tests/test-hgignore

Fix hg push and hg push -r sometimes creating new heads without --force.
Fixing issue179.

The algorithm checks if there not more new heads on the remote side than heads
which become non-heads due to getting children.

Pushing this repo:
    m
   /\
3 3a|
|/  /
2 2a
|/
1

to a repo only having 1, 2 and 3 didn't abort requiring --force before.

Added test cases for this and some doc strings for used methods.

#!/bin/sh

hg init
touch a.o
touch a.c
touch syntax
mkdir dir
touch dir/a.o
touch dir/b.o
touch dir/c.o

hg add dir/a.o
hg commit -m 0
hg add dir/b.o

echo "--" ; hg status

echo "*.o" > .hgignore
echo "--" ; hg status 2>&1 | sed -e 's/abort: .*\.hgignore:/abort: .hgignore:/'

echo ".*\.o" > .hgignore
echo "--" ; hg status

# XXX: broken
#echo "glob:**.o" > .hgignore
#echo "--" ; hg status
#
#echo "glob:*.o" > .hgignore
#echo "--" ; hg status

echo "syntax: invalid" > .hgignore
echo "--" ; hg status 2>&1 | sed -e 's/.*\.hgignore:/.hgignore:/'

echo "syntax: glob" > .hgignore
echo "*.o" >> .hgignore
echo "--" ; hg status

echo "relglob:syntax*" > .hgignore
echo "--" ; hg status

echo "relglob:*" > .hgignore
echo "--" ; hg status

cd dir
echo "--" ; hg status .