view tests/test-histedit-edit.t @ 24545:9e0c67e84896

json: implement {tags} template

Tags is pretty easy to implement. Let's start there.

The output is slightly different from `hg tags -Tjson`. For reference,
the CLI has the following output:

  [
   {
    "node": "e2049974f9a23176c2addb61d8f5b86e0d620490",
    "rev": 29880,
    "tag": "tip",
    "type": ""
   },
   ...
  ]

Our output has the format:

  {
    "node": "0aeb19ea57a6d223bacddda3871cb78f24b06510",
    "tags": [
      {
        "node": "e2049974f9a23176c2addb61d8f5b86e0d620490",
        "tag": "tag1",
        "date": [1427775457.0, 25200]
      },
      ...
    ]
  }

"rev" is omitted because it isn't a reliable identifier. We shouldn't
be exposing them in web APIs and giving the impression it remotely
resembles a stable identifier. Perhaps we could one day hide this behind
a config option (it might be useful to expose when running servers
locally).

The "type" of the tag isn't defined because this information isn't yet
exposed to the hgweb templater (it could be in a follow-up) and because
it is questionable whether different types should be exposed at all.
(Should the web interface really be exposing "local" tags?)

We use an object for the outer type instead of Array for a few reasons.
First, it is extensible. If we ever need to throw more global properties
into the output, we can do that without breaking backwards compatibility
(property additions should be backwards compatible). Second, uniformity
in web APIs is nice. Having everything return objects seems much saner than
a mix of array and object. Third, there are security issues with arrays
in older browsers. The JSON web services world almost never uses arrays
as the main type for this reason.

Another possibly controversial part about this patch is how dates are
defined. While JSON has a Date type, it is based on the JavaScript Date
type, which is widely considered a pile of garbage. It is a non-starter
for this reason.

Many of Mercurial's built-in date filters drop seconds resolution. So
that's a non-starter as well, since we want the API to be lossless where
possible. rfc3339date, rfc822date, isodatesec, and date are all lossless.
However, they each require the client to perform string parsing on top of
JSON decoding. While date parsing libraries are pretty ubiquitous, some
languages don't have them out of the box. However, pretty much every
programming language can deal with UNIX timestamps (which are just
integers or floats). So, we choose to use Mercurial's internal date
representation, which in JSON is modeled as float seconds since UNIX
epoch and an integer timezone offset from UTC (keep in mind
JavaScript/JSON models all "Numbers" as double prevision floating point
numbers, so there isn't a difference between ints and floats in JSON).

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

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > histedit=
  > strip=
  > EOF

  $ initrepo ()
  > {
  >     hg init r
  >     cd r
  >     for x in a b c d e f g; do
  >         echo $x > $x
  >         hg add $x
  >         hg ci -m $x
  >     done
  > }

  $ initrepo

log before edit
  $ hg log --graph
  @  changeset:   6:3c6a8ed2ebe8
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     g
  |
  o  changeset:   5:652413bf663e
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     f
  |
  o  changeset:   4:e860deea161a
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     e
  |
  o  changeset:   3:055a42cdd887
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     d
  |
  o  changeset:   2:177f92b77385
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c
  |
  o  changeset:   1:d2ae7f538514
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:cb9a9f314b8b
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  

edit the history
  $ hg histedit 177f92b77385 --commands - 2>&1 << EOF| fixbundle
  > pick 177f92b77385 c
  > pick 055a42cdd887 d
  > edit e860deea161a e
  > pick 652413bf663e f
  > pick 3c6a8ed2ebe8 g
  > EOF
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  Make changes as needed, you may commit or record as needed now.
  When you are finished, run hg histedit --continue to resume.

edit the plan
  $ hg histedit --edit-plan --commands - 2>&1 << EOF
  > edit e860deea161a e
  > pick 652413bf663e f
  > drop 3c6a8ed2ebe8 g
  > EOF

Go at a random point and try to continue

  $ hg id -n
  3+
  $ hg up 0
  abort: histedit in progress
  (use 'hg histedit --continue' or 'hg histedit --abort')
  [255]

Try to delete necessary commit
  $ hg strip -r 652413bf663e
  abort: histedit in progress, can't strip 363532343133
  [255]

commit, then edit the revision
  $ hg ci -m 'wat'
  created new head
  $ echo a > e

qnew should fail while we're in the middle of the edit step

  $ hg --config extensions.mq= qnew please-fail
  abort: histedit in progress
  (use 'hg histedit --continue' or 'hg histedit --abort')
  [255]
  $ HGEDITOR='echo foobaz > ' hg histedit --continue 2>&1 | fixbundle
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg log --graph
  @  changeset:   6:b5f70786f9b0
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     f
  |
  o  changeset:   5:a5e1ba2f7afb
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     foobaz
  |
  o  changeset:   4:1a60820cd1f6
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     wat
  |
  o  changeset:   3:055a42cdd887
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     d
  |
  o  changeset:   2:177f92b77385
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c
  |
  o  changeset:   1:d2ae7f538514
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:cb9a9f314b8b
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  

