3 files changed, 46 insertions, 5 deletions

diff --git a/meta/lib/bblayers/machines.py b/meta/lib/bblayers/machines.py
new file mode 100644
index 0000000000..5fd970af0e
--- /dev/null
+++ b/meta/lib/bblayers/machines.py
@@ -0,0 +1,37 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import logging
+import pathlib
+
+from bblayers.common import LayerPlugin
+
+logger = logging.getLogger('bitbake-layers')
+
+def plugin_init(plugins):
+    return ShowMachinesPlugin()
+
+class ShowMachinesPlugin(LayerPlugin):
+    def do_show_machines(self, args):
+        """List the machines available in the currently configured layers."""
+
+        for layer_dir in self.bblayers:
+            layer_name = self.get_layer_name(layer_dir)
+
+            if args.layer and args.layer != layer_name:
+                continue
+
+            for p in sorted(pathlib.Path(layer_dir).glob("conf/machine/*.conf")):
+                if args.bare:
+                    logger.plain("%s" % (p.stem))
+                else:
+                    logger.plain("%s (%s)" % (p.stem, layer_name))
+
+
+    def register_commands(self, sp):
+        parser_show_machines = self.add_command(sp, "show-machines", self.do_show_machines)
+        parser_show_machines.add_argument('-b', '--bare', help='output just the machine names, not the source layer', action='store_true')
+        parser_show_machines.add_argument('-l', '--layer', help='Limit to machines in the specified layer')
diff --git a/meta/lib/bblayers/makesetup.py b/meta/lib/bblayers/makesetup.py
index 99d5973760..4199b5f069 100644
--- a/meta/lib/bblayers/makesetup.py
+++ b/meta/lib/bblayers/makesetup.py
@@ -48,8 +48,9 @@ class MakeSetupPlugin(LayerPlugin):
             if l_name == 'workspace':
                 continue
             if l_ismodified:
-                logger.error("Layer {name} in {path} has uncommitted modifications or is not in a git repository.".format(name=l_name,path=l_path))
-                return
+                e = "Layer {name} in {path} has uncommitted modifications or is not in a git repository.".format(name=l_name,path=l_path)
+                logger.error(e)
+                raise Exception(e)
             repo_path = oe.buildcfg.get_metadata_git_toplevel(l_path)
 
             if self._is_submodule(repo_path):
@@ -62,9 +63,6 @@ class MakeSetupPlugin(LayerPlugin):
                         'describe':oe.buildcfg.get_metadata_git_describe(repo_path)}}
                 if repo_path == destdir_repo:
                     repos[repo_path]['contains_this_file'] = True
-                if not repos[repo_path]['git-remote']['remotes'] and not repos[repo_path]['contains_this_file']:
-                    logger.error("Layer repository in {path} does not have any remotes configured. Please add at least one with 'git remote add'.".format(path=repo_path))
-                    return
 
         top_path = os.path.commonpath([os.path.dirname(r) for r in repos.keys()])
 
@@ -74,6 +72,7 @@ class MakeSetupPlugin(LayerPlugin):
             repos_nopaths[r_nopath] = repos[r]
             r_relpath = os.path.relpath(r, top_path)
             repos_nopaths[r_nopath]['path'] = r_relpath
+            repos_nopaths[r_nopath]['originpath'] = r
         return repos_nopaths
 
     def do_make_setup(self, args):
diff --git a/meta/lib/bblayers/setupwriters/oe-setup-layers.py b/meta/lib/bblayers/setupwriters/oe-setup-layers.py
index 59ca968ff3..8faeabfabc 100644
--- a/meta/lib/bblayers/setupwriters/oe-setup-layers.py
+++ b/meta/lib/bblayers/setupwriters/oe-setup-layers.py
@@ -85,6 +85,11 @@ class OeSetupLayersWriter():
             if not os.path.exists(args.destdir):
                 os.makedirs(args.destdir)
             repos = parent.make_repo_config(args.destdir)
+            for r in repos.values():
+                if not r['git-remote']['remotes'] and not r.get('contains_this_file', False):
+                    e = "Layer repository in {path} does not have any remotes configured. Please add at least one with 'git remote add'.".format(path=r['originpath'])
+                    raise Exception(e)
+                del r['originpath']
             json = {"version":"1.0","sources":repos}
             if not repos:
                 err = "Could not determine layer sources"