$ . helpers-usechg.sh

Set up test environment.

  $ enable amend rebase
  $ setconfig experimental.evolution.allowdivergence=True
  $ setconfig experimental.evolution="createmarkers, allowunstable"
  $ mkcommit() {
  >   echo "$1" > "$1"
  >   hg add "$1"
  >   hg ci -m "add $1"
  > }
  $ hg init restack && cd restack

Note: Repositories populated by `hg debugbuilddag` don't seem to
correctly show all commits in the log output. Manually creating the
commits results in the expected behavior, so commits are manually
created in the test cases below.

Test unsupported flags:
  $ hg rebase --restack --rev .
  abort: cannot use both --rev and --restack
  [255]
  $ hg rebase --restack --source .
  abort: cannot use both --source and --restack
  [255]
  $ hg rebase --restack --base .
  abort: cannot use both --base and --restack
  [255]
  $ hg rebase --restack --abort
  abort: cannot use both --abort and --restack
  [255]
  $ hg rebase --restack --continue
  abort: cannot use both --continue and --restack
  [255]
  $ hg rebase --restack --hidden
  abort: cannot use both --hidden and --restack
  [255]

Test basic case of a single amend in a small stack.
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ showgraph
  @  4 c54ee8acf83d add b
  |
  | o  3 47d2a3944de8 add d
  | |
  | o  2 4538525df7e2 add c
  | |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  rebasing 3:47d2a3944de8 "add d"
  $ showgraph
  o  6 a5821d37b1b7 add d
  |
  o  5 1764a93dcfdf add c
  |
  @  4 c54ee8acf83d add b
  |
  o  0 1f0dee641bb7 add a

Test multiple amends of same commit.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ hg up 1
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ showgraph
  o  2 4538525df7e2 add c
  |
  @  1 7c3bad9141dc add b
  |
  o  0 1f0dee641bb7 add a

  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ echo b >> b
  $ hg amend
  $ showgraph
  @  4 c4c2e155d8e8 add b
  |
  | o  2 4538525df7e2 add c
  | |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  $ showgraph
  o  5 81909827477c add c
  |
  @  4 c4c2e155d8e8 add b
  |
  o  0 1f0dee641bb7 add a

Test conflict during rebasing.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ mkcommit e
  $ hg up 1
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ echo conflict > d
  $ hg add d
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ showgraph
  @  5 f19e51f4d5ab add b
  |
  | o  4 9d206ffc875e add e
  | |
  | o  3 47d2a3944de8 add d
  | |
  | o  2 4538525df7e2 add c
  | |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  rebasing 3:47d2a3944de8 "add d"
  merging d
  warning: 1 conflicts while merging d! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see hg resolve, then hg rebase --continue)
  [1]
  $ hg rebase --restack
  abort: rebase in progress
  (use 'hg rebase --continue' or 'hg rebase --abort')
  [255]
  $ echo merged > d
  $ hg resolve --mark d
  (no more unresolved files)
  continue: hg rebase --continue
  $ hg rebase --continue
  already rebased 2:4538525df7e2 "add c" as 5532778357fd
  rebasing 3:47d2a3944de8 "add d"
  rebasing 4:9d206ffc875e "add e"
  $ showgraph
  o  8 661cf3d06b05 add e
  |
  o  7 fa39a0ff8b82 add d
  |
  o  6 5532778357fd add c
  |
  @  5 f19e51f4d5ab add b
  |
  o  0 1f0dee641bb7 add a

Test finding a stable base commit from within the old stack.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 3
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  4 c54ee8acf83d add b
  |
  | @  3 47d2a3944de8 add d
  | |
  | o  2 4538525df7e2 add c
  | |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  rebasing 3:47d2a3944de8 "add d"
  $ showgraph
  @  6 a5821d37b1b7 add d
  |
  o  5 1764a93dcfdf add c
  |
  o  4 c54ee8acf83d add b
  |
  o  0 1f0dee641bb7 add a

Test finding a stable base commit from a new child of the amended commit.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ mkcommit e
  $ showgraph
  @  5 c1992d8998fa add e
  |
  o  4 c54ee8acf83d add b
  |
  | o  3 47d2a3944de8 add d
  | |
  | o  2 4538525df7e2 add c
  | |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  rebasing 3:47d2a3944de8 "add d"
  $ showgraph
  o  7 a5821d37b1b7 add d
  |
  o  6 1764a93dcfdf add c
  |
  | @  5 c1992d8998fa add e
  |/
  o  4 c54ee8acf83d add b
  |
  o  0 1f0dee641bb7 add a

Test finding a stable base commit when there are multiple amends and
a commit on top of one of the obsolete intermediate commits.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ mkcommit e
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [*] add b (glob)
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of c54ee8acf83d are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 5
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  6 c4c2e155d8e8 add b
  |
  | @  5 c1992d8998fa add e
  | |
  | x  4 c54ee8acf83d add b
  |/
  | o  3 47d2a3944de8 add d
  | |
  | o  2 4538525df7e2 add c
  | |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  rebasing 3:47d2a3944de8 "add d"
  rebasing 5:c1992d8998fa "add e"
  $ showgraph
  @  9 d52a0251f17f add e
  |
  | o  8 98270af1e2d8 add d
  | |
  | o  7 81909827477c add c
  |/
  o  6 c4c2e155d8e8 add b
  |
  o  0 1f0dee641bb7 add a

