sstate: Allow sstate_clean_manifest to take a prefix

Manifest files containing the same duplicated prefix are wasteful on space
and ultimately this costs build time. Add support for manifest files with
common prefixes removed and use the prefix if the path isn't absolute.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index 0fdeb9dfe8defeb7d15a33826c2a931346135666..31789da50a03bedca440a3ffdf58fc4c6a5d1606 100644 (file)
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -426,7 +426,7 @@ def sstate_clean_cachefiles(d):
         ss = sstate_state_fromvars(ld, task)
         sstate_clean_cachefile(ss, ld)
 
-def sstate_clean_manifest(manifest, d):
+def sstate_clean_manifest(manifest, d, prefix=None):
     import oe.path
 
     mfile = open(manifest)
@@ -435,6 +435,8 @@ def sstate_clean_manifest(manifest, d):
 
     for entry in entries:
         entry = entry.strip()
+        if prefix and not entry.startswith("/"):
+            entry = prefix + "/" + entry
         bb.debug(2, "Removing manifest: %s" % entry)
         # We can race against another package populating directories as we're removing them
         # so we ignore errors here.