view tests/test-histedit-fold.t @ 37048:fc5e261915b9

wireproto: require POST for all HTTPv2 requests

Wire protocol version 1 transfers argument data via request
headers by default. This has historically caused problems because
servers institute limits on the length of individual HTTP headers
as well as the total size of all request headers. Mercurial servers
can advertise the maximum length of an individual header. But
there's no guarantee any intermediate HTTP agents will accept
headers up to that length.

In the existing wire protocol, server operators typically also
key off the HTTP request method to implement authentication.
For example, GET requests translate to read-only requests and
can be allowed. But read-write commands must use POST and require
authentication. This has typically worked because the only wire
protocol commands that use POST modify the repo (e.g. the
"unbundle" command).

There is an experimental feature to enable clients to transmit
argument data via POST request bodies. This is technically a
better and more robust solution. But we can't enable it by default
because of servers assuming POST means write access.

In version 2 of the wire protocol, the permissions of a request
are encoded in the URL. And with it being a new protocol in a new
URL space, we're not constrained by backwards compatibility
requirements.

This commit adopts the technically superior mechanism of using
HTTP request bodies to send argument data by requiring POST for
all commands. Strictly speaking, it may be possible to send
request bodies on GET requests. But my experience is that not all
HTTP stacks support this. POST pretty much always works. Using POST
for read-only operations does sacrifice some RESTful design
purity. But this API cares about practicality, not about being
in Roy T. Fielding's REST ivory tower.

There's a chance we may relax this restriction in the future. But
for now, I want to see how far we can get with a POST only API.

Differential Revision: https://phab.mercurial-scm.org/D2837

Test histedit extension: Fold commands
======================================

This test file is dedicated to testing the fold command in non conflicting
case.

Initialization
---------------


  $ . "$TESTDIR/histedit-helpers.sh"

  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > logt = log --template '{rev}:{node|short} {desc|firstline}\n'
  > [extensions]
  > histedit=
  > EOF


Simple folding
--------------------
  $ addwithdate ()
  > {
  >     echo $1 > $1
  >     hg add $1
  >     hg ci -m $1 -d "$2 0"
  > }

  $ initrepo ()
  > {
  >     hg init r
  >     cd r
  >     addwithdate a 1
  >     addwithdate b 2
  >     addwithdate c 3
  >     addwithdate d 4
  >     addwithdate e 5
  >     addwithdate f 6
  > }

  $ initrepo

log before edit
  $ hg logt --graph
  @  5:178e35e0ce73 f
  |
  o  4:1ddb6c90f2ee e
  |
  o  3:532247a8969b d
  |
  o  2:ff2c9fa2018b c
  |
  o  1:97d72e5f12c7 b
  |
  o  0:8580ff50825a a
  

  $ hg histedit ff2c9fa2018b --commands - 2>&1 <<EOF | fixbundle
  > pick 1ddb6c90f2ee e
  > pick 178e35e0ce73 f
  > fold ff2c9fa2018b c
  > pick 532247a8969b d
  > EOF

log after edit
  $ hg logt --graph
  @  4:c4d7f3def76d d
  |
  o  3:575228819b7e f
  |
  o  2:505a591af19e e
  |
  o  1:97d72e5f12c7 b
  |
  o  0:8580ff50825a a
  

post-fold manifest
  $ hg manifest
  a
  b
  c
  d
  e
  f


check histedit_source, including that it uses the later date, from the first changeset

  $ hg log --debug --rev 3
  changeset:   3:575228819b7e6ed69e8c0a6a383ee59a80db7358
  phase:       draft
  parent:      2:505a591af19eed18f560af827b9e03d2076773dc
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    3:81eede616954057198ead0b2c73b41d1f392829a
  user:        test
  date:        Thu Jan 01 00:00:06 1970 +0000
  files+:      c f
  extra:       branch=default
  extra:       histedit_source=7cad1d7030207872dfd1c3a7cb430f24f2884086,ff2c9fa2018b15fa74b33363bda9527323e2a99f
  description:
  f
  ***
  c
  
  

rollup will fold without preserving the folded commit's message or date

  $ OLDHGEDITOR=$HGEDITOR
  $ HGEDITOR=false
  $ hg histedit 97d72e5f12c7 --commands - 2>&1 <<EOF | fixbundle
  > pick 97d72e5f12c7 b
  > roll 505a591af19e e
  > pick 575228819b7e f
  > pick c4d7f3def76d d
  > EOF

