debugmergestate: make templated

Our IntelliJ team wants to be able to read the merge state in order to
help the user resolve merge conflicts. They had so far been reading
file contents from p1() and p2() and their merge base. That is not
ideal for several reasons (merge base is not necessarily the "graft
base", renames are not handled, commands like `hg update -m` is not
handled). It will get especially bad as of my D7827. This patch makes
the output s a templated. I haven't bothered to make it complete
(e.g. merge driver states are not handled), but it's probably good
enough as a start.

I've done a web search for "debugmergestate" and I can't find any
indication that any tools currently rely on its output. If it turns
out that we get bug reports for it once this is released, I won't
object to backing this patch out on the stable branch (and then
perhaps replace it by a separate command, or put it behind a new
flag).

The changes in test-backout.t are interesting, in particular this:

```
  -    other path: foo (node not stored in v1 format)
  +    other path:  (node foo)
```

I wonder if that means that we actually read v1 format
incorrectly. That seems to be an old format that was switched away
from in 2014, so it doesn't matter now anyway.

Differential Revision: https://phab.mercurial-scm.org/D8120

mercurial/debugcommands.py

@@ -28,7 +28,6 b' from .i18n import _'
 from .node import (
     bin,
     hex,
-    nullhex,
     nullid,
     nullrev,
     short,
@@ -1944,120 +1943,100 b' def debugmanifestfulltextcache(ui, repo,'
         )
 
 
-@command(b'debugmergestate', [], b'')
-def debugmergestate(ui, repo, *args):
+@command(b'debugmergestate', [] + cmdutil.templateopts, b'')
+def debugmergestate(ui, repo, *args, **opts):
     """print merge state
 
     Use --verbose to print out information about whether v1 or v2 merge state
     was chosen."""
 
