annotate tests/test-template-functions.t @ 40417:49c7b701fdc2 stable

phase: add an archived phase

This phase allows for hidden changesets in the "user space". It differs from
the "internal" phase which is intended for internal by-product only. There
have been discussions at the 4.8 sprint to use such phase to speedup cleanup
after history rewriting operation.

Shipping it in the same release as the 'internal-phase' groups the associated
`requires` entry. The important bit is to have support for this phase in the
earliest version of mercurial possible. Adding the UI to manipulate this new
phase later seems fine.

The current plan for archived usage and user interface are as follow. On a
repository with internal-phase on and evolution off:

* history rewriting command set rewritten changeset in the archived phase.
  (This mean updating the cleanupnodes method).
* keep `hg unbundle .hg/strip-backup/X.hg` as a way to restore changeset for
  now
  (backup bundle need to contains phase data)
* [maybe] add a `hg strip --soft` advance flag
  (a light way to expose the feature without getting in the way of a better
  UI)

Mercurial 4.8 freeze is too close to get the above in by then.

We don't introduce a new repository `requirement` as we reuse the one
introduced with the 'archived' phase during the 4.8 cycle.

Test template filters and functions
===================================

  $ hg init a
  $ cd a
  $ echo a > a
  $ hg add a
  $ echo line 1 > b
  $ echo line 2 >> b
  $ hg commit -l b -d '1000000 0' -u 'User Name <user@hostname>'

  $ hg add b
  $ echo other 1 > c
  $ echo other 2 >> c
  $ echo >> c
  $ echo other 3 >> c
  $ hg commit -l c -d '1100000 0' -u 'A. N. Other <other@place>'

  $ hg add c
  $ hg commit -m 'no person' -d '1200000 0' -u 'other@place'
  $ echo c >> c
  $ hg commit -m 'no user, no domain' -d '1300000 0' -u 'person'

  $ echo foo > .hg/branch
  $ hg commit -m 'new branch' -d '1400000 0' -u 'person'

  $ hg co -q 3
  $ echo other 4 >> d
  $ hg add d
  $ hg commit -m 'new head' -d '1500000 0' -u 'person'

  $ hg merge -q foo
  $ hg commit -m 'merge' -d '1500001 0' -u 'person'

Second branch starting at nullrev:

  $ hg update null
  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ echo second > second
  $ hg add second
  $ hg commit -m second -d '1000000 0' -u 'User Name <user@hostname>'
  created new head

  $ echo third > third
  $ hg add third
  $ hg mv second fourth
  $ hg commit -m third -d "2020-01-01 10:01"

  $ hg phase -r 5 --public
  $ hg phase -r 7 --secret --force

Filters work:

  $ hg log --template '{author|domain}\n'
  
  hostname
  
  
  
  
  place
  place
  hostname

  $ hg log --template '{author|person}\n'
  test
  User Name
  person
  person
  person
  person
  other
  A. N. Other
  User Name

  $ hg log --template '{author|user}\n'
  test
  user
  person
  person
  person
  person
  other
  other
  user

  $ hg log --template '{date|date}\n'
  Wed Jan 01 10:01:00 2020 +0000
  Mon Jan 12 13:46:40 1970 +0000
  Sun Jan 18 08:40:01 1970 +0000
  Sun Jan 18 08:40:00 1970 +0000
  Sat Jan 17 04:53:20 1970 +0000
  Fri Jan 16 01:06:40 1970 +0000
  Wed Jan 14 21:20:00 1970 +0000
  Tue Jan 13 17:33:20 1970 +0000
  Mon Jan 12 13:46:40 1970 +0000

  $ hg log --template '{date|isodate}\n'
  2020-01-01 10:01 +0000
  1970-01-12 13:46 +0000
  1970-01-18 08:40 +0000
  1970-01-18 08:40 +0000
  1970-01-17 04:53 +0000
  1970-01-16 01:06 +0000
  1970-01-14 21:20 +0000
  1970-01-13 17:33 +0000
  1970-01-12 13:46 +0000

  $ hg log --template '{date|isodatesec}\n'
  2020-01-01 10:01:00 +0000
  1970-01-12 13:46:40 +0000
  1970-01-18 08:40:01 +0000
  1970-01-18 08:40:00 +0000
  1970-01-17 04:53:20 +0000
  1970-01-16 01:06:40 +0000
  1970-01-14 21:20:00 +0000
  1970-01-13 17:33:20 +0000
  1970-01-12 13:46:40 +0000

  $ hg log --template '{date|rfc822date}\n'
  Wed, 01 Jan 2020 10:01:00 +0000
  Mon, 12 Jan 1970 13:46:40 +0000
  Sun, 18 Jan 1970 08:40:01 +0000
  Sun, 18 Jan 1970 08:40:00 +0000
  Sat, 17 Jan 1970 04:53:20 +0000
  Fri, 16 Jan 1970 01:06:40 +0000
  Wed, 14 Jan 1970 21:20:00 +0000
  Tue, 13 Jan 1970 17:33:20 +0000
  Mon, 12 Jan 1970 13:46:40 +0000

  $ hg log --template '{desc|firstline}\n'
  third
  second
  merge
  new head
  new branch
  no user, no domain
  no person
  other 1
  line 1

  $ hg log --template '{node|short}\n'
  95c24699272e
  29114dbae42b
  d41e714fe50d
  13207e5a10d9
  bbe44766e73d
  10e46f2dcbf4
  97054abb4ab8
  b608e9d1a3f0
  1e4e1b8f71e0

  $ hg log --template '<changeset author="{author|xmlescape}"/>\n'
  <changeset author="test"/>
  <changeset author="User Name &lt;user@hostname&gt;"/>
  <changeset author="person"/>
  <changeset author="person"/>
  <changeset author="person"/>
  <changeset author="person"/>
  <changeset author="other@place"/>
  <changeset author="A. N. Other &lt;other@place&gt;"/>
  <changeset author="User Name &lt;user@hostname&gt;"/>

  $ hg log --template '{rev}: {children}\n'
  8: 
  7: 8:95c24699272e
  6: 
  5: 6:d41e714fe50d
  4: 6:d41e714fe50d
  3: 4:bbe44766e73d 5:13207e5a10d9
  2: 3:10e46f2dcbf4
  1: 2:97054abb4ab8
  0: 1:b608e9d1a3f0

