dcc37c236c
immediately add the result as a permanent GC root. This is the only
way to prevent a race with the garbage collector. For instance, the
old style
ln -s $(nix-store -r $(nix-instantiate foo.nix)) \
/nix/var/nix/gcroots/result
has two time windows in which the garbage collector can interfere
(by GC'ing the derivation and the output, respectively). On the
other hand,
nix-store --add-root /nix/var/nix/gcroots/result -r \
$(nix-instantiate --add-root /nix/var/nix/gcroots/drv \
foo.nix)
is safe.
* nix-build: use `--add-root' to prevent GC races.
29 lines
654 B
C++
29 lines
654 B
C++
#ifndef __SHARED_H
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#define __SHARED_H
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#include <string>
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#include "util.hh"
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/* These are not implemented here, but must be implemented by a
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program linking against libmain. */
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/* Main program. Called by main() after the ATerm library has been
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initialised and some default arguments have been processed (and
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removed from `args'). main() will catch all exceptions. */
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void run(Strings args);
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/* Should print a help message to stdout and return. */
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void printHelp();
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/* Ugh. No better place to put this. */
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Path makeRootName(const Path & gcRoot, int & counter);
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void printGCWarning();
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extern string programId;
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#endif /* !__SHARED_H */
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