Test that we start from the bottom of the stack. (Previously, restack would
only repair the unstable children closest to the current changeset. This
behavior is now incorrect -- restack should always fix the whole stack.)
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 2
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo c >> c
  $ hg amend
  hint[amend-restack]: descendants of 4538525df7e2 are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 3
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  5 a43fcd08f41f add c
  |
  | o  4 c54ee8acf83d add b
  | |
  | | @  3 47d2a3944de8 add d
  | | |
  +---x  2 4538525df7e2 add c
  | |
  x |  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 5:a43fcd08f41f "add c" (tip)
  rebasing 3:47d2a3944de8 "add d"
  $ showgraph
  @  7 eb17ba71882a add d
  |
  o  6 036064f96b60 add c
  |
  o  4 c54ee8acf83d add b
  |
  o  0 1f0dee641bb7 add a

Test what happens if there is no base commit found. The command should
fix up everything above the current commit, leaving other commits
below the current commit alone.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ mkcommit e
  $ hg up 3
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo d >> d
  $ hg amend
  hint[amend-restack]: descendants of 47d2a3944de8 are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 0
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ mkcommit f
  $ hg up 1
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ showgraph
  o  6 79bfbab36011 add f
  |
  | o  5 c5b31a43cdc5 add d
  | |
  | | o  4 9d206ffc875e add e
  | | |
  | | x  3 47d2a3944de8 add d
  | |/
  | o  2 4538525df7e2 add c
  | |
  | @  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 4:9d206ffc875e "add e"
  $ showgraph
  o  7 2f4697538c37 add e
  |
  | o  6 79bfbab36011 add f
  | |
  o |  5 c5b31a43cdc5 add d
  | |
  o |  2 4538525df7e2 add c
  | |
  @ |  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a

Test having an unamended commit.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [*] add b (glob)
  $ echo b >> b
  $ hg amend -m "Amended"
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ echo b >> b
  $ hg amend -m "Unamended"
  $ hg unamend
  $ hg up -C 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  3 a5c6a6c11eb6 Amended
  |
  | o  2 4538525df7e2 add c
  | |
  | @  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 2:4538525df7e2 "add c"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  5 34b2b8ed2689 add c
  |
  @  3 a5c6a6c11eb6 Amended
  |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a

Revision 2 "add c" is already stable (not orphaned) so restack does nothing:

  $ hg rebase --restack
  nothing to rebase - empty destination

Test recursive restacking -- basic case.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 2
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo c >> c
  $ hg amend
  hint[amend-restack]: descendants of 4538525df7e2 are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 1
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ showgraph
  o  5 a43fcd08f41f add c
  |
  | o  4 c54ee8acf83d add b
  | |
  | | o  3 47d2a3944de8 add d
  | | |
  +---x  2 4538525df7e2 add c
  | |
  @ |  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 5:a43fcd08f41f "add c" (tip)
  rebasing 3:47d2a3944de8 "add d"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  7 eb17ba71882a add d
  |
  o  6 036064f96b60 add c
  |
  @  4 c54ee8acf83d add b
  |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a

Test recursive restacking -- more complex case. This test is designed to
to check for a bug encountered if rebasing is performed naively from the
bottom-up wherein obsolescence information for commits further up the
stack is lost upon rebasing lower levels.
  $ newrepo
  $ mkcommit a
  $ mkcommit b
  $ mkcommit c
  $ mkcommit d
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo b >> b
  $ hg amend
  hint[amend-restack]: descendants of 7c3bad9141dc are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ mkcommit e
  $ mkcommit f
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [*] add e (glob)
  $ echo e >> e
  $ hg amend
  hint[amend-restack]: descendants of c1992d8998fa are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 2
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo c >> c
  $ hg amend
  hint[amend-restack]: descendants of 4538525df7e2 are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ mkcommit g
  $ mkcommit h
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [*] add g (glob)
  $ echo g >> g
  $ hg amend
  hint[amend-restack]: descendants of 0261378a5dc1 are left behind - use 'hg restack' to rebase them
  hint[hint-ack]: use 'hg hint --ack amend-restack' to silence these hints
  $ hg up 1
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ showgraph
  o  11 604f34a1983d add g
  |
  | o  10 9f2a7cefd4b4 add h
  | |
  | x  9 0261378a5dc1 add g
  |/
  o  8 a43fcd08f41f add c
  |
  | o  7 581ab389e415 add e
  | |
  | | o  6 2a79e3a98cd6 add f
  | | |
  | | x  5 c1992d8998fa add e
  | |/
  | o  4 c54ee8acf83d add b
  | |
  | | o  3 47d2a3944de8 add d
  | | |
  +---x  2 4538525df7e2 add c
  | |
  @ |  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a
  $ hg rebase --restack
  rebasing 6:2a79e3a98cd6 "add f"
  rebasing 8:a43fcd08f41f "add c"
  rebasing 11:604f34a1983d "add g" (tip)
  rebasing 3:47d2a3944de8 "add d"
  rebasing 10:9f2a7cefd4b4 "add h"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ showgraph
  o  16 02e6213e1c27 add h
  |
  | o  15 eb17ba71882a add d
  | |
  o |  14 cc14f12b1775 add g
  |/
  o  13 036064f96b60 add c
  |
  | o  12 d27ae4ec354c add f
  | |
  | o  7 581ab389e415 add e
  |/
  @  4 c54ee8acf83d add b
  |
  | x  1 7c3bad9141dc add b
  |/
  o  0 1f0dee641bb7 add a