* 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.

1 files changed, 62 insertions, 0 deletions

diff --git a/src/libstore/derivations.hh b/src/libstore/derivations.hh
new file mode 100644
index 000000000000..c264981d265c
--- /dev/null
+++ b/src/libstore/derivations.hh
@@ -0,0 +1,62 @@
+#ifndef __DERIVATIONS_H
+#define __DERIVATIONS_H
+
+#include "aterm.hh"
+#include "store.hh"
+
+
+/* Extension of derivations in the Nix store. */
+const string drvExtension = ".drv";
+
+
+/* Abstract syntax of derivations. */
+
+struct DerivationOutput
+{
+    Path path;
+    string hashAlgo; /* hash used for expected hash computation */
+    string hash; /* expected hash, may be null */
+    DerivationOutput()
+    {
+    }
+    DerivationOutput(Path path, string hashAlgo, string hash)
+    {
+        this->path = path;
+        this->hashAlgo = hashAlgo;
+        this->hash = hash;
+    }
+};
+
+typedef map<string, DerivationOutput> DerivationOutputs;
+typedef map<string, string> StringPairs;
+
+struct Derivation
+{
+    DerivationOutputs outputs; /* keyed on symbolic IDs */
+    PathSet inputDrvs; /* inputs that are sub-derivations */
+    PathSet inputSrcs; /* inputs that are sources */
+    string platform;
+    Path builder;
+    Strings args;
+    StringPairs env;
+};
+
+
+/* Hash an aterm. */
+Hash hashTerm(ATerm t);
+
+/* Write a derivation to the Nix store, and return its path. */
+Path writeDerivation(const Derivation & drv, const string & name);
+
+/* Parse a derivation. */
+Derivation parseDerivation(ATerm t);
+
+/* Parse a derivation. */
+ATerm unparseDerivation(const Derivation & drv);
+
+/* Check whether a file name ends with the extensions for
+   derivations. */
+bool isDerivation(const string & fileName);
+
+
+#endif /* !__DERIVATIONS_H */