merge: remove linear variable

mercurial/merge.py

@@ -1,364 +1,363
 # merge.py - directory-level update/merge handling for Mercurial
 #
 # Copyright 2006 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from node import *
 from i18n import gettext as _
 from demandload import *
 demandload(globals(), "errno util os tempfile")
 
 def fmerge(f, local, other, ancestor):
     """merge executable flags"""
     a, b, c = ancestor.execf(f), local.execf(f), other.execf(f)
     return ((a^b) | (a^c)) ^ a
 
 def merge3(repo, fn, my, other, p1, p2):
     """perform a 3-way merge in the working directory"""
 
     def temp(prefix, node):
         pre = "%s~%s." % (os.path.basename(fn), prefix)
         (fd, name) = tempfile.mkstemp(prefix=pre)
         f = os.fdopen(fd, "wb")
         repo.wwrite(fn, fl.read(node), f)
         f.close()
         return name
 
     fl = repo.file(fn)
     base = fl.ancestor(my, other)
     a = repo.wjoin(fn)
     b = temp("base", base)
     c = temp("other", other)
 
     repo.ui.note(_("resolving %s\n") % fn)
     repo.ui.debug(_("file %s: my %s other %s ancestor %s\n") %
                           (fn, short(my), short(other), short(base)))
 
     cmd = (os.environ.get("HGMERGE") or repo.ui.config("ui", "merge")
            or "hgmerge")
     r = util.system('%s "%s" "%s" "%s"' % (cmd, a, b, c), cwd=repo.root,
                     environ={'HG_FILE': fn,
                              'HG_MY_NODE': p1,
                              'HG_OTHER_NODE': p2,
                              'HG_FILE_MY_NODE': hex(my),
                              'HG_FILE_OTHER_NODE': hex(other),
                              'HG_FILE_BASE_NODE': hex(base)})
     if r:
         repo.ui.warn(_("merging %s failed!\n") % fn)
 
     os.unlink(b)
     os.unlink(c)
     return r
 
 def checkunknown(repo, m2, status):
     """
     check for collisions between unknown files and files in m2
     """
     modified, added, removed, deleted, unknown = status[:5]
     for f in unknown:
         if f in m2:
             if repo.file(f).cmp(m2[f], repo.wread(f)):
                 raise util.Abort(_("'%s' already exists in the working"
                                    " dir and differs from remote") % f)
 
 def workingmanifest(repo, man, status):
     """
     Update manifest to correspond to the working directory
     """
 
     modified, added, removed, deleted, unknown = status[:5]
     for i,l in (("a", added), ("m", modified), ("u", unknown)):
         for f in l:
             man[f] = man.get(f, nullid) + i
             man.set(f, util.is_exec(repo.wjoin(f), man.execf(f)))
 
     for f in deleted + removed:
         del man[f]
 
     return man
 
 def forgetremoved(m2, status):
     """
     Forget removed files
 
     If we're jumping between revisions (as opposed to merging), and if
     neither the working directory nor the target rev has the file,
     then we need to remove it from the dirstate, to prevent the
     dirstate from listing the file when it is no longer in the
     manifest.
     """
 
     modified, added, removed, deleted, unknown = status[:5]
     action = []
 
     for f in deleted + removed:
         if f not in m2:
             action.append((f, "f"))
 
     return action
 
 def manifestmerge(ui, m1, m2, ma, overwrite, backwards, partial):
     """
     Merge manifest m1 with m2 using ancestor ma and generate merge action list
     """
 
     action = []
 
     # Filter manifests
     if partial:
         for f in m1.keys():
             if not partial(f): del m1[f]
         for f in m2.keys():
             if not partial(f): del m2[f]
 
