view tests/test-sharing.t @ 6889:a66cf9008781

obslog: also display patch for rebased changesets

This applies the same logic that is used for "merge-diff" to rebased
changesets. The successors' content is compared to the content of the
predecessors rebased in-memory on the new parents.

This highlights the changes that were actually introduced while rebasing (like
conflict resolution or API adjustment).

As a side effect, obslog now also outputs slightly more diffs for splits,
showing what parts of the original big changeset were moved to the smaller
split components (but for now it only works for the first few changesets).

Test script based on sharing.rst: ensure that all scenarios in that
document work as advertised.

Setting things up

  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > shortlog = log --template '{rev}:{node|shortest}  {phase}  {desc|firstline}\n'
  > [extensions]
  > rebase =
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
  $ hg init public
  $ hg clone public test-repo
  updating to branch default
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg clone test-repo dev-repo
  updating to branch default
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat >> test-repo/.hg/hgrc <<EOF
  > [phases]
  > publish = false
  > EOF

To start things off, let's make one public, immutable changeset::

  $ cd test-repo
  $ echo 'my new project' > file1
  $ hg add file1
  $ hg commit -m'create new project'
  $ hg push
  pushing to $TESTTMP/public (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

and pull that into the development repository::

  $ cd ../dev-repo
  $ hg pull -u
  pulling from $TESTTMP/test-repo (glob)
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets 0dc9c9f6ab91
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

Let's commit a preliminary change and push it to ``test-repo`` for
testing. ::

  $ echo 'fix fix fix' > file1
  $ hg commit -m'prelim change'
  $ hg push -q ../test-repo

Figure SG01 (roughly)
  $ hg -R ../dev-repo shortlog -G
  @  1:f649  draft  prelim change
  |
  o  0:0dc9  public  create new project
  
  $ hg -R ../test-repo shortlog -G
  o  1:f649  draft  prelim change
  |
  @  0:0dc9  public  create new project
  
Now let's switch to test-repo to test our change and amend::
  $ cd ../test-repo
  $ hg update -q
  $ echo 'Fix fix fix' > file1
  $ hg amend -m'fix bug 37'
  $ echo 'Fix fix fix.' > file1
  $ hg amend -m'fix bug 37'

Figure SG02
  $ hg -R ../dev-repo shortlog --hidden -G
  @  1:f649  draft  prelim change
  |
  o  0:0dc9  public  create new project
  
  $ hg -R ../test-repo shortlog --hidden -G
  @  3:522d  draft  fix bug 37
  |
  | x  2:96d8  draft  fix bug 37
  |/
  | x  1:f649  draft  prelim change
  |/
  o  0:0dc9  public  create new project
  
Pull into dev-repo: obsolescence markers are transferred, but not
the new obsolete changeset.
  $ cd ../dev-repo
  $ hg pull -u
  pulling from $TESTTMP/test-repo (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  2 new obsolescence markers
  obsoleted 1 changesets
  new changesets 522d503432a2 (1 drafts)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

Figure SG03
  $ hg -R ../dev-repo shortlog --hidden -G
  @  2:522d  draft  fix bug 37
  |
  | x  1:f649  draft  prelim change
  |/
  o  0:0dc9  public  create new project
  
Amend again in dev-repo
  $ echo 'Fix, fix, and fix' > file1
  $ hg amend
  $ echo 'Fix, fix, and fix.' > file1
  $ hg amend
  $ hg push -q

Figure SG04 (dev-repo)
  $ hg shortlog --hidden -G
  @  4:7b49  draft  fix bug 37
  |
  | x  3:e42b  draft  fix bug 37
  |/
  | x  2:522d  draft  fix bug 37
  |/
  | x  1:f649  draft  prelim change
  |/
  o  0:0dc9  public  create new project
  
Figure SG04 (test-repo)
  $ cd ../test-repo
  $ hg update
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg shortlog --hidden -G
  @  4:7b49  draft  fix bug 37
  |
  | x  3:522d  draft  fix bug 37
  |/
  | x  2:96d8  draft  fix bug 37
  |/
  | x  1:f649  draft  prelim change
  |/
  o  0:0dc9  public  create new project
  
This bug fix is finished. We can push it to the public repository.
  $ hg push
  pushing to $TESTTMP/public (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  4 new obsolescence markers

Now that the fix is public, we cannot amend it any more.
  $ hg amend -m 'fix bug 37'
  abort: cannot amend public changesets: 7b49f864d655
  (see 'hg help phases' for details)
  [10]

Figure SG05
  $ hg -R ../public shortlog -G
  o  1:7b49  public  fix bug 37
  |
  o  0:0dc9  public  create new project
  
Oops, still have draft changesets in dev-repo: push the phase change there.
  $ hg -R ../dev-repo shortlog -r 'draft()'
  4:7b49  draft  fix bug 37
  $ hg push ../dev-repo
  pushing to ../dev-repo
  searching for changes
  no changes found
  [1]
  $ hg -R ../dev-repo shortlog -r 'draft()'

