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2005-01-17 * Actually check that the result of fixed-output derivations matchesEelco Dolstra1-0/+25
the specified hash.
2005-01-17 * Removed the `id' attribute hack.Eelco Dolstra7-33/+103
* Formalise the notion of fixed-output derivations, i.e., derivations for which a cryptographic hash of the output is known in advance. Changes to such derivations should not propagate upwards through the dependency graph. Previously this was done by specifying the hash component of the output path through the `id' attribute, but this is insecure since you can lie about it (i.e., you can specify any hash and then produce a completely different output). Now the responsibility for checking the output is moved from the builder to Nix itself. A fixed-output derivation can be created by specifying the `outputHash' and `outputHashAlgo' attributes, the latter taking values `md5', `sha1', and `sha256', and the former specifying the actual hash in hexadecimal or in base-32 (auto-detected by looking at the length of the attribute value). MD5 is included for compatibility but should be considered deprecated. * Removed the `drvPath' pseudo-attribute in derivation results. It's no longer necessary. * Cleaned up the support for multiple output paths in derivation store expressions. Each output now has a unique identifier (e.g., `out', `devel', `docs'). Previously there was no way to tell output paths apart at the store expression level. * `nix-hash' now has a flag `--base32' to specify that the hash should be printed in base-32 notation. * `fetchurl' accepts parameters `sha256' and `sha1' in addition to `md5'. * `nix-prefetch-url' now prints out a SHA-1 hash in base-32. (TODO: a flag to specify the hash.)
2005-01-14 * Shorten SHA-256 hashes used in store path name generation to 160Eelco Dolstra2-9/+11
bits, then encode them in a radix-32 representation (using digits and letters except e, o, u, and t). This produces store paths like /nix/store/4i0zb0z7f88mwghjirkz702a71dcfivn-aterm-2.3.1. The nice thing about this is that the hash part of the file name is still 32 characters, as before with MD5. (Of course, shortening SHA-256 to 160 bits makes it no better than SHA-160 in theory, but hopefully it's a bit more resistant to attacks; it's certainly a lot slower.)
2005-01-14 * Start move towards SHA-256 hashes instead of MD5.Eelco Dolstra4-24/+41
* Start cleaning up unique store path generation (they weren't always unique; in particular the suffix ("-aterm-2.2", "-builder.sh") was not part of the hash, therefore changes to the suffix would cause multiple store objects with the same hash).
2005-01-13 * Added SHA-1 support. `nix-hash' now has an option `--type sha1' toEelco Dolstra2-2/+2
select SHA-1 hashing.
2005-01-13 * Refactoring to support SHA-1.Eelco Dolstra1-1/+1
2005-01-04 * Cygwin compatibility.Eelco Dolstra1-0/+1
2004-12-20 * An operation `nix-store --clear-substitutes' to remove allEelco Dolstra1-8/+35
registered substitute mappings.
2004-12-20 * Simplify the substitute mechanism:Eelco Dolstra3-121/+28
- 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.
2004-11-29 * utime() follows symlinks, so don't change the mtime if the file is aEelco Dolstra1-7/+8
symlink.
2004-11-29 * Remove debug statement.Eelco Dolstra1-2/+0
2004-11-29 * Canonicalise metadata of all files in store paths (set the mtime toEelco Dolstra1-2/+58
0, set the mode to either 444 or 555, set the group to the default).
2004-11-03 * string2ATerm -> overloaded toATerm.Eelco Dolstra1-7/+7
2004-10-29 * Drop ATmake / ATMatcher also in handling store expressions.Eelco Dolstra3-31/+46
2004-10-25 * Allow certain operations to succeed even if we don't have writeEelco Dolstra6-10/+42
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.
2004-09-22 * Make store objects created by substitutes read-only.Eelco Dolstra1-0/+2
2004-09-12 * Fallback didn't work for subderivations of an unnormalised the mainEelco Dolstra1-44/+7
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.