-    def _hashornull(h):
-        if h == nullhex:
-            return b'null'
-        else:
-            return h
-
-    def printrecords(version):
-        ui.writenoi18n(b'* version %d records\n' % version)
-        if version == 1:
-            records = v1records
+    if ui.verbose:
+        ms = mergemod.mergestate(repo)
+
+        # sort so that reasonable information is on top
+        v1records = ms._readrecordsv1()
+        v2records = ms._readrecordsv2()
+
+        if not v1records and not v2records:
+            pass
+        elif not v2records:
+            ui.writenoi18n(b'no version 2 merge state\n')
+        elif ms._v1v2match(v1records, v2records):
+            ui.writenoi18n(b'v1 and v2 states match: using v2\n')
         else:
-            records = v2records
-
-        for rtype, record in records:
-            # pretty print some record types
-            if rtype == b'L':
-                ui.writenoi18n(b'local: %s\n' % record)
-            elif rtype == b'O':
-                ui.writenoi18n(b'other: %s\n' % record)
-            elif rtype == b'm':
-                driver, mdstate = record.split(b'\0', 1)
-                ui.writenoi18n(
-                    b'merge driver: %s (state "%s")\n' % (driver, mdstate)
-                )
-            elif rtype in b'FDC':
-                r = record.split(b'\0')
-                f, state, hash, lfile, afile, anode, ofile = r[0:7]
-                if version == 1:
-                    onode = b'not stored in v1 format'
-                    flags = r[7]
-                else:
-                    onode, flags = r[7:9]
-                ui.writenoi18n(
-                    b'file: %s (record type "%s", state "%s", hash %s)\n'
-                    % (f, rtype, state, _hashornull(hash))
-                )
-                ui.writenoi18n(
-                    b'  local path: %s (flags "%s")\n' % (lfile, flags)
-                )
-                ui.writenoi18n(
-                    b'  ancestor path: %s (node %s)\n'
-                    % (afile, _hashornull(anode))
-                )
-                ui.writenoi18n(
-                    b'  other path: %s (node %s)\n'
-                    % (ofile, _hashornull(onode))
-                )
-            elif rtype == b'f':
-                filename, rawextras = record.split(b'\0', 1)
-                extras = rawextras.split(b'\0')
-                i = 0
-                extrastrings = []
-                while i < len(extras):
-                    extrastrings.append(b'%s = %s' % (extras[i], extras[i + 1]))
-                    i += 2
-
-                ui.writenoi18n(
-                    b'file extras: %s (%s)\n'
-                    % (filename, b', '.join(extrastrings))
-                )
-            elif rtype == b'l':
-                labels = record.split(b'\0', 2)
-                labels = [l for l in labels if len(l) > 0]
-                ui.writenoi18n(b'labels:\n')
-                ui.write((b'  local: %s\n' % labels[0]))
-                ui.write((b'  other: %s\n' % labels[1]))
-                if len(labels) > 2:
-                    ui.write((b'  base:  %s\n' % labels[2]))
-            else:
-                ui.writenoi18n(
-                    b'unrecognized entry: %s\t%s\n'
-                    % (rtype, record.replace(b'\0', b'\t'))
-                )
-
-    # Avoid mergestate.read() since it may raise an exception for unsupported
-    # merge state records. We shouldn't be doing this, but this is OK since this
-    # command is pretty low-level.
-    ms = mergemod.mergestate(repo)
-
-    # sort so that reasonable information is on top
-    v1records = ms._readrecordsv1()
-    v2records = ms._readrecordsv2()
-    order = b'LOml'
-
-    def key(r):
-        idx = order.find(r[0])
-        if idx == -1:
-            return (1, r[1])
-        else:
-            return (0, idx)
-
-    v1records.sort(key=key)
-    v2records.sort(key=key)
-
-    if not v1records and not v2records:
-        ui.writenoi18n(b'no merge state found\n')
-    elif not v2records:
-        ui.notenoi18n(b'no version 2 merge state\n')
-        printrecords(1)
-    elif ms._v1v2match(v1records, v2records):
-        ui.notenoi18n(b'v1 and v2 states match: using v2\n')
-        printrecords(2)
-    else:
-        ui.notenoi18n(b'v1 and v2 states mismatch: using v1\n')
-        printrecords(1)
-        if ui.verbose:
-            printrecords(2)
+            ui.writenoi18n(b'v1 and v2 states mismatch: using v1\n')
+
+    opts = pycompat.byteskwargs(opts)
+    if not opts[b'template']:
+        opts[b'template'] = (
+            b'{if(commits, "", "no merge state found\n")}'
+            b'{commits % "{name}{if(label, " ({label})")}: {node}\n"}'
+            b'{files % "file: {path} (state \\"{state}\\")\n'
+            b'{if(local_path, "'
+            b'  local path: {local_path} (hash {local_key}, flags \\"{local_flags}\\")\n'
+            b'  ancestor path: {ancestor_path} (node {ancestor_node})\n'
+            b'  other path: {other_path} (node {other_node})\n'
+            b'")}'
+            b'{if(rename_side, "'
+            b'  rename side: {rename_side}\n'
+            b'  renamed path: {renamed_path}\n'
+            b'")}'
+            b'{extras % "  extra: {key} = {value}\n"}'
+            b'"}'
+        )
+
+    ms = mergemod.mergestate.read(repo)
+
+    fm = ui.formatter(b'debugmergestate', opts)
+    fm.startitem()
+
+    fm_commits = fm.nested(b'commits')
+    if ms.active():
+        for name, node, label_index in (
+            (b'local', ms.local, 0),
+            (b'other', ms.other, 1),
+        ):
+            fm_commits.startitem()
+            fm_commits.data(name=name)
+            fm_commits.data(node=hex(node))
+            if ms._labels and len(ms._labels) > label_index:
+                fm_commits.data(label=ms._labels[label_index])
+    fm_commits.end()
+
+    fm_files = fm.nested(b'files')
+    if ms.active():
+        for f in ms:
+            fm_files.startitem()
+            fm_files.data(path=f)
+            state = ms._state[f]
+            fm_files.data(state=state[0])
+            if state[0] in (
+                mergemod.MERGE_RECORD_UNRESOLVED,
+                mergemod.MERGE_RECORD_RESOLVED,
+            ):
+                fm_files.data(local_key=state[1])
+                fm_files.data(local_path=state[2])
+                fm_files.data(ancestor_path=state[3])
+                fm_files.data(ancestor_node=state[4])
+                fm_files.data(other_path=state[5])
+                fm_files.data(other_node=state[6])
+                fm_files.data(local_flags=state[7])
+            elif state[0] in (
+                mergemod.MERGE_RECORD_UNRESOLVED_PATH,
+                mergemod.MERGE_RECORD_RESOLVED_PATH,
+            ):
+                fm_files.data(renamed_path=state[1])
+                fm_files.data(rename_side=state[2])
+            fm_extras = fm_files.nested(b'extras')
+            for k, v in ms.extras(f).items():
+                fm_extras.startitem()
+                fm_extras.data(key=k)
+                fm_extras.data(value=v)
+            fm_extras.end()
+
+    fm_files.end()
+
+    fm.end()
 
