view tests/test-alias.t @ 32697:19b9fc40cc51

revlog: skeleton support for version 2 revlogs

There are a number of improvements we want to make to revlogs
that will require a new version - version 2. It is unclear what the
full set of improvements will be or when we'll be done with them.
What I do know is that the process will likely take longer than a
single release, will require input from various stakeholders to
evaluate changes, and will have many contentious debates and
bikeshedding.

It is unrealistic to develop revlog version 2 up front: there
are just too many uncertainties that we won't know until things
are implemented and experiments are run. Some changes will also
be invasive and prone to bit rot, so sitting on dozens of patches
is not practical.

This commit introduces skeleton support for version 2 revlogs in
a way that is flexible and not bound by backwards compatibility
concerns.

An experimental repo requirement for denoting revlog v2 has been
added. The requirement string has a sub-version component to it.
This will allow us to declare multiple requirements in the course
of developing revlog v2. Whenever we change the in-development
revlog v2 format, we can tweak the string, creating a new
requirement and locking out old clients. This will allow us to
make as many backwards incompatible changes and experiments to
revlog v2 as we want. In other words, we can land code and make
meaningful progress towards revlog v2 while still maintaining
extreme format flexibility up until the point we freeze the
format and remove the experimental labels.

To enable the new repo requirement, you must supply an experimental
and undocumented config option. But not just any boolean flag
will do: you need to explicitly use a value that no sane person
should ever type. This is an additional guard against enabling
revlog v2 on an installation it shouldn't be enabled on. The
specific scenario I'm trying to prevent is say a user with a
4.4 client with a frozen format enabling the option but then
downgrading to 4.3 and accidentally creating repos with an
outdated and unsupported repo format. Requiring a "challenge"
string should prevent this.

Because the format is not yet finalized and I don't want to take
any chances, revlog v2's version is currently 0xDEAD. I figure
squatting on a value we're likely never to use as an actual revlog
version to mean "internal testing only" is acceptable. And
"dead" is easily recognized as something meaningful.

There is a bunch of cleanup that is needed before work on revlog
v2 begins in earnest. I plan on doing that work once this patch
is accepted and we're comfortable with the idea of starting down
this path.

  $ HGFOO=BAR; export HGFOO
  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > # should clobber ci but not commit (issue2993)
  > ci = version
  > myinit = init
  > mycommit = commit
  > optionalrepo = showconfig alias.myinit
  > cleanstatus = status -c
  > unknown = bargle
  > ambiguous = s
  > recursive = recursive
  > disabled = email
  > nodefinition =
  > noclosingquotation = '
  > no--cwd = status --cwd elsewhere
  > no-R = status -R elsewhere
  > no--repo = status --repo elsewhere
  > no--repository = status --repository elsewhere
  > no--config = status --config a.config=1
  > mylog = log
  > lognull = log -r null
  > shortlog = log --template '{rev} {node|short} | {date|isodate}\n'
  > positional = log --template '{\$2} {\$1} | {date|isodate}\n'
  > dln = lognull --debug
  > nousage = rollback
  > put = export -r 0 -o "\$FOO/%R.diff"
  > blank = !printf '\n'
  > self = !printf '\$0\n'
  > echoall = !printf '\$@\n'
  > echo1 = !printf '\$1\n'
  > echo2 = !printf '\$2\n'
  > echo13 = !printf '\$1 \$3\n'
  > echotokens = !printf "%s\n" "\$@"
  > count = !hg log -r "\$@" --template=. | wc -c | sed -e 's/ //g'
  > mcount = !hg log \$@ --template=. | wc -c | sed -e 's/ //g'
  > rt = root
  > tglog = log -G --template "{rev}:{node|short}: '{desc}' {branches}\n"
  > idalias = id
  > idaliaslong = id
  > idaliasshell = !echo test
  > parentsshell1 = !echo one
  > parentsshell2 = !echo two
  > escaped1 = !printf 'test\$\$test\n'
  > escaped2 = !sh -c 'echo "HGFOO is \$\$HGFOO"'
  > escaped3 = !sh -c 'echo "\$1 is \$\$\$1"'
  > escaped4 = !printf '\$\$0 \$\$@\n'
  > exit1 = !sh -c 'exit 1'
  > 
  > [defaults]
  > mylog = -q
  > lognull = -q
  > log = -v
  > EOF


