Change to dashes to keep inline with maintainers folder

Change-Id: Id49a330106377997ebbeb2d56ed4c623c9f1e978

device-deps-regenerator/device2kernel.py

@@ -0,0 +1,46 @@
+import json
+
+# Define device repos that have repos that depend on them,
+# otherwise the script will remove these on the assumption
+# they are common repos
+COMMON_DEVICE = [
+    'android_device_asus_flo',
+    'android_device_asus_grouper',
+    'android_device_google_marlin',
+    'android_device_samsung_espressowifi',
+    'android_device_samsung_n1awifi',
+    'android_device_samsung_t0lte',
+]
+
+with open('out.json') as f:
+    mapping = json.load(f)
+
+kernels = {}
+
+reverse_deps = {}
+
+for device in mapping:
+    deps = mapping[device]
+    if device not in reverse_deps:
+        reverse_deps[device] = []
+    for repo in deps:
+        if repo['repo'] not in reverse_deps:
+            reverse_deps[repo['repo']] = []
+        reverse_deps[repo['repo']].append(device)
+
+def simplify_reverse_deps(repo):
+    if len(reverse_deps[repo]) == 0 and '-common' not in repo:
+        return {repo,}
+    res = set()
+    for i in reverse_deps[repo]:
+        res.update(simplify_reverse_deps(i))
+    if repo in COMMON_DEVICE:
+        res.add(repo)
+    return res
+
+for repo in reverse_deps:
+    if 'kernel' in repo:
+        kernels[repo] = sorted(list(simplify_reverse_deps(repo)))
+
+with open('kernels.json', 'w') as f:
+    json.dump(kernels, f, indent=4, sort_keys=True)