tests/test-rename-dir-merge.t

memctx: calculate manifest more efficiently

Before this patch, "memctx._manifest" updates all entries in the
(parent) manifest. But this is inefficiency, because almost all files
may be clean in that context.

On the other hand, just updating entries for changed "files" specified
at construction causes unexpected abortion, when there is at least one
newly removed file (see issue4470 for detail).

To calculate manifest more efficiently, this patch replaces
"pman.iteritems()" for the loop by "self._status.modified" to avoid
updating entries for clean or removed files

Examination of removal is also omitted, because removed files aren't
treated in this loop (= "self[f]" returns not None always).

  $ hg init t
  $ cd t

  $ mkdir a
  $ echo foo > a/a
  $ echo bar > a/b
  $ hg ci -Am "0"
  adding a/a
  adding a/b

  $ hg co -C 0
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg mv a b
  moving a/a to b/a (glob)
  moving a/b to b/b (glob)
  $ hg ci -m "1 mv a/ b/"

  $ hg co -C 0
  2 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo baz > a/c
  $ echo quux > a/d
  $ hg add a/c
  $ hg ci -m "2 add a/c"
  created new head

  $ hg merge --debug 1
    searching for copies back to rev 1
    unmatched files in local:
     a/c
    unmatched files in other:
     b/a
     b/b
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     src: 'a/a' -> dst: 'b/a' 
     src: 'a/b' -> dst: 'b/b' 
    checking for directory renames
     discovered dir src: 'a/' -> dst: 'b/'
     pending file src: 'a/c' -> dst: 'b/c'
  resolving manifests
   branchmerge: True, force: False, partial: False
   ancestor: f9b20c0d4c51, local: ce36d17b18fb+, remote: 397f8b00a740
   a/a: other deleted -> r
  removing a/a
   a/b: other deleted -> r
  removing a/b
  updating: a/b 2/5 files (40.00%)
   b/a: remote created -> g
  getting b/a
   b/b: remote created -> g
  getting b/b
  updating: b/b 4/5 files (80.00%)
   b/c: remote directory rename - move from a/c -> dm
  updating: b/c 5/5 files (100.00%)
  moving a/c to b/c (glob)
  3 files updated, 0 files merged, 2 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ echo a/* b/*
  a/d b/a b/b b/c
  $ hg st -C
  M b/a
  M b/b
  A b/c
    a/c
  R a/a
  R a/b
  R a/c
  ? a/d
  $ hg ci -m "3 merge 2+1"
  $ hg debugrename b/c
  b/c renamed from a/c:354ae8da6e890359ef49ade27b68bbc361f3ca88 (glob)

  $ hg co -C 1
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge --debug 2
    searching for copies back to rev 1
    unmatched files in local:
     b/a
     b/b
    unmatched files in other:
     a/c
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     src: 'a/a' -> dst: 'b/a' 
     src: 'a/b' -> dst: 'b/b' 
    checking for directory renames
     discovered dir src: 'a/' -> dst: 'b/'
     pending file src: 'a/c' -> dst: 'b/c'
  resolving manifests
   branchmerge: True, force: False, partial: False
   ancestor: f9b20c0d4c51, local: 397f8b00a740+, remote: ce36d17b18fb
   b/c: local directory rename - get from a/c -> dg
  updating: b/c 1/1 files (100.00%)
  getting a/c to b/c
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ echo a/* b/*
  a/d b/a b/b b/c
  $ hg st -C
  A b/c
    a/c
  ? a/d
  $ hg ci -m "4 merge 1+2"
  created new head
  $ hg debugrename b/c
  b/c renamed from a/c:354ae8da6e890359ef49ade27b68bbc361f3ca88 (glob)

Local directory rename with conflicting file added in remote source directory
and untracked in local target directory.

BROKEN: the uncommitted file is overwritten; we should abort

  $ hg co -qC 1
  $ echo target > b/c
  $ hg merge 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st -A
  A b/c
    a/c
  ? a/d
  C b/a
  C b/b
  $ cat b/c
  baz

Local directory rename with conflicting file added in remote source directory
and committed in local target directory.

  $ hg co -qC 1
  $ echo target > b/c
  $ hg add b/c
  $ hg commit -qm 'new file in target directory'
  $ hg merge 2
  merging b/c and a/c to b/c
  warning: conflicts during merge.
  merging b/c incomplete! (edit conflicts, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
  [1]
  $ hg st -A
  M b/c
    a/c
  ? a/d
  ? b/c.orig
  C b/a
  C b/b
  $ cat b/c
  <<<<<<< local: f1c50ca4f127 - test: new file in target directory
  target
  =======
  baz
  >>>>>>> other: ce36d17b18fb  - test: 2 add a/c
  $ rm b/c.orig

Remote directory rename with conflicting file added in remote target directory
and committed in local source directory.

  $ hg co -qC 2
  $ hg st -A
  ? a/d
  C a/a
  C a/b
  C a/c
  $ hg merge 5
  merging a/c and b/c to b/c
  warning: conflicts during merge.
  merging b/c incomplete! (edit conflicts, then use 'hg resolve --mark')
  2 files updated, 0 files merged, 2 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
  [1]
  $ hg st -A
  M b/a
  M b/b
  M b/c
    a/c
  R a/a
  R a/b
  R a/c
  ? a/d
  ? b/c.orig
  $ cat b/c
  <<<<<<< local: ce36d17b18fb  - test: 2 add a/c
  baz
  =======
  target
  >>>>>>> other: f1c50ca4f127 - test: new file in target directory

Second scenario with two repos:

  $ cd ..
  $ hg init r1
  $ cd r1
  $ mkdir a
  $ echo foo > a/f
  $ hg add a
  adding a/f (glob)
  $ hg ci -m "a/f == foo"
  $ cd ..

  $ hg clone r1 r2
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd r2
  $ hg mv a b
  moving a/f to b/f (glob)
  $ echo foo1 > b/f
  $ hg ci -m" a -> b, b/f == foo1"
  $ cd ..

  $ cd r1
  $ mkdir a/aa
  $ echo bar > a/aa/g
  $ hg add a/aa
  adding a/aa/g (glob)
  $ hg ci -m "a/aa/g"
  $ hg pull ../r2
  pulling from ../r2
  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)

  $ hg merge
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg st -C
  M b/f
  A b/aa/g
    a/aa/g
  R a/aa/g
  R a/f

  $ cd ..