Formatnode filter works:

  $ hg -q log -r 0 --template '{node|formatnode}\n'
  1e4e1b8f71e0

  $ hg log -r 0 --template '{node|formatnode}\n'
  1e4e1b8f71e0

  $ hg -v log -r 0 --template '{node|formatnode}\n'
  1e4e1b8f71e0

  $ hg --debug log -r 0 --template '{node|formatnode}\n'
  1e4e1b8f71e05681d422154f5421e385fec3454f

Age filter:

  $ hg init unstable-hash
  $ cd unstable-hash
  $ hg log --template '{date|age}\n' > /dev/null || exit 1

  >>> from __future__ import absolute_import
  >>> import datetime
  >>> fp = open('a', 'wb')
  >>> n = datetime.datetime.now() + datetime.timedelta(366 * 7)
  >>> fp.write(b'%d-%d-%d 00:00' % (n.year, n.month, n.day)) and None
  >>> fp.close()
  $ hg add a
  $ hg commit -m future -d "`cat a`"

  $ hg log -l1 --template '{date|age}\n'
  7 years from now

  $ cd ..
  $ rm -rf unstable-hash

Filename filters:

  $ hg debugtemplate '{"foo/bar"|basename}|{"foo/"|basename}|{"foo"|basename}|\n'
  bar||foo|
  $ hg debugtemplate '{"foo/bar"|dirname}|{"foo/"|dirname}|{"foo"|dirname}|\n'
  foo|foo||
  $ hg debugtemplate '{"foo/bar"|stripdir}|{"foo/"|stripdir}|{"foo"|stripdir}|\n'
  foo|foo|foo|

commondir() filter:

  $ hg debugtemplate '{""|splitlines|commondir}\n'
  
  $ hg debugtemplate '{"foo/bar\nfoo/baz\nfoo/foobar\n"|splitlines|commondir}\n'
  foo
  $ hg debugtemplate '{"foo/bar\nfoo/bar\n"|splitlines|commondir}\n'
  foo
  $ hg debugtemplate '{"/foo/bar\n/foo/bar\n"|splitlines|commondir}\n'
  foo
  $ hg debugtemplate '{"/foo\n/foo\n"|splitlines|commondir}\n'
  
  $ hg debugtemplate '{"foo/bar\nbar/baz"|splitlines|commondir}\n'
  
  $ hg debugtemplate '{"foo/bar\nbar/baz\nbar/foo\n"|splitlines|commondir}\n'
  
  $ hg debugtemplate '{"foo/../bar\nfoo/bar"|splitlines|commondir}\n'
  foo
  $ hg debugtemplate '{"foo\n/foo"|splitlines|commondir}\n'
  

  $ hg log -r null -T '{rev|commondir}'
  hg: parse error: argument is not a list of text
  (template filter 'commondir' is not compatible with keyword 'rev')
  [255]

Add a dummy commit to make up for the instability of the above:

  $ echo a > a
  $ hg add a
  $ hg ci -m future

Count filter:

  $ hg log -l1 --template '{node|count} {node|short|count}\n'
  40 12

  $ hg log -l1 --template '{revset("null^")|count} {revset(".")|count} {revset("0::3")|count}\n'
  0 1 4

  $ hg log -G --template '{rev}: children: {children|count}, \
  > tags: {tags|count}, file_adds: {file_adds|count}, \
  > ancestors: {revset("ancestors(%s)", rev)|count}'
  @  9: children: 0, tags: 1, file_adds: 1, ancestors: 3
  |
  o  8: children: 1, tags: 0, file_adds: 2, ancestors: 2
  |
  o  7: children: 1, tags: 0, file_adds: 1, ancestors: 1
  
  o    6: children: 0, tags: 0, file_adds: 0, ancestors: 7
  |\
  | o  5: children: 1, tags: 0, file_adds: 1, ancestors: 5
  | |
  o |  4: children: 1, tags: 0, file_adds: 0, ancestors: 5
  |/
  o  3: children: 2, tags: 0, file_adds: 0, ancestors: 4
  |
  o  2: children: 1, tags: 0, file_adds: 1, ancestors: 3
  |
  o  1: children: 1, tags: 0, file_adds: 1, ancestors: 2
  |
  o  0: children: 1, tags: 0, file_adds: 1, ancestors: 1
  

  $ hg log -l1 -T '{termwidth|count}\n'
  hg: parse error: not countable
  (template filter 'count' is not compatible with keyword 'termwidth')
  [255]

Upper/lower filters:

  $ hg log -r0 --template '{branch|upper}\n'
  DEFAULT
  $ hg log -r0 --template '{author|lower}\n'
  user name <user@hostname>
  $ hg log -r0 --template '{date|upper}\n'
  1000000.00

Add a commit that does all possible modifications at once

  $ echo modify >> third
  $ touch b
  $ hg add b
  $ hg mv fourth fifth
  $ hg rm a
  $ hg ci -m "Modify, add, remove, rename"

Pass generator object created by template function to filter

  $ hg log -l 1 --template '{if(author, author)|user}\n'
  test

Test diff function:

  $ hg diff -c 8
  diff -r 29114dbae42b -r 95c24699272e fourth
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +second
  diff -r 29114dbae42b -r 95c24699272e second
  --- a/second	Mon Jan 12 13:46:40 1970 +0000
  +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +0,0 @@
  -second
  diff -r 29114dbae42b -r 95c24699272e third
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/third	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +third

  $ hg log -r 8 -T "{diff()}"
  diff -r 29114dbae42b -r 95c24699272e fourth
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +second
  diff -r 29114dbae42b -r 95c24699272e second
  --- a/second	Mon Jan 12 13:46:40 1970 +0000
  +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +0,0 @@
  -second
  diff -r 29114dbae42b -r 95c24699272e third
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/third	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +third

  $ hg log -r 8 -T "{diff('glob:f*')}"
  diff -r 29114dbae42b -r 95c24699272e fourth
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +second

  $ hg log -r 8 -T "{diff('', 'glob:f*')}"
  diff -r 29114dbae42b -r 95c24699272e second
  --- a/second	Mon Jan 12 13:46:40 1970 +0000
  +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +0,0 @@
  -second
  diff -r 29114dbae42b -r 95c24699272e third
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/third	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +third

  $ hg log -r 8 -T "{diff('FOURTH'|lower)}"
  diff -r 29114dbae42b -r 95c24699272e fourth
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
  @@ -0,0 +1,1 @@
  +second

  $ cd ..

latesttag() function:

  $ hg init latesttag
  $ cd latesttag

  $ echo a > file
  $ hg ci -Am a -d '0 0'
  adding file

  $ echo b >> file
  $ hg ci -m b -d '1 0'

  $ echo c >> head1
  $ hg ci -Am h1c -d '2 0'
  adding head1

  $ hg update -q 1
  $ echo d >> head2
  $ hg ci -Am h2d -d '3 0'
  adding head2
  created new head

  $ echo e >> head2
  $ hg ci -m h2e -d '4 0'

  $ hg merge -q
  $ hg ci -m merge -d '5 -3600'

  $ hg tag -r 1 -m t1 -d '6 0' t1
  $ hg tag -r 2 -m t2 -d '7 0' t2
  $ hg tag -r 3 -m t3 -d '8 0' t3
  $ hg tag -r 4 -m t4 -d '4 0' t4 # older than t2, but should not matter
  $ hg tag -r 5 -m t5 -d '9 0' t5
  $ hg tag -r 3 -m at3 -d '10 0' at3

  $ hg log -G --template "{rev}: {latesttag('re:^t[13]$') % '{tag}, C: {changes}, D: {distance}'}\n"
  @  11: t3, C: 9, D: 8
  |
  o  10: t3, C: 8, D: 7
  |
  o  9: t3, C: 7, D: 6
  |
  o  8: t3, C: 6, D: 5
  |
  o  7: t3, C: 5, D: 4
  |
  o  6: t3, C: 4, D: 3
  |
  o    5: t3, C: 3, D: 2
  |\
  | o  4: t3, C: 1, D: 1
  | |
  | o  3: t3, C: 0, D: 0
  | |
  o |  2: t1, C: 1, D: 1
  |/
  o  1: t1, C: 0, D: 0
  |
  o  0: null, C: 1, D: 1
  

  $ cd ..

Test filter() empty values:

  $ hg log -R a -r 1 -T '{filter(desc|splitlines) % "{line}\n"}'
  other 1
  other 2
  other 3
  $ hg log -R a -r 0 -T '{filter(dict(a=0, b=1) % "{ifeq(key, "a", "{value}\n")}")}'
  0

 0 should not be falsy

  $ hg log -R a -r 0 -T '{filter(revset("0:2"))}\n'
  0 1 2

Test filter() by expression:

  $ hg log -R a -r 1 -T '{filter(desc|splitlines, ifcontains("1", line, "t"))}\n'
  other 1
  $ hg log -R a -r 0 -T '{filter(dict(a=0, b=1), ifeq(key, "b", "t"))}\n'
  b=1

Test filter() shouldn't crash:

  $ hg log -R a -r 0 -T '{filter(extras)}\n'
  branch=default
  $ hg log -R a -r 0 -T '{filter(files)}\n'
  a

Test filter() unsupported arguments:

  $ hg log -R a -r 0 -T '{filter()}\n'
  hg: parse error: filter expects one or two arguments
  [255]
  $ hg log -R a -r 0 -T '{filter(date)}\n'
  hg: parse error: date is not iterable
  [255]
  $ hg log -R a -r 0 -T '{filter(rev)}\n'
  hg: parse error: 0 is not iterable
  [255]
  $ hg log -R a -r 0 -T '{filter(desc|firstline)}\n'
  hg: parse error: 'line 1' is not filterable
  [255]
  $ hg log -R a -r 0 -T '{filter(manifest)}\n'
  hg: parse error: '0:a0c8bcbbb45c' is not filterable
  [255]
  $ hg log -R a -r 0 -T '{filter(succsandmarkers)}\n'
  hg: parse error: not filterable without template
  [255]
  $ hg log -R a -r 0 -T '{filter(desc|splitlines % "{line}", "")}\n'
  hg: parse error: not filterable by expression
  [255]

Test manifest/get() can be join()-ed as string, though it's silly:

  $ hg log -R latesttag -r tip -T '{join(manifest, ".")}\n'
  1.1.:.2.b.c.6.e.9.0.0.6.c.e.2
  $ hg log -R latesttag -r tip -T '{join(get(extras, "branch"), ".")}\n'
  d.e.f.a.u.l.t

Test join() over string

  $ hg log -R latesttag -r tip -T '{join(rev|stringify, ".")}\n'
  1.1

Test join() over uniterable

  $ hg log -R latesttag -r tip -T '{join(rev, "")}\n'
  hg: parse error: 11 is not iterable
  [255]

Test min/max of integers

  $ hg log -R latesttag -l1 -T '{min(revset("9:10"))}\n'
  9
  $ hg log -R latesttag -l1 -T '{max(revset("9:10"))}\n'
  10

Test min/max over map operation:

  $ hg log -R latesttag -r3 -T '{min(tags % "{tag}")}\n'
  at3
  $ hg log -R latesttag -r3 -T '{max(tags % "{tag}")}\n'
  t3

Test min/max of strings:

  $ hg log -R latesttag -l1 -T '{min(desc)}\n'
  3
  $ hg log -R latesttag -l1 -T '{max(desc)}\n'
  t

Test min/max of non-iterable:

  $ hg debugtemplate '{min(1)}'
  hg: parse error: 1 is not iterable
  (min first argument should be an iterable)
  [255]
  $ hg debugtemplate '{max(2)}'
  hg: parse error: 2 is not iterable
  (max first argument should be an iterable)
  [255]

  $ hg log -R latesttag -l1 -T '{min(date)}'
  hg: parse error: date is not iterable
  (min first argument should be an iterable)
  [255]
  $ hg log -R latesttag -l1 -T '{max(date)}'
  hg: parse error: date is not iterable
  (max first argument should be an iterable)
  [255]

Test min/max of empty sequence:

  $ hg debugtemplate '{min("")}'
  hg: parse error: empty string
  (min first argument should be an iterable)
  [255]
  $ hg debugtemplate '{max("")}'
  hg: parse error: empty string
  (max first argument should be an iterable)
  [255]
  $ hg debugtemplate '{min(dict())}'
  hg: parse error: empty sequence
  (min first argument should be an iterable)
  [255]
  $ hg debugtemplate '{max(dict())}'
  hg: parse error: empty sequence
  (max first argument should be an iterable)
  [255]
  $ hg debugtemplate '{min(dict() % "")}'
  hg: parse error: empty sequence
  (min first argument should be an iterable)
  [255]
  $ hg debugtemplate '{max(dict() % "")}'
  hg: parse error: empty sequence
  (max first argument should be an iterable)
  [255]

