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path: root/src/nix-store/help.txt
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2005-02-01* nix-store, nix-instantiate: added an option `--add-root' toEelco Dolstra
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.
2005-01-25* In nix-store: added query `--referers-closure' that returns theEelco Dolstra
closure of the referers relation rather than the references relation, i.e., the set of all paths that directly or indirectly refer to the given path. Note that contrary to the references closure this set is not fixed; it can change as paths are added to or removed from the store.
2005-01-25* In nix-store: change `--build' back to `--realise'. Also broughtEelco Dolstra
back the query flag `--force-realise'. * Fixed some of the tests.
2005-01-19* Change extension `.store' to `.drv'.Eelco Dolstra
* Re-enable `nix-store --query --requisites'.
2004-12-20* Simplify the substitute mechanism:Eelco Dolstra
- Drop the store expression. So now a substitute is just a command-line invocation (a program name + arguments). If you register a substitute you are responsible for registering the expression that built it (if any) as a root of the garbage collector. - Drop the substitutes-rev DB table.
2004-02-14* The environment variable NIX_ROOT can now be set to execute Nix in aEelco Dolstra
chroot() environment. * A operation `--validpath' to register path validity. Useful for bootstrapping in a pure Nix environment. * Safety checks: ensure that files involved in store operations are in the store.
2003-11-18* "Fix expression" -> "Nix expression".Eelco Dolstra
* More refactoring.