 
 @command(b'debugnamecomplete', [], _(b'NAME...'))

relnotes/next

@@ -23,6 +23,10 b''
    Will use `zstd` compression for new repositories is available, and will
    simply fall back to `zlib` if not.
 
+ * `hg debugmergestate` output is now templated, which may be useful
+   e.g. for IDEs that want to help the user resolve merge conflicts.
+
+
 == New Experimental Features ==
 
  * `hg copy` now supports a `--at-rev` argument to mark files as
@@ -49,6 +53,10 b''
  * `hg recover` does not verify the validity of the whole repository
    anymore. You can pass `--verify` or call `hg verify` if necessary.
 
+ * `hg debugmergestate` output format changed. Let us know if that is
+   causing you problems and we'll roll it back.
+
+
 == Internal API Changes ==
 
  * The deprecated `ui.progress()` has now been deleted. Please use

tests/test-backout.t

@@ -709,23 +709,24 b' Test usage of `hg resolve` in case of co'
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ hg status
-  $ hg debugmergestate
-  * version 2 records
+  $ hg debugmergestate -v
+  v1 and v2 states match: using v2
   local: b71750c4b0fdf719734971e3ef90dbeab5919a2d
   other: a30dd8addae3ce71b8667868478542bc417439e6
-  file extras: foo (ancestorlinknode = 91360952243723bd5b1138d5f26bd8c8564cb553)
-  file: foo (record type "F", state "u", hash 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33)
-    local path: foo (flags "")
+  file: foo (state "u")
+    local path: foo (hash 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33, flags "")
     ancestor path: foo (node f89532f44c247a0e993d63e3a734dd781ab04708)
     other path: foo (node f50039b486d6fa1a90ae51778388cad161f425ee)
+    extra: ancestorlinknode = 91360952243723bd5b1138d5f26bd8c8564cb553
   $ mv .hg/merge/state2 .hg/merge/state2-moved
-  $ hg debugmergestate
-  * version 1 records
+  $ hg debugmergestate -v
+  no version 2 merge state
   local: b71750c4b0fdf719734971e3ef90dbeab5919a2d
-  file: foo (record type "F", state "u", hash 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33)
-    local path: foo (flags "")
+  other: b71750c4b0fdf719734971e3ef90dbeab5919a2d
+  file: foo (state "u")
+    local path: foo (hash 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33, flags "")
     ancestor path: foo (node f89532f44c247a0e993d63e3a734dd781ab04708)
-    other path: foo (node not stored in v1 format)
+    other path:  (node foo)
   $ mv .hg/merge/state2-moved .hg/merge/state2
   $ hg resolve -l  # still unresolved
   U foo

tests/test-completion.t

@@ -289,7 +289,7 b' Show all commands + options'
   debuglabelcomplete: 
   debuglocks: force-lock, force-wlock, set-lock, set-wlock
   debugmanifestfulltextcache: clear, add
-  debugmergestate: 
+  debugmergestate: style, template
   debugnamecomplete: 
   debugnodemap: dump-new, dump-disk, check, metadata
   debugobsolete: flags, record-parents, rev, exclusive, index, delete, date, user, template