2004-09-09 * Remove write permission from store objects after they have beenEelco Dolstra1-0/+4
added to the store. Bug reported by Martin.
2004-09-09 * A very dirty hack to make setuid installations a bit nicer to use.Eelco Dolstra1-2/+9
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).
2004-08-31 * Main the `substitutes-rev' table again, but now in a way thatEelco Dolstra2-20/+36
doesn't take \Theta(n^2) space/time complexity.
2004-08-31 * Quadruple the Berkeley DB locking limits to get rid of out of memoryEelco Dolstra1-2/+21
errors while running `nix-store --verify'.
2004-08-30 * Removed nrWaitees field. It was redundant with waitees.size() andEelco Dolstra1-24/+5
could get out of sync if multiple input derivations mapped to the same closure expression (since waitees is a set).
2004-08-25 * `--min-age' flag in nix-store and nix-collect-garbage to only deleteEelco Dolstra2-3/+20
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 * Put the garbage collector in nix-store: operation `--gc',Eelco Dolstra5-6/+110
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'.
2004-08-18 * The default verbosity level of all Nix commands is now lvlInfo.Eelco Dolstra1-1/+1
* 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.
2004-08-11 * The predecessor of a successor need not be present. This inEelco Dolstra1-4/+6
particular happens on distributed builds or when using push/pull.
2004-08-05 * Clean up the temporary directory for hook communication (and don'tEelco Dolstra1-0/+1
print out incorrect "build failed" messages).
2004-08-04 * Creating a file nix-support/no-scan in the output path of aEelco Dolstra1-2/+5
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.
2004-07-06 * Fixed format string error.Eelco Dolstra1-1/+1
2004-07-01 * Don't go into a (sometimes infinite) loop calling the build hook.Eelco Dolstra1-16/+24
2004-07-01 * Include some missing headers.Eelco Dolstra1-0/+1
2004-06-29 * Write build logs to disk again.Eelco Dolstra1-1/+29
2004-06-28 * In a realisation goal, check the result of the correspondingEelco Dolstra1-0/+6
normalisation goal.
2004-06-28 * Added a switch `--fallback'. From the manual:Eelco Dolstra8-48/+149
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).
2004-06-25 * A flag `--keep-going / -k' to keep building goals if one fails, asEelco Dolstra3-130/+157
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 * Don't throw an exception when a build fails. Just terminate theEelco Dolstra1-58/+214
goal and allow the problem to be handled elsewhere (e.g., at top-level).
2004-06-24 * Obsolete.Eelco Dolstra1-162/+0
2004-06-24 * Multiple and/or failing substitutes now work.Eelco Dolstra1-12/+42
2004-06-22 * ArghhhhhhEelco Dolstra1-1/+1
2004-06-22 * Some more diagnostics changes.Eelco Dolstra1-23/+39
2004-06-22 * Well, it's better than printf.Eelco Dolstra1-1/+1
2004-06-22 * Started making Nix's diagnostic messages a bit more useful.Eelco Dolstra1-10/+26
2004-06-22 * Put WEXITSTATUS stuff somewhere else.Eelco Dolstra2-3/+3
2004-06-22 * Reduce gratuitous cut & pasting.Eelco Dolstra1-68/+55
2004-06-22 * Wrapper class around pids.Eelco Dolstra2-87/+37
2004-06-22 * Substitutes should occupy a build slot.Eelco Dolstra1-1/+15
2004-06-22 * Refactoring.Eelco Dolstra2-20/+7
2004-06-21 * Acquire a lock on the output path when running a substitute. AlsoEelco Dolstra1-0/+22
delete obstructing invalid paths.
2004-06-21 * Ugh, nasty Heisenbug due to an uninitialiased variable. The bugEelco Dolstra1-0/+1
only caused a crash if the program was *not* invoked with a high verbosity level.
2004-06-21 * Remove obstructing invalid store paths add[Text]ToStore().Eelco Dolstra1-0/+6