Commit graph

18 commits

Author SHA1 Message Date
Eelco Dolstra d6b6b2d3a8 * Delete obstructed paths prior to building. 2003-08-05 09:47:20 +00:00
Eelco Dolstra d2e963f7a3 * Path locking in addToStore() and expandPath(). 2003-08-04 07:09:36 +00:00
Eelco Dolstra c95b4ad290 * In normaliseFState(), wrap registration of the output paths and the
normal form in a single transaction to ensure that if we crash,
  either everything is registered or nothing is.  This is for
  recoverability: unregistered paths in the store can be deleted
  arbitrarily, while registered paths can only be deleted by running
  the garbage collector.
2003-08-01 15:41:47 +00:00
Eelco Dolstra d99d04e644 * Defensive programming against POSIX locking idiocy.
* Simplified realiseSlice().
2003-08-01 15:06:23 +00:00
Eelco Dolstra 545145cd58 * normaliseFState() now locks all output paths prior to building, thus
ensuring that simultaneous invocations of Nix don't clobber
  each other's  builds.

* Fixed a bug in `make install'.
2003-08-01 14:11:19 +00:00
Eelco Dolstra 06d3d7355d * Enclose most operations that update the database in transactions.
* Open all database tables (Db objects) at initialisation time, not
  every time they are used.  This is necessary because tables have to
  outlive all transactions that refer to them.
2003-07-31 16:05:35 +00:00
Eelco Dolstra 4a013962bd * Started using Berkeley DB environments. This is necessary for
transaction support (but we don't actually use transactions yet).
2003-07-31 13:47:13 +00:00
Eelco Dolstra 8846465934 * Get garbage collection and cache population to work *properly*.
Renamed `fstateRefs' to `fstateRequisites'.  The semantics of this
  function is that it returns a list of all paths necessary to realise
  a given expression.  For a derive expression, this is the union of
  requisites of the inputs; for a slice expression, it is the path of
  each element in the slice.  Also included are the paths of the
  expressions themselves.  Optionally, one can also include the
  requisites of successor expressions (to recycle intermediate
  results).

* `nix-switch' now distinguishes between an expression and its normal
  form.  Usually, only the normal form is registered as a root of the
  garbage collector.  With the `--source-root' flag, it will also
  register the original expression as a root.

* `nix-collect-garbage' now has a flag `--keep-successors' which
  causes successors not to be included in the list of garbage paths.

* `nix-collect-garbage' now has a flag `--invert' which will print all
  paths that should *not* be garbage collected.
2003-07-29 14:28:17 +00:00
Eelco Dolstra 79ba0431db * `fstateRefs' now works on derive expressions as well. TODO: make
this more efficient.
* A flag `-n' in 'nix --query' to normalise the argument.  Default is
  not to normalise.
2003-07-29 10:43:12 +00:00
Eelco Dolstra 5acb45446e * Let `nix --install' print out the id of the normal form.
* Some minor refactoring.
2003-07-29 09:45:03 +00:00
Eelco Dolstra f21b341957 * Fix message. 2003-07-24 15:03:36 +00:00
Eelco Dolstra 0a0c1fcb4d * The `-v' flag no longer takes an argument; it should be repeated
instead (e.g., `-vvvv' for lots of output).  Default is to only
  print error messages.
2003-07-24 13:43:16 +00:00
Eelco Dolstra 1a7468a57a * Debug levels. Use `--verbose / -v LEVEL' to display only messages
up to the given verbosity levels.  These currently are:

    lvlError = 0, 
    lvlNormal = 5,
    lvlDebug = 10,
    lvlDebugMore = 15

  although only lvlError and lvlDebug are actually used right now.
2003-07-24 08:53:43 +00:00
Eelco Dolstra e877c69d78 * Substitutes now should produce a path with the same id as they are
substituting for (obvious, really).

* For greater efficiency, nix-pull/unnar will place the output in a
  path that is probably the same as what is actually needed, thus
  preventing a path copy.

* Even if a output id is given in a Fix package expression, ensure
  that the resulting Nix derive expression has a different id.  This
  is because Nix expressions that are semantically equivalent (i.e.,
  build the same result) might be different w.r.t. efficiency or
  divergence.  It is absolutely vital for the substitute mechanism
  that such expressions are not used interchangeably.
2003-07-22 15:15:15 +00:00
Eelco Dolstra 2616e6a6f3 * Check for errors. 2003-07-21 20:58:34 +00:00
Eelco Dolstra 249988a787 * Allow the output/expression id to be forced to a certain
value; this potentially dangerous feature enables better 
  sharing for those paths for which the content is known in 
  advance (e.g., because a content hash is given).
* Fast builds: if we can expand all output paths of a derive 
  expression, we don't have to build.
2003-07-21 20:07:12 +00:00
Eelco Dolstra 49231fbe41 * Changes to the command line syntax of Nix.
* A function to find all Nix expressions whose output ids are
  completely contained in some set.  Useful for uploading relevant Nix
  expressions to a shared cache.
2003-07-21 14:46:01 +00:00
Eelco Dolstra 6f1a0f948d * Refactorings. 2003-07-20 19:29:38 +00:00