tests/test-histedit-non-commute-abort.t

@@ -77,36 +77,22 b' edit the history'
 insert unsupported advisory merge record
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -x
   $ hg debugmergestate
-  * version 2 records
-  local: 8f7551c7e4a2f2efe0bc8c741baf7f227d65d758
-  other: e860deea161a2f77de56603b340ebbb4536308ae
-  labels:
-    local: local
-    other: histedit
-  unrecognized entry: x	advisory record
-  file extras: e (ancestorlinknode = 0000000000000000000000000000000000000000)
-  file: e (record type "F", state "u", hash 58e6b3a414a1e090dfc6029add0f3555ccba127f)
-    local path: e (flags "")
-    ancestor path: e (node null)
+  local (local): 8f7551c7e4a2f2efe0bc8c741baf7f227d65d758
+  other (histedit): e860deea161a2f77de56603b340ebbb4536308ae
+  file: e (state "u")
+    local path: e (hash 58e6b3a414a1e090dfc6029add0f3555ccba127f, flags "")
+    ancestor path: e (node 0000000000000000000000000000000000000000)
     other path: e (node 6b67ccefd5ce6de77e7ead4f5292843a0255329f)
+    extra: ancestorlinknode = 0000000000000000000000000000000000000000
   $ hg resolve -l
   U e
 
 insert unsupported mandatory merge record
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -X
   $ hg debugmergestate
-  * version 2 records
-  local: 8f7551c7e4a2f2efe0bc8c741baf7f227d65d758
-  other: e860deea161a2f77de56603b340ebbb4536308ae
-  labels:
-    local: local
-    other: histedit
-  file extras: e (ancestorlinknode = 0000000000000000000000000000000000000000)
-  file: e (record type "F", state "u", hash 58e6b3a414a1e090dfc6029add0f3555ccba127f)
-    local path: e (flags "")
-    ancestor path: e (node null)
-    other path: e (node 6b67ccefd5ce6de77e7ead4f5292843a0255329f)
-  unrecognized entry: X	mandatory record
+  abort: unsupported merge state records: X
+  (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
+  [255]
   $ hg resolve -l
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)

tests/test-merge-changedelete.t

@@ -76,27 +76,23 b' Non-interactive merge:'
   U file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -145,27 +141,23 b' Interactive merge:'
   R file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "r", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "r")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -227,27 +219,23 b' Interactive merge with bad input:'
   R file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "r", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "r")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   *** file1 does not exist
   --- file2 ---
   2
@@ -293,27 +281,23 b' Interactive merge with not enough input:'
   U file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   *** file1 does not exist
   --- file2 ---
   2
@@ -346,27 +330,23 b' Choose local versions of files'
   R file2
   R file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "r", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "r")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "r", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "r")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -395,27 +375,23 b' Choose other versions of files'
   R file2
   R file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "r", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "r")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "r", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "r")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   *** file1 does not exist
   --- file2 ---
   2
@@ -445,27 +421,23 b' Fail'
   U file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -506,27 +478,23 b' Force prompts with no input (should be s'
   U file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -569,27 +537,23 b' Force prompts'
   U file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -629,27 +593,23 b' Choose to merge all files'
   U file2
   U file3
   --- debugmergestate ---
-  * version 2 records
-  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
+  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
-  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
-    local path: file3 (flags "")
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file3 (state "u")
+    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -802,22 +762,18 b' Non-interactive linear update'
   U file1
   U file2
   --- debugmergestate ---
-  * version 2 records
-  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: destination
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -845,22 +801,18 b' Choose local versions of files'
   R file1
   R file2
   --- debugmergestate ---
-  * version 2 records
-  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: destination
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "r", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "r")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -886,22 +838,18 b' Choose other versions of files'
   R file1
   R file2
   --- debugmergestate ---
-  * version 2 records
-  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: destination
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "r", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "r")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   *** file1 does not exist
   --- file2 ---
   2
@@ -929,22 +877,18 b' Fail'
   U file1
   U file2
   --- debugmergestate ---
-  * version 2 records
-  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: destination
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -980,22 +924,18 b' Force prompts with no input'
   U file1
   U file2
   --- debugmergestate ---
-  * version 2 records
-  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: destination
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed
@@ -1032,22 +972,18 b' Choose to merge all files'
   U file1
   U file2
   --- debugmergestate ---
-  * version 2 records
-  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
-  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
-  labels:
-    local: working copy
-    other: destination
-  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file: file1 (state "u")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
-    other path: file1 (node null)
-  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
-  file: file2 (record type "C", state "u", hash null)
-    local path: file2 (flags "")
+    other path: file1 (node 0000000000000000000000000000000000000000)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
+  file: file2 (state "u")
+    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
   --- file1 ---
   1
   changed