Sharing with multiple developers: code review

  $ cd ..
  $ hg clone public review
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg clone review alice
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg clone review bob
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat >> review/.hg/hgrc <<EOF
  > [phases]
  > publish = false
  > EOF

Alice commits a draft bug fix, pushes to review repo.
  $ cd alice
  $ hg bookmark bug15
  $ echo 'fix' > file2
  $ hg commit -A -u alice -m 'fix bug 15 (v1)'
  adding file2
  $ hg push -B bug15
  pushing to $TESTTMP/review (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  exporting bookmark bug15
  $ hg -R ../review bookmarks
     bug15                     2:4e965c66c983

Alice receives code review, amends her fix, and goes out to lunch to
await second review.
  $ echo 'Fix.' > file2
  $ hg amend -m 'fix bug 15 (v2)'
  $ hg push
  pushing to $TESTTMP/review (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  obsoleted 1 changesets
  updating bookmark bug15
  $ hg -R ../review bookmarks
     bug15                     3:3363442626b3

Figure SG06: review repository after Alice pushes her amended changeset.
  $ hg --hidden -R ../review shortlog -G -r 1::
  o  3:3363  draft  fix bug 15 (v2)
  |
  | x  2:4e96  draft  fix bug 15 (v1)
  |/
  @  1:7b49  public  fix bug 37
  |
  ~

Bob commits a draft changeset, pushes to review repo.
  $ cd ../bob
  $ echo 'stuff' > file1
  $ hg bookmark featureX
  $ hg commit -u bob -m 'implement feature X (v1)'
  $ hg push -B featureX
  pushing to $TESTTMP/review (glob)
  searching for changes
  remote has heads on branch 'default' that are not known locally: 3363442626b3
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  exporting bookmark featureX
  $ hg -R ../review bookmarks
     bug15                     3:3363442626b3
     featureX                  4:c7ff98c7916f

Bob receives first review, amends and pushes.
  $ echo 'do stuff' > file1
  $ hg amend -m 'implement feature X (v2)'
  $ hg push
  pushing to $TESTTMP/review (glob)
  searching for changes
  remote has heads on branch 'default' that are not known locally: 3363442626b3
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  obsoleted 1 changesets
  updating bookmark featureX

Bob receives second review, amends, and pushes to public:
this time, he's sure he got it right!
  $ echo 'Do stuff.' > file1
  $ hg amend -m 'implement feature X (v3)'
  $ hg push ../public
  pushing to ../public
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  2 new obsolescence markers
  $ hg -R ../public bookmarks
  no bookmarks set
  $ hg push ../review
  pushing to ../review
  searching for changes
  remote has heads on branch 'default' that are not known locally: 3363442626b3
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  obsoleted 1 changesets
  updating bookmark featureX
  $ hg -R ../review bookmarks
     bug15                     3:3363442626b3
     featureX                  6:9d21d673314a

Figure SG07: review and public repos after Bob implements feature X.
  $ hg --hidden -R ../review shortlog -G -r 1::
  o  6:9d21  public  implement feature X (v3)
  |
  | x  5:1bb4  draft  implement feature X (v2)
  |/
  | x  4:c7ff  draft  implement feature X (v1)
  |/
  | o  3:3363  draft  fix bug 15 (v2)
  |/
  | x  2:4e96  draft  fix bug 15 (v1)
  |/
  @  1:7b49  public  fix bug 37
  |
  ~
  $ hg --hidden -R ../public shortlog -G -r 1::
  o  2:9d21  public  implement feature X (v3)
  |
  o  1:7b49  public  fix bug 37
  |
  ~

Meantime, Alice is back from lunch. While she was away, Bob approved
her change, so now she can publish it.
  $ cd ../alice
  $ hg --hidden shortlog -G -r 1::
  @  3:3363  draft  fix bug 15 (v2)
  |
  | x  2:4e96  draft  fix bug 15 (v1)
  |/
  o  1:7b49  public  fix bug 37
  |
  ~
  $ hg outgoing -q ../public
  3:3363442626b3
  $ hg push ../public
  pushing to ../public
  searching for changes
  remote has heads on branch 'default' that are not known locally: 9d21d673314a
  abort: push creates new remote head 3363442626b3 with bookmark 'bug15'
  (pull and merge or see 'hg help push' for details about pushing new heads)
  [20]
  $ hg pull ../public
  pulling from ../public
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  2 new obsolescence markers
  new changesets 9d21d673314a
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg log -G -q -r 'head()'
  o  4:9d21d673314a
  |
  ~
  @  3:3363442626b3
  |
  ~
  $ hg --hidden shortlog -G -r 1::
  o  4:9d21  public  implement feature X (v3)
  |
  | @  3:3363  draft  fix bug 15 (v2)
  |/
  | x  2:4e96  draft  fix bug 15 (v1)
  |/
  o  1:7b49  public  fix bug 37
  |
  ~

