Create Python script to automatically resolve merge conflict in keyfreq

keyfreq-conflict-resolve.py

@@ -0,0 +1,75 @@
+# git show :stage:filename
+# common ancestor: 1
+# HEAD: 2
+# MERGE_HEAD: 3
+
+import re
+from subprocess import Popen, PIPE
+import sys
+
+BASE = 1
+HEAD = 2
+MERGE_HEAD = 3
+FINAL = 0
+
+outputs = {}
+
+for stage in (BASE, HEAD, MERGE_HEAD):
+    p = Popen(['git', 'show', f':{stage}:keyfreq'], stdout=PIPE, stderr=PIPE)
+    output, err = p.communicate()
+
+    if p.returncode:
+        print(output)
+        sys.exit(1)
+
+    outputs[stage] = {}
+
+    if b'"' in output:
+        raise ValueError(f'There is a " in the output of stage {stage}')
+
+    output = output.decode('utf-8')[1:-1].split('\n')
+
+    for line in output:
+        line = line.strip()
+
+        if not line:
+            continue
+
+        m = re.match(r'^\(\(([^) ]+) .\ ([^) ]+)\) \. ([0-9]+)\)$', line)
+
+        if not m:
+            raise ValueError(f'Invalid cons cell: {line}')
+
+        mode, command, count = m.groups()
+        count = int(count)
+
+        outputs[stage].setdefault(mode, {})
+        outputs[stage][mode][command] = count
+
+
+outputs[FINAL] = {}
+
+for stage in (BASE, HEAD, MERGE_HEAD):
+    for mode in outputs[stage]:
+        outputs[FINAL][mode] = {}
+
+        for command, count in outputs[stage][mode].items():
+            base_mode = outputs[BASE].get(mode, {})
+            base_count = base_mode.get(command, 0)
+            this_count = outputs[stage][mode][command]
+
+            outputs[FINAL][mode].setdefault(command, base_count)
+            
+            if stage != BASE:
+                outputs[FINAL][mode][command] += this_count - base_count
+
+output = '('
+for mode in outputs[FINAL]:
+    for command, count in outputs[FINAL][mode].items():
+        output += f'(({mode} . {command}) . {count})\n'
+
+output = output[:-1] + ')'
+
+with open('keyfreq', 'w') as f:
+    f.write(output)
+