Bug 1411943 - Fix Blame for Mercurial 4.3+

Mercurial 4.3 changed the format of the "annotate" command. See
https://www.mercurial-scm.org/wiki/Release4.3

Author: stasm

tools/migrate/blame.py

@@ -1,5 +1,4 @@
 import argparse
-import os
 import json
 import hglib
 from hglib.util import b, cmdbuilder
@@ -13,39 +12,43 @@ def __init__(self, repopath):
         self.blame = {}
 
     def main(self):
-        for manifestline in self.client.manifest():
-            leaf = manifestline[-1]
-            self.handleFile(leaf)
+        args = cmdbuilder(
+            b('annotate'), self.client.root(), d=True, u=True, T='json')
+        blame_json = ''.join(self.client.rawcommand(args))
+        file_blames = json.loads(blame_json)
+
+        for file_blame in file_blames:
+            self.handleFile(file_blame)
+
         return {'authors': self.users,
                 'blame': self.blame}
 
-    def handleFile(self, leaf):
+    def handleFile(self, file_blame):
+        abspath = file_blame['abspath']
         try:
-            parser = getParser(leaf)
+            parser = getParser(abspath)
         except UserWarning:
             return
-        args = cmdbuilder(b('annotate'), d=True, u=True, T='json',
-                          *['path:' + leaf])
-        blame_json = ''.join(self.client.rawcommand(args))
-        blames = json.loads(blame_json)
-        fname = os.path.join(self.client.root(), leaf)
+
+        fname = file_blame['path']
         parser.readFile(fname)
         entities, emap = parser.parse()
-        self.blame[leaf] = {}
+        self.blame[abspath] = {}
         for e in entities:
             if isinstance(e, Junk):
                 continue
-            blines = blames[
+            entity_lines = file_blame['lines'][
                 (e.value_position()[0] - 1):e.value_position(-1)[0]
             ]
-            blines.sort(key=lambda blame: -blame['date'][0])  # ignore timezone
-            blame = blines[0]
-            user = blame['user']
-            timestamp = blame['date'][0]  # ignore timezone
+            # ignore timezone
+            entity_lines.sort(key=lambda blame: -blame['date'][0])
+            line_blame = entity_lines[0]
+            user = line_blame['user']
+            timestamp = line_blame['date'][0]  # ignore timezone
             if user not in self.users:
                 self.users.append(user)
             userid = self.users.index(user)
-            self.blame[leaf][e.key] = [userid, timestamp]
+            self.blame[abspath][e.key] = [userid, timestamp]
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser()