add gblame

bin/gblame

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+
+import subprocess
+import sys
+import os
+
+from typing import List, Dict, Any
+
+DataLine = Dict[Any, Any]
+
+
+def grab_blame_data() -> List[DataLine]:
+    p = subprocess.check_output(
+        ["git", "blame", "--line-porcelain"] + sys.argv[1:],
+        encoding='utf-8',
+    )
+    data = []
+    cur = {}
+    p = str(p)
+    in_segment = False
+    for line in p.splitlines():
+        l = line.rstrip()
+        if len(l) == 0:
+            continue
+        if l[0] == '\t':
+            cur["data"] = l[1:]
+            data.append(cur)
+            cur = {}
+            in_segment = False
+            continue
+        d = l.split()
+        if not in_segment:
+            cur["sha"] = d[0]
+            cur["sha8"] = d[0][:8]
+            in_segment = True
+        else:
+            cur[d[0]] = " ".join(d[1:])
+
+    assert in_segment is False
+    return data
+
+
+FIELDS = ["sha8", "author", "summary", "data"]
+
+
+def main() -> None:
+    d = grab_blame_data()
+    lens = {}
+    for f in FIELDS:
+        maxn = 0
+        for x in d:
+            if len(x[f]) > maxn:
+                maxn = len(x[f])
+        lens[f] = maxn
+    for x in d:
+        s = ""
+        for f in FIELDS:
+            s = s + x[f].ljust(lens[f]) + ' '
+        print(s)
+
+
+if __name__ == "__main__":
+    main()