     # Compare manifests
     for f, n in m1.iteritems():
         if f in m2:
             queued = 0
 
             # are files different?
             if n != m2[f]:
                 a = ma.get(f, nullid)
                 # are both different from the ancestor?
                 if not overwrite and n != a and m2[f] != a:
                     ui.debug(_(" %s versions differ, resolve\n") % f)
                     action.append((f, "m", fmerge(f, m1, m2, ma), n[:20], m2[f]))
                     queued = 1
                 # are we clobbering?
                 # is remote's version newer?
                 # or are we going back in time and clean?
                 elif overwrite or m2[f] != a or (backwards and not n[20:]):
                     ui.debug(_(" remote %s is newer, get\n") % f)
                     action.append((f, "g", m2.execf(f), m2[f]))
                     queued = 1
             elif n[20:] in ("u","a"):
                 # this unknown file is the same as the checkout
                 # we need to reset the dirstate if the file was added
                 action.append((f, "g", m2.execf(f), m2[f]))
 
             # do we still need to look at mode bits?
             if not queued and m1.execf(f) != m2.execf(f):
                 if overwrite:
                     ui.debug(_(" updating permissions for %s\n") % f)
                     action.append((f, "e", m2.execf(f)))
                 else:
                     mode = fmerge(f, m1, m2, ma)
                     if mode != m1.execf(f):
                         ui.debug(_(" updating permissions for %s\n")
                                       % f)
                         action.append((f, "e", m2.execf(f)))
             del m2[f]
         elif f in ma:
             if n != ma[f]:
                 r = _("d")
                 if not overwrite:
                     r = ui.prompt(
                         (_(" local changed %s which remote deleted\n") % f) +
                          _("(k)eep or (d)elete?"), _("[kd]"), _("k"))
                 if r == _("d"):
                     action.append((f, "r"))
             else:
                 ui.debug(_("other deleted %s\n") % f)
                 action.append((f, "r"))
         else:
             # file is created on branch or in working directory
             if overwrite and n[20:] != "u":
                 ui.debug(_("remote deleted %s, clobbering\n") % f)
                 action.append((f, "r"))
             elif not n[20:]: # same as parent
                 if backwards:
                     ui.debug(_("remote deleted %s\n") % f)
                     action.append((f, "r"))
                 else:
                     ui.debug(_("local modified %s, keeping\n") % f)
             else:
                 ui.debug(_("working dir created %s, keeping\n") % f)
 
     for f, n in m2.iteritems():
         if f[0] == "/":
             continue
         if f in ma and n != ma[f]:
             r = _("k")
             if not overwrite:
                 r = ui.prompt(
                     (_("remote changed %s which local deleted\n") % f) +
                      _("(k)eep or (d)elete?"), _("[kd]"), _("k"))
             if r == _("k"):
                 action.append((f, "g", m2.execf(f), n))
         elif f not in ma:
             ui.debug(_("remote created %s\n") % f)
             action.append((f, "g", m2.execf(f), n))
         else:
             if overwrite or backwards:
                 ui.debug(_("local deleted %s, recreating\n") % f)
                 action.append((f, "g", m2.execf(f), n))
             else:
                 ui.debug(_("local deleted %s\n") % f)
 
     return action
 
 def update(repo, node, branchmerge=False, force=False, partial=None,
            wlock=None, show_stats=True, remind=True):
 
     overwrite = force and not branchmerge
     forcemerge = force and branchmerge
 
     if not wlock:
         wlock = repo.wlock()
 
     ### check phase
 
     pl = repo.dirstate.parents()
     if not overwrite and pl[1] != nullid:
         raise util.Abort(_("outstanding uncommitted merges"))
 
     p1, p2 = pl[0], node
     pa = repo.changelog.ancestor(p1, p2)
 
