* When building in a chroot, make a copy of a file if hard-linking
fails. This is likely to happen after a `nix-store --optimise', because some files may have 32000 links (NIX-111).
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@ -4,6 +4,7 @@
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#include "globals.hh"
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#include "local-store.hh"
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#include "util.hh"
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#include "archive.hh"
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#include <map>
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#include <iostream>
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@ -1604,8 +1605,18 @@ void DerivationGoal::startBuilder()
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dirsInChroot.insert(*i);
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else {
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Path p = chrootRootDir + *i;
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if (link(i->c_str(), p.c_str()) == -1)
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if (link(i->c_str(), p.c_str()) == -1) {
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/* Hard-linking fails if we exceed the maximum
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link count on a file (e.g. 32000 of ext3),
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which is quite possible after a `nix-store
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--optimise'. Make a copy instead. */
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if (errno != EMLINK)
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throw SysError(format("linking `%1%' to `%2%'") % p % *i);
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StringSink sink;
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dumpPath(*i, sink);
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StringSource source(sink.s);
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restorePath(p, source);
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}
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}
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}
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