Commit graph

85 commits

Author SHA1 Message Date
Eelco Dolstra f17553a212 * Remove debug statement. 2004-11-29 15:30:44 +00:00
Eelco Dolstra 4115d8d8ce * Canonicalise metadata of all files in store paths (set the mtime to
0, set the mode to either 444 or 555, set the group to the default).
2004-11-29 15:09:29 +00:00
Eelco Dolstra cb7ccb528b * string2ATerm -> overloaded toATerm. 2004-11-03 18:12:03 +00:00
Eelco Dolstra a69534fc21 * Drop ATmake / ATMatcher also in handling store expressions. 2004-10-29 11:22:49 +00:00
Eelco Dolstra f4d44a0026 * Allow certain operations to succeed even if we don't have write
permission to the Nix store or database.  E.g., `nix-env -qa' will
  work, but `nix-env -qas' won't (the latter needs DB access).  The
  option `--readonly-mode' forces this mode; otherwise, it's only
  activated when the database cannot be opened.
2004-10-25 14:38:23 +00:00
Eelco Dolstra 1317242780 * Make store objects created by substitutes read-only. 2004-09-22 12:15:04 +00:00
Eelco Dolstra b357284a32 * Fallback didn't work for subderivations of an unnormalised the main
derivation, since NormalisationGoal would first run a
  NormalisationGoal on the subderivation (a no-op, since in a
  situation where we need fallback the successor is known), and then
  runs a RealisationGoal on the normal form, which then cannot do a
  fallback because it doesn't know the derivation expression for which
  it is a normal form.

  Tossed out the 2-phase normalisation/realisation in
  NormalisationGoal and SubstitutionGoal since it's no longer needed -
  a RealisationGoal will run a NormalisationGoal if necessary.
2004-09-12 19:08:57 +00:00
Eelco Dolstra c16be6ac92 * Remove write permission from store objects after they have been
added to the store.  Bug reported by Martin.
2004-09-09 21:19:20 +00:00
Eelco Dolstra 47f87072ad * A very dirty hack to make setuid installations a bit nicer to use.
Previously there was the problem that all files read by nix-env
  etc. should be reachable and readable by the Nix user.  So for
  instance building a Nix expression in your home directory meant that
  the home directory should have at least g+x or o+x permission so
  that the Nix user could reach the Nix expression.  Now we just
  switch back to the original user just prior to reading sources and
  the like.  The places where this happens are somewhat arbitrary,
  however.  Any scope that has a live SwitchToOriginalUser object in
  it is executed as the original user.

* Back out r1385.  setreuid() sets the saved uid to the new
  real/effective uid, which prevents us from switching back to the
  original uid.  setresuid() doesn't have this problem (although the
  manpage has a bug: specifying -1 for the saved uid doesn't leave it
  unchanged; an explicit value must be specified).
2004-09-09 21:12:53 +00:00
Eelco Dolstra 5c443b6550 * Main the `substitutes-rev' table again, but now in a way that
doesn't take \Theta(n^2) space/time complexity.
2004-08-31 16:13:10 +00:00
Eelco Dolstra c25f2883b1 * Quadruple the Berkeley DB locking limits to get rid of out of memory
errors while running `nix-store --verify'.
2004-08-31 10:50:08 +00:00
Eelco Dolstra fe122c5a15 * Removed nrWaitees field. It was redundant with waitees.size() and
could get out of sync if multiple input derivations mapped to the
  same closure expression (since waitees is a set).
2004-08-30 11:51:36 +00:00
Eelco Dolstra eb233e728f * `--min-age' flag in nix-store and nix-collect-garbage to only delete
unreachable paths that haven't been used for N hours.  For instance,
  `nix-collect-garbage --min-age 168' only deletes paths that haven't
  been accessed in the last week.

  This is useful for instance in the build farm where many derivations
  can be shared between consecutive builds, and we wouldn't want a
  garbage collect to throw them all away.  We could of course register
  them as roots, but then we'd to unregister them at some point, which
  would be a pain to manage.  The `--min-age' flag gives us a sort of
  MRU caching scheme.

  BUG: this really shouldn't be in gc.cc since that violates
  mechanism/policy separation.
2004-08-25 16:54:08 +00:00
Eelco Dolstra 818047881e * Put the garbage collector in nix-store: operation `--gc',
suboperations `--print-live', `--print-dead', and `--delete'.  The
  roots are not determined by nix-store; they are read from standard
  input.  This is to make it easy to customise what the roots are.

  The collector now no longer fails when store expressions are missing
  (which legally happens when using substitutes).  It never tries to
  fetch paths through substitutes.

  TODO: acquire a global lock on the store while garbage collecting.
  
* Removed `nix-store --delete'.
2004-08-25 11:43:49 +00:00
Eelco Dolstra 1eddee59f2 * The default verbosity level of all Nix commands is now lvlInfo.
* Builder output is written to standard error by default.
  * The option `-B' is gone.
  * The option `-Q' suppresses builder output.