     # are we going backwards?
     backwards = (pa == p2)
 
     # is there a linear path from p1 to p2?
-    linear = (pa == p1 or pa == p2)
-    if branchmerge and linear:
-        raise util.Abort(_("there is nothing to merge, just use "
-                           "'hg update' or look at 'hg heads'"))
-
-    if not linear and not (overwrite or branchmerge):
+    if pa == p1 or pa == p2:
+        if branchmerge:
+            raise util.Abort(_("there is nothing to merge, just use "
+                               "'hg update' or look at 'hg heads'"))
+    elif not (overwrite or branchmerge):
         raise util.Abort(_("update spans branches, use 'hg merge' "
                            "or 'hg update -C' to lose changes"))
 
     status = repo.status()
     modified, added, removed, deleted, unknown = status[:5]
     if branchmerge and not forcemerge:
         if modified or added or removed:
             raise util.Abort(_("outstanding uncommitted changes"))
 
     m1 = repo.changectx(p1).manifest().copy()
     m2 = repo.changectx(p2).manifest().copy()
     ma = repo.changectx(pa).manifest()
 
     # resolve the manifest to determine which files
     # we care about merging
     repo.ui.note(_("resolving manifests\n"))
-    repo.ui.debug(_(" overwrite %s branchmerge %s partial %s linear %s\n") %
-                  (overwrite, branchmerge, bool(partial), linear))
+    repo.ui.debug(_(" overwrite %s branchmerge %s partial %s\n") %
+                  (overwrite, branchmerge, bool(partial)))
     repo.ui.debug(_(" ancestor %s local %s remote %s\n") %
                   (short(p1), short(p2), short(pa)))
 
     action = []
     m1 = workingmanifest(repo, m1, status)
 
     if not force:
         checkunknown(repo, m2, status)
-    if linear:
+    if not branchmerge:
         action += forgetremoved(m2, status)
     action += manifestmerge(repo.ui, m1, m2, ma, overwrite, backwards, partial)
     del m1, m2, ma
 
     ### apply phase
 
-    if linear or overwrite:
+    if not branchmerge:
         # we don't need to do any magic, just jump to the new rev
         p1, p2 = p2, nullid
 
     xp1, xp2 = hex(p1), hex(p2)
     if p2 == nullid: xp2 = ''
 
     repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
 
     # update files
     updated, merged, removed, unresolved = 0, 0, 0, 0
     action.sort()
     for a in action:
         f, m = a[:2]
         if f[0] == "/":
             continue
         if m == "r": # remove
             repo.ui.note(_("removing %s\n") % f)
             util.audit_path(f)
             try:
                 util.unlink(repo.wjoin(f))
             except OSError, inst:
                 if inst.errno != errno.ENOENT:
                     repo.ui.warn(_("update failed to remove %s: %s!\n") %
                                  (f, inst.strerror))
             removed +=1
         elif m == "m": # merge
             flag, my, other = a[2:]
             repo.ui.status(_("merging %s\n") % f)
             if merge3(repo, f, my, other, xp1, xp2):
                 unresolved += 1
             util.set_exec(repo.wjoin(f), flag)
             merged += 1
         elif m == "g": # get
             flag, node = a[2:]
             repo.ui.note(_("getting %s\n") % f)
             t = repo.file(f).read(node)
             repo.wwrite(f, t)
             util.set_exec(repo.wjoin(f), flag)
             updated += 1
         elif m == "e": # exec
             flag = a[2:]
             util.set_exec(repo.wjoin(f), flag)
 
     # update dirstate
     if not partial:
         repo.dirstate.setparents(p1, p2)
         for a in action:
             f, m = a[:2]
             if m == "r": # remove
                 if branchmerge:
                     repo.dirstate.update([f], 'r')
                 else:
                     repo.dirstate.forget([f])
             elif m == "f": # forget
                 repo.dirstate.forget([f])
             elif m == "g": # get
                 if branchmerge:
                     repo.dirstate.update([f], 'n', st_mtime=-1)
                 else:
                     repo.dirstate.update([f], 'n')
             elif m == "m": # merge
                 flag, my, other = a[2:]
                 if branchmerge:
                     # We've done a branch merge, mark this file as merged
                     # so that we properly record the merger later
                     repo.dirstate.update([f], 'm')
                 else:
                     # We've update-merged a locally modified file, so
                     # we set the dirstate to emulate a normal checkout
                     # of that file some time in the past. Thus our
                     # merge will appear as a normal local file
                     # modification.
                     fl = repo.file(f)
                     f_len = fl.size(fl.rev(other))
                     repo.dirstate.update([f], 'n', st_size=f_len, st_mtime=-1)
 
