tests/test-rebase-newancestor.t
author Gregory Szorc <gregory.szorc@gmail.com>
Sun, 11 Mar 2018 10:51:14 -0700
changeset 36895 a5c478843c82
parent 35393 4441705b7111
child 37330 db06c4bb2158
permissions -rw-r--r--
hgweb: construct static URL like hgweb does hgwebdir has a bit of code for constructing URLs. This reinvents wheels from our parsedrequest instance. And sometimes the behavior varies from what hgweb does. We'll want to converge that behavior. This commit changes hgwebdir so its staticurl template keyword is constructed the same way as hgweb's. There's probably room to factor this into a shared function. But let's solve the problem of divergence first. Differential Revision: https://phab.mercurial-scm.org/D2817

  $ cat >> $HGRCPATH <<EOF
  > [format]
  > usegeneraldelta=yes
  > [extensions]
  > rebase=
  > drawdag=$TESTDIR/drawdag.py
  > [alias]
  > tglog = log -G --template "{rev}: {node|short} '{desc}' {branches}\n"
  > EOF

  $ hg init repo
  $ cd repo

  $ echo A > a
  $ echo >> a
  $ hg ci -Am A
  adding a

  $ echo B > a
  $ echo >> a
  $ hg ci -m B

  $ echo C > a
  $ echo >> a
  $ hg ci -m C

  $ hg up -q -C 0

  $ echo D >> a
  $ hg ci -Am AD
  created new head

  $ hg tglog
  @  3: 3878212183bd 'AD'
  |
  | o  2: 30ae917c0e4f 'C'
  | |
  | o  1: 0f4f7cb4f549 'B'
  |/
  o  0: 1e635d440a73 'A'
  
  $ hg rebase -s 1 -d 3
  rebasing 1:0f4f7cb4f549 "B"
  merging a
  rebasing 2:30ae917c0e4f "C"
  merging a
  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/0f4f7cb4f549-82b3b163-rebase.hg

  $ hg tglog
  o  3: 25773bc4b4b0 'C'
  |
  o  2: c09015405f75 'B'
  |
  @  1: 3878212183bd 'AD'
  |
  o  0: 1e635d440a73 'A'
  

  $ cd ..


Test rebasing of merges with ancestors of the rebase destination - a situation
that often happens when trying to recover from repeated merging with a mainline
branch.

The test case creates a dev branch that contains a couple of merges from the
default branch. When rebasing to the default branch, these merges would be
merges with ancestors on the same branch. The merges _could_ contain some
interesting conflict resolutions or additional changes in the merge commit, but
that is mixed up with the actual merge stuff and there is in general no way to
separate them.

Note: The dev branch contains _no_ changes to f-default. It might be unclear
how rebasing of ancestor merges should be handled, but the current behavior
with spurious prompts for conflicts in files that didn't change seems very
wrong.

  $ hg init ancestor-merge
  $ cd ancestor-merge

  $ touch f-default
  $ hg ci -Aqm 'default: create f-default'

  $ hg branch -q dev
  $ hg ci -qm 'dev: create branch'

  $ echo stuff > f-dev
  $ hg ci -Aqm 'dev: f-dev stuff'

  $ hg up -q default
  $ echo stuff > f-default
  $ hg ci -m 'default: f-default stuff'

  $ hg up -q dev
  $ hg merge -q default
  $ hg ci -m 'dev: merge default'

  $ hg up -q default
  $ hg rm f-default
  $ hg ci -m 'default: remove f-default'

  $ hg up -q dev
  $ hg merge -q default
  $ hg ci -m 'dev: merge default'

  $ hg up -q default
  $ echo stuff > f-other
  $ hg ci -Aqm 'default: f-other stuff'

  $ hg tglog
  @  7: e08089805d82 'default: f-other stuff'
  |
  | o  6: 9455ee510502 'dev: merge default' dev
  |/|
  o |  5: 462860db70a1 'default: remove f-default'
  | |
  | o  4: 4b019212aaf6 'dev: merge default' dev
  |/|
  o |  3: f157ecfd2b6b 'default: f-default stuff'
  | |
  | o  2: ec2c14fb2984 'dev: f-dev stuff' dev
  | |
  | o  1: 1d1a643d390e 'dev: create branch' dev
  |/
  o  0: e90e8eb90b6f 'default: create f-default'
  
  $ hg clone -qU . ../ancestor-merge-2

Full rebase all the way back from branching point:

