lix/tests/case-hack.sh
Eelco Dolstra 276a40b31f Handle case collisions on case-insensitive systems
When running NixOps under Mac OS X, we need to be able to import store
paths built on Linux into the local Nix store. However, HFS+ is
usually case-insensitive, so if there are directories with file names
that differ only in case, then importing will fail.

The solution is to add a suffix ("~nix~case~hack~<integer>") to
colliding files. For instance, if we have a directory containing
xt_CONNMARK.h and xt_connmark.h, then the latter will be renamed to
"xt_connmark.h~nix~case~hack~1". If a store path is dumped as a NAR,
the suffixes are removed. Thus, importing and exporting via a
case-insensitive Nix store is round-tripping. So when NixOps calls
nix-copy-closure to copy the path to a Linux machine, you get the
original file names back.

Closes #119.
2014-07-16 16:02:05 +02:00

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source common.sh
clearStore
rm -rf $TEST_ROOT/case
opts="--option use-case-hack true"
# Check whether restoring and dumping a NAR that contains case
# collisions is round-tripping, even on a case-insensitive system.
nix-store $opts --restore $TEST_ROOT/case < case.nar
nix-store $opts --dump $TEST_ROOT/case > $TEST_ROOT/case.nar
cmp case.nar $TEST_ROOT/case.nar
[ "$(nix-hash $opts --type sha256 $TEST_ROOT/case)" = "$(nix-hash --flat --type sha256 case.nar)" ]
# Check whether we detect true collisions (e.g. those remaining after
# removal of the suffix).
touch "$TEST_ROOT/case/xt_CONNMARK.h~nix~case~hack~3"
! nix-store $opts --dump $TEST_ROOT/case > /dev/null