Test min/max of if() result

  $ cd latesttag
  $ hg log -l1 -T '{min(if(true, revset("9:10"), ""))}\n'
  9
  $ hg log -l1 -T '{max(if(false, "", revset("9:10")))}\n'
  10
  $ hg log -l1 -T '{min(ifcontains("a", "aa", revset("9:10"), ""))}\n'
  9
  $ hg log -l1 -T '{max(ifcontains("a", "bb", "", revset("9:10")))}\n'
  10
  $ hg log -l1 -T '{min(ifeq(0, 0, revset("9:10"), ""))}\n'
  9
  $ hg log -l1 -T '{max(ifeq(0, 1, "", revset("9:10")))}\n'
  10
  $ cd ..

Test laziness of if() then/else clause

  $ hg debugtemplate '{count(0)}'
  hg: parse error: not countable
  (incompatible use of template filter 'count')
  [255]
  $ hg debugtemplate '{if(true, "", count(0))}'
  $ hg debugtemplate '{if(false, count(0), "")}'
  $ hg debugtemplate '{ifcontains("a", "aa", "", count(0))}'
  $ hg debugtemplate '{ifcontains("a", "bb", count(0), "")}'
  $ hg debugtemplate '{ifeq(0, 0, "", count(0))}'
  $ hg debugtemplate '{ifeq(0, 1, count(0), "")}'

Test the sub function of templating for expansion:

  $ hg log -R latesttag -r 10 --template '{sub("[0-9]", "x", "{rev}")}\n'
  xx

  $ hg log -R latesttag -r 10 -T '{sub("[", "x", rev)}\n'
  hg: parse error: sub got an invalid pattern: [
  [255]
  $ hg log -R latesttag -r 10 -T '{sub("[0-9]", r"\1", rev)}\n'
  hg: parse error: sub got an invalid replacement: \1
  [255]

Test the strip function with chars specified:

  $ hg log -R latesttag --template '{desc}\n'
  at3
  t5
  t4
  t3
  t2
  t1
  merge
  h2e
  h2d
  h1c
  b
  a

  $ hg log -R latesttag --template '{strip(desc, "te")}\n'
  at3
  5
  4
  3
  2
  1
  merg
  h2
  h2d
  h1c
  b
  a

Test date format:

  $ hg log -R latesttag --template 'date: {date(date, "%y %m %d %S %z")}\n'
  date: 70 01 01 10 +0000
  date: 70 01 01 09 +0000
  date: 70 01 01 04 +0000
  date: 70 01 01 08 +0000
  date: 70 01 01 07 +0000
  date: 70 01 01 06 +0000
  date: 70 01 01 05 +0100
  date: 70 01 01 04 +0000
  date: 70 01 01 03 +0000
  date: 70 01 01 02 +0000
  date: 70 01 01 01 +0000
  date: 70 01 01 00 +0000

Test invalid date:

  $ hg log -R latesttag -T '{date(rev)}\n'
  hg: parse error: date expects a date information
  [255]

Set up repository containing template fragments in commit metadata:

  $ hg init r
  $ cd r
  $ echo a > a
  $ hg ci -Am '{rev}'
  adding a

  $ hg branch -q 'text.{rev}'
  $ echo aa >> aa
  $ hg ci -u '{node|short}' -m 'desc to be wrapped desc to be wrapped'

color effect can be specified without quoting:

  $ hg log --color=always -l 1 --template '{label(red, "text\n")}'
  \x1b[0;31mtext\x1b[0m (esc)

color effects can be nested (issue5413)

  $ hg debugtemplate --color=always \
  > '{label(red, "red{label(magenta, "ma{label(cyan, "cyan")}{label(yellow, "yellow")}genta")}")}\n'
  \x1b[0;31mred\x1b[0;35mma\x1b[0;36mcyan\x1b[0m\x1b[0;31m\x1b[0;35m\x1b[0;33myellow\x1b[0m\x1b[0;31m\x1b[0;35mgenta\x1b[0m (esc)

pad() should interact well with color codes (issue5416)

  $ hg debugtemplate --color=always \
  > '{pad(label(red, "red"), 5, label(cyan, "-"))}\n'
  \x1b[0;31mred\x1b[0m\x1b[0;36m-\x1b[0m\x1b[0;36m-\x1b[0m (esc)

pad() with truncate has to strip color codes, though

  $ hg debugtemplate --color=always \
  > '{pad(label(red, "scarlet"), 5, truncate=true)}\n'
  scarl

label should be no-op if color is disabled:

  $ hg log --color=never -l 1 --template '{label(red, "text\n")}'
  text
  $ hg log --config extensions.color=! -l 1 --template '{label(red, "text\n")}'
  text

Test branches inside if statement:

  $ hg log -r 0 --template '{if(branches, "yes", "no")}\n'
  no

Test dict constructor:

  $ hg log -r 0 -T '{dict(y=node|short, x=rev)}\n'
  y=f7769ec2ab97 x=0
  $ hg log -r 0 -T '{dict(x=rev, y=node|short) % "{key}={value}\n"}'
  x=0
  y=f7769ec2ab97
  $ hg log -r 0 -T '{dict(x=rev, y=node|short)|json}\n'
  {"x": 0, "y": "f7769ec2ab97"}
  $ hg log -r 0 -T '{dict()|json}\n'
  {}

  $ hg log -r 0 -T '{dict(rev, node=node|short)}\n'
  rev=0 node=f7769ec2ab97
  $ hg log -r 0 -T '{dict(rev, node|short)}\n'
  rev=0 node=f7769ec2ab97

  $ hg log -r 0 -T '{dict(rev, rev=rev)}\n'
  hg: parse error: duplicated dict key 'rev' inferred
  [255]
  $ hg log -r 0 -T '{dict(node, node|short)}\n'
  hg: parse error: duplicated dict key 'node' inferred
  [255]
  $ hg log -r 0 -T '{dict(1 + 2)}'
  hg: parse error: dict key cannot be inferred
  [255]

