view tests/test-stack-branch.t @ 6935:954d7ea5cd67 stable

stack: when stack base is obsolete, pick any successor, even if at random

There are situations when s0 is obsolete and we also cannot pick just one
successor for it to use in stack. In such a case, let's pick the "latest"
successor from the first set.

We're assuming that obsutil.successorssets() returns data in the same order (it
should, since it makes sure to sort data internally). Keeping that in mind,
while the successor picked for s0 by this code is not based on any sort of
sophisticated logic, it should nonetheless be the same every time.

This patch is probably not going to completely break anything that was
previously working fine, because the previous behavior was to just abort with
an exception.

  $ . "$TESTDIR/testlib/topic_setup.sh"

Initial setup

  $ cat << EOF >> $HGRCPATH
  > [ui]
  > logtemplate = {rev} {branch} \{{get(namespaces, "topics")}} {phase} {desc|firstline}\n
  > [experimental]
  > evolution=createmarkers,exchange,allowunstable
  > EOF

  $ hg init main
  $ cd main
  $ hg branch double//slash
  marked working directory as branch double//slash
  (branches are permanent and global, did you want a bookmark?)
  $ echo aaa > aaa
  $ hg add aaa
  $ hg commit -m c_a
  $ echo aaa > bbb
  $ hg add bbb
  $ hg commit -m c_b
  $ hg branch foo//bar
  marked working directory as branch foo//bar
  $ echo aaa > ccc
  $ hg add ccc
  $ hg commit -m c_c
  $ echo aaa > ddd
  $ hg add ddd
  $ hg commit -m c_d
  $ echo aaa > eee
  $ hg add eee
  $ hg commit -m c_e
  $ echo aaa > fff
  $ hg add fff
  $ hg commit -m c_f
  $ hg log -G
  @  5 foo//bar {} draft c_f
  |
  o  4 foo//bar {} draft c_e
  |
  o  3 foo//bar {} draft c_d
  |
  o  2 foo//bar {} draft c_c
  |
  o  1 double//slash {} draft c_b
  |
  o  0 double//slash {} draft c_a
  

Commit extras have branch name without formatting
-------------------------------------------------

  $ hg log -r 1 -T '{rev}: {join(extras, " ")}\n'
  1: branch=double//slash
  $ hg log -r 5 -T '{rev}: {join(extras, " ")}\n'
  5: branch=foo//bar

Check that branch without any parent does not crash stack
---------------------------------------------------------

  $ hg up double//slash//
  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ hg stack
  ### target: double//slash (branch)
  s2@ c_b (current)
  s1: c_a
  $ hg phase --public 'branch("double//slash//")'
  $ hg up foo//bar//
  4 files updated, 0 files merged, 0 files removed, 0 files unresolved

Simple test
-----------

'hg stack' lists all changeset on the branch

  $ hg branch
  foo//bar
  $ hg stack
  ### target: foo//bar (branch)
  s4@ c_f (current)
  s3: c_e
  s2: c_d
  s1: c_c
  s0^ c_b (base)
  $ hg stack -v
  ### target: foo//bar (branch)
  s4(18b3ff044de9)@ c_f (current)
  s3(b1913e064ca1): c_e
  s2(8fad7e98adf6): c_d
  s1(da14ac95d156): c_c
  s0(2450a061c0f0)^ c_b (base)

Test "s#" reference
-------------------

  $ hg up s2
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg up foo//bar//
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg up s42
  abort: cannot resolve "s42": branch "foo//bar//" has only 4 non-public changesets
  [255]
  $ hg up s2
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg summary
  parent: 3:8fad7e98adf6 
   c_d
  branch: foo//bar//
  commit: (clean)
  update: 2 new changesets (update)
  phases: 4 draft

Case with some of the branch unstable
-------------------------------------

  $ echo bbb > ddd
  $ hg commit --amend
  2 new orphan changesets
  $ hg log -G
  @  6 foo//bar {} draft c_d
  |
  | *  5 foo//bar {} draft c_f
  | |
  | *  4 foo//bar {} draft c_e
  | |
  | x  3 foo//bar {} draft c_d
  |/
  o  2 foo//bar {} draft c_c
  |
  o  1 double//slash {} public c_b
  |
  o  0 double//slash {} public c_a
  
  $ hg stack
  ### target: foo//bar (branch)
  s4$ c_f (orphan)
  s3$ c_e (orphan)
  s2@ c_d (current)
  s1: c_c
  s0^ c_b (base)
  $ hg up s3
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg stack
  ### target: foo//bar (branch)
  s4$ c_f (orphan)
  s3@ c_e (current orphan)
  s2: c_d
  s1: c_c
  s0^ c_b (base)
  $ hg up s2
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

