view tests/test-symlink-basic @ 4310:c8919eb0f315

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

cat >> readlink.py <<EOF
import os
import sys

for f in sys.argv[1:]:
    print f, '->', os.readlink(f)
EOF

hg init a
cd a
ln -s nothing dangling
hg add dangling
hg commit -m 'add symlink' -d '0 0'

hg tip -v
hg manifest --debug
echo '% rev 0:'
python ../readlink.py dangling

rm dangling
ln -s void dangling
hg commit -m 'change symlink'
echo '% rev 1:'
python ../readlink.py dangling

echo '% modifying link'
rm dangling
ln -s empty dangling
python ../readlink.py dangling

echo '% reverting to rev 0:'
hg revert -r 0 -a
python ../readlink.py dangling

echo '% backups:'
python ../readlink.py *.orig

rm *.orig
hg up -C
echo '% copies'
hg cp -v dangling dangling2
hg st -Cmard
python ../readlink.py dangling dangling2