The result of this is that most Nix invocations shouldn't need any
flags w.r.t. logging.
2004-08-18 12:19:06 +00:00
Eelco Dolstra 62fe5c4a22 * The predecessor of a successor need not be present. This in
particular happens on distributed builds or when using push/pull.
2004-08-11 19:03:13 +00:00
Eelco Dolstra ae1a1efa41 * Clean up the temporary directory for hook communication (and don't
print out incorrect "build failed" messages).
2004-08-05 14:53:27 +00:00
Eelco Dolstra e3a50f7e25 * Creating a file nix-support/no-scan in the output path of a
derivation disables scanning for dependencies.  Use at your own
  risk.  This is a quick hack to speed up UML image generation (image
  are very big, say 1 GB).

  It would be better if the scanner were faster, and didn't read the
  whole file into memory.
2004-08-04 09:25:21 +00:00
Eelco Dolstra c1a18f543e * Fixed format string error. 2004-07-06 11:21:34 +00:00
Eelco Dolstra 056cd1d3b7 * Don't go into a (sometimes infinite) loop calling the build hook. 2004-07-01 16:24:35 +00:00
Eelco Dolstra b584253af4 * Include some missing headers. 2004-07-01 11:11:16 +00:00
Eelco Dolstra f5d5ffe536 * Write build logs to disk again. 2004-06-29 09:41:50 +00:00
Eelco Dolstra 4d2946c516 * In a realisation goal, check the result of the corresponding
normalisation goal.
2004-06-28 13:51:24 +00:00
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 b113edeab7 * A flag `--keep-going / -k' to keep building goals if one fails, as
much as possible.  (This is similar to GNU Make's `-k' flag.)

* Refactoring to implement this: previously we just bombed out when
  a build failed, but now we have to clean up.  In particular this
  means that goals must be freed quickly --- they shouldn't hang
  around until the worker exits.  So the worker now maintains weak
  pointers in order not to prevent garbage collection.

* Documented the `-k' and `-j' flags.
2004-06-25 15:36:09 +00:00
Eelco Dolstra e4883211f9 * Don't throw an exception when a build fails. Just terminate the
goal and allow the problem to be handled elsewhere (e.g., at
  top-level).
2004-06-25 10:21:44 +00:00
Eelco Dolstra 795d9f8b08 * Obsolete. 2004-06-24 14:36:50 +00:00
Eelco Dolstra ec32627621 * Multiple and/or failing substitutes now work. 2004-06-24 13:40:38 +00:00
Eelco Dolstra 66c7f34759 * Arghhhhhh 2004-06-22 17:07:32 +00:00
Eelco Dolstra 05a5362d63 * Some more diagnostics changes. 2004-06-22 17:04:10 +00:00
Eelco Dolstra 83ae1723da * Well, it's better than printf. 2004-06-22 15:01:01 +00:00
Eelco Dolstra 72bc9a522f * Started making Nix's diagnostic messages a bit more useful. 2004-06-22 14:48:59 +00:00
Eelco Dolstra 5e2cf44a4d * Put WEXITSTATUS stuff somewhere else. 2004-06-22 11:03:41 +00:00
Eelco Dolstra 84007a0958 * Reduce gratuitous cut & pasting. 2004-06-22 10:21:44 +00:00
Eelco Dolstra c9fbd2dfd5 * Wrapper class around pids. 2004-06-22 09:51:44 +00:00
Eelco Dolstra 155d7c8dfa * Substitutes should occupy a build slot. 2004-06-22 09:00:31 +00:00
Eelco Dolstra c4cb6ea2bc * Refactoring. 2004-06-22 08:50:25 +00:00
Eelco Dolstra 3f3a3ae87b * Acquire a lock on the output path when running a substitute. Also
delete obstructing invalid paths.
2004-06-21 09:35:50 +00:00
Eelco Dolstra 72c857f0eb * Ugh, nasty Heisenbug due to an uninitialiased variable. The bug
only caused a crash if the program was *not* invoked with a high
  verbosity level.
2004-06-21 08:51:55 +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 15c60ca1b6 * Disable calls to fsync() since Berkeley DB's DB_TXN_WRITE_NOSYNC
flag doesn't seem to work as advertised.
2004-06-21 07:36:01 +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 85ae781765 * Refactoring. 2004-06-20 13:37:51 +00:00
Eelco Dolstra 23bb902d1f * Re-enable build hooks. 2004-06-19 21:45:04 +00:00
Eelco Dolstra 41ec982f31 * Big refactoring. Move to a much more explicitly state machine based
approach.  This makes it much easier to add extra complexity in the
  normaliser / realiser (e.g., build hooks, substitutes).
2004-06-18 18:09:32 +00:00
Eelco Dolstra 0b70231b9d * Refactoring. 2004-06-15 13:49:42 +00:00
Eelco Dolstra 1bc6afefac * Cleanup. 2004-06-08 13:21:03 +00:00
Eelco Dolstra 5e4a2272bf * Drain the output of the build hook to show error messages. Ugly
hack.
2004-05-18 14:52:35 +00:00
Eelco Dolstra 8e9fd57ef9 * setpgrp() is not POSIX (and on Mac OS X it's different than on
Linux), so use setpgid().
2004-05-18 09:45:18 +00:00