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unposted: update and tidy NEWS

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Peter Stephenson 2010-11-30 12:13:18 +00:00
parent f1846856b3
commit d7f01887d5
2 changed files with 65 additions and 29 deletions
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7
ChangeLog
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@ -1,3 +1,8 @@
2010-11-30 Peter Stephenson <pws@csr.com>
* unposted: NEWS: add news about ${NAME:OFFSET} and took the
opportunity for a general tidy up.
2010-11-27 Barton E. Schaefer <schaefer@zsh.org>
* 28461: Src/exec.c: flush stderr in PRINT_EXIT_VALUE handling.
@ -13867,5 +13872,5 @@
*****************************************************
* This is used by the shell to define $ZSH_PATCHLEVEL
* $Revision: 1.5131 $
* $Revision: 1.5132 $
*****************************************************

87
NEWS
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@ -11,17 +11,35 @@ When the shell is invoked with the base name of a script, for example as
`zsh scriptname', previous versions of zsh have used the name directly,
whereas other shells use the value of $PATH to find the script. The
option PATH_SCRIPT has been added to provide the alternative behaviour.
This is turned on where appropriate in compatibility modes.
Parameters, globbing, etc.
-+-+-+-+-+-+-+-+-+-+-+-+-+
Parameter expansion has been enhanced to provide the ${NAME:OFFSET} and
${NAME:OFFSET:LENGTH} syntax for substrings and subarrays present in
several other shells. OFFSET always uses zero-based indexing. The only
clash with existing zsh syntax occurs if OFFSET begins with an
alphabetic character or `&', which is not likely.
The (D) flag in parameter expansion abbreviates directories in the
substituted value. The (q-) flag does minimal shell quotation of arguments
for maximum human readability of the result.
The glob qualifier P can be used to add a separate word before each
match. For example, *(P:-f:) produces the command line
`-f file1 -f file2 ...'.
The module zsh/system has a new "zsystem" builtin whose subcommands perform
system level tasks. Currently "zsystem flock" performs advisory file
locking (for aficionados, this uses the fcntl() system call so works over
the network on Linux). This is a particularly convenient way of locking
files for the length of a subshell. "zsystem supports flock" provides a
test for this feature.
Regular expression matches now use the same variables for storing matched
components as shell pattern matching. The function system now provides the
function regexp-replace for replacing text using regular expressions. The
zle widget functions replace-string, replace-string-again, if defined with
regex in the name (e.g. "zle -N replace-regexp replace-string"), perform
regular expression matches. In replacement text \& and \1 have the
standard meaning.
Line editor and completion
-+-+-+-+-+-+-+-+-+-+-+-+-+
The completion system now has a style path-completion. Setting this to
false inhibits completion of paths before the current path component,
@ -41,23 +59,40 @@ an error when editing the line. The following code can be used
to create a bindable editor widget to restore the aborted line:
recover-line() { LBUFFER=$ZLE_LINE_ABORTED RBUFFER=; }
zle -N recover-line
and then either bind recover-line to a key sequence or use
`M-x recover-line <RET>'.
The parameter ZLE_STATE, available in user-defined line editor widgets,
gives information on the state of the line editor. Currently this is
whether the line editor is in insert or overwrite mode.
There is now a function system for recording and restoring recently
entered directories. See the entry for cdr in the zshcontrib manual page.
The (D) flag in parameter expansion abbreviates directories in the
substituted value. The (q-) flag does minimal shell quotation of arguments
for maximum human readability of the result.
Miscellaneous options
-+-+-+-+-+-+-+-+-+-+-
The new shell option HIST_LEX_WORDS causes history lines read in from
a file to be split in the same way as normal shell lines, instead of
simply on whitespace. It's an option as although the result is more
accurate it can take a long time when the history size is large.
The shell option MONITOR can be set in non-interactive shells, and also in
subshells (as created by surrounding commands with parentheses), turning on
job control for that subshell. The initial behaviour of a subshell is
still to turn job control off, however if the new POSIX_JOBS option is set
MONITOR remains active in subshells.
The new shell option POSIX_CD, active in emulations of POSIX-based shells,
makes the cd builtin POSIX-compatible.
The POSIX_JOBS option already referred to has various other
compatibility enchancements.
The new shell option POSIX_STRINGS makes a null character in $'...'
expansion terminate the string. This is not particularly useful
behaviour but may become a POSIX requirement.
The new shell option POSIX_TRAPS causes the EXIT trap to behave in the same
way as in other shells, i.e. it is only run when the shell exits.
The new shell option SOURCE_TRACE causes the shell to report files
containing shell code that the shell executes directly, i.e. startup files
or files run with the `source' or `.' builtins.
@ -65,25 +100,21 @@ or files run with the `source' or `.' builtins.
The shell option SUN_KEYBOARD_HACK has been supplemented by a more general
mechanism: the KEYBOARD_HACK variable defines the character to be ignored.
The new shell option POSIX_CD, active in emulations of POSIX-based shells,
makes the cd builtin POSIX-compatible.
Add-on modules and function
-+-+-+-+-+-+-+-+-+-+-+-+-+-
The new shell option POSIX_TRAPS causes the EXIT trap to behave in the same
way as in other shells, i.e. it is only run when the shell exits.
The module zsh/system has a new "zsystem" builtin whose subcommands perform
system level tasks. Currently "zsystem flock" performs advisory file
locking (for aficionados, this uses the fcntl() system call so works over
the network on Linux). This is a particularly convenient way of locking
files for the length of a subshell. "zsystem supports flock" provides a
test for this feature.
The shell option MONITOR can be set in non-interactive shells, and also in
subshells (as created by surrounding commands with parentheses), turning on
job control for that subshell. The initial behaviour of a subshell is
still to turn job control off, however if the new POSIX_JOBS option is set
MONITOR remains active in subshells.
There is now a function system for recording and restoring recently
entered directories in a persistent fashion, with support in completion
and (if explicitly installed) dynamic directory expansion. See the
entry for cdr in the zshcontrib manual page.
Regular expression matches now use the same variables for storing matched
components as shell pattern matching. The function system now provides the
function regexp-replace for replacing text using regular expressions. The
zle widget functions replace-string, replace-string-again, if defined with
regex in the name (e.g. "zle -N replace-regexp replace-string"), perform
regular expression matches. In replacement text \& and \1 have the
standard meaning.
Changes between versions 4.3.9 and 4.3.10
-----------------------------------------