bitbake: fetch2: Add new srcrev fetcher API

Add new functions to return some of the get_srcrev data in new and different
ways. We need two different forms of the data, one is a string to inject into
PKGV, the other is the full revisions as a string to include in hash computations
so that the hash changes when the input revisions change.

This allows us to clean up and simplify the code in OE-Core and move the
version information from PV to PKGV.

(Bitbake rev: ae4dfa2a31c74c0c6c2b14cece822ed1f3d79723)

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

bitbake/lib/bb/fetch2/__init__.py

@@ -753,7 +753,7 @@ def get_autorev(d):
     d.setVar("__BBAUTOREV_SEEN", True)
     return "AUTOINC"
 
-def get_srcrev(d, method_name='sortable_revision'):
+def _get_srcrev(d, method_name='sortable_revision'):
     """
     Return the revision string, usually for use in the version string (PV) of the current package
     Most packages usually only have one SCM so we just pass on the call.
@@ -774,6 +774,7 @@ def get_srcrev(d, method_name='sortable_revision'):
     d.setVar("__BBINSRCREV", True)
 
     scms = []
+    revs = []
     fetcher = Fetch(d.getVar('SRC_URI').split(), d)
     urldata = fetcher.ud
     for u in urldata:
@@ -781,16 +782,19 @@ def get_srcrev(d, method_name='sortable_revision'):
             scms.append(u)
 
     if not scms:
-        raise FetchError("SRCREV was used yet no valid SCM was found in SRC_URI")
+        d.delVar("__BBINSRCREV")
+        return "", revs
+
 
     if len(scms) == 1 and len(urldata[scms[0]].names) == 1:
         autoinc, rev = getattr(urldata[scms[0]].method, method_name)(urldata[scms[0]], d, urldata[scms[0]].names[0])
+        revs.append(rev)
         if len(rev) > 10:
             rev = rev[:10]
         d.delVar("__BBINSRCREV")
         if autoinc:
-            return "AUTOINC+" + rev
-        return rev
+            return "AUTOINC+" + rev, revs
+        return rev, revs
 
     #
     # Mutiple SCMs are in SRC_URI so we resort to SRCREV_FORMAT
@@ -806,6 +810,7 @@ def get_srcrev(d, method_name='sortable_revision'):
         ud = urldata[scm]
         for name in ud.names:
             autoinc, rev = getattr(ud.method, method_name)(ud, d, name)
+            revs.append(rev)
             seenautoinc = seenautoinc or autoinc
             if len(rev) > 10:
                 rev = rev[:10]
@@ -823,7 +828,21 @@ def get_srcrev(d, method_name='sortable_revision'):
         format = "AUTOINC+" + format
 
     d.delVar("__BBINSRCREV")
-    return format
+    return format, revs
+
+def get_hashvalue(d, method_name='sortable_revision'):
+    pkgv, revs = _get_srcrev(d, method_name=method_name)
+    return " ".join(revs)
+
+def get_pkgv_string(d, method_name='sortable_revision'):
+    pkgv, revs = _get_srcrev(d, method_name=method_name)
+    return pkgv
+
+def get_srcrev(d, method_name='sortable_revision'):
+    pkgv, revs = _get_srcrev(d, method_name=method_name)
+    if not pkgv:
+        raise FetchError("SRCREV was used yet no valid SCM was found in SRC_URI")
+    return pkgv
 
 def localpath(url, d):
     fetcher = bb.fetch2.Fetch([url], d)