view tests/test-conflict.t @ 44450:7d5455b988ec stable

discovery: avoid wrong detection of multiple branch heads (issue6256)

This fix the code using obsolescence markers to remove "to be obsoleted" heads
during the detection of new head creation from push. The code turned out to not
use the branch information at all. This lead changeset from different branch to
be detected as new head on unrelated branch.

The code fix is actually quite simple. New tests have been added to covers
these cases.

Differential Revision: https://phab.mercurial-scm.org/D8259

  $ hg init
  $ cat << EOF > a
  > Small Mathematical Series.
  > One
  > Two
  > Three
  > Four
  > Five
  > Hop we are done.
  > EOF
  $ hg add a
  $ hg commit -m ancestor
  $ cat << EOF > a
  > Small Mathematical Series.
  > 1
  > 2
  > 3
  > 4
  > 5
  > Hop we are done.
  > EOF
  $ hg commit -m branch1
  $ hg co 0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat << EOF > a
  > Small Mathematical Series.
  > 1
  > 2
  > 3
  > 6
  > 8
  > Hop we are done.
  > EOF
  $ hg commit -m branch2
  created new head

  $ hg merge 1
  merging a
  warning: conflicts while merging a! (edit, 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 merge --abort' to abandon
  [1]

  $ hg id
  618808747361+c0c68e4fe667+ tip

  $ echo "[commands]" >> $HGRCPATH
  $ echo "status.verbose=true" >> $HGRCPATH
  $ hg status
  M a
  ? a.orig
  # The repository is in an unfinished *merge* state.
  
  # Unresolved merge conflicts:
  # 
  #     a
  # 
  # To mark files as resolved:  hg resolve --mark FILE
  
  # To continue:    hg commit
  # To abort:       hg merge --abort
  
  $ hg status -Tjson
  [
   {
    "itemtype": "file",
    "path": "a",
    "status": "M",
    "unresolved": true
   },
   {
    "itemtype": "file",
    "path": "a.orig",
    "status": "?"
   },
   {
    "itemtype": "morestatus",
    "unfinished": "merge",
    "unfinishedmsg": "To continue:    hg commit\nTo abort:       hg merge --abort"
   }
  ]

  $ cat a
  Small Mathematical Series.
  1
  2
  3
  <<<<<<< working copy: 618808747361 - test: branch2
  6
  8
  =======
  4
  5
  >>>>>>> merge rev:    c0c68e4fe667 - test: branch1
  Hop we are done.

  $ hg status --config commands.status.verbose=0
  M a
  ? a.orig

Verify custom conflict markers

  $ hg up -q --clean .
  $ cat <<EOF >> .hg/hgrc
  > [ui]
  > mergemarkertemplate = '{author} {rev}'
  > EOF

  $ hg merge 1
  merging a
  warning: conflicts while merging a! (edit, 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 merge --abort' to abandon
  [1]

  $ cat a
  Small Mathematical Series.
  1
  2
  3
  <<<<<<< working copy: test 2
  6
  8
  =======
  4
  5
  >>>>>>> merge rev:    test 1
  Hop we are done.

Verify line splitting of custom conflict marker which causes multiple lines

  $ hg up -q --clean .
  $ cat >> .hg/hgrc <<EOF
  > [ui]
  > mergemarkertemplate={author} {rev}\nfoo\nbar\nbaz
  > EOF

  $ hg -q merge 1
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  [1]

  $ cat a
  Small Mathematical Series.
  1
  2
  3
  <<<<<<< working copy: test 2
  6
  8
  =======
  4
  5
  >>>>>>> merge rev:    test 1
  Hop we are done.

Verify line trimming of custom conflict marker using multi-byte characters

  $ hg up -q --clean .
  $ "$PYTHON" <<EOF
  > fp = open('logfile', 'wb')
  > fp.write(b'12345678901234567890123456789012345678901234567890' +
  >          b'1234567890') # there are 5 more columns for 80 columns
  > 
  > # 2 x 4 = 8 columns, but 3 x 4 = 12 bytes
  > fp.write(u'\u3042\u3044\u3046\u3048'.encode('utf-8'))
  > 
  > fp.close()
  > EOF
  $ hg add logfile
  $ hg --encoding utf-8 commit --logfile logfile

  $ cat >> .hg/hgrc <<EOF
  > [ui]
  > mergemarkertemplate={desc|firstline}
  > EOF

  $ hg -q --encoding utf-8 merge 1
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  [1]

  $ cat a
  Small Mathematical Series.
  1
  2
  3
  <<<<<<< working copy: 1234567890123456789012345678901234567890123456789012345...
  6
  8
  =======
  4
  5
  >>>>>>> merge rev:    branch1
  Hop we are done.

Verify basic conflict markers

  $ hg up -q --clean 2
  $ printf "\n[ui]\nmergemarkers=basic\n" >> .hg/hgrc

  $ hg merge 1
  merging a
  warning: conflicts while merging a! (edit, 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 merge --abort' to abandon
  [1]

  $ cat a
  Small Mathematical Series.
  1
  2
  3
  <<<<<<< working copy
  6
  8
  =======
  4
  5
  >>>>>>> merge rev
  Hop we are done.

internal:merge3

  $ hg up -q --clean .

  $ hg merge 1 --tool internal:merge3
  merging a
  warning: conflicts while merging a! (edit, 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 merge --abort' to abandon
  [1]
  $ cat a
  Small Mathematical Series.
  <<<<<<< working copy
  1
  2
  3
  6
  8
  ||||||| base
  One
  Two
  Three
  Four
  Five
  =======
  1
  2
  3
  4
  5
  >>>>>>> merge rev
  Hop we are done.

Add some unconflicting changes on each head, to make sure we really
are merging, unlike :local and :other

  $ hg up -C
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to "e0693e20f496: 123456789012345678901234567890123456789012345678901234567890????"
  1 other heads for branch "default"
  $ printf "\n\nEnd of file\n" >> a
  $ hg ci -m "Add some stuff at the end"
  $ hg up -r 1
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ printf "Start of file\n\n\n" > tmp
  $ cat a >> tmp
  $ mv tmp a
  $ hg ci -m "Add some stuff at the beginning"

Now test :merge-other and :merge-local

  $ hg merge
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  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 resolve --tool :merge-other a
  merging a
  (no more unresolved files)
  $ cat a
  Start of file
  
  
  Small Mathematical Series.
  1
  2
  3
  6
  8
  Hop we are done.
  
  
  End of file

  $ hg up -C
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "18b51d585961: Add some stuff at the beginning"
  1 other heads for branch "default"
  $ hg merge --tool :merge-local
  merging a
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ cat a
  Start of file
  
  
  Small Mathematical Series.
  1
  2
  3
  4
  5
  Hop we are done.
  
  
  End of file