From a5a90f501e471383a8dfccfe8af3c804cefa77cf Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 8 Jul 2003 08:35:06 +0000
Subject: [PATCH] * Get rid of the `netsources' database. * Rename the `refs'
 database to `hash2paths'.

---
 src/globals.cc |  6 ++----
 src/globals.hh | 19 ++++---------------
 src/store.cc   |  8 ++++----
 3 files changed, 10 insertions(+), 23 deletions(-)

diff --git a/src/globals.cc b/src/globals.cc
index a81c90caa..40a5a981b 100644
--- a/src/globals.cc
+++ b/src/globals.cc
@@ -2,9 +2,8 @@
 #include "db.hh"
 
 
-string dbRefs = "refs";
+string dbHash2Paths = "hash2paths";
 string dbSuccessors = "successors";
-string dbNetSources = "netsources";
 
 string nixStore = "/UNINIT";
 string nixLogDir = "/UNINIT";
@@ -13,7 +12,6 @@ string nixDB = "/UNINIT";
 
 void initDB()
 {
-    createDB(nixDB, dbRefs);
+    createDB(nixDB, dbHash2Paths);
     createDB(nixDB, dbSuccessors);
-    createDB(nixDB, dbNetSources);
 }
diff --git a/src/globals.hh b/src/globals.hh
index 8c6a763c4..2fb9fe747 100644
--- a/src/globals.hh
+++ b/src/globals.hh
@@ -8,11 +8,11 @@ using namespace std;
 
 /* Database names. */
 
-/* dbRefs :: Hash -> Path
+/* dbHash2Paths :: Hash -> [Path]
 
-   Maintains a mapping from hashes to paths.  This is what we use to
-   resolve CHash(hash) content descriptors. */
-extern string dbRefs;
+   Maintains a mapping from hashes to lists of paths.  This is what we
+   use to resolve Hash(hash) content descriptors. */
+extern string dbHash2Paths;
 
 /* dbSuccessors :: Hash -> Hash
 
@@ -30,17 +30,6 @@ extern string dbRefs;
 */
 extern string dbSuccessors;
 
-/* dbNetSources :: Hash -> URL
-
-   Each pair (hash, url) in this mapping states that the value
-   identified by hash can be obtained by fetching the value pointed
-   to by url.
-
-   TODO: this should be Hash -> [URL]
-
-   TODO: factor this out into a separate tool? */
-extern string dbNetSources;
-
 
 /* Path names. */
 
diff --git a/src/store.cc b/src/store.cc
index 977cd2594..2ea7586e9 100644
--- a/src/store.cc
+++ b/src/store.cc
@@ -90,7 +90,7 @@ Hash registerPath(const string & _path, Hash hash)
     if (hash == Hash()) hash = hashPath(path);
 
     Strings paths;
-    queryListDB(nixDB, dbRefs, hash, paths); /* non-existence = ok */
+    queryListDB(nixDB, dbHash2Paths, hash, paths); /* non-existence = ok */
 
     for (Strings::iterator it = paths.begin();
          it != paths.end(); it++)
@@ -98,7 +98,7 @@ Hash registerPath(const string & _path, Hash hash)
     
     paths.push_back(path);
     
-    setListDB(nixDB, dbRefs, hash, paths);
+    setListDB(nixDB, dbHash2Paths, hash, paths);
     
  exists:
     return hash;
@@ -116,7 +116,7 @@ static string queryPathByHashPrefix(Hash hash, const string & prefix)
 {
     Strings paths;
 
-    if (!queryListDB(nixDB, dbRefs, hash, paths))
+    if (!queryListDB(nixDB, dbHash2Paths, hash, paths))
         throw Error(format("no paths known with hash `%1%'") % (string) hash);
 
     /* Arbitrarily pick the first one that exists and still hash the
@@ -172,5 +172,5 @@ void deleteFromStore(const string & path)
     if (string(path, 0, prefix.size()) != prefix)
         throw Error(format("path %1% is not in the store") % path);
     deletePath(path);
-//     delDB(nixDB, dbRefs, hash);
+//     delDB(nixDB, dbHash2Paths, hash);
 }