From 73b163c1a10f2ce675d9fc3d7ad02fad4bc6511f Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Fri, 11 Jul 2003 08:41:03 +0000
Subject: [PATCH] * Fix a bug that caused Fix not to be deterministic (due to
 addToStore   returning different paths if the hash of the path to be added
 was   already available in the store under a different name).

---
 src/fix.cc   |  2 +-
 src/store.cc | 13 ++++++-------
 src/store.hh |  3 ++-
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/fix.cc b/src/fix.cc
index 5c4297bfb..445d68283 100644
--- a/src/fix.cc
+++ b/src/fix.cc
@@ -131,7 +131,7 @@ static Expr evalExpr(Expr e)
         string srcPath = searchPath(s1);
         string dstPath;
         Hash hash;
-        addToStore(srcPath, dstPath, hash);
+        addToStore(srcPath, dstPath, hash, true);
         return ATmake("Path(<str>, Hash(<str>), [])",
             dstPath.c_str(), ((string) hash).c_str());
     }
diff --git a/src/store.cc b/src/store.cc
index 435ac5cc6..12de50ec6 100644
--- a/src/store.cc
+++ b/src/store.cc
@@ -224,24 +224,23 @@ string expandHash(const Hash & hash, const string & target,
 }
 
     
-void addToStore(string srcPath, string & dstPath, Hash & hash)
+void addToStore(string srcPath, string & dstPath, Hash & hash,
+    bool deterministicName)
 {
     srcPath = absPath(srcPath);
-
     hash = hashPath(srcPath);
 
+    string baseName = baseNameOf(srcPath);
+    dstPath = canonPath(nixStore + "/" + (string) hash + "-" + baseName);
+
     try {
         /* !!! should not use the substitutes! */
-        dstPath = expandHash(hash, "", nixStore);
+        dstPath = expandHash(hash, deterministicName ? dstPath : "", nixStore);
         return;
     } catch (...) {
     }
     
-    string baseName = baseNameOf(srcPath);
-    dstPath = canonPath(nixStore + "/" + (string) hash + "-" + baseName);
-
     copyPath(srcPath, dstPath);
-
     registerPath(dstPath, hash);
 }
 
diff --git a/src/store.hh b/src/store.hh
index 8b41478a2..82fb2e12a 100644
--- a/src/store.hh
+++ b/src/store.hh
@@ -30,7 +30,8 @@ string expandHash(const Hash & hash, const string & target = "",
 
 /* 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, Hash & hash);
+void addToStore(string srcPath, string & dstPath, Hash & hash,
+    bool deterministicName = false);
 
 /* Delete a value from the nixStore directory. */
 void deleteFromStore(const string & path);