tests/test-pathconflicts-merge.t

@@ -76,13 +76,11 b' Merge - local file conflicts with remote'
   A a/b~0ed027b96f31
   R a/b
   $ hg debugmergestate
-  * version 2 records
-  local: 0ed027b96f31a2560c8abe689ba59876409a2b8e
-  other: 9049d9534d5c5d16264aab02b4b9e20d03faabef
-  labels:
-    local: working copy
-    other: merge rev
-  unrecognized entry: P	a/b	pu	a/b~0ed027b96f31	l
+  local (working copy): 0ed027b96f31a2560c8abe689ba59876409a2b8e
+  other (merge rev): 9049d9534d5c5d16264aab02b4b9e20d03faabef
+  file: a/b (state "pu")
+    rename side: l
+    renamed path: a/b~0ed027b96f31
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg forget a/b~0ed027b96f31 && rm a/b~0ed027b96f31
@@ -115,13 +113,11 b' Merge - local symlink conflicts with rem'
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg debugmergestate
-  * version 2 records
-  local: 2ea68033e3be03a560471c1fc9e5704fbedb9b4b
-  other: 9049d9534d5c5d16264aab02b4b9e20d03faabef
-  labels:
-    local: working copy
-    other: merge rev
-  unrecognized entry: P	a/b	pr	a/b~2ea68033e3be	l
+  local (working copy): 2ea68033e3be03a560471c1fc9e5704fbedb9b4b
+  other (merge rev): 9049d9534d5c5d16264aab02b4b9e20d03faabef
+  file: a/b (state "pr")
+    rename side: l
+    renamed path: a/b~2ea68033e3be
   $ hg resolve --list
   R a/b
   $ hg commit -m "merge link and dir (renamed link)"

tests/test-rebase-abort.t

@@ -88,18 +88,13 b' Insert unsupported advisory merge record'
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -x
   $ hg debugmergestate
-  * version 2 records
-  local: 3e046f2ecedb793b97ed32108086edd1a162f8bc
-  other: 46f0b057b5c061d276b91491c22151f78698abd2
-  labels:
-    local: dest
-    other: source
-  unrecognized entry: x	advisory record
-  file extras: common (ancestorlinknode = 3163e20567cc93074fbb7a53c8b93312e59dbf2c)
-  file: common (record type "F", state "u", hash 94c8c21d08740f5da9eaa38d1f175c592692f0d1)
-    local path: common (flags "")
+  local (dest): 3e046f2ecedb793b97ed32108086edd1a162f8bc
+  other (source): 46f0b057b5c061d276b91491c22151f78698abd2
+  file: common (state "u")
+    local path: common (hash 94c8c21d08740f5da9eaa38d1f175c592692f0d1, flags "")
     ancestor path: common (node de0a666fdd9c1a0b0698b90d85064d8bd34f74b6)
     other path: common (node 2f6411de53677f6f1048fef5bf888d67a342e0a5)
+    extra: ancestorlinknode = 3163e20567cc93074fbb7a53c8b93312e59dbf2c
   $ hg resolve -l
   U common
 
