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#
# CHANGES.pod
#
# A reverse-chronological order list of changes to the Perl Shell.
#

=head1 NAME

Change log for B<psh> - The Perl SHell

=head1 DESCRIPTION

A reverse-chronological ordered list of changes

=cut

# This is so pod2man won't complain ;-)


###############################################################################
###############################################################################
##
## CVS
##
###############################################################################
###############################################################################

=head1 1.8 [2003-01-18]

=head2 Fixes

=over 4

=item *

Removed module-specific VERSION variables (some were based on their CVS
revision numbers.

=back


=head1 1.7 [2003-01-16]

=head2 Fixes

=over 4

=item *

Incremented version so $Psh::VERSION > 1.67, which was the version for that
module in the 0.009 release (because at that time, version was set according
to the CVS revision, rather than to match the release). This should (finally)
make CPAN happy.

=back


=head1 1.1 [2003-01-16]

=head2 Fixes

=over 4

=item *

Put VERSION back in Psh.pm instead of in the main psh script.

=item *

Some copyright updates.

=back


=head1 1.0 [2003-01-02]

=head2 New Features

=over 4

=item *

The new B<if> builtin allows mixing evaluation strategies. Example:

   if ( -r 'README' ) {
       if ( grep -q "Perl Shell" README ) {
           print "OK\n";
       }
   }

=item *

New B<forfile> builtin:

   forfile *.txt less $_

is equivalent to

   for i in *; do less $i; done

in (ba)sh

=item *

New redirection and piping syntax - incompatible to the old sh-like
syntax. The new syntax is allowing many nice things like redirecting
to opened Perl filehandles ( command >[=FILEHANDLE])

=item *

Perl shell now integrates with Perl backticks, you you can finally do
things like:

   $foo=`help strategy`
   chomp $foo
   if ( $foo =~ /.../ ) ...

=item * 

New B<-F> command line switch to disable processing of any pshrc files

=item *

New default strategy B<perl> - send everything after 'p!' unparsed to the
perl interpreter (might be used later on for a special rc file compiler)

=item *

New strategy B<darwin_apps> - tries to locate Darwin/Mac OS X
Appbundle programs and execute them.

=item *

Alias expansion is escapable using backslash:
  alias ls='ls --color'
  \ls

=item *

The sequence ESC-h is now per default bound to the new readline function
"run-help" which will display any help about the current input line it
can find. (works only in Term::ReadLine::Gnu)

=item *

It's now possible to bind simple commands with C<&&> and C<||> like
in a normal shell.

=item *

Global precommand modifiers: You can put B<noglob>, B<noalias>, B<noexpand> in
front of any command to disable the specified expansion or all of them.

=item *

Prompt themes - see the B<theme> builtin.

=item *

Completion modules - allows large sets of predefined completion rules
without loading them all at startup time - see the B<complete> builtin.

=back

=head2 New/enhanced builtins

=over 4

=item * B<modules>

=item * B<ulimit>

=item * B<printenv>

=item * B<hash>

=item * B<rehash>

=item * B<jobs> has new flags B<-rsp>

=item * B<fc> has protection against endless loops and a more sensible range parsing

=item * B<which> largely extended with flags B<-mrav>

=item * B<package> for switching Perl namespace

=item *

Added a sudo builtin which adds some capabilities to the sudo command.
(Michael Graham)

=back

=head2 Fixes

=over 4

=item *

Major startup speedup

=item *

There was a small, not very often occurring bug related to the usage of
Env::Array, due to a typo

=item *

Handling of ~ for username expansion should be bug-free now

=item *

The help builtin sometimes returned the wrong help (e.g. C<help set>
returned the help of setenv)

=item *

The parser parsed '&&' as if the user entered '& &&'.

=item *

C<@_> and C<$_> are saved between input lines.

=item *

If you're redirecting perl code, a new fork will be created. You'll therefore
lose all variable changes etc. in redirected perl code. That's not as bad as
it seems, as before the change, psh segfaulted most of the time you tried
redirecting perl code.

=item *

Completion was a improved a bit - completions of filenames like "foo\ bar"
(where backslash is used to escape whitespace) works a little bit better
now. A complete rewrite of Completion is currently scheduled for 0.11

=back

=head2 Cleanups

=over 4

=item *

The package Psh::Job is now in the same file with Psh::Joblist. Psh::Job
stays an object while Psh::Joblist was converted to a procedural interface
as there was no need for OO here.

