Add snap-stageN targets.

Author: graydon

mk/snap.mk

@@ -1,3 +1,10 @@
 
-snap:
-	$(CFG_SRC_DIR)src/etc/make-snapshot.py
+snap-stage1: stage1/rustc stage1/glue.o stage1/$(CFG_STDLIB)
+	$(CFG_SRC_DIR)src/etc/make-snapshot.py stage1
+
+snap-stage2: stage2/rustc stage2/glue.o stage2/$(CFG_STDLIB)
+	$(CFG_SRC_DIR)src/etc/make-snapshot.py stage2
+
+snap-stage3: stage3/rustc stage3/glue.o stage3/$(CFG_STDLIB)
+	$(CFG_SRC_DIR)src/etc/make-snapshot.py stage3
+

src/etc/make-snapshot.py

@@ -1,4 +1,4 @@
 #!/usr/bin/env python
 
-import snapshot
-print(snapshot.make_snapshot())
+import snapshot, sys
+print(snapshot.make_snapshot(sys.argv[1]))

src/etc/snapshot.py

@@ -102,7 +102,7 @@ def hash_file(x):
     return scrub(h.hexdigest())
 
 
-def make_snapshot():
+def make_snapshot(stage):
     kernel = get_kernel()
     platform = get_platform()
     rev = local_rev_short_sha()
@@ -112,7 +112,7 @@ def make_snapshot():
 
     tar = tarfile.open(file0, "w:bz2")
     for name in snapshot_files[kernel]:
-      tar.add(os.path.join("stage2", name),
+      tar.add(os.path.join(stage, name),
               "rust-stage0/" + name)
     tar.close()