$ cat >> $HGRCPATH << EOF

  > [command-templates]

  > log="{rev}:{node|short} {desc} [{tags}]\n"

  > EOF

  $ hg init legacy-lookup

  $ cd legacy-lookup

  $ echo a > a

  $ hg add a

  $ hg commit -m 'first'

  $ echo aa > a

  $ hg commit -m 'second'

  $ hg log -G

  @  1:43114e71eddd second [tip]

  |

  o  0:a87874c6ec31 first []

Create a tag that looks like a revset

  $ hg tag 'rev(0)'

  $ hg log -G

  @  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd [tip]

  |

  o  1:43114e71eddd second [rev(0)]

  |

  o  0:a87874c6ec31 first []

See how various things are resolved

-----------------------------------

Revision numbers

  $ hg log -r '0'

  0:a87874c6ec31 first []

  $ hg log -r '1'

  1:43114e71eddd second [rev(0)]

"rev(x)" form (the one conflicting with the tags)

(resolved as a label)

  $ hg log -r 'rev(0)'

  1:43114e71eddd second [rev(0)]

  $ hg log -r 'rev(1)'

  1:43114e71eddd second [rev(0)]

same within a simple revspec

(still resolved as the label)

  $ hg log -r ':rev(0)'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  $ hg log -r 'rev(0):'

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd [tip]

within a more advances revset

(still resolved as the label)

  $ hg log -r 'rev(0) and branch(default)'

  0:a87874c6ec31 first []

with explicit revset resolution

(still resolved as the label)

  $ hg log -r 'revset(rev(0))'

  0:a87874c6ec31 first []

some of the above with quote to force its resolution as a label

  $ hg log -r ':"rev(0)"'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  $ hg log -r '"rev(0)":'

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd [tip]

  $ hg log -r '"rev(0)" and branch(default)'

  1:43114e71eddd second [rev(0)]

confusing bits within parents

  $ hg log -r '(rev(0))'

  0:a87874c6ec31 first []

  $ hg log -r '( rev(0))'

  0:a87874c6ec31 first []

  $ hg log -r '("rev(0)")'

  1:43114e71eddd second [rev(0)]

Test label with quote in them.

  $ hg tag '"foo"'

  $ hg log -r '"foo"'

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  $ hg log -r '("foo")'

  abort: unknown revision 'foo'

  [10]

  $ hg log -r 'revset("foo")'

  abort: unknown revision 'foo'

  [10]

  $ hg log -r '("\"foo\"")'

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  $ hg log -r 'revset("\"foo\"")'

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

Test label with dash in them.

  $ hg tag 'foo-bar'

  $ hg log -r 'foo-bar'

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  $ hg log -r '(foo-bar)'

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  $ hg log -r '"foo-bar"'

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  $ hg log -r '("foo-bar")'

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

Test label with + in them.

  $ hg tag 'foo+bar'

  $ hg log -r 'foo+bar'

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  $ hg log -r '(foo+bar)'

  abort: unknown revision 'foo'

  [10]

  $ hg log -r 'revset(foo+bar)'

  abort: unknown revision 'foo'

  [10]

  $ hg log -r '"foo+bar"'

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  $ hg log -r '("foo+bar")'

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

Test tag with numeric version number.

  $ hg tag '1.2'

  $ hg log -r '1.2'

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  $ hg log -r '(1.2)'

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  $ hg log -r 'revset(1.2)'

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  $ hg log -r '"1.2"'

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  $ hg log -r '("1.2")'

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  $ hg log -r '::"1.2"'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  $ hg log -r '::1.2'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

Test tag with parenthesis (but not a valid revset)

  $ hg tag 'release_4.1(candidate1)'

  $ hg log -r 'release_4.1(candidate1)'

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  $ hg log -r '(release_4.1(candidate1))'

  hg: parse error: unknown identifier: release_4.1

  [10]

  $ hg log -r 'revset(release_4.1(candidate1))'

  hg: parse error: unknown identifier: release_4.1

  [10]

  $ hg log -r '"release_4.1(candidate1)"'

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  $ hg log -r '("release_4.1(candidate1)")'

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  $ hg log -r '::"release_4.1(candidate1)"'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  $ hg log -r '::release_4.1(candidate1)'

  hg: parse error: unknown identifier: release_4.1

  [10]

Test tag with parenthesis and other function like char

  $ hg tag 'release_4.1(arch=x86,arm)'

  $ hg log -r 'release_4.1(arch=x86,arm)'

  7:b29b25d7d687 Added tag release_4.1(candidate1) for changeset db72e24fe069 [release_4.1(arch=x86,arm)]