     if show_stats:
         stats = ((updated, _("updated")),
                  (merged - unresolved, _("merged")),
                  (removed, _("removed")),
                  (unresolved, _("unresolved")))
         note = ", ".join([_("%d files %s") % s for s in stats])
         repo.ui.status("%s\n" % note)
     if not partial:
         if branchmerge:
             if unresolved:
                 repo.ui.status(_("There are unresolved merges,"
                                 " you can redo the full merge using:\n"
                                 "  hg update -C %s\n"
                                 "  hg merge %s\n"
                                 % (repo.changelog.rev(p1),
                                     repo.changelog.rev(p2))))
             elif remind:
                 repo.ui.status(_("(branch merge, don't forget to commit)\n"))
         elif unresolved:
             repo.ui.status(_("There are unresolved merges with"
                              " locally modified files.\n"))
 
     repo.hook('update', parent1=xp1, parent2=xp2, error=unresolved)
     return unresolved
 

tests/test-merge7.out

@@ -1,78 +1,78
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 pulling from ../test-a
 searching for changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files (+1 heads)
 (run 'hg heads' to see heads, 'hg merge' to merge)
 merge: warning: conflicts during merge
 merging test.txt
 merging test.txt failed!
 0 files updated, 0 files merged, 0 files removed, 1 files unresolved
 There are unresolved merges, you can redo the full merge using:
   hg update -C 1
   hg merge 2
 pulling from ../test-a
 searching for changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files (+1 heads)
 (run 'hg heads' to see heads, 'hg merge' to merge)
 merge: warning: conflicts during merge
 resolving manifests
- overwrite None branchmerge True partial False linear False
+ overwrite None branchmerge True partial False
  ancestor 451c744aabcc local a070d41e8360 remote faaea63e63a9
  test.txt versions differ, resolve
 merging test.txt
 resolving test.txt
 file test.txt: my fc3148072371 other d40249267ae3 ancestor 8fe46a3eb557
 merging test.txt failed!
 0 files updated, 0 files merged, 0 files removed, 1 files unresolved
 There are unresolved merges, you can redo the full merge using:
   hg update -C 3
   hg merge 4
 one
 <<<<<<<
 two-point-five
 =======
 two-point-one
 >>>>>>>
 three
    rev    offset  length   base linkrev nodeid       p1           p2
      0         0       7      0       0 01365c4cca56 000000000000 000000000000
      1         7       9      1       1 7b013192566a 01365c4cca56 000000000000
      2        16      15      2       2 8fe46a3eb557 01365c4cca56 000000000000
      3        31      27      2       3 fc3148072371 7b013192566a 8fe46a3eb557
      4        58      25      4       4 d40249267ae3 8fe46a3eb557 000000000000
 changeset:   4:a070d41e8360
 tag:         tip
 parent:      2:faaea63e63a9
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     two -> two-point-one
 
 changeset:   3:451c744aabcc
 parent:      1:e409be6afcc0
 parent:      2:faaea63e63a9
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Merge 1
 
 changeset:   2:faaea63e63a9
 parent:      0:095c92b91f1a
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Numbers as words
 
 changeset:   1:e409be6afcc0
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     2 -> 2.5
 
 changeset:   0:095c92b91f1a
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Initial
 

tests/test-up-local-change.out

@@ -1,141 +1,141
 adding a
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 diff -r 33aaa84a386b a
 --- a/a
 +++ b/a
 @@ -1,1 +1,1 @@ a
 -a
 +abc
 adding b
 M a
 changeset:   0:33aaa84a386b
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     1
 
