view tests/test-tag.t @ 12938:bf826c0b9537 stable

opener: check hardlink count reporting (issue1866)

The Linux CIFS kernel driver (even in 2.6.36) suffers from a hardlink
count blindness bug (lstat() returning 1 in st_nlink when it is expected
to return >1), which causes repository corruption if Mercurial running
on Linux pushes or commits to a hardlinked repository stored on a Windows
share, if that share is mounted using the CIFS driver.

This patch works around issue1866 and improves the workaround done in
50523b4407f6 to fix issue761, by teaching the opener to lazily execute a
runtime check (new function checknlink) to see if the hardlink count
reported by nlinks() can be trusted.

Since nlinks() is also known to return varying count values (1 or >1)
depending on whether the file is open or not and depending on what client
and server software combination is being used for accessing and serving
the Windows share, we deliberately open the file before calling nlinks() in
order to have a stable precondition. Trying to depend on the precondition
"file closed" would be fragile, as the file could have been opened very
easily somewhere else in the program.

  $ hg init test
  $ cd test

  $ echo a > a
  $ hg add a
  $ hg commit -m "test"
  $ hg history
  changeset:   0:acb14030fe0a
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  

  $ hg tag ' '
  abort: tag names cannot consist entirely of whitespace
  [255]

  $ hg tag "bleah"
  $ hg history
  changeset:   1:d4f0d2909abc
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Added tag bleah for changeset acb14030fe0a
  
  changeset:   0:acb14030fe0a
  tag:         bleah
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  

  $ echo foo >> .hgtags
  $ hg tag "bleah2"
  abort: working copy of .hgtags is changed (please commit .hgtags manually)
  [255]

  $ hg revert .hgtags
  $ hg tag -r 0 x y z y y z
  abort: tag names must be unique
  [255]
  $ hg tag tap nada dot tip null .
  abort: the name 'tip' is reserved
  [255]
  $ hg tag "bleah"
  abort: tag 'bleah' already exists (use -f to force)
  [255]
  $ hg tag "blecch" "bleah"
  abort: tag 'bleah' already exists (use -f to force)
  [255]

  $ hg tag --remove "blecch"
  abort: tag 'blecch' does not exist
  [255]
  $ hg tag --remove "bleah" "blecch" "blough"
  abort: tag 'blecch' does not exist
  [255]

  $ hg tag -r 0 "bleah0"
  $ hg tag -l -r 1 "bleah1"
  $ hg tag gack gawk gorp
  $ hg tag -f gack
  $ hg tag --remove gack gorp

  $ cat .hgtags
  acb14030fe0a21b60322c440ad2d20cf7685a376 bleah
  acb14030fe0a21b60322c440ad2d20cf7685a376 bleah0
  336fccc858a4eb69609a291105009e484a6b6b8d gack
  336fccc858a4eb69609a291105009e484a6b6b8d gawk
  336fccc858a4eb69609a291105009e484a6b6b8d gorp
  336fccc858a4eb69609a291105009e484a6b6b8d gack
  799667b6f2d9b957f73fa644a918c2df22bab58f gack
  799667b6f2d9b957f73fa644a918c2df22bab58f gack
  0000000000000000000000000000000000000000 gack
  336fccc858a4eb69609a291105009e484a6b6b8d gorp
  0000000000000000000000000000000000000000 gorp
  $ cat .hg/localtags
  d4f0d2909abc9290e2773c08837d70c1794e3f5a bleah1

  $ hg update 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg tag "foobar"
  $ cat .hgtags
  acb14030fe0a21b60322c440ad2d20cf7685a376 foobar
  $ cat .hg/localtags
  d4f0d2909abc9290e2773c08837d70c1794e3f5a bleah1

  $ hg tag -l 'xx
  > newline'
  abort: '\n' cannot be used in a tag name
  [255]
  $ hg tag -l 'xx:xx'
  abort: ':' cannot be used in a tag name
  [255]

cloning local tags

  $ cd ..
  $ hg -R test log -r0:5
  changeset:   0:acb14030fe0a
  tag:         bleah
  tag:         bleah0
  tag:         foobar
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  
  changeset:   1:d4f0d2909abc
  tag:         bleah1
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Added tag bleah for changeset acb14030fe0a
  
  changeset:   2:336fccc858a4
  tag:         gawk
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Added tag bleah0 for changeset acb14030fe0a
  
  changeset:   3:799667b6f2d9
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Added tag gack, gawk, gorp for changeset 336fccc858a4
  
  changeset:   4:154eeb7c0138
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Added tag gack for changeset 799667b6f2d9
  
  changeset:   5:b4bb47aaff09
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Removed tag gack, gorp
  
  $ hg clone -q -rbleah1 test test1
  $ hg -R test1 parents --style=compact
  1[tip]   d4f0d2909abc   1970-01-01 00:00 +0000   test
    Added tag bleah for changeset acb14030fe0a
  
  $ hg clone -q -r5 test#bleah1 test2
  $ hg -R test2 parents --style=compact
  5[tip]   b4bb47aaff09   1970-01-01 00:00 +0000   test
    Removed tag gack, gorp
  
  $ hg clone -q -U test#bleah1 test3
  $ hg -R test3 parents --style=compact

  $ cd test

Issue601: hg tag doesn't do the right thing if .hgtags or localtags
doesn't end with EOL

  $ python << EOF
  > f = file('.hg/localtags'); last = f.readlines()[-1][:-1]; f.close()
  > f = file('.hg/localtags', 'w'); f.write(last); f.close()
  > EOF
  $ cat .hg/localtags; echo
  d4f0d2909abc9290e2773c08837d70c1794e3f5a bleah1
  $ hg tag -l localnewline
  $ cat .hg/localtags; echo
  d4f0d2909abc9290e2773c08837d70c1794e3f5a bleah1
  c2899151f4e76890c602a2597a650a72666681bf localnewline
  

  $ python << EOF
  > f = file('.hgtags'); last = f.readlines()[-1][:-1]; f.close()
  > f = file('.hgtags', 'w'); f.write(last); f.close()
  > EOF
  $ hg ci -m'broken manual edit of .hgtags'
  $ cat .hgtags; echo
  acb14030fe0a21b60322c440ad2d20cf7685a376 foobar
  $ hg tag newline
  $ cat .hgtags; echo
  acb14030fe0a21b60322c440ad2d20cf7685a376 foobar
  a0eea09de1eeec777b46f2085260a373b2fbc293 newline
  

tag and branch using same name

  $ hg branch tag-and-branch-same-name
  marked working directory as branch tag-and-branch-same-name
  $ hg ci -m"discouraged"
  $ hg tag tag-and-branch-same-name
  warning: tag tag-and-branch-same-name conflicts with existing branch name

test custom commit messages

  $ cat > editor << '__EOF__'
  > #!/bin/sh
  > echo "custom tag message" > "$1"
  > echo "second line" >> "$1"
  > __EOF__
  $ chmod +x editor
  $ HGEDITOR="'`pwd`'"/editor hg tag custom-tag -e
  $ hg log -l1 --template "{desc}\n"
  custom tag message
  second line