basic

  $ hg myinit alias


unknown

  $ hg unknown
  abort: alias 'unknown' resolves to unknown command 'bargle'
  [255]
  $ hg help unknown
  alias 'unknown' resolves to unknown command 'bargle'


ambiguous

  $ hg ambiguous
  abort: alias 'ambiguous' resolves to ambiguous command 's'
  [255]
  $ hg help ambiguous
  alias 'ambiguous' resolves to ambiguous command 's'


recursive

  $ hg recursive
  abort: alias 'recursive' resolves to unknown command 'recursive'
  [255]
  $ hg help recursive
  alias 'recursive' resolves to unknown command 'recursive'


disabled

  $ hg disabled
  abort: alias 'disabled' resolves to unknown command 'email'
  ('email' is provided by 'patchbomb' extension)
  [255]
  $ hg help disabled
  alias 'disabled' resolves to unknown command 'email'
  
  'email' is provided by the following extension:
  
      patchbomb     command to send changesets as (a series of) patch emails
  
  (use 'hg help extensions' for information on enabling extensions)


no definition

  $ hg nodef
  abort: no definition for alias 'nodefinition'
  [255]
  $ hg help nodef
  no definition for alias 'nodefinition'


no closing quotation

  $ hg noclosing
  abort: error in definition for alias 'noclosingquotation': No closing quotation
  [255]
  $ hg help noclosing
  error in definition for alias 'noclosingquotation': No closing quotation


invalid options

  $ hg no--cwd
  abort: error in definition for alias 'no--cwd': --cwd may only be given on the command line
  [255]
  $ hg help no--cwd
  error in definition for alias 'no--cwd': --cwd may only be given on the
  command line
  $ hg no-R
  abort: error in definition for alias 'no-R': -R may only be given on the command line
  [255]
  $ hg help no-R
  error in definition for alias 'no-R': -R may only be given on the command line
  $ hg no--repo
  abort: error in definition for alias 'no--repo': --repo may only be given on the command line
  [255]
  $ hg help no--repo
  error in definition for alias 'no--repo': --repo may only be given on the
  command line
  $ hg no--repository
  abort: error in definition for alias 'no--repository': --repository may only be given on the command line
  [255]
  $ hg help no--repository
  error in definition for alias 'no--repository': --repository may only be given
  on the command line
  $ hg no--config
  abort: error in definition for alias 'no--config': --config may only be given on the command line
  [255]

optional repository

#if no-outer-repo
  $ hg optionalrepo
  init
#endif
  $ cd alias
  $ cat > .hg/hgrc <<EOF
  > [alias]
  > myinit = init -q
  > EOF
  $ hg optionalrepo
  init -q

no usage

  $ hg nousage
  no rollback information available
  [1]

  $ echo foo > foo
  $ hg commit -Amfoo
  adding foo

infer repository

  $ cd ..

#if no-outer-repo
  $ hg shortlog alias/foo
  0 e63c23eaa88a | 1970-01-01 00:00 +0000
#endif

  $ cd alias

with opts

  $ hg cleanst
  C foo


with opts and whitespace

  $ hg shortlog
  0 e63c23eaa88a | 1970-01-01 00:00 +0000

positional arguments

  $ hg positional
  abort: too few arguments for command alias
  [255]
  $ hg positional a
  abort: too few arguments for command alias
  [255]
  $ hg positional 'node|short' rev
  0 e63c23eaa88a | 1970-01-01 00:00 +0000

interaction with defaults

  $ hg mylog
  0:e63c23eaa88a
  $ hg lognull
  -1:000000000000


properly recursive

  $ hg dln
  changeset:   -1:0000000000000000000000000000000000000000
  phase:       public
  parent:      -1:0000000000000000000000000000000000000000
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    -1:0000000000000000000000000000000000000000
  user:        
  date:        Thu Jan 01 00:00:00 1970 +0000
  extra:       branch=default
  


path expanding

  $ FOO=`pwd` hg put
  $ cat 0.diff
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID e63c23eaa88ae77967edcf4ea194d31167c478b0
  # Parent  0000000000000000000000000000000000000000
  foo
  