=item *

The package Psh::Locale::Base was renamed to Psh::Locale, so the Psh::Locale::
tree now only contains valid locales.

=item *

Many configuration variables have been removed. Please see README.upgrade and the new B<option> builtin. Tieable options by Michael Graham.

=item *

Switch to new evaluation strategies system. Please also see README.upgrade

=item *

The builtin B<pshtokenize> was removed as it duplicated code from the
B<debug> strategy.

=item *

The builtin B<which> more conforms to the 'standard' which - it will only
locate an executable by default. Strategy B<debug> is similar to the old
function of B<which>. B<which> knows some toggles tough for more advanced
searches.

=back

=head2 Other changes

=over 4

=item *

The comment strategy was removed. Comments are now already recognized and
ignored by the parser.

=item *

A limited version of the B<perlfunc> strategy is now loaded by default.
The old strategy B<perlfunc> was renamed to B<perlfunc_heavy>.

=back

=cut

###############################################################################
###############################################################################
##
## 0.009
##
###############################################################################
###############################################################################

=head1 0.009 [2001-01-05]

=head2 New Features

=over 4

=item *

New builtin B<rename> - this does the same as Larry Wall's PPT program
but profits from being integrated into B<psh> (it can use B<psh> subs
and variables for the modification).
- warp [2000-05-01]

=item *

C<Psh::OS::backtick()> now can call and capture the output of
B<psh> builtins on Unix.
- warp [2000-05-01]

=item *

Added new builtin B<fc> which is similar to the command of the same
name from B<bash> - inspired by a comment on the SourceForge
message board (and I finally start to like this command ;-).
- warp [2000-05-03]

=item *

The builtin B<history> now also accepts a text as argument. In that
case it will only print commands containing that text.
- warp [2000-07-08]

=item *

The builtin B<fc> now understands the switch C<-p>. Also it's more
behaviour compatible with B<bash>'s B<fc>.

=item *

New builtin B<bind> which does keybindings (similar to B<bash>).
- Andrew Turner [2000-08-11]

=item *

New builtin B<drives> which shows the available drives on Windows.
- warp [2000-08-26]

=back


=head2 Internals

=over 4

=item *

New sub C<Psh::Util::prompt()> for interactive prompting.
- warp [2000-05-01]

=item *

Cleanups in C<Psh::OS::Unix::_setup_redirects> and
C<...::_remove_redirects>.
- warp [2000-05-01]

=item *

Added C<Psh::add_history> so builtins etc. can modify history
easily.
- warp [2000-07-08]

=item *

Quotes are removed from file names in redirections.
- warp [2000-07-08]

=item *

Fixed variable substitution in C<Psh::PerlEval> so that whitespace
after a backslash does not split words anymore.
- warp [2000-07-08]

=item *

Half-hearted attempt at getting whitespace and special characters
in TAB completion right.
- warp [2000-07-08]

=item *

C<Psh::OS::exit> renamed to C<Psh::OS::exit_psh> due to problems
with POSIX's B<exit>.
- warp [2000-08-26]

=item *

Removed/reduced usage of F<Cwd.pm> due to partly strange behaviour
on non-UNIX systems.
 - warp [2000-08-26]

=item *

The B<help> builtin cleans up the temp files it creates.
- warp [2000-08-26]

=back


=head2 Fixes

=over 4

=item *

The parser now allows usage of ->.
- warp [2000-07-27]

=item *

Should work on Perl 5.004 again.
 - warp [2000-07-31]

=item *

Windows port works and tested on ActiveState Perl 5.6.
- warp [2000-08-26]

=item *

Removed some errors and problems with Windows in prompt package.
- warp [2000-07-31]

=back

=cut

###############################################################################
###############################################################################
##
## 0.008
##
###############################################################################
###############################################################################

=head1 0.008 [2000-04-30]

=head2 New and Enhanced Built-ins

=over 4

=item B<cd> and B<dirs>

The B<cd> builtin now has a (currently unlimited) history list, accessible
using:

  cd -/+/%number

The new builtin B<dirs> displays the stack.

=item B<complete>

Adds a mightier and B<bash> compatible way to define custom completions.

