py "$TIP" bz2 | bunzip2 -dc - | tar tf - | sed "s/$QTIP/TIP/"
http_proxy= python getarchive.py "$TIP" zip > archive.zip
unzip -t archive.zip | sed "s/$QTIP/TIP/"
kill `cat hg.pid`
sleep 1 # wait for server to scream and die