  diff -r 000000000000 -r e63c23eaa88a foo
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/foo	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +foo


simple shell aliases

  $ hg blank
  
  $ hg blank foo
  
  $ hg self
  self
  $ hg echoall
  
  $ hg echoall foo
  foo
  $ hg echoall 'test $2' foo
  test $2 foo
  $ hg echoall 'test $@' foo '$@'
  test $@ foo $@
  $ hg echoall 'test "$@"' foo '"$@"'
  test "$@" foo "$@"
  $ hg echo1 foo bar baz
  foo
  $ hg echo2 foo bar baz
  bar
  $ hg echo13 foo bar baz test
  foo baz
  $ hg echo2 foo
  
  $ hg echotokens
  
  $ hg echotokens foo 'bar $1 baz'
  foo
  bar $1 baz
  $ hg echotokens 'test $2' foo
  test $2
  foo
  $ hg echotokens 'test $@' foo '$@'
  test $@
  foo
  $@
  $ hg echotokens 'test "$@"' foo '"$@"'
  test "$@"
  foo
  "$@"
  $ echo bar > bar
  $ hg commit -qA -m bar
  $ hg count .
  1
  $ hg count 'branch(default)'
  2
  $ hg mcount -r '"branch(default)"'
  2

  $ hg tglog
  @  1:042423737847: 'bar'
  |
  o  0:e63c23eaa88a: 'foo'
  


shadowing

  $ hg i
  hg: command 'i' is ambiguous:
      idalias idaliaslong idaliasshell identify import incoming init
  [255]
  $ hg id
  042423737847 tip
  $ hg ida
  hg: command 'ida' is ambiguous:
      idalias idaliaslong idaliasshell
  [255]
  $ hg idalias
  042423737847 tip
  $ hg idaliasl
  042423737847 tip
  $ hg idaliass
  test
  $ hg parentsshell
  hg: command 'parentsshell' is ambiguous:
      parentsshell1 parentsshell2
  [255]
  $ hg parentsshell1
  one
  $ hg parentsshell2
  two


shell aliases with global options

  $ hg init sub
  $ cd sub
  $ hg count 'branch(default)'
  abort: unknown revision 'default'!
  0
  $ hg -v count 'branch(default)'
  abort: unknown revision 'default'!
  0
  $ hg -R .. count 'branch(default)'
  abort: unknown revision 'default'!
  0
  $ hg --cwd .. count 'branch(default)'
  2
  $ hg echoall --cwd ..
  


repo specific shell aliases

  $ cat >> .hg/hgrc <<EOF
  > [alias]
  > subalias = !echo sub
  > EOF
  $ cat >> ../.hg/hgrc <<EOF
  > [alias]
  > mainalias = !echo main
  > EOF


shell alias defined in current repo

  $ hg subalias
  sub
  $ hg --cwd .. subalias > /dev/null
  hg: unknown command 'subalias'
  (did you mean idalias?)
  [255]
  $ hg -R .. subalias > /dev/null
  hg: unknown command 'subalias'
  (did you mean idalias?)
  [255]


shell alias defined in other repo

  $ hg mainalias > /dev/null
  hg: unknown command 'mainalias'
  (did you mean idalias?)
  [255]
  $ hg -R .. mainalias
  main
  $ hg --cwd .. mainalias
  main

typos get useful suggestions
  $ hg --cwd .. manalias
  hg: unknown command 'manalias'
  (did you mean one of idalias, mainalias, manifest?)
  [255]

shell aliases with escaped $ chars

  $ hg escaped1
  test$test
  $ hg escaped2
  HGFOO is BAR
  $ hg escaped3 HGFOO
  HGFOO is BAR
  $ hg escaped4 test
  $0 $@

abbreviated name, which matches against both shell alias and the
command provided extension, should be aborted.