=item B<firsttime>

A firsttime user setup utility for the F<.pshrc> file. It cannot do a lot
currently but will grow in future.

=item B<function>

Tries to emulate B<bash>'s behaviour.

=item B<history>

=item B<unalias>

Does not remove builtins of the same name anymore.

=back


=head2 New Features

=over 4

=item *

Extended Completion code for Perl (supports C<$#foo>, C<$foo-E<gt>{key>,
C<$foo-E<gt>method>, subroutine without C<&>, B<perl> reserved symbol)

=item *

Executable completion now even after initial C<!> for shell escape

=item *

Some minimal status code testing and error handling for user input.

=item *

Understands environment variable C<$IGNOREEOF>.

=item *

Accepts the B<-i> command line switch and ignores it for B<bash> compatibility.

=item *

If the line you entered matches the last line it won't be added to the history.

=item *

On Unix, support for a global F<.pshrc> file at F</etc/pshrc>.

=item *

New variable C<@Psh::executable_noexpand>.

=item *

New variable C<$Psh::interactive> which is set if B<psh> is currently in interactive
mode.

=back


=head2 Bugs Fixed

=over 4

=item *

Fixed some small problems with globbing code.

=item *

Fixed problem with B<pod2man> and F<CHANGES.pod> reported on Sourceforge.

=item *

C<SIGTERM> and C<SIGHUP> are not ignored anymore and cause B<psh> to exit instead.

=item *

Switch B<-r> now reserved for restricted mode, new switch B<-f> for alternative
resource file.

=item *

Fixed problem with quoting which was not removed for the executable strategy.

=item *

Piping is now possible in aliases.

=item *

The parser now allows nesting aliases.

=back

=cut


###############################################################################
###############################################################################
##
## 0.007
##
###############################################################################
###############################################################################


=head1 0.007 [2000-02-14]

Contributions primarily by Markus Peter (C<warp>) and Simon Huggins
(C<huggie>).


=head2 New Features

=over 4

=item *

Support for window titles. New environment variable C<$PSH_TITLE>,
C<$Psh::change_title>, C<$Psh::window_title>. The behavior is like prompt
strings.

=item *

Strategy B<perlfunc> is a default strategy again. C<$Psh::perlfunc_builtins>
determines wether Perl builtins should be C<eval>ed (default 0)

=item *

Builtin B<kill> now supports sending a signal to a named job (e.g. "C<emacs & ;
kill emacs>").

=item *

Builtin B<strategy> for loading strategies on demand and adding them to
the list of strategies to use. Handy for strategies that are used less often
than the core strategies.

=item *

Properly pipeable aliases.

=item *

Fallback and most other builtins are loaded on demand.

=item *

Converted C<&Psh::symbols()> into a builtin, B<symbols>.

=item *

New builtin B<set>.  Acts like B<bash>'s B<set> and returns environment.  Could be
extended to allow C<set -o noclobber> B<bash>-isms to work.

=item *

New strategy C<auto_cd>.

=item *

Builtin B<strategy> now knows command B<available> to list available strategies

=back


=head2 Bug Fixes

=over 4

=item *

The Unix resize handler now works correctly in big B<xterm>s.

=item *

Added C<print "\n"> on CTRL-C to clean up display.

=item *

Fixed generation of C<$Psh::history_file>.

=back


=head2 Other Changes

=over 4

=item *

Added F<README.perl5.004> to explain about C<File::Spec>

=item *

Strategies C<fallback_builtin> and C<perlfunc> modularized and moved into C<Psh::Strategy::*>

=item *

C<Perlfunc> configuration variables are now in C<Psh::Strategy::Perlfunc> for cleanliness.

=item *

Removed C<&Psh::news()> since there's no need for it being included in B<psh> just for the B<tryme> script.

=item *

List of builtins for which autoloading is supported is built automatically during startup.

=back


=cut


###############################################################################
###############################################################################
##
## 0.006
##
###############################################################################
###############################################################################


=head1 0.006 [2000-01-03]

Refinements to 0.005.

New Features:

=over 4

=item *

New builtin B<delenv>.

=item *

Builtin B<kill> accepts multiple PIDs.