  $ hg log -r 0 -T '{dict(x=rev, x=node)}'
  hg: parse error: dict got multiple values for keyword argument 'x'
  [255]

Test get function:

  $ hg log -r 0 --template '{get(extras, "branch")}\n'
  default
  $ hg log -r 0 --template '{get(extras, "br{"anch"}")}\n'
  default
  $ hg log -r 0 --template '{get(files, "should_fail")}\n'
  hg: parse error: not a dictionary
  (get() expects a dict as first argument)
  [255]

Test json filter applied to wrapped object:

  $ hg log -r0 -T '{files|json}\n'
  ["a"]
  $ hg log -r0 -T '{extras|json}\n'
  {"branch": "default"}
  $ hg log -r0 -T '{date|json}\n'
  [0, 0]

Test json filter applied to map result:

  $ hg log -r0 -T '{json(extras % "{key}")}\n'
  ["branch"]

Test localdate(date, tz) function:

  $ TZ=JST-09 hg log -r0 -T '{date|localdate|isodate}\n'
  1970-01-01 09:00 +0900
  $ TZ=JST-09 hg log -r0 -T '{localdate(date, "UTC")|isodate}\n'
  1970-01-01 00:00 +0000
  $ TZ=JST-09 hg log -r0 -T '{localdate(date, "blahUTC")|isodate}\n'
  hg: parse error: localdate expects a timezone
  [255]
  $ TZ=JST-09 hg log -r0 -T '{localdate(date, "+0200")|isodate}\n'
  1970-01-01 02:00 +0200
  $ TZ=JST-09 hg log -r0 -T '{localdate(date, "0")|isodate}\n'
  1970-01-01 00:00 +0000
  $ TZ=JST-09 hg log -r0 -T '{localdate(date, 0)|isodate}\n'
  1970-01-01 00:00 +0000
  $ hg log -r0 -T '{localdate(date, "invalid")|isodate}\n'
  hg: parse error: localdate expects a timezone
  [255]
  $ hg log -r0 -T '{localdate(date, date)|isodate}\n'
  hg: parse error: localdate expects a timezone
  [255]

Test shortest(node) function:

  $ echo b > b
  $ hg ci -qAm b
  $ hg log --template '{shortest(node)}\n'
  e777
  bcc7
  f776
  $ hg log --template '{shortest(node, 10)}\n'
  e777603221
  bcc7ff960b
  f7769ec2ab
  $ hg log --template '{shortest(node, 1)}\n' -r null
  00
  $ hg log --template '{node|shortest}\n' -l1
  e777

  $ hg log -r 0 -T '{shortest(node, "1{"0"}")}\n'
  f7769ec2ab
  $ hg log -r 0 -T '{shortest(node, "not an int")}\n'
  hg: parse error: shortest() expects an integer minlength
  [255]

  $ hg log -r 'wdir()' -T '{node|shortest}\n'
  ffff

  $ hg log --template '{shortest("f")}\n' -l1
  f

  $ hg log --template '{shortest("0123456789012345678901234567890123456789")}\n' -l1
  0123456789012345678901234567890123456789

  $ hg log --template '{shortest("01234567890123456789012345678901234567890123456789")}\n' -l1
  01234567890123456789012345678901234567890123456789

  $ hg log --template '{shortest("not a hex string")}\n' -l1
  not a hex string

  $ hg log --template '{shortest("not a hex string, but it'\''s 40 bytes long")}\n' -l1
  not a hex string, but it's 40 bytes long

  $ hg log --template '{shortest("ffffffffffffffffffffffffffffffffffffffff")}\n' -l1
  ffff

  $ hg log --template '{shortest("fffffff")}\n' -l1
  ffff

  $ hg log --template '{shortest("ff")}\n' -l1
  ffff

  $ cd ..

Test shortest(node) with the repo having short hash collision:

  $ hg init hashcollision
  $ cd hashcollision
  $ cat <<EOF >> .hg/hgrc
  > [experimental]
  > evolution.createmarkers=True
  > EOF
  $ echo 0 > a
  $ hg ci -qAm 0
  $ for i in 17 129 248 242 480 580 617 1057 2857 4025; do
  >   hg up -q 0
  >   echo $i > a
  >   hg ci -qm $i
  > done
  $ hg up -q null
  $ hg log -r0: -T '{rev}:{node}\n'
  0:b4e73ffab476aa0ee32ed81ca51e07169844bc6a
  1:11424df6dc1dd4ea255eae2b58eaca7831973bbc
  2:11407b3f1b9c3e76a79c1ec5373924df096f0499
  3:11dd92fe0f39dfdaacdaa5f3997edc533875cfc4
  4:10776689e627b465361ad5c296a20a487e153ca4
  5:a00be79088084cb3aff086ab799f8790e01a976b
  6:a0b0acd79b4498d0052993d35a6a748dd51d13e6
  7:a0457b3450b8e1b778f1163b31a435802987fe5d
  8:c56256a09cd28e5764f32e8e2810d0f01e2e357a
  9:c5623987d205cd6d9d8389bfc40fff9dbb670b48
  10:c562ddd9c94164376c20b86b0b4991636a3bf84f
  $ hg debugobsolete a00be79088084cb3aff086ab799f8790e01a976b
  obsoleted 1 changesets
  $ hg debugobsolete c5623987d205cd6d9d8389bfc40fff9dbb670b48
  obsoleted 1 changesets
  $ hg debugobsolete c562ddd9c94164376c20b86b0b4991636a3bf84f
  obsoleted 1 changesets

 nodes starting with '11' (we don't have the revision number '11' though)

  $ hg log -r 1:3 -T '{rev}:{shortest(node, 0)}\n'
  1:1142
  2:1140
  3:11d

 '5:a00' is hidden, but still we have two nodes starting with 'a0'

  $ hg log -r 6:7 -T '{rev}:{shortest(node, 0)}\n'
  6:a0b
  7:a04

 node '10' conflicts with the revision number '10' even if it is hidden
 (we could exclude hidden revision numbers, but currently we don't)

  $ hg log -r 4 -T '{rev}:{shortest(node, 0)}\n'
  4:107
  $ hg log -r 4 -T '{rev}:{shortest(node, 0)}\n' --hidden
  4:107

  $ hg --config experimental.revisions.prefixhexnode=yes log -r 4 -T '{rev}:{shortest(node, 0)}\n'
  4:x10
  $ hg --config experimental.revisions.prefixhexnode=yes log -r 4 -T '{rev}:{shortest(node, 0)}\n' --hidden
  4:x10

 node 'c562' should be unique if the other 'c562' nodes are hidden
 (but we don't try the slow path to filter out hidden nodes for now)

  $ hg log -r 8 -T '{rev}:{node|shortest}\n'
  8:c5625
  $ hg log -r 8:10 -T '{rev}:{node|shortest}\n' --hidden
  8:c5625
  9:c5623
  10:c562d

  $ cd ..

Test prefixhexnode when the first character of the hash is 0.
  $ hg init hashcollision2
  $ cd hashcollision2
  $ cat <<EOF >> .hg/hgrc
  > [experimental]
  > evolution.createmarkers=True
  > EOF
  $ echo 0 > a
  $ hg ci -qAm 0
  $ echo 21 > a
  $ hg ci -qm 21
  $ hg up -q null
  $ hg log -r0: -T '{rev}:{node}\n'
  0:b4e73ffab476aa0ee32ed81ca51e07169844bc6a
  1:0cf177ba2b1dc3862a00fb81715fec90950201be

 we need the 'x' prefix to ensure we aren't colliding with rev0. We identify
 the collision with nullid if we aren't using disambiguatewithin, so we need to set
 that as well.
  $ hg --config experimental.revisions.disambiguatewithin='descendants(0)' \
  >    --config experimental.revisions.prefixhexnode=yes \
  >    log -r 1 -T '{rev}:{shortest(node, 0)}\n'
  1:x0

  $ hg debugobsolete 0cf177ba2b1dc3862a00fb81715fec90950201be
  obsoleted 1 changesets
  $ hg up -q 0
  $ echo 61 > a
  $ hg ci -m 61
  $ hg log -r0: -T '{rev}:{node}\n'
  0:b4e73ffab476aa0ee32ed81ca51e07169844bc6a
  2:01384dde84b3a511ae0835f35ac40bd806c99bb8

 we still have the 'x' prefix because '0' is still the shortest prefix, since
 rev1's '0c' is hidden.
  $ hg --config experimental.revisions.disambiguatewithin=0:-1-0 \
  >    --config experimental.revisions.prefixhexnode=yes \
  >    log -r 0:-1-0 -T '{rev}:{shortest(node, 0)}\n'
  2:x0

 we don't have the 'x' prefix on 2 because '01' is not a synonym for rev1.
  $ hg --config experimental.revisions.disambiguatewithin=0:-1-0 \
  >    --config experimental.revisions.prefixhexnode=yes \
  >    log -r 0:-1-0 -T '{rev}:{shortest(node, 0)}\n' --hidden
  1:0c
  2:01

  $ cd ..

Test pad function

  $ cd r

  $ hg log --template '{pad(rev, 20)} {author|user}\n'
  2                    test
  1                    {node|short}
  0                    test

  $ hg log --template '{pad(rev, 20, " ", True)} {author|user}\n'
                     2 test
                     1 {node|short}
                     0 test

  $ hg log --template '{pad(rev, 20, "-", False)} {author|user}\n'
  2------------------- test
  1------------------- {node|short}
  0------------------- test

  $ hg log --template '{pad(author, 5, "-", False, True)}\n'
  test-
  {node
  test-
  $ hg log --template '{pad(author, 5, "-", True, True)}\n'
  -test
  hort}
  -test

Test template string in pad function

  $ hg log -r 0 -T '{pad("\{{rev}}", 10)} {author|user}\n'
  {0}        test

  $ hg log -r 0 -T '{pad(r"\{rev}", 10)} {author|user}\n'
  \{rev}     test

Test width argument passed to pad function

  $ hg log -r 0 -T '{pad(rev, "1{"0"}")} {author|user}\n'
  0          test
  $ hg log -r 0 -T '{pad(rev, "not an int")}\n'
  hg: parse error: pad() expects an integer width
  [255]

Test invalid fillchar passed to pad function

  $ hg log -r 0 -T '{pad(rev, 10, "")}\n'
  hg: parse error: pad() expects a single fill character
  [255]
  $ hg log -r 0 -T '{pad(rev, 10, "--")}\n'
  hg: parse error: pad() expects a single fill character
  [255]

Test boolean argument passed to pad function

 no crash

  $ hg log -r 0 -T '{pad(rev, 10, "-", "f{"oo"}")}\n'
  ---------0

 string/literal

  $ hg log -r 0 -T '{pad(rev, 10, "-", "false")}\n'
  ---------0
  $ hg log -r 0 -T '{pad(rev, 10, "-", false)}\n'
  0---------
  $ hg log -r 0 -T '{pad(rev, 10, "-", "")}\n'
  0---------

 unknown keyword is evaluated to ''

  $ hg log -r 0 -T '{pad(rev, 10, "-", unknownkeyword)}\n'
  0---------

Test separate function

  $ hg log -r 0 -T '{separate("-", "", "a", "b", "", "", "c", "")}\n'
  a-b-c
  $ hg log -r 0 -T '{separate(" ", "{rev}:{node|short}", author|user, branch)}\n'
  0:f7769ec2ab97 test default
  $ hg log -r 0 --color=always -T '{separate(" ", "a", label(red, "b"), "c", label(red, ""), "d")}\n'
  a \x1b[0;31mb\x1b[0m c d (esc)

Test boolean expression/literal passed to if function

  $ hg log -r 0 -T '{if(rev, "rev 0 is True")}\n'
  rev 0 is True
  $ hg log -r 0 -T '{if(0, "literal 0 is True as well")}\n'
  literal 0 is True as well
  $ hg log -r 0 -T '{if(min(revset(r"0")), "0 of hybriditem is also True")}\n'
  0 of hybriditem is also True
  $ hg log -r 0 -T '{if("", "", "empty string is False")}\n'
  empty string is False
  $ hg log -r 0 -T '{if(revset(r"0 - 0"), "", "empty list is False")}\n'
  empty list is False
  $ hg log -r 0 -T '{if(revset(r"0"), "non-empty list is True")}\n'
  non-empty list is True
  $ hg log -r 0 -T '{if(revset(r"0") % "", "list of empty strings is True")}\n'
  list of empty strings is True
  $ hg log -r 0 -T '{if(true, "true is True")}\n'
  true is True
  $ hg log -r 0 -T '{if(false, "", "false is False")}\n'
  false is False
  $ hg log -r 0 -T '{if("false", "non-empty string is True")}\n'
  non-empty string is True

Test ifcontains function

  $ hg log --template '{rev} {ifcontains(rev, "2 two 0", "is in the string", "is not")}\n'
  2 is in the string
  1 is not
  0 is in the string

  $ hg log -T '{rev} {ifcontains(rev, "2 two{" 0"}", "is in the string", "is not")}\n'
  2 is in the string
  1 is not
  0 is in the string

  $ hg log --template '{rev} {ifcontains("a", file_adds, "added a", "did not add a")}\n'
  2 did not add a
  1 did not add a
  0 added a

  $ hg log --debug -T '{rev}{ifcontains(1, parents, " is parent of 1")}\n'
  2 is parent of 1
  1
  0

  $ hg log -l1 -T '{ifcontains("branch", extras, "t", "f")}\n'
  t
  $ hg log -l1 -T '{ifcontains("branch", extras % "{key}", "t", "f")}\n'
  t
  $ hg log -l1 -T '{ifcontains("branc", extras % "{key}", "t", "f")}\n'
  f
  $ hg log -l1 -T '{ifcontains("branc", stringify(extras % "{key}"), "t", "f")}\n'
  t

Test revset function

  $ hg log --template '{rev} {ifcontains(rev, revset("."), "current rev", "not current rev")}\n'
  2 current rev
  1 not current rev
  0 not current rev

  $ hg log --template '{rev} {ifcontains(rev, revset(". + .^"), "match rev", "not match rev")}\n'
  2 match rev
  1 match rev
  0 not match rev

  $ hg log -T '{ifcontains(desc, revset(":"), "", "type not match")}\n' -l1
  type not match

  $ hg log --template '{rev} Parents: {revset("parents(%s)", rev)}\n'
  2 Parents: 1
  1 Parents: 0
  0 Parents: 

  $ cat >> .hg/hgrc <<EOF
  > [revsetalias]
  > myparents(\$1) = parents(\$1)
  > EOF
  $ hg log --template '{rev} Parents: {revset("myparents(%s)", rev)}\n'
  2 Parents: 1
  1 Parents: 0
  0 Parents: 

  $ hg log --template 'Rev: {rev}\n{revset("::%s", rev) % "Ancestor: {revision}\n"}\n'
  Rev: 2
  Ancestor: 0
  Ancestor: 1
  Ancestor: 2
  
  Rev: 1
  Ancestor: 0
  Ancestor: 1
  
  Rev: 0
  Ancestor: 0
  
  $ hg log --template '{revset("TIP"|lower)}\n' -l1
  2

  $ hg log -T '{revset("%s", "t{"ip"}")}\n' -l1
  2

 a list template is evaluated for each item of revset/parents

  $ hg log -T '{rev} p: {revset("p1(%s)", rev) % "{rev}:{node|short}"}\n'
  2 p: 1:bcc7ff960b8e
  1 p: 0:f7769ec2ab97
  0 p: 

  $ hg log --debug -T '{rev} p:{parents % " {rev}:{node|short}"}\n'
  2 p: 1:bcc7ff960b8e -1:000000000000
  1 p: 0:f7769ec2ab97 -1:000000000000
  0 p: -1:000000000000 -1:000000000000

 therefore, 'revcache' should be recreated for each rev

  $ hg log -T '{rev} {file_adds}\np {revset("p1(%s)", rev) % "{file_adds}"}\n'
  2 aa b
  p 
  1 
  p a
  0 a
  p 

  $ hg log --debug -T '{rev} {file_adds}\np {parents % "{file_adds}"}\n'
  2 aa b
  p 
  1 
  p a
  0 a
  p 

a revset item must be evaluated as an integer revision, not an offset from tip

  $ hg log -l 1 -T '{revset("null") % "{rev}:{node|short}"}\n'
  -1:000000000000
  $ hg log -l 1 -T '{revset("%s", "null") % "{rev}:{node|short}"}\n'
  -1:000000000000

join() should pick '{rev}' from revset items:

  $ hg log -R ../a -T '{join(revset("parents(%d)", rev), ", ")}\n' -r6
  4, 5

on the other hand, parents are formatted as '{rev}:{node|formatnode}' by
default. join() should agree with the default formatting:

  $ hg log -R ../a -T '{join(parents, ", ")}\n' -r6
  5:13207e5a10d9, 4:bbe44766e73d

  $ hg log -R ../a -T '{join(parents, ",\n")}\n' -r6 --debug
  5:13207e5a10d9fd28ec424934298e176197f2c67f,
  4:bbe44766e73d5f11ed2177f1838de10c53ef3e74

Invalid arguments passed to revset()

  $ hg log -T '{revset("%whatever", 0)}\n'
  hg: parse error: unexpected revspec format character w
  [255]
  $ hg log -T '{revset("%lwhatever", files)}\n'
  hg: parse error: unexpected revspec format character w
  [255]
  $ hg log -T '{revset("%s %s", 0)}\n'
  hg: parse error: missing argument for revspec
  [255]
  $ hg log -T '{revset("", 0)}\n'
  hg: parse error: too many revspec arguments specified
  [255]
  $ hg log -T '{revset("%s", 0, 1)}\n'
  hg: parse error: too many revspec arguments specified
  [255]
  $ hg log -T '{revset("%", 0)}\n'
  hg: parse error: incomplete revspec format character
  [255]
  $ hg log -T '{revset("%l", 0)}\n'
  hg: parse error: incomplete revspec format character
  [255]
  $ hg log -T '{revset("%d", 'foo')}\n'
  hg: parse error: invalid argument for revspec
  [255]
  $ hg log -T '{revset("%ld", files)}\n'
  hg: parse error: invalid argument for revspec
  [255]
  $ hg log -T '{revset("%ls", 0)}\n'
  hg: parse error: invalid argument for revspec
  [255]
  $ hg log -T '{revset("%b", 'foo')}\n'
  hg: parse error: invalid argument for revspec
  [255]
  $ hg log -T '{revset("%lb", files)}\n'
  hg: parse error: invalid argument for revspec
  [255]
  $ hg log -T '{revset("%r", 0)}\n'
  hg: parse error: invalid argument for revspec
  [255]

