From 630ae0c9d7f65a2d6bef85a5194b4d704e54eded Mon Sep 17 00:00:00 2001 From: Eelco Dolstra Date: Tue, 1 Feb 2005 13:48:46 +0000 Subject: * nix-build: use an indirection scheme to make it easier for users to get rid of GC roots. Nix-build places a symlink `result' in the current directory. Previously, removing that symlink would not remove the store path being linked to as a GC root. Now, the GC root created by nix-build is actually a symlink in `/nix/var/nix/gcroots/auto' to `result'. So if that symlink is removed the GC root automatically becomes invalid (since it can no longer be resolved). The root itself is not automatically removed - the garbage collector should delete dangling roots. --- src/libutil/util.cc | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'src/libutil/util.cc') diff --git a/src/libutil/util.cc b/src/libutil/util.cc index 5b6fb62026c7..108c054b7f41 100644 --- a/src/libutil/util.cc +++ b/src/libutil/util.cc @@ -135,6 +135,15 @@ Path readLink(const Path & path) } +bool isLink(const Path & path) +{ + struct stat st; + if (lstat(path.c_str(), &st)) + throw SysError(format("getting status of `%1%'") % path); + return S_ISLNK(st.st_mode); +} + + Strings readDirectory(const Path & path) { Strings names; -- cgit 1.4.1