=item *

Saving the history file now respects C<$Psh::history_size> if
C<Term::ReadLine::Perl> is used

=item *

Manifest Filters for pipeline code, e.g. try:

    ls | s/y/k/                      # Substitution. Example is a Y2K fix.
    ls | { print ++$i, ": $_"; }q    # Quick. Iterate over lines.
    netstat | { $_[1]>2; }g          # Grepish. Print line if { ... } evaluates to true.

See the B<psh> documentation for more information.

=item *

New recursive globbing using C<**/> (Example: C<grep anything **/*.pm>).

=back


Win32 Port Enhancements:

=over 4

=item *

It now works. 0.005 was missing a couple of patches.

=item *

Makes use of system registry.

=item *

Implementations of C<execute_complex_command()>, C<get_hostname()>,
C<get_all_users()>, C<get_home_dir()>, and C<get_known_hosts()>.

=back


Internals:

=over 4

=item *

Moved prompt code and B<perl> evaluation code into own packages.

=item *

Implementing redirects and pipes in B<psh>.

=item *

Clean-ups for all code using filenames (now using C<File::Spec>).

=item *

More I18N.

=item *

Removed usage of C<$ENV{HOME}> in portable code.

=back

=cut


###############################################################################
###############################################################################
##
## 0.005
##
###############################################################################
###############################################################################


=head1 0.005 [1999-12-28]

A very functional release.


=head2 New Evaluation Strategies

=over 4

=item *

brace

=item *

fallback_builtin

Builtins of this type (currently searched in package C<Psh::Builtins::Fallback>)
will be executed AFTER no program of that name was found.
This allows simulation of common commands like B<ls> and
B<env> on systems not having such binaries.

=item *

auto_resume

=back


=head2 New Bultins

=over 4

=item *

B<builtin>

=item *

B<env>

On systems with an B<env> binary installed it will use the binary, on other
systems (namely Win32) it will print a list of environment variables.

=item *

B<help>

=item *

B<unalias>

=back



=head2 Builtin Enhancements

=over 4

=item *

B<alias>

Changed builtin B<alias> so that 'C<alias name>' displays the
alias definition for that name.

=item *

B<bg>

It's now possible to do 'C<bg commandname>' (e.g. 'C<bg emacs>')
B<fg> has the same behaviour for consistency.

=item *

B<cd>

Respects C<CDPATH> now and sets C<OLDPWD>.

=back


=head2 Portability Enhancements

=over 4

=item *

Added portability infrastructure.

=item *

Working Win32 port (though it has limited features).

=back


=head2 Completion Enhancements

=over 4

=item *

Variables for bookmark completion are now
C<@Psh::Completion::bookmarks> and C<@Psh::Completion::netprograms>.

=item * 

New Perl Hashkey completion will TAB complete the name
of keys for Perl hashes (if they are not written in quotes).

=item *

Support for user defined completions by C<%Psh::Completion::custom_completions>.

=item *

Perl Symbol completion now supports package names and package name completion.

=item *

Support for TAB completions for builtins.

=item *

A C<custom_completions> entry may now also be code. If the
value of a C<custom_completions> key/value pair is a C<sub>
that C<sub> will be called and the result used as rules.

=item *

A rule for C<custom_completions> may now have an optional
third argument. If that argument is true, the
C<custom_completion> will replace the standard completions
instead of adding to them.

=item *

Filename Completion respects the C<FIGNORE> environment
variable now.

=back


=head2 Other Changes

=over 4

=item *

Documentation updates.

=item *

Locales defined for: Default (English), French, German, Italian, Portuguese, and Spanish.

=item *

New fallback builtins: B<ls>

=item *

Prompt evaluation is now more B<bash> compatible and handles even
more complex prompts.

=item *

Replaced C<Psh::OS::Unix::glob()> - now uses its own glob
routine instead of C<CORE::glob()> - and is significantly faster
(important for executable completion).

=item *

New variables: C<$Psh::Prompt_cont>, C<$Psh::result_array>.

=item *

Moved almost all code from C<psh> into C<Psh>, C<Psh::Builtins> and C<Psh::Util>.

=item *

Environment variable C<CURRENT_SHELL> is set to the path to B<psh>.

=back


=head2 Bug Fixes

=over 4

=item *

Generation of weekday names.

=item *

Small fixes for B<setenv>, print_list and abs_path.

=item *

Fixed signal description generation.

