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unposted: update and tidy NEWS
This commit is contained in:
Peter Stephenson
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f1846856b3
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@ -1,3 +1,8 @@
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2010-11-30 Peter Stephenson <pws@csr.com>
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* unposted: NEWS: add news about ${NAME:OFFSET} and took the
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opportunity for a general tidy up.
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2010-11-27 Barton E. Schaefer <schaefer@zsh.org>
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* 28461: Src/exec.c: flush stderr in PRINT_EXIT_VALUE handling.
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@ -13867,5 +13872,5 @@
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*****************************************************
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* This is used by the shell to define $ZSH_PATCHLEVEL
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* $Revision: 1.5131 $
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* $Revision: 1.5132 $
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*****************************************************
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87
NEWS
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
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`zsh scriptname', previous versions of zsh have used the name directly,
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whereas other shells use the value of $PATH to find the script. The
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option PATH_SCRIPT has been added to provide the alternative behaviour.
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This is turned on where appropriate in compatibility modes.
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Parameters, globbing, etc.
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-+-+-+-+-+-+-+-+-+-+-+-+-+
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Parameter expansion has been enhanced to provide the ${NAME:OFFSET} and
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${NAME:OFFSET:LENGTH} syntax for substrings and subarrays present in
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several other shells. OFFSET always uses zero-based indexing. The only
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clash with existing zsh syntax occurs if OFFSET begins with an
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alphabetic character or `&', which is not likely.
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The (D) flag in parameter expansion abbreviates directories in the
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substituted value. The (q-) flag does minimal shell quotation of arguments
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for maximum human readability of the result.
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The glob qualifier P can be used to add a separate word before each
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match. For example, *(P:-f:) produces the command line
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`-f file1 -f file2 ...'.
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The module zsh/system has a new "zsystem" builtin whose subcommands perform
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system level tasks. Currently "zsystem flock" performs advisory file
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locking (for aficionados, this uses the fcntl() system call so works over
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the network on Linux). This is a particularly convenient way of locking
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files for the length of a subshell. "zsystem supports flock" provides a
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test for this feature.
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Regular expression matches now use the same variables for storing matched
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components as shell pattern matching. The function system now provides the
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function regexp-replace for replacing text using regular expressions. The
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zle widget functions replace-string, replace-string-again, if defined with
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regex in the name (e.g. "zle -N replace-regexp replace-string"), perform
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regular expression matches. In replacement text \& and \1 have the
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standard meaning.
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Line editor and completion
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-+-+-+-+-+-+-+-+-+-+-+-+-+
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The completion system now has a style path-completion. Setting this to
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false inhibits completion of paths before the current path component,
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@ -41,23 +59,40 @@ an error when editing the line. The following code can be used
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to create a bindable editor widget to restore the aborted line:
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recover-line() { LBUFFER=$ZLE_LINE_ABORTED RBUFFER=; }
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zle -N recover-line
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and then either bind recover-line to a key sequence or use
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`M-x recover-line <RET>'.
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The parameter ZLE_STATE, available in user-defined line editor widgets,
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gives information on the state of the line editor. Currently this is
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whether the line editor is in insert or overwrite mode.
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There is now a function system for recording and restoring recently
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entered directories. See the entry for cdr in the zshcontrib manual page.
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The (D) flag in parameter expansion abbreviates directories in the
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substituted value. The (q-) flag does minimal shell quotation of arguments
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for maximum human readability of the result.
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Miscellaneous options
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-+-+-+-+-+-+-+-+-+-+-
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The new shell option HIST_LEX_WORDS causes history lines read in from
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a file to be split in the same way as normal shell lines, instead of
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simply on whitespace. It's an option as although the result is more
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accurate it can take a long time when the history size is large.
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The shell option MONITOR can be set in non-interactive shells, and also in
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subshells (as created by surrounding commands with parentheses), turning on
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job control for that subshell. The initial behaviour of a subshell is
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still to turn job control off, however if the new POSIX_JOBS option is set
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MONITOR remains active in subshells.
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The new shell option POSIX_CD, active in emulations of POSIX-based shells,
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makes the cd builtin POSIX-compatible.
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The POSIX_JOBS option already referred to has various other
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compatibility enchancements.
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The new shell option POSIX_STRINGS makes a null character in $'...'
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expansion terminate the string. This is not particularly useful
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behaviour but may become a POSIX requirement.
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The new shell option POSIX_TRAPS causes the EXIT trap to behave in the same
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way as in other shells, i.e. it is only run when the shell exits.
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The new shell option SOURCE_TRACE causes the shell to report files
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containing shell code that the shell executes directly, i.e. startup files
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or files run with the `source' or `.' builtins.
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@ -65,25 +100,21 @@ or files run with the `source' or `.' builtins.
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The shell option SUN_KEYBOARD_HACK has been supplemented by a more general
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mechanism: the KEYBOARD_HACK variable defines the character to be ignored.
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The new shell option POSIX_CD, active in emulations of POSIX-based shells,
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makes the cd builtin POSIX-compatible.
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Add-on modules and function
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-+-+-+-+-+-+-+-+-+-+-+-+-+-
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The new shell option POSIX_TRAPS causes the EXIT trap to behave in the same
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way as in other shells, i.e. it is only run when the shell exits.
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The module zsh/system has a new "zsystem" builtin whose subcommands perform
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system level tasks. Currently "zsystem flock" performs advisory file
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locking (for aficionados, this uses the fcntl() system call so works over
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the network on Linux). This is a particularly convenient way of locking
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files for the length of a subshell. "zsystem supports flock" provides a
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test for this feature.
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The shell option MONITOR can be set in non-interactive shells, and also in
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subshells (as created by surrounding commands with parentheses), turning on
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job control for that subshell. The initial behaviour of a subshell is
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still to turn job control off, however if the new POSIX_JOBS option is set
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MONITOR remains active in subshells.
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There is now a function system for recording and restoring recently
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entered directories in a persistent fashion, with support in completion
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and (if explicitly installed) dynamic directory expansion. See the
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entry for cdr in the zshcontrib manual page.
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Regular expression matches now use the same variables for storing matched
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components as shell pattern matching. The function system now provides the
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function regexp-replace for replacing text using regular expressions. The
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zle widget functions replace-string, replace-string-again, if defined with
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regex in the name (e.g. "zle -N replace-regexp replace-string"), perform
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regular expression matches. In replacement text \& and \1 have the
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standard meaning.
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Changes between versions 4.3.9 and 4.3.10
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-----------------------------------------
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