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-rw-r--r--src/libstore/build.cc3
-rw-r--r--src/libstore/store.cc17
-rw-r--r--src/libstore/store.hh5
3 files changed, 18 insertions, 7 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 3785c7da7..e71201785 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1502,7 +1502,8 @@ void SubstitutionGoal::finished()
Transaction txn;
createStoreTransaction(txn);
- registerValidPath(txn, storePath, contentHash, references, "");
+ registerValidPath(txn, storePath, contentHash,
+ references, sub.deriver);
txn.commit();
outputLock->setDeletion(true);
diff --git a/src/libstore/store.cc b/src/libstore/store.cc
index 83577e4fb..5516dc801 100644
--- a/src/libstore/store.cc
+++ b/src/libstore/store.cc
@@ -391,6 +391,9 @@ Path queryDeriver(const Transaction & txn, const Path & storePath)
}
+const int substituteVersion = 2;
+
+
static Substitutes readSubstitutes(const Transaction & txn,
const Path & srcPath)
{
@@ -406,13 +409,15 @@ static Substitutes readSubstitutes(const Transaction & txn,
break;
}
Strings ss2 = unpackStrings(*i);
- if (ss2.size() == 3) {
- /* Another old-style substitute. */
- continue;
- }
- if (ss2.size() != 2) throw Error("malformed substitute");
+ if (ss2.size() == 0) continue;
+ int version;
+ if (!string2Int(ss2.front(), version)) continue;
+ if (version != substituteVersion) continue;
+ if (ss2.size() != 4) throw Error("malformed substitute");
Strings::iterator j = ss2.begin();
+ j++;
Substitute sub;
+ sub.deriver = *j++;
sub.program = *j++;
sub.args = unpackStrings(*j++);
subs.push_back(sub);
@@ -431,6 +436,8 @@ static void writeSubstitutes(const Transaction & txn,
i != subs.end(); ++i)
{
Strings ss2;
+ ss2.push_back((format("%1%") % substituteVersion).str());
+ ss2.push_back(i->deriver);
ss2.push_back(i->program);
ss2.push_back(packStrings(i->args));
ss.push_back(packStrings(ss2));
diff --git a/src/libstore/store.hh b/src/libstore/store.hh
index 082fc9de4..3b18664de 100644
--- a/src/libstore/store.hh
+++ b/src/libstore/store.hh
@@ -16,7 +16,10 @@ const int nixSchemaVersion = 2;
path (typically by fetching it from somewhere, e.g., from the
network). */
struct Substitute
-{
+{
+ /* The derivation that built this store path (empty if none). */
+ Path deriver;
+
/* Program to be executed to create the store path. Must be in
the output path of `storeExpr'. */
Path program;