@@ -107,18 +102,9 b' Insert unsupported mandatory merge recor'
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -X
   $ hg debugmergestate
-  * version 2 records
-  local: 3e046f2ecedb793b97ed32108086edd1a162f8bc
-  other: 46f0b057b5c061d276b91491c22151f78698abd2
-  labels:
-    local: dest
-    other: source
-  file extras: common (ancestorlinknode = 3163e20567cc93074fbb7a53c8b93312e59dbf2c)
-  file: common (record type "F", state "u", hash 94c8c21d08740f5da9eaa38d1f175c592692f0d1)
-    local path: common (flags "")
-    ancestor path: common (node de0a666fdd9c1a0b0698b90d85064d8bd34f74b6)
-    other path: common (node 2f6411de53677f6f1048fef5bf888d67a342e0a5)
-  unrecognized entry: X	mandatory record
+  abort: unsupported merge state records: X
+  (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
+  [255]
   $ hg resolve -l
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)

tests/test-resolve.t

@@ -306,48 +306,40 b' insert unsupported advisory merge record'
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -x
   $ hg debugmergestate
-  * version 2 records
-  local: 57653b9f834a4493f7240b0681efcb9ae7cab745
-  other: dc77451844e37f03f5c559e3b8529b2b48d381d1
-  labels:
-    local: working copy
-    other: merge rev
-  unrecognized entry: x	advisory record
-  file extras: file1 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
-  file: file1 (record type "F", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
+  local (working copy): 57653b9f834a4493f7240b0681efcb9ae7cab745
+  other (merge rev): dc77451844e37f03f5c559e3b8529b2b48d381d1
+  file: file1 (state "r")
+    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
     ancestor path: file1 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
     other path: file1 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
-  file extras: file2 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
-  file: file2 (record type "F", state "u", hash cb99b709a1978bd205ab9dfd4c5aaa1fc91c7523)
-    local path: file2 (flags "")
+    extra: ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac
+  file: file2 (state "u")
+    local path: file2 (hash cb99b709a1978bd205ab9dfd4c5aaa1fc91c7523, flags "")
     ancestor path: file2 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
     other path: file2 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
+    extra: ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac
   $ hg resolve -l
   R file1
   U file2
 
+test json output
+
+  $ hg debugmergestate -T json
+  [
+   {
+    "commits": [{"label": "working copy", "name": "local", "node": "57653b9f834a4493f7240b0681efcb9ae7cab745"}, {"label": "merge rev", "name": "other", "node": "dc77451844e37f03f5c559e3b8529b2b48d381d1"}],
+    "files": [{"ancestor_node": "2ed2a3912a0b24502043eae84ee4b279c18b90dd", "ancestor_path": "file1", "extras": [{"key": "ancestorlinknode", "value": "99726c03216e233810a2564cbc0adfe395007eac"}], "local_flags": "", "local_key": "60b27f004e454aca81b0480209cce5081ec52390", "local_path": "file1", "other_node": "6f4310b00b9a147241b071a60c28a650827fb03d", "other_path": "file1", "path": "file1", "state": "r"}, {"ancestor_node": "2ed2a3912a0b24502043eae84ee4b279c18b90dd", "ancestor_path": "file2", "extras": [{"key": "ancestorlinknode", "value": "99726c03216e233810a2564cbc0adfe395007eac"}], "local_flags": "", "local_key": "cb99b709a1978bd205ab9dfd4c5aaa1fc91c7523", "local_path": "file2", "other_node": "6f4310b00b9a147241b071a60c28a650827fb03d", "other_path": "file2", "path": "file2", "state": "u"}]
+   }
+  ]
+
+
 insert unsupported mandatory merge record
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -X
   $ hg debugmergestate
-  * version 2 records
-  local: 57653b9f834a4493f7240b0681efcb9ae7cab745
-  other: dc77451844e37f03f5c559e3b8529b2b48d381d1
-  labels:
-    local: working copy
-    other: merge rev
-  file extras: file1 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
-  file: file1 (record type "F", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
-    local path: file1 (flags "")
-    ancestor path: file1 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
-    other path: file1 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
-  file extras: file2 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
-  file: file2 (record type "F", state "u", hash cb99b709a1978bd205ab9dfd4c5aaa1fc91c7523)
-    local path: file2 (flags "")
-    ancestor path: file2 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
-    other path: file2 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
-  unrecognized entry: X	mandatory record
+  abort: unsupported merge state records: X
+  (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
+  [255]
   $ hg resolve -l
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)