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* Get rid of identifiers since they are redundant now. This greatly

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simplifies stuff.

* The format of Nix expressions and the database schema changed
  because of this, so it's best to delete old Nix installations.
This commit is contained in:
Eelco Dolstra 2003-10-08 15:06:59 +00:00
parent b9f4942bd2
commit 6baa2c4420
23 changed files with 485 additions and 631 deletions
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41
src/store.hh
View file

@ -9,44 +9,27 @@
using namespace std;
typedef Hash FSId;
typedef set<FSId> FSIdSet;
/* Copy a path recursively. */
void copyPath(string src, string dst);
void copyPath(const Path & src, const Path & dst);
/* Register a substitute. */
void registerSubstitute(const FSId & srcId, const FSId & subId);
void registerSubstitute(const Path & srcPath, const Path & subPath);
/* Register a path keyed on its id. */
void registerPath(const Transaction & txn,
const string & path, const FSId & id);
/* Register the validity of a path. */
void registerValidPath(const Transaction & txn, const Path & path);
/* Query the id of a path. */
bool queryPathId(const string & path, FSId & id);
/* Unregister the validity of a path. */
void unregisterValidPath(const Path & path);
/* Return a path whose contents have the given hash. If target is
not empty, ensure that such a path is realised in target (if
necessary by copying from another location). If prefix is not
empty, only return a path that is an descendent of prefix.
/* Checks whether a path is valid. */
bool isValidPath(const Path & path);
The list of pending ids are those that already being expanded.
This prevents infinite recursion for ids realised through a
substitute (since when we build the substitute, we would first try
to expand the id... kaboom!). */
string expandId(const FSId & id, const string & target = "",
const string & prefix = "/", FSIdSet pending = FSIdSet(),
bool ignoreSubstitutes = false);
/* Copy a file to the nixStore directory and register it in dbRefs.
Return the hash code of the value. */
void addToStore(string srcPath, string & dstPath, FSId & id,
bool deterministicName = false);
/* Copy the contents of a path to the store and register the validity
the resulting path. The resulting path is returned. */
Path addToStore(const Path & srcPath);
/* Delete a value from the nixStore directory. */
void deleteFromStore(const string & path);
void deleteFromStore(const Path & path);
void verifyStore();