We're seeing a lot of users configuring an sstate mirror but not realising that
the default hash equivalenve setting will make this ineffective. Add a warning
to highlight this to the user for the common case.

Signed-off-by: Richard Purdie <[email protected]>
---
 meta/classes/sanity.bbclass | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
index 92807dc88e9..be956fbcd6c 100644
--- a/meta/classes/sanity.bbclass
+++ b/meta/classes/sanity.bbclass
@@ -914,6 +914,11 @@ def check_sanity_everybuild(status, d):
                     mirror_base = 
urllib.parse.urlparse(mirror[:-1*len('/PATH')]).path
                     check_symlink(mirror_base, d)
 
+    # Check sstate mirrors aren't being used with a local hash server and no 
remote
+    hashserv = d.getVar("BB_HASHSERVE")
+    if d.getVar("SSTATE_MIRRORS") and hashserv and 
hashserv.startswith("unix://") and not d.getVar("BB_HASHSERVE_UPSTREAM"):
+        bb.warn("You are using a local hash equivalence server but have 
configured an sstate mirror. This will likely mean no sstate will match from 
the mirror. You may wish to disable the hash equivalence use (BB_HASHSERVE), or 
use a hash equivalence server alongside the sstate mirror.")
+
     # Check that TMPDIR hasn't changed location since the last time we were run
     tmpdir = d.getVar('TMPDIR')
     checkfile = os.path.join(tmpdir, "saved_tmpdir")
-- 
2.32.0

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