Implement BBVERSIONS

This implements a feature similar to BBCLASSEXTEND, but for generating
multiple versions of a given recipe.  For example: BBVERSIONS = "1.0 2.0 git".

In addition to the above, one can utilize [a-b] style patterns, and can have a
:<basever> postfix, which allows you to essentially name the range of
versions.  Both the current version and the basever end up in OVERRIDES, and
the basever gets placed into the BPV variable.  The default BPV, if none is
specified, is the original PV of the recipe, before bbversions processing.

In this way, you can do things like:
BBVERSIONS = "1.0.[0-6]:1.0.0+
              1.0.[7-9]:1.0.7+"

SRC_URI_append_1.0.7+ = "file://some_extra_patch.patch;patch=1"

Or you can create a recipe per range, and name the recipe file as such: nano_1.0.7+.bb.

(Bitbake rev: 4ee9a56e16f1eb3c1649eaa3127b09ab0e93d1ec)

Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/lib/bb/parse/ast.py

@@ -22,9 +22,11 @@
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import bb, re, string
+from itertools import chain
 
 __word__ = re.compile(r"\S+")
 __parsed_methods__ = bb.methodpool.get_parsed_dict()
+_bbversions_re = re.compile(r"\[(?P<from>[0-9]+)-(?P<to>[0-9]+)\]")
 
 class StatementGroup(list):
     def eval(self, data):
@@ -335,3 +337,115 @@ def finalise(fn, d):
 
     bb.event.fire(bb.event.RecipeParsed(fn), d)
 
+def _create_variants(datastores, names, function):
+    def create_variant(name, orig_d, arg = None):
+        new_d = bb.data.createCopy(orig_d)
+        function(arg or name, new_d)
+        datastores[name] = new_d
+
+    for variant, variant_d in datastores.items():
+        for name in names:
+            if not variant:
+                # Based on main recipe
+                create_variant(name, variant_d)
+            else:
+                create_variant("%s-%s" % (variant, name), variant_d, name)
+
+def _expand_versions(versions):
+    def expand_one(version, start, end):
+        for i in xrange(start, end + 1):
+            ver = _bbversions_re.sub(str(i), version, 1)
+            yield ver
+
+    versions = iter(versions)
+    while True:
+        try:
+            version = versions.next()
+        except StopIteration:
+            break
+
+        range_ver = _bbversions_re.search(version)
+        if not range_ver:
+            yield version
+        else:
+            newversions = expand_one(version, int(range_ver.group("from")),
+                                     int(range_ver.group("to")))
+            versions = chain(newversions, versions)
+
+def multi_finalize(fn, d):
+    safe_d = d
+
+    d = bb.data.createCopy(safe_d)
+    try:
+        finalise(fn, d)
+    except bb.parse.SkipPackage:
+        bb.data.setVar("__SKIPPED", True, d)
+    datastores = {"": safe_d}
+
+    versions = (d.getVar("BBVERSIONS", True) or "").split()
+    if versions:
+        pv = orig_pv = d.getVar("PV", True)
+        baseversions = {}
+
+        def verfunc(ver, d, pv_d = None):
+            if pv_d is None:
+                pv_d = d
+
+            overrides = d.getVar("OVERRIDES", True).split(":")
+            pv_d.setVar("PV", ver)
+            overrides.append(ver)
+            bpv = baseversions.get(ver) or orig_pv
+            pv_d.setVar("BPV", bpv)
+            overrides.append(bpv)
+            d.setVar("OVERRIDES", ":".join(overrides))
+
+        versions = list(_expand_versions(versions))
+        for pos, version in enumerate(list(versions)):
+            try:
+                pv, bpv = version.split(":", 2)
+            except ValueError:
+                pass
+            else:
+                versions[pos] = pv
+                baseversions[pv] = bpv
+
+        if pv in versions and not baseversions.get(pv):
+            versions.remove(pv)
+        else:
+            pv = versions.pop()
+
+            # This is necessary because our existing main datastore
+            # has already been finalized with the old PV, we need one
+            # that's been finalized with the new PV.
+            d = bb.data.createCopy(safe_d)
+            verfunc(pv, d, safe_d)
+            try:
+                finalise(fn, d)
+            except bb.parse.SkipPackage:
+                bb.data.setVar("__SKIPPED", True, d)
+
+        _create_variants(datastores, versions, verfunc)
+
+    extended = d.getVar("BBCLASSEXTEND", True) or ""
+    if extended:
+        pn = d.getVar("PN", True)
+        def extendfunc(name, d):
+            d.setVar("PN", "%s-%s" % (pn, name))
+            bb.parse.BBHandler.inherit([name], d)
+
+        safe_d.setVar("BBCLASSEXTEND", extended)
+        _create_variants(datastores, extended.split(), extendfunc)
+
+    for variant, variant_d in datastores.items():
+        if variant:
+            try:
+                finalise(fn, variant_d)
+            except bb.parse.SkipPackage:
+                bb.data.setVar("__SKIPPED", True, variant_d)
+
+    if len(datastores) > 1:
+        variants = filter(None, datastores.keys())
+        safe_d.setVar("__VARIANTS", " ".join(variants))
+
+    datastores[""] = d
+    return datastores