Also test the revset:

  $ hg log -r 'stack()'
  2 foo//bar {} draft c_c
  6 foo//bar {} draft c_d
  4 foo//bar {} draft c_e
  5 foo//bar {} draft c_f

Case with multiple heads on the branch
--------------------------------------

Make things linear again

  $ hg rebase -s 'desc(c_e)' -d 'desc(c_d) - obsolete()'
  rebasing 4:b1913e064ca1 "c_e"
  rebasing 5:18b3ff044de9 "c_f"
  $ hg log -G
  o  8 foo//bar {} draft c_f
  |
  o  7 foo//bar {} draft c_e
  |
  @  6 foo//bar {} draft c_d
  |
  o  2 foo//bar {} draft c_c
  |
  o  1 double//slash {} public c_b
  |
  o  0 double//slash {} public c_a
  

Create the second head

  $ hg up 'desc(c_d)'
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo aaa > ggg
  $ hg add ggg
  $ hg commit -m c_g
  created new head
  (consider using topic for lightweight branches. See 'hg help topic')
  $ echo aaa > hhh
  $ hg add hhh
  $ hg commit -m c_h
  $ hg log -G
  @  10 foo//bar {} draft c_h
  |
  o  9 foo//bar {} draft c_g
  |
  | o  8 foo//bar {} draft c_f
  | |
  | o  7 foo//bar {} draft c_e
  |/
  o  6 foo//bar {} draft c_d
  |
  o  2 foo//bar {} draft c_c
  |
  o  1 double//slash {} public c_b
  |
  o  0 double//slash {} public c_a
  

Test output

  $ hg stack
  ### target: foo//bar (branch) (2 heads)
  s6@ c_h (current)
  s5: c_g
  s2^ c_d (base)
  s4: c_f
  s3: c_e
  s2: c_d
  s1: c_c
  s0^ c_b (base)

Case with multiple heads on the branch with instability involved
----------------------------------------------------------------

We amend the message to make sure the display base pick the right changeset

  $ hg up 'desc(c_d)'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo ccc > ddd
  $ hg commit --amend -m 'c_D' 
  4 new orphan changesets
  $ hg rebase -d . -s 'desc(c_g)'
  rebasing 9:8c1819a4441f "c_g"
  rebasing 10:e255b784f0e9 "c_h"
  $ hg log -G
  o  13 foo//bar {} draft c_h
  |
  o  12 foo//bar {} draft c_g
  |
  @  11 foo//bar {} draft c_D
  |
  | *  8 foo//bar {} draft c_f
  | |
  | *  7 foo//bar {} draft c_e
  | |
  | x  6 foo//bar {} draft c_d
  |/
  o  2 foo//bar {} draft c_c
  |
  o  1 double//slash {} public c_b
  |
  o  0 double//slash {} public c_a
  

  $ hg stack
  ### target: foo//bar (branch) (2 heads)
  s6: c_h
  s5: c_g
  s2^ c_D (base current)
  s4$ c_f (orphan)
  s3$ c_e (orphan)
  s2@ c_D (current)
  s1: c_c
  s0^ c_b (base)

Check that stack doesn't show public changesets on a branch
-----------------------------------------------------------

  $ hg log --graph
  o  13 foo//bar {} draft c_h
  |
  o  12 foo//bar {} draft c_g
  |
  @  11 foo//bar {} draft c_D
  |
  | *  8 foo//bar {} draft c_f
  | |
  | *  7 foo//bar {} draft c_e
  | |
  | x  6 foo//bar {} draft c_d
  |/
  o  2 foo//bar {} draft c_c
  |
  o  1 double//slash {} public c_b
  |
  o  0 double//slash {} public c_a
  

  $ hg stack
  ### target: foo//bar (branch) (2 heads)
  s6: c_h
  s5: c_g
  s2^ c_D (base current)
  s4$ c_f (orphan)
  s3$ c_e (orphan)
  s2@ c_D (current)
  s1: c_c
  s0^ c_b (base)
  $ hg phase --public s1
  $ hg stack
  ### target: foo//bar (branch) (2 heads)
  s5: c_h
  s4: c_g
  s1^ c_D (base current)
  s3$ c_f (orphan)
  s2$ c_e (orphan)
  s1@ c_D (current)
  s0^ c_c (base)

Check that stack doesn't show changesets with a topic
-----------------------------------------------------

  $ hg topic --rev s4::s5 sometopic
  changed topic on 2 changesets to "sometopic"
  $ hg stack
  ### target: foo//bar (branch)
  s3$ c_f (orphan)
  s2$ c_e (orphan)
  s1@ c_D (current)
  s0^ c_c (base)