 resolving manifests
- overwrite False branchmerge False partial False linear True
+ overwrite False branchmerge False partial False
  ancestor 33aaa84a386b local 802f095af299 remote 33aaa84a386b
  a versions differ, resolve
 remote created b
 merging a
 resolving a
 file a: my b789fdd96dc2 other d730145abbf9 ancestor b789fdd96dc2
 getting b
 1 files updated, 1 files merged, 0 files removed, 0 files unresolved
 changeset:   1:802f095af299
 tag:         tip
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     2
 
 resolving manifests
- overwrite False branchmerge False partial False linear True
+ overwrite False branchmerge False partial False
  ancestor 802f095af299 local 33aaa84a386b remote 33aaa84a386b
 remote deleted b
 removing b
 0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 changeset:   0:33aaa84a386b
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     1
 
 abort: there is nothing to merge - use "hg update" instead
 failed
 changeset:   0:33aaa84a386b
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     1
 
 resolving manifests
- overwrite False branchmerge False partial False linear True
+ overwrite False branchmerge False partial False
  ancestor 33aaa84a386b local 802f095af299 remote 33aaa84a386b
  a versions differ, resolve
 remote created b
 merging a
 resolving a
 file a: my b789fdd96dc2 other d730145abbf9 ancestor b789fdd96dc2
 getting b
 1 files updated, 1 files merged, 0 files removed, 0 files unresolved
 changeset:   1:802f095af299
 tag:         tip
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     2
 
 changeset:   1:802f095af299
 tag:         tip
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 files:       a b
 description:
 2
 
 
 changeset:   0:33aaa84a386b
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 files:       a
 description:
 1
 
 
 diff -r 802f095af299 a
 --- a/a
 +++ b/a
 @@ -1,1 +1,1 @@ a2
 -a2
 +abc
 1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 adding b
 M a
 changeset:   1:802f095af299
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     2
 
 abort: update spans branches, use 'hg merge' or 'hg update -C' to lose changes
 failed
 abort: outstanding uncommitted changes
 failed
 resolving manifests
- overwrite False branchmerge True partial False linear False
+ overwrite False branchmerge True partial False
  ancestor 802f095af299 local 030602aee63d remote 33aaa84a386b
  a versions differ, resolve
  b versions differ, resolve
 merging a
 resolving a
 file a: my d730145abbf9 other 13e0d5f949fa ancestor b789fdd96dc2
 merging b
 resolving b
 file b: my 1e88685f5dde other 61de8c7723ca ancestor 000000000000
 0 files updated, 2 files merged, 0 files removed, 0 files unresolved
 (branch merge, don't forget to commit)
 changeset:   1:802f095af299
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     2
 
 changeset:   2:030602aee63d
 tag:         tip
 parent:      0:33aaa84a386b
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     3
 
 diff -r 802f095af299 a
 --- a/a
 +++ b/a
 @@ -1,1 +1,1 @@ a2
 -a2
 +abc
 adding a
 pulling from ../a
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 merging a
 0 files updated, 1 files merged, 0 files removed, 0 files unresolved

tests/test-update-reverse.out

@@ -1,54 +1,54
 0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 Main should be gone
 a
 changeset:   3:ded32b0db104
 tag:         tip
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Added side2
 
 changeset:   2:92a816cea698
 parent:      0:537353581d3d
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Added side1
 
 changeset:   1:221226fb2bd8
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Added main
 
 changeset:   0:537353581d3d
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Added a
 
 Should have two heads, side2 and main
 changeset:   3:ded32b0db104
 tag:         tip
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Added side2
 
 changeset:   1:221226fb2bd8
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     Added main
 
 Should show a side1 side2
 a
 side1
 side2
 resolving manifests
- overwrite True branchmerge False partial False linear False
+ overwrite True branchmerge False partial False
  ancestor ded32b0db104 local 221226fb2bd8 remote 537353581d3d
 remote deleted side2, clobbering
 remote deleted side1, clobbering
 remote created main
 getting main
 removing side1
 removing side2
 1 files updated, 0 files merged, 2 files removed, 0 files unresolved
 Should only show a main
 a
 main