  $ HGEDITOR=$OLDHGEDITOR

log after edit
  $ hg logt --graph
  @  3:bab801520cec d
  |
  o  2:58c8f2bfc151 f
  |
  o  1:5d939c56c72e b
  |
  o  0:8580ff50825a a
  

description is taken from rollup target commit

  $ hg log --debug --rev 1
  changeset:   1:5d939c56c72e77e29f5167696218e2131a40f5cf
  phase:       draft
  parent:      0:8580ff50825a50c8f716709acdf8de0deddcd6ab
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    1:b5e112a3a8354e269b1524729f0918662d847c38
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  files+:      b e
  extra:       branch=default
  extra:       histedit_source=97d72e5f12c7e84f85064aa72e5a297142c36ed9,505a591af19eed18f560af827b9e03d2076773dc
  description:
  b
  
  

check saving last-message.txt

  $ cat > $TESTTMP/abortfolding.py <<EOF
  > from mercurial import util
  > def abortfolding(ui, repo, hooktype, **kwargs):
  >     ctx = repo[kwargs.get('node')]
  >     if set(ctx.files()) == {b'c', b'd', b'f'}:
  >         return True # abort folding commit only
  >     ui.warn(b'allow non-folding commit\\n')
  > EOF
  $ cat > .hg/hgrc <<EOF
  > [hooks]
  > pretxncommit.abortfolding = python:$TESTTMP/abortfolding.py:abortfolding
  > EOF

  $ cat > $TESTTMP/editor.sh << EOF
  > echo "==== before editing"
  > cat \$1
  > echo "===="
  > echo "check saving last-message.txt" >> \$1
  > EOF

  $ rm -f .hg/last-message.txt
  $ hg status --rev '58c8f2bfc151^1::bab801520cec'
  A c
  A d
  A f
  $ HGEDITOR="sh $TESTTMP/editor.sh" hg histedit 58c8f2bfc151 --commands - 2>&1 <<EOF
  > pick 58c8f2bfc151 f
  > fold bab801520cec d
  > EOF
  allow non-folding commit
  ==== before editing
  f
  ***
  c
  ***
  d
  
  
  
  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  HG: Leave message empty to abort commit.
  HG: --
  HG: user: test
  HG: branch 'default'
  HG: added c
  HG: added d
  HG: added f
  ====
  transaction abort!
  rollback completed
  abort: pretxncommit.abortfolding hook failed
  [255]

  $ cat .hg/last-message.txt
  f
  ***
  c
  ***
  d
  
  
  
  check saving last-message.txt

  $ cd ..
  $ rm -r r

folding preserves initial author but uses later date
----------------------------------------------------

  $ initrepo

  $ hg ci -d '7 0' --user "someone else" --amend --quiet

tip before edit
  $ hg log --rev .
  changeset:   5:10c36dd37515
  tag:         tip
  user:        someone else
  date:        Thu Jan 01 00:00:07 1970 +0000
  summary:     f
  

  $ hg --config progress.debug=1 --debug \
  > histedit 1ddb6c90f2ee --commands - 2>&1 <<EOF | \
  > egrep 'editing|unresolved'
  > pick 1ddb6c90f2ee e
  > fold 10c36dd37515 f
  > EOF
  editing: pick 1ddb6c90f2ee 4 e 1/2 changes (50.00%)
  editing: fold 10c36dd37515 5 f 2/2 changes (100.00%)

tip after edit, which should use the later date, from the second changeset
  $ hg log --rev .
  changeset:   4:e4f3ec5d0b40
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:07 1970 +0000
  summary:     e
  

  $ cd ..
  $ rm -r r

folding and creating no new change doesn't break:
-------------------------------------------------

folded content is dropped during a merge. The folded commit should properly disappear.

