* Really fix the substitute mechanism, i.e., ensure the closure

invariant by registering references through the manifest.
* Added a test for nix-pull.

tests/init.sh

@@ -13,6 +13,36 @@ mkdir "$NIX_LOG_DIR"
 mkdir "$NIX_STATE_DIR"
 mkdir "$NIX_DB_DIR"
 
+mkdir $NIX_BIN_DIR
+ln -s $TOP/src/nix-store/nix-store $NIX_BIN_DIR/
+ln -s $TOP/src/nix-instantiate/nix-instantiate $NIX_BIN_DIR/
+ln -s $TOP/src/nix-hash/nix-hash $NIX_BIN_DIR/
+ln -s $TOP/scripts/nix-prefetch-url $NIX_BIN_DIR/
+mkdir $NIX_BIN_DIR/nix
+ln -s $TOP/scripts/download-using-manifests.pl $NIX_BIN_DIR/nix/
+ln -s $TOP/scripts/readmanifest.pm $NIX_BIN_DIR/nix/
+
+mkdir -p "$NIX_LOCALSTATE_DIR"/nix/manifests
+mkdir -p "$NIX_LOCALSTATE_DIR"/log/nix
+
+mkdir $NIX_DATA_DIR/nix
+cp -prd $TOP/corepkgs $NIX_DATA_DIR/nix/
+# Bah, script has the prefix hard-coded.
+for i in $NIX_DATA_DIR/nix/corepkgs/nar/nar.sh \
+    $NIX_BIN_DIR/nix/download-using-manifests.pl \
+    $NIX_BIN_DIR/nix-prefetch-url \
+    ; do
+    echo "$REAL_BIN_DIR"
+    sed < $i > $i.tmp \
+        -e "s^$REAL_BIN_DIR^$NIX_BIN_DIR^" \
+        -e "s^$REAL_LIBEXEC_DIR^$NIX_LIBEXEC_DIR^" \
+        -e "s^$REAL_LOCALSTATE_DIR^$NIX_LOCALSTATE_DIR^" \
+        -e "s^$REAL_DATA_DIR^$NIX_DATA_DIR^" \
+        -e "s^$REAL_STORE_DIR^$NIX_STORE_DIR^"
+    mv $i.tmp $i
+    chmod +x $i
+done
+
 # Initialise the database.
 $TOP/src/nix-store/nix-store --init