[OE-core] [PATCH] siteinfo: Add mechanism to extend siteinfo information from BSP layer

[Richard Purdie]

In order to add a new architecture or sub-architecture to OE, you currently
need to tweak the table in siteinfo.bbclass. This adds a mechanism so this
can be done from a BSP layer. It needs a function definition which needs
a class file but can then be done with something like:

def rp_testfunc2(archinfo, osinfo, targetinfo, d):
    archinfo['testarch'] = "little-endian bit-32"
    osinfo['testos'] = "common-linux"
    targetinfo['mymach-linux'] = "mymach-linux-common"

    return archinfo, osinfo, targetinfo

SITEINFO_EXTRA_DATAFUNCS = "rp_testfunc2"

[YOCTO #8554]

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

diff --git a/meta/classes/siteinfo.bbclass b/meta/classes/siteinfo.bbclass
index 50141a3..3c9ab2a 100644
--- a/meta/classes/siteinfo.bbclass
+++ b/meta/classes/siteinfo.bbclass
@@ -107,6 +107,14 @@ def siteinfo_data(d):
         "x86_64-mingw32": "bit-64",
     }
 
+    # Add in any extra user supplied data which may come from a BSP layer, removing the
+    # need to always change this class directly
+    extra_siteinfo = (d.getVar("SITEINFO_EXTRA_DATAFUNCS", True) or "").split()
+    for m in extra_siteinfo:
+        call = m + "(archinfo, osinfo, targetinfo, d)"
+        locs = { "archinfo" : archinfo, "osinfo" : osinfo, "targetinfo" : targetinfo, "d" : d}
+        archinfo, osinfo, targetinfo = bb.utils.better_eval(call, locs)
+
     hostarch = d.getVar("HOST_ARCH", True)
     hostos = d.getVar("HOST_OS", True)
     target = "%s-%s" % (hostarch, hostos)