  $ mkdir fold-to-empty-test
  $ cd fold-to-empty-test
  $ hg init
  $ printf "1\n2\n3\n" > file
  $ hg add file
  $ hg commit -m '1+2+3'
  $ echo 4 >> file
  $ hg commit -m '+4'
  $ echo 5 >> file
  $ hg commit -m '+5'
  $ echo 6 >> file
  $ hg commit -m '+6'
  $ hg logt --graph
  @  3:251d831eeec5 +6
  |
  o  2:888f9082bf99 +5
  |
  o  1:617f94f13c0f +4
  |
  o  0:0189ba417d34 1+2+3
  

  $ hg histedit 1 --commands - << EOF
  > pick 617f94f13c0f 1 +4
  > drop 888f9082bf99 2 +5
  > fold 251d831eeec5 3 +6
  > EOF
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  merging file
  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
  Fix up the change (fold 251d831eeec5)
  (hg histedit --continue to resume)
  [1]
There were conflicts, we keep P1 content. This
should effectively drop the changes from +6.

  $ hg status -v
  M file
  ? file.orig
  # The repository is in an unfinished *histedit* state.
  
  # Unresolved merge conflicts:
  # 
  #     file
  # 
  # To mark files as resolved:  hg resolve --mark FILE
  
  # To continue:                hg histedit --continue
  # To abort:                   hg histedit --abort
  
  $ hg resolve -l
  U file
  $ hg revert -r 'p1()' file
  $ hg resolve --mark file
  (no more unresolved files)
  continue: hg histedit --continue
  $ hg histedit --continue
  251d831eeec5: empty changeset
  saved backup bundle to $TESTTMP/fold-to-empty-test/.hg/strip-backup/888f9082bf99-daa0b8b3-histedit.hg
  $ hg logt --graph
  @  1:617f94f13c0f +4
  |
  o  0:0189ba417d34 1+2+3
  

  $ cd ..


Test fold through dropped
-------------------------


Test corner case where folded revision is separated from its parent by a
dropped revision.


  $ hg init fold-with-dropped
  $ cd fold-with-dropped
  $ printf "1\n2\n3\n" > file
  $ hg commit -Am '1+2+3'
  adding file
  $ echo 4 >> file
  $ hg commit -m '+4'
  $ echo 5 >> file
  $ hg commit -m '+5'
  $ echo 6 >> file
  $ hg commit -m '+6'
  $ hg logt -G
  @  3:251d831eeec5 +6
  |
  o  2:888f9082bf99 +5
  |
  o  1:617f94f13c0f +4
  |
  o  0:0189ba417d34 1+2+3
  
  $ hg histedit 1 --commands -  << EOF
  > pick 617f94f13c0f 1 +4
  > drop 888f9082bf99 2 +5
  > fold 251d831eeec5 3 +6
  > EOF
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  merging file
  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
  Fix up the change (fold 251d831eeec5)
  (hg histedit --continue to resume)
  [1]
  $ cat > file << EOF
  > 1
  > 2
  > 3
  > 4
  > 5
  > EOF
  $ hg resolve --mark file
  (no more unresolved files)
  continue: hg histedit --continue
  $ hg commit -m '+5.2'
  created new head
  $ echo 6 >> file
  $ HGEDITOR=cat hg histedit --continue
  +4
  ***
  +5.2
  ***
  +6
  
  
  
  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  HG: Leave message empty to abort commit.
  HG: --
  HG: user: test
  HG: branch 'default'
  HG: changed file
  saved backup bundle to $TESTTMP/fold-with-dropped/.hg/strip-backup/617f94f13c0f-3d69522c-histedit.hg
  $ hg logt -G
  @  1:10c647b2cdd5 +4
  |
  o  0:0189ba417d34 1+2+3
  
  $ hg export tip
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 10c647b2cdd54db0603ecb99b2ff5ce66d5a5323
  # Parent  0189ba417d34df9dda55f88b637dcae9917b5964
  +4
  ***
  +5.2
  ***
  +6
  
  diff -r 0189ba417d34 -r 10c647b2cdd5 file
  --- a/file	Thu Jan 01 00:00:00 1970 +0000
  +++ b/file	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,3 +1,6 @@
   1
   2
   3
  +4
  +5
  +6
  $ cd ..


