Add new script to extract patches that also works with %autopatch

extract_patches.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+import sys
+from collections import OrderedDict
+
+def print_usage_and_exit():
+    print("Usage: {0} /path/to/some.spec".format(sys.argv[0]))
+    print("       Extracts the patches in the applied order from a spec-file")
+    exit(1)
+
+
+def main():
+    if len(sys.argv) != 2:
+        print_usage_and_exit()
+
+    spec_file = sys.argv[1];
+
+    patch_names = OrderedDict()
+    applied_patches = []
+    in_prep = False
+    for line in open(spec_file):
+        if not in_prep and line.startswith("Patch"):
+            first, second = line.split();
+            patch_num = int(first[5:-1])
+            patch_name = second.strip()
+            patch_names[patch_num] = patch_name
+
+        if line.startswith("%prep"):
+            in_prep = True
+
+        # Newer spec-files have autopatch, so we can print all in order and stop
+        if in_prep and line.startswith("%autopatch"):
+            for patch in patch_names.values():
+                print(patch);
+            return;
+
+        if in_prep and line.startswith("%patch"):
+            num = int(line.split()[0][6:])
+            applied_patches.append(patch_names[num])
+
+        # Once we enter %build, all patches have been read and can be printed
+        if in_prep and line.startswith("%build"):
+            for patch in applied_patches:
+                print(patch);
+            return;
+
+if __name__ == "__main__":
+    main()