view tests/test-pathconflicts-basic.t @ 35746:e5b6ba786d83

branch: allow changing branch name to existing name if possible

With the functionality added in previous patch we can change branches of a
revision but not everytime even if it's possible to do so. For example cosider
the following case:

o 3  added a (foo)
o 2  added b (foo)
o 1  added c (bar)
o 0  added d (bar)

Here if I want to change the branch of rev 2,3 to bar, it was not possible and
it will say, "a branch with same name exists".

This patch allows us to change branch of 2,3 to bar. The underlying logic for
changing branch finds the changesets from the revs passed which have no parents
in revs. We only support revsets which have only one such root, so to support
this we check whether the parent of the root has the same name as that of the
new name and if so, we can use the new name to change branches.

Differential Revision: https://phab.mercurial-scm.org/D1913

Path conflict checking is currently disabled by default because of issue5716.
Turn it on for this test.

  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > merge.checkpathconflicts=True
  > EOF

  $ hg init repo
  $ cd repo
  $ echo base > base
  $ hg add base
  $ hg commit -m "base"
  $ hg bookmark -i base
  $ echo 1 > a
  $ hg add a
  $ hg commit -m "file"
  $ hg bookmark -i file
  $ echo 2 > a
  $ hg commit -m "file2"
  $ hg bookmark -i file2
  $ hg up -q 0
  $ mkdir a
  $ echo 2 > a/b
  $ hg add a/b
  $ hg commit -m "dir"
  created new head
  $ hg bookmark -i dir

Basic merge - local file conflicts with remote directory

  $ hg up -q file
  $ hg bookmark -i
  $ hg merge --verbose dir
  resolving manifests
  a: path conflict - a file or link has the same name as a directory
  the local file has been renamed to a~853701544ac3
  resolve manually then use 'hg resolve --mark a'
  moving a to a~853701544ac3
  getting a/b
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg update --clean .
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ rm a~853701544ac3

Basic update - local directory conflicts with remote file

  $ hg up -q 0
  $ mkdir a
  $ echo 3 > a/b
  $ hg up file
  a: untracked directory conflicts with file
  abort: untracked files in working directory differ from files in requested revision
  [255]
  $ hg up --clean file
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark file)

Repo state is ok

  $ hg sum
  parent: 1:853701544ac3 
   file
  branch: default
  bookmarks: *file
  commit: (clean)
  update: 2 new changesets (update)
  phases: 4 draft

Basic update - untracked file conflicts with remote directory

  $ hg up -q 0
  $ echo untracked > a
  $ hg up --config merge.checkunknown=warn dir
  a: replacing untracked file
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark dir)
  $ cat a.orig
  untracked
  $ rm -f a.orig

Basic clean update - local directory conflicts with changed remote file

  $ hg up -q file
  $ rm a
  $ mkdir a
  $ echo 4 > a/b
  $ hg up file2
  abort: *: '$TESTTMP/repo/a' (glob)
  [255]
  $ hg up --clean file2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark file2)

Repo state is ok

  $ hg sum
  parent: 2:f64e09fac717 
   file2
  branch: default
  bookmarks: *file2
  commit: (clean)
  update: 1 new changesets, 2 branch heads (merge)
  phases: 4 draft