Folding with initial rename (issue3729)
---------------------------------------

  $ hg init fold-rename
  $ cd fold-rename
  $ echo a > a.txt
  $ hg add a.txt
  $ hg commit -m a
  $ hg rename a.txt b.txt
  $ hg commit -m rename
  $ echo b >> b.txt
  $ hg commit -m b

  $ hg logt --follow b.txt
  2:e0371e0426bc b
  1:1c4f440a8085 rename
  0:6c795aa153cb a

  $ hg histedit 1c4f440a8085 --commands - 2>&1 << EOF | fixbundle
  > pick 1c4f440a8085 rename
  > fold e0371e0426bc b
  > EOF

  $ hg logt --follow b.txt
  1:cf858d235c76 rename
  0:6c795aa153cb a

  $ cd ..

Folding with swapping
---------------------

This is an excuse to test hook with histedit temporary commit (issue4422)


  $ hg init issue4422
  $ cd issue4422
  $ echo a > a.txt
  $ hg add a.txt
  $ hg commit -m a
  $ echo b > b.txt
  $ hg add b.txt
  $ hg commit -m b
  $ echo c > c.txt
  $ hg add c.txt
  $ hg commit -m c

  $ hg logt
  2:a1a953ffb4b0 c
  1:199b6bb90248 b
  0:6c795aa153cb a

Setup the proper environment variable symbol for the platform, to be subbed
into the hook command.
#if windows
  $ NODE="%HG_NODE%"
#else
  $ NODE="\$HG_NODE"
#endif
  $ hg histedit 6c795aa153cb --config hooks.commit="echo commit $NODE" --commands - 2>&1 << EOF | fixbundle
  > pick 199b6bb90248 b
  > fold a1a953ffb4b0 c
  > pick 6c795aa153cb a
  > EOF
  commit 9599899f62c05f4377548c32bf1c9f1a39634b0c

  $ hg logt
  1:9599899f62c0 a
  0:79b99e9c8e49 b

  $ echo "foo" > amended.txt
  $ hg add amended.txt
  $ hg ci -q --config extensions.largefiles= --amend -I amended.txt
  The fsmonitor extension is incompatible with the largefiles extension and has been disabled. (fsmonitor !)

Test that folding multiple changes in a row doesn't show multiple
editors.

  $ echo foo >> foo
  $ hg add foo
  $ hg ci -m foo1
  $ echo foo >> foo
  $ hg ci -m foo2
  $ echo foo >> foo
  $ hg ci -m foo3
  $ hg logt
  4:21679ff7675c foo3
  3:b7389cc4d66e foo2
  2:0e01aeef5fa8 foo1
  1:578c7455730c a
  0:79b99e9c8e49 b
  $ cat > "$TESTTMP/editor.sh" <<EOF
  > echo ran editor >> "$TESTTMP/editorlog.txt"
  > cat \$1 >> "$TESTTMP/editorlog.txt"
  > echo END >> "$TESTTMP/editorlog.txt"
  > echo merged foos > \$1
  > EOF
  $ HGEDITOR="sh \"$TESTTMP/editor.sh\"" hg histedit 1 --commands - 2>&1 <<EOF | fixbundle
  > pick 578c7455730c 1 a
  > pick 0e01aeef5fa8 2 foo1
  > fold b7389cc4d66e 3 foo2
  > fold 21679ff7675c 4 foo3
  > EOF
  $ hg logt
  2:e8bedbda72c1 merged foos
  1:578c7455730c a
  0:79b99e9c8e49 b
Editor should have run only once
  $ cat $TESTTMP/editorlog.txt
  ran editor
  foo1
  ***
  foo2
  ***
  foo3
  
  
  
  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  HG: Leave message empty to abort commit.
  HG: --
  HG: user: test
  HG: branch 'default'
  HG: added foo
  END

  $ cd ..

Test rolling into a commit with multiple children (issue5498)

  $ hg init roll
  $ cd roll
  $ echo a > a
  $ hg commit -qAm aa
  $ echo b > b
  $ hg commit -qAm bb
  $ hg up -q ".^"
  $ echo c > c
  $ hg commit -qAm cc
  $ hg log -G -T '{node|short} {desc}'
  @  5db65b93a12b cc
  |
  | o  301d76bdc3ae bb
  |/
  o  8f0162e483d0 aa
  

  $ hg histedit . --commands - << EOF
  > r 5db65b93a12b
  > EOF
  hg: parse error: first changeset cannot use verb "roll"
  [255]
  $ hg log -G -T '{node|short} {desc}'
  @  5db65b93a12b cc
  |
  | o  301d76bdc3ae bb
  |/
  o  8f0162e483d0 aa