1 files changed, 129 insertions, 0 deletions
diff --git a/conf/collections.inc b/conf/collections.inc
new file mode 100644
index 0000000000..245114aed7
--- /dev/null
+++ b/conf/collections.inc
@@ -0,0 +1,129 @@
+# Take a list of directories in COLLECTIONS, in priority order (highest to
+# lowest), and use those to populate BBFILES, BBFILE_COLLECTIONS,
+# BBFILE_PATTERN_*, and BBFILE_PRIORITY_*.  By default, COLLECTIONS is
+# prepopulated with the locations the user specified in their BBPATH.
+#
+# Specifying an archive in COLLECTIONS is also supported.  Any archives of a
+# supported format will be unpacked into COLLECTIONS_UNPACKDIR and used from
+# there.
+
+COLLECTIONS = "${@' '.join(d.getVar('BBPATH', 1).split(':'))}"
+COLLECTIONS_UNPACKDIR = "${TMPDIR}/collections"
+
+def collection_unpack(collection, name, d):
+    """ Unpack a collection archive and return the path to it. """
+    import bb
+    import os
+    from md5 import md5
+
+    handlers = {
+        ("tar"): "tar x --no-same-owner -f %s",
+        ("tar.gz", "tgz", "tar.Z"): "tar xz --no-same-owner -f %s",
+        ("tar.bz2", "tbz", "tbz2"): "tar xj --no-same-owner -f %s",
+        ("zip", "jar"): "unzip -q -o %s",
+    }
+
+    outpath = os.path.join(d.getVar("COLLECTIONS_UNPACKDIR", 1), name)
+
+    try:
+        collectiondata = open(collection, "r").read()
+    except IOError:
+        bb.fatal("Unable to open %s to calculate md5 sum" % collection)
+
+    md5obj = md5()
+    md5obj.update(collectiondata)
+    md5sum = md5obj.hexdigest()
+
+    md5file = os.path.join(outpath, "md5")
+    if os.path.exists(md5file):
+        try:
+            oldmd5sum = open(md5file).read()
+        except IOError:
+            pass
+        else:
+            if oldmd5sum == md5sum:
+                bb.debug(1, "Using existing %s for collection %s" % (outpath, name))
+                return outpath
+
+        bb.note("Removing old unpacked collection at %s" % outpath)
+        os.system("rm -rf %s" % outpath)
+
+    try:
+        cmd = (cmd for (exts, cmd) in handlers.iteritems()
+                   for e in exts
+                   if collection.endswith(e)).next()
+        cmd = "cd %s && PATH=\"%s\" %s" % (outpath, d.getVar("PATH", 1), cmd)
+    except StopIteration:
+        bb.fatal("Unable to find unpack handler for %s" % collection)
+
+    if not os.path.isdir(outpath):
+        os.makedirs(outpath)
+
+    bb.note("Unpacking %s to %s/" % (collection, outpath))
+    ret = os.system(cmd % collection)
+    if ret != 0:
+        bb.fatal("Unable to unpack %s" % collection)
+
+    md5out = open(md5file, "w")
+    md5out.write(md5sum)
+    md5out.close()
+    return outpath
+
+def collections_setup(d):
+    """ Populate collection and bbfiles metadata from the COLLECTIONS var. """
+    import bb
+    import os
+    from itertools import izip, chain
+    from glob import glob
+
+    def setifunset(k, v):
+        if d.getVar(k, 0) is None:
+            d.setVar(k, v)
+
+    collections = d.getVar("COLLECTIONS", 1)
+    if not collections:
+        return
+    globbed = (glob(path) for path in collections.split())
+    collections = list(chain(*globbed))
+
+    collectionmap = {}
+    namemap = {}
+    for collection in collections:
+        basename = os.path.basename(collection).split(os.path.extsep)[0]
+        if namemap.get(basename):
+            basename = "%s-%s" % (basename, hash(collection))
+        namemap[basename] = collection
+        collectionmap[collection] = basename
+
+    for (collection, priority) in izip(collections, xrange(len(collections), 0, -1)):
+        if not os.path.exists(collection):
+            bb.fatal("Collection %s does not exist" % collection)
+
+        name = collectionmap[collection]
+        if not name:
+            bb.fatal("Unable to determine collection name for %s" % collection)
+
+        if not os.path.isdir(collection):
+            del collectionmap[collection]
+            unpacked = collection_unpack(collection, name, d)
+            if unpacked:
+                collection = unpacked
+                collectionmap[collection] = name
+            else:
+                bb.fatal("Unable to unpack collection %s" % collection)
+
+        setifunset("BBFILE_PATTERN_%s" % name, "^%s/" % collection)
+        setifunset("BBFILE_PRIORITY_%s" % name, str(priority))
+
+    setifunset("BBFILE_COLLECTIONS", " ".join(collectionmap.values()))
+    setifunset("BBFILES", " ".join(collectionmap.keys()))
+
+addhandler collections_eh
+python collections_eh () {
+    from bb.event import getName
+
+    if getName(e) == "ConfigParsed":
+        collections_setup(e.data)
+
+    return NotHandled
+}