tests/test-committer

purge: abort with missing files avoiding problems with name-mangling fs

In a name mangling filesystem (e.g. a case insensitive one)
dirstate.walk() can yield filenames different from the ones
stored in the dirstate. This already confuses the status and
add commands, but with purge this may cause data loss.

To prevent this purge refuses to work if there are missing
files and has a 'force' option if the user knows it is safe.

Even with the force option purge checks if any of the missing
files is still available in the working dir: if so there
may be some problem with the underlying filesystem, so it
unconditionally aborts.

#!/bin/sh

unset HGUSER
EMAIL="My Name <[e-mail]>"
export EMAIL

hg init test
cd test
touch asdf
hg add asdf
hg commit -d '1000000 0' -m commit-1
hg tip

unset EMAIL
echo 1234 > asdf
hg commit -d '1000000 0' -u "[e-mail]" -m commit-1
hg tip
echo "[ui]" >> .hg/hgrc
echo "username = foobar <[e-mail]>" >> .hg/hgrc
echo 12 > asdf
hg commit -d '1000000 0' -m commit-1
hg tip
echo 1 > asdf
hg commit -d '1000000 0' -u "[e-mail]" -m commit-1
hg tip
echo 123 > asdf
echo "[ui]" > .hg/hgrc
echo "username = " >> .hg/hgrc
hg commit -d '1000000 0' -m commit-1
rm .hg/hgrc
hg commit -d '1000000 0' -m commit-1 2>&1 | sed -e "s/'[^']*'/user@host/"