Alice rebases her draft changeset on top of Bob's public changeset and
publishes the result.
  $ hg rebase -d 4
  rebasing 3:3363442626b3 bug15 "fix bug 15 (v2)"
  $ hg push ../public
  pushing to ../public
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  2 new obsolescence markers
  $ hg push ../review
  pushing to ../review
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 1 files
  1 new obsolescence markers
  obsoleted 1 changesets
  updating bookmark bug15

Figure SG08: review and public changesets after Alice pushes.
  $ hg --hidden -R ../review shortlog -G -r 1::
  o  7:dd15  public  fix bug 15 (v2)
  |
  o  6:9d21  public  implement feature X (v3)
  |
  | x  5:1bb4  draft  implement feature X (v2)
  |/
  | x  4:c7ff  draft  implement feature X (v1)
  |/
  | x  3:3363  draft  fix bug 15 (v2)
  |/
  | x  2:4e96  draft  fix bug 15 (v1)
  |/
  @  1:7b49  public  fix bug 37
  |
  ~
  $ hg --hidden -R ../public shortlog -G -r 1::
  o  3:dd15  public  fix bug 15 (v2)
  |
  o  2:9d21  public  implement feature X (v3)
  |
  o  1:7b49  public  fix bug 37
  |
  ~
  $ cd ..

Setup for shared mutable history (to illustrate content-divergence and
phase-divergent changesets).

  $ rm -rf review alice bob
  $ hg clone public alice
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg clone public bob
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat >> alice/.hg/hgrc <<EOF
  > [phases]
  > publish = false
  > EOF
  $ cp alice/.hg/hgrc bob/.hg/hgrc

Now we'll have Bob commit a bug fix that could still be improved::

  $ cd bob
  $ echo 'pretty good fix' >> file1
  $ hg commit -u bob -m 'fix bug 24 (v1)'
  $ hg shortlog -r .
  4:b2be  draft  fix bug 24 (v1)

Alice pulls Bob's draft changeset and amends it herself. ::

  $ cd ../alice
  $ hg pull -u ../bob
  pulling from ../bob
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets b2be254b3b9f (1 drafts)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 'better fix (alice)' >> file1
  $ hg amend -u alice -m 'fix bug 24 (v2 by alice)'

Bob implements a better fix of his own::

  $ cd ../bob
  $ echo 'better fix (bob)' >> file1
  $ hg amend -u bob -m 'fix bug 24 (v2 by bob)'
  $ hg --hidden shortlog -G -r 3::
  @  5:541f  draft  fix bug 24 (v2 by bob)
  |
  | x  4:b2be  draft  fix bug 24 (v1)
  |/
  o  3:dd15  public  fix bug 15 (v2)
  |
  ~

Bob discovers the divergence.
  $ hg pull ../alice
  pulling from ../alice
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  2 new content-divergent changesets
  new changesets e3a586fd2377 (1 drafts)
  (run 'hg heads' to see heads, 'hg merge' to merge)

Figure SG09: multiple heads! divergence! oh my!
  $ hg --hidden shortlog -G -r 3::
  *  6:e3a5  draft  fix bug 24 (v2 by alice)
  |
  | @  5:541f  draft  fix bug 24 (v2 by bob)
  |/
  | x  4:b2be  draft  fix bug 24 (v1)
  |/
  o  3:dd15  public  fix bug 15 (v2)
  |
  ~
  $ hg --hidden shortlog -r 'successors(b2be)'
  5:541f  draft  fix bug 24 (v2 by bob)
  6:e3a5  draft  fix bug 24 (v2 by alice)

Use evolve to fix the divergence.
  $ cat > editor.sh <<EOF
  > #!/bin/sh
  > cat > \$1 <<ENDOF
  > fix bug 24 (v2 by bob)
  > ENDOF
  > EOF

  $ HGEDITOR='sh ./editor.sh' HGMERGE=internal:other hg evolve --content-divergent
  merge:[5] fix bug 24 (v2 by bob)
  with: [6] fix bug 24 (v2 by alice)
  base: [4] fix bug 24 (v1)
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  working directory is now at f92394e17e33
  $ hg log -q -r 'contentdivergent()'

Figure SG10: Bob's repository after fixing divergence.
  $ hg --hidden shortlog -G -r 3::
  @  7:f923  draft  fix bug 24 (v2 by bob)
  |
  | x  6:e3a5  draft  fix bug 24 (v2 by alice)
  |/
  | x  5:541f  draft  fix bug 24 (v2 by bob)
  |/
  | x  4:b2be  draft  fix bug 24 (v1)
  |/
  o  3:dd15  public  fix bug 15 (v2)
  |
  ~
  $ hg --hidden shortlog -r 'predecessors(.)'
  5:541f  draft  fix bug 24 (v2 by bob)
  6:e3a5  draft  fix bug 24 (v2 by alice)
  $ cat file1
  Do stuff.
  pretty good fix
  better fix (alice)