When spack install checks for buildcaches only add urls for current arch. (#14467)

lib/spack/spack/binary_distribution.py

@@ -663,7 +663,7 @@ def extract_tarball(spec, filename, allow_root=False, unsigned=False,
 _cached_specs = None
 
 
-def get_specs(force=False):
+def get_specs(force=False, use_arch=False):
     """
     Get spec.yaml's for build caches available on mirror
     """
@@ -690,6 +690,9 @@ def get_specs(force=False):
                 for file in files:
                     if re.search('spec.yaml', file):
                         link = url_util.join(fetch_url_build_cache, file)
+                        if use_arch and re.search(spack.architecture(), file):
+                            urls.add(link)
+                        else:
                             urls.add(link)
         else:
             tty.msg("Finding buildcaches at %s" %
@@ -698,6 +701,9 @@ def get_specs(force=False):
                 url_util.join(fetch_url_build_cache, 'index.html'))
             for link in links:
                 if re.search("spec.yaml", link):
+                    if use_arch and re.search(spack.architecture(), link):
+                        urls.add(link)
+                    else:
                         urls.add(link)
 
     _cached_specs = []

lib/spack/spack/package.py

@@ -1507,7 +1507,7 @@ def _update_explicit_entry_in_db(self, rec, explicit):
 
     def try_install_from_binary_cache(self, explicit):
         tty.msg('Searching for binary cache of %s' % self.name)
-        specs = binary_distribution.get_specs()
+        specs = binary_distribution.get_specs(use_arch=True)
         binary_spec = spack.spec.Spec.from_dict(self.spec.to_dict())
         binary_spec._mark_concrete()
         if binary_spec not in specs: