$ 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'

Test arithmetic operators have the right precedence:

  $ hg log -l 1 -T '{date(date, "%Y") + 5 * 10} {date(date, "%Y") - 2 * 3}\n'

  2020 1964

  $ hg log -l 1 -T '{date(date, "%Y") * 5 + 10} {date(date, "%Y") * 3 - 2}\n'

  9860 5908

Test division:

  $ hg debugtemplate -r0 -v '{5 / 2} {mod(5, 2)}\n'

  (template

    (/

      (integer '5')

      (integer '2'))

    (string ' ')

    (func

      (symbol 'mod')

      (list

        (integer '5')

        (integer '2')))

    (string '\n'))

  * keywords: 

  * functions: mod

  2 1

  $ hg debugtemplate -r0 -v '{5 / -2} {mod(5, -2)}\n'

  (template

    (/

      (integer '5')

      (negate

        (integer '2')))

    (string ' ')

    (func

      (symbol 'mod')

      (list

        (integer '5')

        (negate

          (integer '2'))))

    (string '\n'))

  * keywords: 

  * functions: mod

  -3 -1

  $ hg debugtemplate -r0 -v '{-5 / 2} {mod(-5, 2)}\n'

  (template

    (/

      (negate

        (integer '5'))

      (integer '2'))

    (string ' ')

    (func

      (symbol 'mod')

      (list

        (negate

          (integer '5'))

        (integer '2')))

    (string '\n'))

  * keywords: 

  * functions: mod

  -3 1

  $ hg debugtemplate -r0 -v '{-5 / -2} {mod(-5, -2)}\n'

  (template

    (/

      (negate

        (integer '5'))

      (negate

        (integer '2')))

    (string ' ')

    (func

      (symbol 'mod')

      (list

        (negate

          (integer '5'))

        (negate

          (integer '2'))))

    (string '\n'))

  * keywords: 

  * functions: mod

  2 -1

Filters bind closer than arithmetic:

  $ hg debugtemplate -r0 -v '{revset(".")|count - 1}\n'

  (template

    (-

      (|

        (func

          (symbol 'revset')

          (string '.'))

        (symbol 'count'))

      (integer '1'))

    (string '\n'))

  * keywords: 

  * functions: count, revset

  0

But negate binds closer still:

  $ hg debugtemplate -r0 -v '{1-3|stringify}\n'

  (template

    (-

      (integer '1')

      (|

        (integer '3')

        (symbol 'stringify')))

    (string '\n'))

  * keywords: 

  * functions: stringify

  hg: parse error: arithmetic only defined on integers

  [255]

  $ hg debugtemplate -r0 -v '{-3|stringify}\n'

  (template

    (|

      (negate

        (integer '3'))

      (symbol 'stringify'))

    (string '\n'))

  * keywords: 

  * functions: stringify

  -3

Filters bind as close as map operator:

  $ hg debugtemplate -r0 -v '{desc|splitlines % "{line}\n"}'

  (template

    (%

      (|

        (symbol 'desc')

        (symbol 'splitlines'))

      (template

        (symbol 'line')

        (string '\n'))))

  * keywords: desc, line

  * functions: splitlines

  line 1

  line 2

Keyword arguments:

  $ hg debugtemplate -r0 -v '{foo=bar|baz}'

  (template

    (keyvalue

      (symbol 'foo')

      (|

        (symbol 'bar')

        (symbol 'baz'))))

  * keywords: bar, foo

  * functions: baz

  hg: parse error: can't use a key-value pair in this context

  [255]

  $ hg debugtemplate '{pad("foo", width=10, left=true)}\n'

         foo

Call function which takes named arguments by filter syntax:

  $ hg debugtemplate '{" "|separate}'

  $ hg debugtemplate '{("not", "an", "argument", "list")|separate}'

  hg: parse error: unknown method 'list'

  [255]

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 log --template '{join(file_copies, ",\n")}\n' -r .

  fourth (second)

  $ hg log -T '{file_copies % "{source} -> {name}\n"}' -r .

  second -> fourth

  $ hg log -T '{rev} {ifcontains("fourth", file_copies, "t", "f")}\n' -r .:7

  8 t

  7 f

Internal resources shouldn't be exposed (issue5699):

  $ hg log -r. -T '{cache}{ctx}{repo}{revcache}{templ}{ui}'

Never crash on internal resource not available:

  $ hg --cwd .. debugtemplate '{"c0bebeef"|shortest}\n'

  abort: template resource not available: repo

  [255]

  $ hg config -T '{author}'

Quoting for ui.logtemplate

  $ hg tip --config "ui.logtemplate={rev}\n"

  8

  $ hg tip --config "ui.logtemplate='{rev}\n'"

  8

  $ hg tip --config 'ui.logtemplate="{rev}\n"'

  8

  $ hg tip --config 'ui.logtemplate=n{rev}\n'

  n8

Check that recursive reference does not fall into RuntimeError (issue4758):

 common mistake:

  $ cat << EOF > issue4758

  > changeset = '{changeset}\n'

  > EOF

  $ hg log --style ./issue4758

  abort: recursive reference 'changeset' in template

  [255]

 circular reference:

  $ cat << EOF > issue4758

  > changeset = '{foo}'

  > foo = '{changeset}'

  > EOF

  $ hg log --style ./issue4758

  abort: recursive reference 'foo' in template

  [255]

 buildmap() -> gettemplate(), where no thunk was made:

  $ cat << EOF > issue4758

  > changeset = '{files % changeset}\n'

  > EOF

  $ hg log --style ./issue4758

  abort: recursive reference 'changeset' in template

  [255]

 not a recursion if a keyword of the same name exists:

  $ cat << EOF > issue4758

  > changeset = '{tags % rev}'

  > rev = '{rev} {tag}\n'

  > EOF

  $ hg log --style ./issue4758 -r tip

  8 tip

  $ hg phase -r 5 --public

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

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

  $ echo a > a

  $ hg add a

  $ hg ci -m future

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"

Error on syntax:

  $ cat <<EOF > t

  > changeset = '{c}'

  > c = q

  > x = "f

  > EOF

  $ echo '[ui]' > .hg/hgrc

  $ echo 'style = t' >> .hg/hgrc

  $ hg log

  hg: parse error at t:3: unmatched quotes

  [255]

  $ hg log -T '{date'

  hg: parse error at 1: unterminated template expansion

  ({date

    ^ here)

  [255]

  $ hg log -T '{date(}'

  hg: parse error at 6: not a prefix: end

  ({date(}

         ^ here)

  [255]

  $ hg log -T '{date)}'

  hg: parse error at 5: invalid token

  ({date)}

        ^ here)

  [255]

  $ hg log -T '{date date}'

  hg: parse error at 6: invalid token

  ({date date}

         ^ here)

  [255]

  $ hg log -T '{}'

  hg: parse error at 1: not a prefix: end

  ({}

    ^ here)

  [255]

  $ hg debugtemplate -v '{()}'

  (template

    (group

      None))

  * keywords: 

  * functions: 

  hg: parse error: missing argument

  [255]

Behind the scenes, this would throw TypeError without intype=bytes

  $ hg log -l 3 --template '{date|obfuscate}\n'

  0.00

  0.00

  1577872860.00

Behind the scenes, this will throw a ValueError

  $ hg log -l 3 --template 'line: {desc|shortdate}\n'

  hg: parse error: invalid date: 'Modify, add, remove, rename'

  (template filter 'shortdate' is not compatible with keyword 'desc')

  [255]

Behind the scenes, this would throw AttributeError without intype=bytes

  $ hg log -l 3 --template 'line: {date|escape}\n'

  line: 0.00

  line: 0.00

  line: 1577872860.00

  $ hg log -l 3 --template 'line: {extras|localdate}\n'

  hg: parse error: localdate expects a date information

  [255]

Behind the scenes, this will throw ValueError

  $ hg tip --template '{author|email|date}\n'

  hg: parse error: date expects a date information

  [255]

  $ hg tip -T '{author|email|shortdate}\n'

  hg: parse error: invalid date: 'test'

  (template filter 'shortdate' is not compatible with keyword 'author')

  [255]

  $ hg tip -T '{get(extras, "branch")|shortdate}\n'

  hg: parse error: invalid date: 'default'

  (incompatible use of template filter 'shortdate')

  [255]

Error in nested template:

  $ hg log -T '{"date'

  hg: parse error at 2: unterminated string

  ({"date

     ^ here)

  [255]

  $ hg log -T '{"foo{date|?}"}'

  hg: parse error at 11: syntax error

  ({"foo{date|?}"}

              ^ here)

  [255]

Thrown an error if a template function doesn't exist

  $ hg tip --template '{foo()}\n'