  $ hg rebase -r 'only(dev,default)' -d default --config ui.interactive=True << EOF
  > c
  > EOF
  rebasing 1:1d1a643d390e "dev: create branch"
  note: rebase of 1:1d1a643d390e created no changes to commit
  rebasing 2:ec2c14fb2984 "dev: f-dev stuff"
  rebasing 4:4b019212aaf6 "dev: merge default"
  other [source] changed f-default which local [dest] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? c
  rebasing 6:9455ee510502 "dev: merge default"
  saved backup bundle to $TESTTMP/ancestor-merge/.hg/strip-backup/1d1a643d390e-43e9e04b-rebase.hg
  $ hg tglog
  o  6: fbc098e72227 'dev: merge default'
  |
  o  5: eda7b7f46f5d 'dev: merge default'
  |
  o  4: 3e075b1c0a40 'dev: f-dev stuff'
  |
  @  3: e08089805d82 'default: f-other stuff'
  |
  o  2: 462860db70a1 'default: remove f-default'
  |
  o  1: f157ecfd2b6b 'default: f-default stuff'
  |
  o  0: e90e8eb90b6f 'default: create f-default'
  
Grafty cherry picking rebasing:

  $ cd ../ancestor-merge-2

  $ hg phase -fdr0:
  $ hg rebase -r 'children(only(dev,default))' -d default --config ui.interactive=True << EOF
  > c
  > EOF
  rebasing 2:ec2c14fb2984 "dev: f-dev stuff"
  rebasing 4:4b019212aaf6 "dev: merge default"
  other [source] changed f-default which local [dest] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? c
  rebasing 6:9455ee510502 "dev: merge default"
  saved backup bundle to $TESTTMP/ancestor-merge-2/.hg/strip-backup/ec2c14fb2984-62d0b222-rebase.hg
  $ hg tglog
  o  7: fbc098e72227 'dev: merge default'
  |
  o  6: eda7b7f46f5d 'dev: merge default'
  |
  o  5: 3e075b1c0a40 'dev: f-dev stuff'
  |
  o  4: e08089805d82 'default: f-other stuff'
  |
  o  3: 462860db70a1 'default: remove f-default'
  |
  o  2: f157ecfd2b6b 'default: f-default stuff'
  |
  | o  1: 1d1a643d390e 'dev: create branch' dev
  |/
  o  0: e90e8eb90b6f 'default: create f-default'
  
  $ cd ..


Test order of parents of rebased merged with un-rebased changes as p1.

  $ hg init parentorder
  $ cd parentorder
  $ touch f
  $ hg ci -Aqm common
  $ touch change
  $ hg ci -Aqm change
  $ touch target
  $ hg ci -Aqm target
  $ hg up -qr 0
  $ touch outside
  $ hg ci -Aqm outside
  $ hg merge -qr 1
  $ hg ci -m 'merge p1 3=outside p2 1=ancestor'
  $ hg par
  changeset:   4:6990226659be
  tag:         tip
  parent:      3:f59da8fc0fcf
  parent:      1:dd40c13f7a6f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     merge p1 3=outside p2 1=ancestor
  
  $ hg up -qr 1
  $ hg merge -qr 3
  $ hg ci -qm 'merge p1 1=ancestor p2 3=outside'
  $ hg par
  changeset:   5:a57575f79074
  tag:         tip
  parent:      1:dd40c13f7a6f
  parent:      3:f59da8fc0fcf
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     merge p1 1=ancestor p2 3=outside
  
  $ hg tglog
  @    5: a57575f79074 'merge p1 1=ancestor p2 3=outside'
  |\
  +---o  4: 6990226659be 'merge p1 3=outside p2 1=ancestor'
  | |/
  | o  3: f59da8fc0fcf 'outside'
  | |
  +---o  2: a60552eb93fb 'target'
  | |
  o |  1: dd40c13f7a6f 'change'
  |/
  o  0: 02f0f58d5300 'common'
  
  $ hg rebase -r 4 -d 2
  rebasing 4:6990226659be "merge p1 3=outside p2 1=ancestor"
  saved backup bundle to $TESTTMP/parentorder/.hg/strip-backup/6990226659be-4d67a0d3-rebase.hg
  $ hg tip
  changeset:   5:cca50676b1c5
  tag:         tip
  parent:      2:a60552eb93fb
  parent:      3:f59da8fc0fcf
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     merge p1 3=outside p2 1=ancestor
  
  $ hg rebase -r 4 -d 2
  rebasing 4:a57575f79074 "merge p1 1=ancestor p2 3=outside"
  saved backup bundle to $TESTTMP/parentorder/.hg/strip-backup/a57575f79074-385426e5-rebase.hg
  $ hg tip
  changeset:   5:f9daf77ffe76
  tag:         tip
  parent:      2:a60552eb93fb
  parent:      3:f59da8fc0fcf
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     merge p1 1=ancestor p2 3=outside
  
