bitbake: fetch/az: Add sanity check and clarify documentation

AZ_SAS token should be prefixed with a question mark. Add a sanity check for
this and fix the documentation.

[YOCTO #15882]

(Bitbake rev: 22011765202514600314732b97f1bb938e21f585)

Signed-off-by: Robbin Van Damme <robbinvandamme@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/bitbake/lib/bb/fetch2/az.py b/bitbake/lib/bb/fetch2/az.py
index 346124a8bf..1d3664f213 100644
--- a/bitbake/lib/bb/fetch2/az.py
+++ b/bitbake/lib/bb/fetch2/az.py
@@ -36,6 +36,8 @@ class Az(Wget):
 
         az_sas = d.getVar('AZ_SAS')
         if az_sas and az_sas not in ud.url:
+            if not az_sas.startswith('?'):
+                raise FetchError("When using AZ_SAS, it must start with a '?' character to mark the start of the query-parameters.")
             ud.url += az_sas
 
         return Wget.checkstatus(self, fetch, ud, d, try_again)
@@ -62,6 +64,8 @@ class Az(Wget):
         az_sas = d.getVar('AZ_SAS')
 
         if az_sas:
+            if not az_sas.startswith('?'):
+                raise FetchError("When using AZ_SAS, it must start with a '?' character to mark the start of the query-parameters.")
             azuri = '%s%s%s%s' % ('https://', ud.host, ud.path, az_sas)
         else:
             azuri = '%s%s%s' % ('https://', ud.host, ud.path)