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17 commits

Author SHA1 Message Date
Eelco Dolstra 91dc023665 * Added a switch `--fallback'. From the manual:
Whenever Nix attempts to realise a derivation for which a closure is
  already known, but this closure cannot be realised, fall back on
  normalising the derivation.

  The most common scenario in which this is useful is when we have
  registered substitutes in order to perform binary distribution from,
  say, a network repository.  If the repository is down, the
  realisation of the derivation will fail.  When this option is
  specified, Nix will build the derivation instead.  Thus, binary
  installation falls back on a source installation.  This option is
  not the default since it is generally not desirable for a transient
  failure in obtaining the substitutes to lead to a full build from
  source (with the related consumption of resources).
2004-06-28 10:42:57 +00:00
Eelco Dolstra 5e2cf44a4d * Put WEXITSTATUS stuff somewhere else. 2004-06-22 11:03:41 +00:00
Eelco Dolstra c9fbd2dfd5 * Wrapper class around pids. 2004-06-22 09:51:44 +00:00
Eelco Dolstra c4cb6ea2bc * Refactoring. 2004-06-22 08:50:25 +00:00
Eelco Dolstra be1a917beb * Remove obstructing invalid store paths add[Text]ToStore(). 2004-06-21 07:46:02 +00:00
Eelco Dolstra daf0a923c7 * Wrap calls to registerSubstitute() in a single transaction to
improve throughput.
* Don't build the `substitute-rev' table for now, since it caused
  Theta(N^2) time and log file consumption when adding N substitutes.
  Maybe we can do without it.
2004-06-21 07:38:17 +00:00
Eelco Dolstra 112ee89501 * Re-enable support for substitutes in the normaliser.
* A better substitute mechanism.

  Instead of generating a store expression for each store path for
  which we have a substitute, we can have a single store expression
  that builds a generic program that is invoked to build the desired
  store path, which is passed as an argument.

  This means that operations like `nix-pull' only produce O(1) files
  instead of O(N) files in the store when registering N substitutes.
  (It consumes O(N) database storage, of course, but that's not a
  performance problem).

* Added a test for the substitute mechanism.
  
* `nix-store --substitute' reads the substitutes from standard input,
  instead of from the command line.  This prevents us from running
  into the kernel's limit on command line length.
2004-06-20 19:17:54 +00:00
Eelco Dolstra a4d2b22c8c * Be stricter in verifying store paths. 2004-04-14 08:08:55 +00:00
Eelco Dolstra 76c0e85929 * The environment variable NIX_ROOT can now be set to execute Nix in a
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.
2004-02-14 21:44:18 +00:00
Eelco Dolstra 447089a5f6 * Catch SIGINT to terminate cleanly when the user tries to interrupt
Nix.  This is to prevent Berkeley DB from becoming wedged.

  Unfortunately it is not possible to throw C++ exceptions from a
  signal handler.  In fact, you can't do much of anything except
  change variables of type `volatile sig_atomic_t'.  So we set an
  interrupt flag in the signal handler and check it at various
  strategic locations in the code (by calling checkInterrupt()).
  Since this is unlikely to cover all cases (e.g., (semi-)infinite
  loops), sometimes SIGTERM may now be required to kill Nix.
2004-01-15 20:23:55 +00:00
Eelco Dolstra 23fbc72f5d * Print error messages, not debug messages. 2004-01-13 11:53:12 +00:00
Eelco Dolstra 833f2fc92d * GCC 2.95 compatibility. 2003-12-22 16:40:46 +00:00
Eelco Dolstra cff6fd22eb * Allow successors that don't exist but have a substitute.
* Integrity: check in successor / substitute registration whether
  the target path exists or has a substitute.
2003-12-05 11:05:19 +00:00
Eelco Dolstra c9cb1fa21f * Bug fix in path invalidation.
* More consistency checks.
2003-11-24 09:24:52 +00:00
Eelco Dolstra ab0bc4999a * Maintain integrity of the substitute and successor mappings when
deleting a path in the store.
* Allow absolute paths in Nix expressions.
* Get nix-prefetch-url to work again.
* Various other fixes.
2003-11-22 18:45:56 +00:00
Eelco Dolstra 40d9eb14df * Fix the garbage collector. 2003-11-22 15:58:34 +00:00
Eelco Dolstra 9f0f020929 * libnix -> libstore. 2003-11-18 10:55:27 +00:00
Renamed from src/libnix/store.cc (Browse further)