  $ cat >> .hg/hgrc <<EOF
  > [extensions]
  > hgext.rebase =
  > EOF
#if windows
  $ cat >> .hg/hgrc <<EOF
  > [alias]
  > rebate = !echo this is %HG_ARGS%
  > EOF
#else
  $ cat >> .hg/hgrc <<EOF
  > [alias]
  > rebate = !echo this is \$HG_ARGS
  > EOF
#endif
  $ hg reba
  hg: command 'reba' is ambiguous:
      rebase rebate
  [255]
  $ hg rebat
  this is rebate
  $ hg rebat --foo-bar
  this is rebate --foo-bar

invalid arguments

  $ hg rt foo
  hg rt: invalid arguments
  hg rt
  
  alias for: hg root
  
  (use 'hg rt -h' to show more help)
  [255]

invalid global arguments for normal commands, aliases, and shell aliases

  $ hg --invalid root
  hg: option --invalid not recognized
  Mercurial Distributed SCM
  
  basic commands:
  
   add           add the specified files on the next commit
   annotate      show changeset information by line for each file
   clone         make a copy of an existing repository
   commit        commit the specified files or all outstanding changes
   diff          diff repository (or selected files)
   export        dump the header and diffs for one or more changesets
   forget        forget the specified files on the next commit
   init          create a new repository in the given directory
   log           show revision history of entire repository or files
   merge         merge another revision into working directory
   pull          pull changes from the specified source
   push          push changes to the specified destination
   remove        remove the specified files on the next commit
   serve         start stand-alone webserver
   status        show changed files in the working directory
   summary       summarize working directory state
   update        update working directory (or switch revisions)
  
  (use 'hg help' for the full list of commands or 'hg -v' for details)
  [255]
  $ hg --invalid mylog
  hg: option --invalid not recognized
  Mercurial Distributed SCM
  
  basic commands:
  
   add           add the specified files on the next commit
   annotate      show changeset information by line for each file
   clone         make a copy of an existing repository
   commit        commit the specified files or all outstanding changes
   diff          diff repository (or selected files)
   export        dump the header and diffs for one or more changesets
   forget        forget the specified files on the next commit
   init          create a new repository in the given directory
   log           show revision history of entire repository or files
   merge         merge another revision into working directory
   pull          pull changes from the specified source
   push          push changes to the specified destination
   remove        remove the specified files on the next commit
   serve         start stand-alone webserver
   status        show changed files in the working directory
   summary       summarize working directory state
   update        update working directory (or switch revisions)
  
  (use 'hg help' for the full list of commands or 'hg -v' for details)
  [255]
  $ hg --invalid blank
  hg: option --invalid not recognized
  Mercurial Distributed SCM
  
  basic commands:
  
   add           add the specified files on the next commit
   annotate      show changeset information by line for each file
   clone         make a copy of an existing repository
   commit        commit the specified files or all outstanding changes
   diff          diff repository (or selected files)
   export        dump the header and diffs for one or more changesets
   forget        forget the specified files on the next commit
   init          create a new repository in the given directory
   log           show revision history of entire repository or files
   merge         merge another revision into working directory
   pull          pull changes from the specified source
   push          push changes to the specified destination
   remove        remove the specified files on the next commit
   serve         start stand-alone webserver
   status        show changed files in the working directory
   summary       summarize working directory state
   update        update working directory (or switch revisions)
  
  (use 'hg help' for the full list of commands or 'hg -v' for details)
  [255]

environment variable changes in alias commands

  $ cat > $TESTTMP/setcount.py <<EOF
  > import os
  > def uisetup(ui):
  >     os.environ['COUNT'] = '2'
  > EOF

  $ cat >> $HGRCPATH <<'EOF'
  > [extensions]
  > setcount = $TESTTMP/setcount.py
  > [alias]
  > showcount = log -T "$COUNT\n" -r .
  > EOF

  $ COUNT=1 hg showcount
  2

This should show id:

  $ hg --config alias.log='id' log
  000000000000 tip

This shouldn't:

  $ hg --config alias.log='id' history

  $ cd ../..

return code of command and shell aliases:

  $ hg mycommit -R alias
  nothing changed
  [1]
  $ hg exit1
  [1]

#if no-outer-repo
  $ hg root
  abort: no repository found in '$TESTTMP' (.hg not found)!
  [255]
  $ hg --config alias.hgroot='!hg root' hgroot
  abort: no repository found in '$TESTTMP' (.hg not found)!
  [255]
#endif