  $ hg tglog
  @    5: f9daf77ffe76 'merge p1 1=ancestor p2 3=outside'
  |\
  +---o  4: cca50676b1c5 'merge p1 3=outside p2 1=ancestor'
  | |/
  | o  3: f59da8fc0fcf 'outside'
  | |
  o |  2: a60552eb93fb 'target'
  | |
  o |  1: dd40c13f7a6f 'change'
  |/
  o  0: 02f0f58d5300 'common'
  
rebase of merge of ancestors

  $ hg up -qr 2
  $ hg merge -qr 3
  $ echo 'other change while merging future "rebase ancestors"' > other
  $ hg ci -Aqm 'merge rebase ancestors'
  $ hg rebase -d 5 -v
  rebasing 6:4c5f12f25ebe "merge rebase ancestors" (tip)
  resolving manifests
  removing other
  note: merging f9daf77ffe76+ and 4c5f12f25ebe using bids from ancestors a60552eb93fb and f59da8fc0fcf
  
  calculating bids for ancestor a60552eb93fb
  resolving manifests
  
  calculating bids for ancestor f59da8fc0fcf
  resolving manifests
  
  auction for merging merge bids
   other: consensus for g
  end of auction
  
  getting other
  committing files:
  other
  committing manifest
  committing changelog
  rebase merging completed
  1 changesets found
  uncompressed size of bundle content:
       199 (changelog)
       216 (manifests)
       182  other
  saved backup bundle to $TESTTMP/parentorder/.hg/strip-backup/4c5f12f25ebe-f46990e5-rebase.hg
  1 changesets found
  uncompressed size of bundle content:
       254 (changelog)
       167 (manifests)
       182  other
  adding branch
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  rebase completed
  $ hg tglog
  @  6: 113755df812b 'merge rebase ancestors'
  |
  o    5: f9daf77ffe76 'merge p1 1=ancestor p2 3=outside'
  |\
  +---o  4: cca50676b1c5 'merge p1 3=outside p2 1=ancestor'
  | |/
  | o  3: f59da8fc0fcf 'outside'
  | |
  o |  2: a60552eb93fb 'target'
  | |
  o |  1: dd40c13f7a6f 'change'
  |/
  o  0: 02f0f58d5300 'common'
  
Due to the limitation of 3-way merge algorithm (1 merge base), rebasing a merge
may include unwanted content:

  $ hg init $TESTTMP/dual-merge-base1
  $ cd $TESTTMP/dual-merge-base1
  $ hg debugdrawdag <<'EOS'
  >   F
  >  /|
  > D E
  > | |
  > B C
  > |/
  > A Z
  > |/
  > R
  > EOS
  $ hg rebase -r D+E+F -d Z
  rebasing 5:5f2c926dfecf "D" (D)
  rebasing 6:b296604d9846 "E" (E)
  rebasing 7:caa9781e507d "F" (F tip)
  abort: rebasing 7:caa9781e507d will include unwanted changes from 4:d6003a550c2c or 3:c1e6b162678d
  [255]

The warning does not get printed if there is no unwanted change detected:

  $ hg init $TESTTMP/dual-merge-base2
  $ cd $TESTTMP/dual-merge-base2
  $ hg debugdrawdag <<'EOS'
  >   D
  >  /|
  > B C
  > |/
  > A Z
  > |/
  > R
  > EOS
  $ hg rebase -r B+C+D -d Z
  rebasing 3:c1e6b162678d "B" (B)
  rebasing 4:d6003a550c2c "C" (C)
  rebasing 5:c8f78076273e "D" (D tip)
  saved backup bundle to $TESTTMP/dual-merge-base2/.hg/strip-backup/d6003a550c2c-6f1424b6-rebase.hg
  $ hg manifest -r 'desc(D)'
  B
  C
  R
  Z

The merge base could be different from old p1 (changed parent becomes new p1):

  $ hg init $TESTTMP/chosen-merge-base1
  $ cd $TESTTMP/chosen-merge-base1
  $ hg debugdrawdag <<'EOS'
  >   F
  >  /|
  > D E
  > | |
  > B C Z
  > EOS
  $ hg rebase -r D+F -d Z
  rebasing 3:004dc1679908 "D" (D)
  rebasing 5:4be4cbf6f206 "F" (F tip)
  saved backup bundle to $TESTTMP/chosen-merge-base1/.hg/strip-backup/004dc1679908-06a66a3c-rebase.hg
  $ hg manifest -r 'desc(F)'
  C
  D
  E
  Z
  $ hg log -r `hg log -r 'desc(F)' -T '{p1node}'` -T '{desc}\n'
  D

  $ hg init $TESTTMP/chosen-merge-base2
  $ cd $TESTTMP/chosen-merge-base2
  $ hg debugdrawdag <<'EOS'
  >   F
  >  /|
  > D E
  > | |
  > B C Z
  > EOS
  $ hg rebase -r E+F -d Z
  rebasing 4:974e4943c210 "E" (E)
  rebasing 5:4be4cbf6f206 "F" (F tip)
  saved backup bundle to $TESTTMP/chosen-merge-base2/.hg/strip-backup/974e4943c210-b2874da5-rebase.hg
  $ hg manifest -r 'desc(F)'
  B
  D
  E
  Z
  $ hg log -r `hg log -r 'desc(F)' -T '{p1node}'` -T '{desc}\n'
  E