  $ hg cat e
  a

check histedit_source

  $ hg log --debug --rev 5
  changeset:   5:a5e1ba2f7afb899ef1581cea528fd885d2fca70d
  phase:       draft
  parent:      4:1a60820cd1f6004a362aa622ebc47d59bc48eb34
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    5:5ad3be8791f39117565557781f5464363b918a45
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  files:       e
  extra:       branch=default
  extra:       histedit_source=e860deea161a2f77de56603b340ebbb4536308ae
  description:
  foobaz
  
  

  $ hg histedit tip --commands - 2>&1 <<EOF| fixbundle
  > edit b5f70786f9b0 f
  > EOF
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  Make changes as needed, you may commit or record as needed now.
  When you are finished, run hg histedit --continue to resume.
  $ hg status
  A f

  $ hg summary
  parent: 5:a5e1ba2f7afb 
   foobaz
  branch: default
  commit: 1 added (new branch head)
  update: 1 new changesets (update)
  hist:   1 remaining (histedit --continue)

(test also that editor is invoked if histedit is continued for
"edit" action)

  $ HGEDITOR='cat' hg histedit --continue
  f
  
  
  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 f
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/r/.hg/strip-backup/b5f70786f9b0-c28d9c86-backup.hg (glob)

  $ hg status

log after edit
  $ hg log --limit 1
  changeset:   6:a107ee126658
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     f
  

say we'll change the message, but don't.
  $ cat > ../edit.sh <<EOF
  > cat "\$1" | sed s/pick/mess/ > tmp
  > mv tmp "\$1"
  > EOF
  $ HGEDITOR="sh ../edit.sh" hg histedit tip 2>&1 | fixbundle
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg status
  $ hg log --limit 1
  changeset:   6:1fd3b2fe7754
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     f
  

modify the message

check saving last-message.txt, at first

  $ cat > $TESTTMP/commitfailure.py <<EOF
  > from mercurial import util
  > def reposetup(ui, repo):
  >     class commitfailure(repo.__class__):
  >         def commit(self, *args, **kwargs):
  >             raise util.Abort('emulating unexpected abort')
  >     repo.__class__ = commitfailure
  > EOF
  $ cat >> .hg/hgrc <<EOF
  > [extensions]
  > # this failure occurs before editor invocation
  > commitfailure = $TESTTMP/commitfailure.py
  > EOF

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

(test that editor is not invoked before transaction starting)

  $ rm -f .hg/last-message.txt
  $ HGEDITOR="sh $TESTTMP/editor.sh" hg histedit tip --commands - 2>&1 << EOF | fixbundle
  > mess 1fd3b2fe7754 f
  > EOF
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  abort: emulating unexpected abort
  $ test -f .hg/last-message.txt
  [1]

  $ cat >> .hg/hgrc <<EOF
  > [extensions]
  > commitfailure = !
  > EOF
  $ hg histedit --abort -q

(test that editor is invoked and commit message is saved into
"last-message.txt")

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > # this failure occurs after editor invocation
  > pretxncommit.unexpectedabort = false
  > EOF

  $ hg status --rev '1fd3b2fe7754^1' --rev 1fd3b2fe7754
  A f

  $ rm -f .hg/last-message.txt
  $ HGEDITOR="sh $TESTTMP/editor.sh" hg histedit tip --commands - 2>&1 << EOF
  > mess 1fd3b2fe7754 f
  > EOF
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  adding f
  ==== before editing
  f
  
  
  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 f
  ====
  transaction abort!
  rollback completed
  note: commit message saved in .hg/last-message.txt
  abort: pretxncommit.unexpectedabort hook exited with status 1
  [255]
  $ cat .hg/last-message.txt
  f
  
  
  check saving last-message.txt

(test also that editor is invoked if histedit is continued for "message"
action)

  $ HGEDITOR=cat hg histedit --continue
  f
  
  
  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 f
  transaction abort!
  rollback completed
  note: commit message saved in .hg/last-message.txt
  abort: pretxncommit.unexpectedabort hook exited with status 1
  [255]

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > pretxncommit.unexpectedabort =
  > EOF
  $ hg histedit --abort -q

then, check "modify the message" itself

  $ hg histedit tip --commands - 2>&1 << EOF | fixbundle
  > mess 1fd3b2fe7754 f
  > EOF
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg status
  $ hg log --limit 1
  changeset:   6:62feedb1200e
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     f
  

rollback should not work after a histedit
  $ hg rollback
  no rollback information available
  [1]

  $ cd ..
  $ hg clone -qr0 r r0
  $ cd r0
  $ hg phase -fdr0
  $ hg histedit --commands - 0 2>&1 << EOF
  > edit cb9a9f314b8b a > $EDITED
  > EOF
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  adding a
  Make changes as needed, you may commit or record as needed now.
  When you are finished, run hg histedit --continue to resume.
  [1]
  $ HGEDITOR=true hg histedit --continue
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/r0/.hg/strip-backup/cb9a9f314b8b-cc5ccb0b-backup.hg (glob)