changeset 23473:922b10c870c5

merge: branch code into {n1 and n2, n1, n2} top-level cases There are three high-level cases that are of interest in manifestmerge(): 1) The file exists on both sides, 2) The file exists only on the local side, and 3) The file exists only on the remote side. Let's make this clearer in the code. The 'if f in copied' case will be broken up into the two applicable branches in the next patch.
author Martin von Zweigbergk <martinvonz@google.com>
date Sun, 23 Nov 2014 14:09:10 -0800
parents 48cdf90f17c5
children 9f4ac44a7273
files mercurial/merge.py
diffstat 1 files changed, 67 insertions(+), 63 deletions(-) [+]
line wrap: on
line diff
--- a/mercurial/merge.py	Tue Dec 02 16:39:59 2014 -0800
+++ b/mercurial/merge.py	Sun Nov 23 14:09:10 2014 -0800
@@ -414,7 +414,7 @@
     for f, ((n1, fl1), (n2, fl2)) in diff.iteritems():
         if partial and not partial(f):
             continue
-        if n1 and n2:
+        if n1 and n2: # file exists on both local and remote side
             if f not in ma:
                 fa = copy.get(f, None)
                 if fa is not None:
@@ -443,72 +443,76 @@
                                    "versions differ"))
         elif f in copied: # files we'll deal with on m2 side
             pass
-        elif n1 and f in movewithdir: # directory rename, move local
-            f2 = movewithdir[f]
-            actions['dm'].append((f2, (f, fl1),
-                            "remote directory rename - move from " + f))
-        elif n1 and f in copy:
-            f2 = copy[f]
-            actions['m'].append((f, (f, f2, f2, False, pa.node()),
-                            "local copied/moved from " + f2))
-        elif n1 and f in ma: # clean, a different, no remote
-            if n1 != ma[f]:
-                if acceptremote:
-                    actions['r'].append((f, None, "remote delete"))
+        elif n1: # file exists only on local side
+            if f in movewithdir: # directory rename, move local
+                f2 = movewithdir[f]
+                actions['dm'].append((f2, (f, fl1),
+                                "remote directory rename - move from " + f))
+            elif f in copy:
+                f2 = copy[f]
+                actions['m'].append((f, (f, f2, f2, False, pa.node()),
+                                "local copied/moved from " + f2))
+            elif f in ma: # clean, a different, no remote
+                if n1 != ma[f]:
+                    if acceptremote:
+                        actions['r'].append((f, None, "remote delete"))
+                    else:
+                        actions['cd'].append((f, None,
+                                              "prompt changed/deleted"))
+                elif n1[20:] == 'a':
+                    # This extra 'a' is added by working copy manifest to mark
+                    # the file as locally added. We should forget it instead of
+                    # deleting it.
+                    actions['f'].append((f, None, "remote deleted"))
                 else:
-                    actions['cd'].append((f, None, "prompt changed/deleted"))
-            elif n1[20:] == 'a':
-                # This extra 'a' is added by working copy manifest to mark the
-                # file as locally added. We should forget it instead of
-                # deleting it.
-                actions['f'].append((f, None, "remote deleted"))
-            else:
-                actions['r'].append((f, None, "other deleted"))
-        elif n2 and f in movewithdir:
-            f2 = movewithdir[f]
-            actions['dg'].append((f2, (f, fl2),
-                            "local directory rename - get from " + f))
-        elif n2 and f in copy:
-            f2 = copy[f]
-            if f2 in m2:
-                actions['m'].append((f, (f2, f, f2, False, pa.node()),
-                                "remote copied from " + f2))
-            else:
-                actions['m'].append((f, (f2, f, f2, True, pa.node()),
-                                "remote moved from " + f2))
-        elif n2 and f not in ma:
-            # local unknown, remote created: the logic is described by the
-            # following table:
-            #
-            # force  branchmerge  different  |  action
-            #   n         *           n      |    get
-            #   n         *           y      |   abort
-            #   y         n           *      |    get
-            #   y         y           n      |    get
-            #   y         y           y      |   merge
-            #
-            # Checking whether the files are different is expensive, so we
-            # don't do that when we can avoid it.
-            if force and not branchmerge:
-                actions['g'].append((f, (fl2,), "remote created"))
-            else:
+                    actions['r'].append((f, None, "other deleted"))
+        elif n2: # file exists only on remote side
+            if f in movewithdir:
+                f2 = movewithdir[f]
+                actions['dg'].append((f2, (f, fl2),
+                                "local directory rename - get from " + f))
+            elif f in copy:
+                f2 = copy[f]
+                if f2 in m2:
+                    actions['m'].append((f, (f2, f, f2, False, pa.node()),
+                                    "remote copied from " + f2))
+                else:
+                    actions['m'].append((f, (f2, f, f2, True, pa.node()),
+                                    "remote moved from " + f2))
+            elif f not in ma:
+                # local unknown, remote created: the logic is described by the
+                # following table:
+                #
+                # force  branchmerge  different  |  action
+                #   n         *           n      |    get
+                #   n         *           y      |   abort
+                #   y         n           *      |    get
+                #   y         y           n      |    get
+                #   y         y           y      |   merge
+                #
+                # Checking whether the files are different is expensive, so we
+                # don't do that when we can avoid it.
+                if force and not branchmerge:
+                    actions['g'].append((f, (fl2,), "remote created"))
+                else:
+                    different = _checkunknownfile(repo, wctx, p2, f)
+                    if force and branchmerge and different:
+                        actions['m'].append((f, (f, f, None, False, pa.node()),
+                                        "remote differs from untracked local"))
+                    elif not force and different:
+                        aborts.append((f, 'ud'))
+                    else:
+                        actions['g'].append((f, (fl2,), "remote created"))
+            elif n2 != ma[f]:
                 different = _checkunknownfile(repo, wctx, p2, f)
-                if force and branchmerge and different:
-                    actions['m'].append((f, (f, f, None, False, pa.node()),
-                                    "remote differs from untracked local"))
-                elif not force and different:
+                if not force and different:
                     aborts.append((f, 'ud'))
                 else:
-                    actions['g'].append((f, (fl2,), "remote created"))
-        elif n2 and n2 != ma[f]:
-            different = _checkunknownfile(repo, wctx, p2, f)
-            if not force and different:
-                aborts.append((f, 'ud'))
-            else:
-                if acceptremote:
-                    actions['g'].append((f, (fl2,), "remote recreating"))
-                else:
-                    actions['dc'].append((f, (fl2,), "prompt deleted/changed"))
+                    if acceptremote:
+                        actions['g'].append((f, (fl2,), "remote recreating"))
+                    else:
+                        actions['dc'].append((f, (fl2,),
+                                              "prompt deleted/changed"))
 
     for f, m in sorted(aborts):
         if m == 'ud':