Test files function

  $ hg log -T "{rev}\n{join(files('*'), '\n')}\n"
  2
  a
  aa
  b
  1
  a
  0
  a

  $ hg log -T "{rev}\n{join(files('aa'), '\n')}\n"
  2
  aa
  1
  
  0
  

  $ hg log -l1 -T "{files('aa') % '{file}\n'}"
  aa
  $ hg log -l1 -T "{files('aa') % '{path}\n'}"
  aa

  $ hg rm a
  $ hg log -r "wdir()" -T "{rev}\n{join(files('*'), '\n')}\n"
  2147483647
  aa
  b
  $ hg revert a

Test relpath function

  $ hg log -r0 -T '{files % "{file|relpath}\n"}'
  a
  $ cd ..
  $ hg log -R r -r0 -T '{files % "{file|relpath}\n"}'
  r/a

Test stringify on sub expressions

  $ hg log -R a -r 8 --template '{join(files, if("1", if("1", ", ")))}\n'
  fourth, second, third
  $ hg log -R a -r 8 --template '{strip(if("1", if("1", "-abc-")), if("1", if("1", "-")))}\n'
  abc

Test splitlines

  $ hg log -Gv -R a --template "{splitlines(desc) % 'foo {line}\n'}"
  @  foo Modify, add, remove, rename
  |
  o  foo future
  |
  o  foo third
  |
  o  foo second
  
  o    foo merge
  |\
  | o  foo new head
  | |
  o |  foo new branch
  |/
  o  foo no user, no domain
  |
  o  foo no person
  |
  o  foo other 1
  |  foo other 2
  |  foo
  |  foo other 3
  o  foo line 1
     foo line 2

  $ hg log -R a -r0 -T '{desc|splitlines}\n'
  line 1 line 2
  $ hg log -R a -r0 -T '{join(desc|splitlines, "|")}\n'
  line 1|line 2

Test startswith
  $ hg log -Gv -R a --template "{startswith(desc)}"
  hg: parse error: startswith expects two arguments
  [255]

  $ hg log -Gv -R a --template "{startswith('line', desc)}"
  @
  |
  o
  |
  o
  |
  o
  
  o
  |\
  | o
  | |
  o |
  |/
  o
  |
  o
  |
  o
  |
  o  line 1
     line 2

Test word function (including index out of bounds graceful failure)

  $ hg log -Gv -R a --template "{word('1', desc)}"
  @  add,
  |
  o
  |
  o
  |
  o
  
  o
  |\
  | o  head
  | |
  o |  branch
  |/
  o  user,
  |
  o  person
  |
  o  1
  |
  o  1
  

Test word third parameter used as splitter

  $ hg log -Gv -R a --template "{word('0', desc, 'o')}"
  @  M
  |
  o  future
  |
  o  third
  |
  o  sec
  
  o    merge
  |\
  | o  new head
  | |
  o |  new branch
  |/
  o  n
  |
  o  n
  |
  o
  |
  o  line 1
     line 2

Test word error messages for not enough and too many arguments

  $ hg log -Gv -R a --template "{word('0')}"
  hg: parse error: word expects two or three arguments, got 1
  [255]

  $ hg log -Gv -R a --template "{word('0', desc, 'o', 'h', 'b', 'o', 'y')}"
  hg: parse error: word expects two or three arguments, got 7
  [255]

Test word for integer literal

  $ hg log -R a --template "{word(2, desc)}\n" -r0
  line

Test word for invalid numbers

  $ hg log -Gv -R a --template "{word('a', desc)}"
  hg: parse error: word expects an integer index
  [255]

Test word for out of range

  $ hg log -R a --template "{word(10000, desc)}"
  $ hg log -R a --template "{word(-10000, desc)}"

Test indent and not adding to empty lines

  $ hg log -T "-----\n{indent(desc, '>> ', ' > ')}\n" -r 0:1 -R a
  -----
   > line 1
  >> line 2
  -----
   > other 1
  >> other 2
  
  >> other 3

Test with non-strings like dates

  $ hg log -T "{indent(date, '   ')}\n" -r 2:3 -R a
     1200000.00
     1300000.00

json filter should escape HTML tags so that the output can be embedded in hgweb:

  $ hg log -T "{'<[e-mail]>'|json}\n" -R a -l1
  "\[e-mail]\u003e"

Set up repository for non-ascii encoding tests:

  $ hg init nonascii
  $ cd nonascii
  $ "$PYTHON" <<EOF
  > open('latin1', 'wb').write(b'\xe9')
  > open('utf-8', 'wb').write(b'\xc3\xa9')
  > EOF
  $ HGENCODING=utf-8 hg branch -q `cat utf-8`
  $ HGENCODING=utf-8 hg ci -qAm "non-ascii branch: `cat utf-8`" utf-8

json filter should try round-trip conversion to utf-8:

  $ HGENCODING=ascii hg log -T "{branch|json}\n" -r0
  "\u00e9"
  $ HGENCODING=ascii hg log -T "{desc|json}\n" -r0
  "non-ascii branch: \u00e9"

json filter should take input as utf-8 if it was converted from utf-8:

  $ HGENCODING=latin-1 hg log -T "{branch|json}\n" -r0
  "\u00e9"
  $ HGENCODING=latin-1 hg log -T "{desc|json}\n" -r0
  "non-ascii branch: \u00e9"

json filter takes input as utf-8b:

  $ HGENCODING=ascii hg log -T "{'`cat utf-8`'|json}\n" -l1
  "\u00e9"
  $ HGENCODING=ascii hg log -T "{'`cat latin1`'|json}\n" -l1
  "\udce9"

utf8 filter:

  $ HGENCODING=ascii hg log -T "round-trip: {branch|utf8|hex}\n" -r0
  round-trip: c3a9
  $ HGENCODING=latin1 hg log -T "decoded: {'`cat latin1`'|utf8|hex}\n" -l1
  decoded: c3a9
  $ HGENCODING=ascii hg log -T "replaced: {'`cat latin1`'|utf8|hex}\n" -l1
  abort: decoding near * (glob)
  [255]
  $ hg log -T "coerced to string: {rev|utf8}\n" -r0
  coerced to string: 0

pad width:

  $ HGENCODING=utf-8 hg debugtemplate "{pad('`cat utf-8`', 2, '-')}\n"
  \xc3\xa9- (esc)

  $ cd ..