=back


=cut


###############################################################################
###############################################################################
##
## 0.004
##
###############################################################################
###############################################################################

=head1 0.004 [1999-12-13]

This release fixes bugs, refactors the code, and adds the
following features:

=over 4

=item *

Background process management much more like B<bash>.

=item *

Perl code in addition to executables may be put in the background.

=item *

Pipelines.

=item *

Initial internationalization.

=item *

New built-ins: C<alias>, C<export>, C<setenv>.

=item *

A flexible set of evaluation strategies that can be
selected or reordered by setting a configuration
variable.

=item *

Prompt strings can have escapes like C<\07> (ASCII C<BEL>) or
C<\10> (ASCII C<LF>).

=item *

avoided trying to save history if there wasn't even a
C<ReadLine> module.

=item *

added C<$psh::debugging> variable to hold the debugging
state, so it can be turned on and off in a running B<psh>.

=item *

A C<$psh::echo> variable to control whether perl results of
evaluation are printed.

=item *

The C<which> builtin now shows which strategy will apply to
a given command line

=item *

Grab more input automatically if C<E<lt>E<lt>BLOCK> appears
anywhere on the line, or if the line ends with an open brace.

=item *

results of C<&psh::which()> searches are hashed.

=item *

Thorough documentation of every user-accessible variable and function

=back

=cut


###############################################################################
###############################################################################
##
## 0.003
##
###############################################################################
###############################################################################

=head1 0.003 [1999-11-23]

Contributions from B<Markus Peter>:

=over 4

=item *

Rudimentary background jobs handling and job management.

=item *

Signal handling.

=item *

Filename completion.

=item *

Updates to history handling.

=item *

Flexible C<%built_ins> mechanism for adding built-in functions.

=item *

Smart mode is on by default.

=back

=cut


###############################################################################
###############################################################################
##
## 0.00205
##
###############################################################################
###############################################################################

=head1 0.00205 [1999-11-08]

=over 4

=item *

Changed prompting to pass prompt string into C<&iget()>,
which passes it on to C<&Term::ReadLine::readline()> or
prints it out if the C<ReadLine> module is not available.
Thanks to B<Sam Tregar> and B<tmb at lumo.com>.

=item *

Changed history handling so that empty lines and those
consisting of entirely whitespace are not recorded.

=item *

Fixed a couple of typos.

=item *

Changed the regular expression for `smart mode' to
allow C<vi +3 psh> in addition to C<ls -l>.

=item *

Now uses C<Getopt::Std> for option processing.

=item *

Fixed the code that detects the presence of C<Term::ReadLine>.

=item *

Made more use of debug mode to print out advisory information.

=item *

Use zero instead of C<undef> to set C<Term::ReadLine::MinLine>
so that we don't get C<undef> usage trouble in the guts of
C<Term::ReadLine::Gnu>.

=back

=cut


###############################################################################
###############################################################################
##
## 0.00204
##
###############################################################################
###############################################################################

=head1 0.00204 [1999-11-01]

=over 4

=item *

Added a bunch of stuff to the C<TODO> file.

=item *

Added parens around each part of the C<$interactive> detection expression.

=item *

Prompt variables are now dealt with via C<%prompt_vars>,
which can be modified, so that custom prompt variables
can be created.

=item *

Added C<%built_ins>.

=back

=cut


###############################################################################
###############################################################################
##
## 0.00203
##
###############################################################################
###############################################################################

=head1 0.00203 [1999-08-28]

=over 4

=item *

Fixed typo that caused a bug where prompt variable C<$>
didn't work. Thanks to B<John Labovitz>.

=back

=cut


###############################################################################
###############################################################################
##
## 0.00202
##
###############################################################################
###############################################################################

=head1 0.00202 [1999-08-23]

Patch.

=cut


###############################################################################
###############################################################################
##
## 0.00201
##
###############################################################################
###############################################################################

=head1 0.00201 [1999-08-23]

Patch.

=cut


###############################################################################
###############################################################################
##
## 0.002
##
###############################################################################
###############################################################################

=head1 0.002 [1999-07-23]

Second release.

=cut


###############################################################################
###############################################################################
##
## 0.001
##
###############################################################################
###############################################################################

=head1 0.001 [1999-07-23]

Initial release

=cut


#
# End of file.
#