  $ hg log -r '(release_4.1(arch=x86,arm))'

  hg: parse error: unknown identifier: release_4.1

  [10]

  $ hg log -r 'revset(release_4.1(arch=x86,arm))'

  hg: parse error: unknown identifier: release_4.1

  [10]

  $ hg log -r '"release_4.1(arch=x86,arm)"'

  7:b29b25d7d687 Added tag release_4.1(candidate1) for changeset db72e24fe069 [release_4.1(arch=x86,arm)]

  $ hg log -r '("release_4.1(arch=x86,arm)")'

  7:b29b25d7d687 Added tag release_4.1(candidate1) for changeset db72e24fe069 [release_4.1(arch=x86,arm)]

  $ hg log -r '::"release_4.1(arch=x86,arm)"'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  7:b29b25d7d687 Added tag release_4.1(candidate1) for changeset db72e24fe069 [release_4.1(arch=x86,arm)]

  $ hg log -r '::release_4.1(arch=x86,arm)'

  hg: parse error: unknown identifier: release_4.1

  [10]

Test tag conflicting with revset function

  $ hg tag 'secret(team=foo,project=bar)'

  $ hg log -r 'secret(team=foo,project=bar)'

  8:6b2e2d4ea455 Added tag release_4.1(arch=x86,arm) for changeset b29b25d7d687 [secret(team=foo,project=bar)]

  $ hg log -r '(secret(team=foo,project=bar))'

  hg: parse error: secret takes no arguments

  [10]

  $ hg log -r 'revset(secret(team=foo,project=bar))'

  hg: parse error: secret takes no arguments

  [10]

  $ hg log -r '"secret(team=foo,project=bar)"'

  8:6b2e2d4ea455 Added tag release_4.1(arch=x86,arm) for changeset b29b25d7d687 [secret(team=foo,project=bar)]

  $ hg log -r '("secret(team=foo,project=bar)")'

  8:6b2e2d4ea455 Added tag release_4.1(arch=x86,arm) for changeset b29b25d7d687 [secret(team=foo,project=bar)]

  $ hg log -r '::"secret(team=foo,project=bar)"'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  7:b29b25d7d687 Added tag release_4.1(candidate1) for changeset db72e24fe069 [release_4.1(arch=x86,arm)]

  8:6b2e2d4ea455 Added tag release_4.1(arch=x86,arm) for changeset b29b25d7d687 [secret(team=foo,project=bar)]

  $ hg log -r '::secret(team=foo,project=bar)'

  hg: parse error: secret takes no arguments

  [10]

Test tag with space

  $ hg tag 'my little version'

  $ hg log -r 'my little version'

  9:269192bf8fc3 Added tag secret(team=foo,project=bar) for changeset 6b2e2d4ea455 [my little version]

  $ hg log -r '(my little version)'

  hg: parse error at 4: unexpected token: symbol

  ((my little version)

       ^ here)

  [10]

  $ hg log -r 'revset(my little version)'

  hg: parse error at 10: unexpected token: symbol

  (revset(my little version)

             ^ here)

  [10]

  $ hg log -r '"my little version"'

  9:269192bf8fc3 Added tag secret(team=foo,project=bar) for changeset 6b2e2d4ea455 [my little version]

  $ hg log -r '("my little version")'

  9:269192bf8fc3 Added tag secret(team=foo,project=bar) for changeset 6b2e2d4ea455 [my little version]

  $ hg log -r '::"my little version"'

  0:a87874c6ec31 first []

  1:43114e71eddd second [rev(0)]

  2:fb616635b18f Added tag rev(0) for changeset 43114e71eddd ["foo"]

  3:a50aae922707 Added tag "foo" for changeset fb616635b18f [foo-bar]

  4:bbf52b87b370 Added tag foo-bar for changeset a50aae922707 [foo+bar]

  5:ff42fde8edbb Added tag foo+bar for changeset bbf52b87b370 [1.2]

  6:db72e24fe069 Added tag 1.2 for changeset ff42fde8edbb [release_4.1(candidate1)]

  7:b29b25d7d687 Added tag release_4.1(candidate1) for changeset db72e24fe069 [release_4.1(arch=x86,arm)]

  8:6b2e2d4ea455 Added tag release_4.1(arch=x86,arm) for changeset b29b25d7d687 [secret(team=foo,project=bar)]

  9:269192bf8fc3 Added tag secret(team=foo,project=bar) for changeset 6b2e2d4ea455 [my little version]

  $ hg log -r '::my little version'

  hg: parse error at 5: invalid token

  (::my little version

        ^ here)

  [10]