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lix/src/libstore/misc.cc

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* Renamed `normalise.cc' -> `build.cc', `storeexprs.cc' -> `derivations.cc', etc. * Store the SHA-256 content hash of store paths in the database after they have been built/added. This is so that we can check whether the store has been messed with (a la `rpm --verify'). * When registering path validity, verify that the closure property holds.
2005-01-19 16:39:47 +00:00
#include "build.hh"
* 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
* Started removing closure store expressions, i.e., the explicit representation of closures as ATerms in the Nix store. Instead, the file system pointer graph is now stored in the Nix database. This has many advantages: - It greatly simplifies the implementation (we can drop the notion of `successors', and so on). - It makes registering roots for the garbage collector much easier. Instead of specifying the closure expression as a root, you can simply specify the store path that must be retained as a root. This could not be done previously, since there was no way to find the closure store expression containing a given store path. - Better traceability: it is now possible to query what paths are referenced by a path, and what paths refer to a path.
2005-01-19 11:16:11 +00:00
Derivation derivationFromPath(const Path & drvPath)
* 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
{
* Started removing closure store expressions, i.e., the explicit representation of closures as ATerms in the Nix store. Instead, the file system pointer graph is now stored in the Nix database. This has many advantages: - It greatly simplifies the implementation (we can drop the notion of `successors', and so on). - It makes registering roots for the garbage collector much easier. Instead of specifying the closure expression as a root, you can simply specify the store path that must be retained as a root. This could not be done previously, since there was no way to find the closure store expression containing a given store path. - Better traceability: it is now possible to query what paths are referenced by a path, and what paths refer to a path.
2005-01-19 11:16:11 +00:00
assertStorePath(drvPath);
ensurePath(drvPath);
ATerm t = ATreadFromNamedFile(drvPath.c_str());
if (!t) throw Error(format("cannot read aterm from `%1%'") % drvPath);
return parseDerivation(t);
* 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
}
* Started removing closure store expressions, i.e., the explicit representation of closures as ATerms in the Nix store. Instead, the file system pointer graph is now stored in the Nix database. This has many advantages: - It greatly simplifies the implementation (we can drop the notion of `successors', and so on). - It makes registering roots for the garbage collector much easier. Instead of specifying the closure expression as a root, you can simply specify the store path that must be retained as a root. This could not be done previously, since there was no way to find the closure store expression containing a given store path. - Better traceability: it is now possible to query what paths are referenced by a path, and what paths refer to a path.
2005-01-19 11:16:11 +00:00
void computeFSClosure(const Path & storePath,
PathSet & paths)
{
if (paths.find(storePath) != paths.end()) return;
paths.insert(storePath);
PathSet references;
queryReferences(storePath, references);
for (PathSet::iterator i = references.begin();
i != references.end(); ++i)
computeFSClosure(*i, paths);
}
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
void storePathRequisites(const Path & storePath,
bool includeOutputs, PathSet & paths)
* 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
{
checkInterrupt();
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
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if (paths.find(storePath) != paths.end()) return;
* 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
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
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if (isDerivation(storePath)) {
* 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
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
paths.insert(storePath);
Derivation drv = derivationFromPath(storePath);
* 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
* Another change to low-level derivations. The last one this year, I promise :-) This allows derivations to specify on *what* output paths of input derivations they are dependent. This helps to prevent unnecessary downloads. For instance, a build might be dependent on the `devel' and `lib' outputs of some library component, but not the `docs' output.
2005-01-20 14:10:19 +00:00
for (DerivationInputs::iterator i = drv.inputDrvs.begin();
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
i != drv.inputDrvs.end(); ++i)
* Another change to low-level derivations. The last one this year, I promise :-) This allows derivations to specify on *what* output paths of input derivations they are dependent. This helps to prevent unnecessary downloads. For instance, a build might be dependent on the `devel' and `lib' outputs of some library component, but not the `docs' output.
2005-01-20 14:10:19 +00:00
/* !!! Maybe this is too strict, since it will include
*all* output paths of the input derivation, not just
the ones needed by this derivation. */
storePathRequisites(i->first, includeOutputs, paths);
* 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
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
for (PathSet::iterator i = drv.inputSrcs.begin();
i != drv.inputSrcs.end(); ++i)
storePathRequisites(*i, includeOutputs, paths);
* 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
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
if (includeOutputs) {
* 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
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
for (DerivationOutputs::iterator i = drv.outputs.begin();
i != drv.outputs.end(); ++i)
if (isValidPath(i->second.path))
storePathRequisites(i->second.path, includeOutputs, paths);
* 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
* Change extension `.store' to `.drv'. * Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
}
}
else {
computeFSClosure(storePath, paths);
}
* 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
}
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