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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 120 |
1 files changed, 117 insertions, 3 deletions
diff --git a/NEWS b/NEWS index aac10eddb..d0a8584e2 100644 --- a/NEWS +++ b/NEWS @@ -4,9 +4,44 @@ CHANGES FROM PREVIOUS VERSIONS OF ZSH Note also the list of incompatibilities in the README file. -Changes since 5.8 +Changes since 5.9 ----------------- +In region_highlight and zle_highlight, italic and faint can be +specified as font attributes for terminals that support them. + +Highlighting groups can be referenced in region_highlight and +zle_highlight for common attribute combinations and a layer can be +specified to indicate precedence where highlighted regions overlap. +Highlighting groups are also supported in the prompt via a new %H +prompt escape. + +Ellipsis markers shown by the line editor to indicate where the line +doesn't fit in the terminal can be highlighted. + +The ERR_EXIT and ERR_RETURN options were refined to be more self- +consistent and better aligned with the POSIX-2017 specification of +`set -e`. For details on what exactly changed, see the list of +incompatibilities in the README file. + +Support for named references and namespaces has been added, similar to +those features in ksh but with some notable differences. The `nameref` +builtin and some ksh-equivalent namespace names are available by loading +the zsh/ksh93 module. See the documentation of that module for more. + +Non-forking command substitutions with ${ ... } and ${| ... } are now +available, and the latter extended with ${|param| ... } to return the +result via assignment to the named param rather than always via $REPLY. + +Changes since 5.8.1 +------------------- + +zsh 5.9 is dedicated to the memory of Sven Guckes, who was, amongst other +things, a long-time zsh advocate. For more information, see: + + https://linuxnews.de/2022/02/sven-guckes-verstorben/ + https://groups.google.com/g/vim_announce/c/MJBKVd-xrEE/m/joVNaDgAAgAJ + When unsetting a hash element, the string enclosed in square brackets is interpreted literally after any normal command-line-argument expansions. Thus @@ -37,7 +72,21 @@ fractional seconds. The option CLOBBER_EMPTY was added to enable the overwrite behaviour of CLOBBER for empty files only. It is disabled by default. +A (-) expansion flag was added. It works like (n) but correctly sorts +negative numbers. + +The (*) expansion flag enables EXTENDED_GLOB for pattern matching. +For example, ${(*)sample/(#b)*(pat)*/${match[1]}} uses backreferences +even if EXTENDED_GLOB is not otherwise set. However, this does not +descend into nested expansions, and doubling as (**) does not disable +EXTENDED_GLOB. + The compinit function learnt a -w option to explain why compdump runs. +When run without the -i or -u options and compaudit discovers security +issues, answering "y" to the "Ignore insecure ..." prompt removes the +insecure elements (like the -i option) where previously it ignored the +result (thus formerly like the -u option). Further, removing those +elements includes dropping directories from the $fpath array. The zsh/datetime module's strftime builtin learnt an -n option to omit the trailing newline when printing a formatted time. @@ -47,11 +96,76 @@ widgets. This corresponds to long-standing behavior of other user ZLE widgets. Use the _complete_debug widget to capture XTRACE output, or use "functions -T" to enable tracing of specific completion functions. +The fc builtin learnt an -s option which is a POSIX equivalent to the +`fc -e-` method of re-executing a command without invoking an editor. + +The option CASE_PATHS was added to control how NO_CASE_GLOB behaves. +NO_CASE_GLOB + NO_CASE_PATHS is equivalent to the current NO_CASE_GLOB +behaviour. NO_CASE_GLOB + CASE_PATHS treats only path components that +contain globbing characters as case-insensitive; this behaviour may +yield more predictable results on case-sensitive file systems. +NO_CASE_PATHS is the default. + With the new TYPESET_TO_UNSET option set, "typeset foo" leaves foo unset, in contrast to the default behavior which assigns foo="". Any parameter attributes such as numeric type, sorting, and padding are retained until the parameter is explicitly unset or a conflicting value is assigned. -This is similar to default behavior of bash and ksh. +This is similar to default behavior of bash and ksh. This option is +disabled by default. + +The compadd builtin's -D option can now be specified more than once. + +The zsh/zutil module's zformat builtin learnt an -F option which behaves +like -f except that ternary expressions check for existence instead of +doing math evaluation. + +The conventional syntax used to indicate units, ranges, and default values +in completion descriptions (e.g. `timeout (seconds) (0-60) [20]`) is now +recognised by the completion system itself. These components are parsed +out of the description and can be individually styled. A _numbers helper +function has been added to help function authors offer rich completion +for these values. + +The log builtin, WATCH parameter, et al., have been broken out into a +separate module, zsh/watch. The module is enabled by default. + +The zsh/watch module's WATCHFMT parameter now supports colours via the +%F and %K escapes. + +The STTY parameter can now be set to an empty string before running a +command to automatically restore terminal settings after the command +finishes. + +The "jobs" command and "$jobstates" and related parameters can report on +parent shell jobs even in subshells. This is a snapshot of the parent +state, frozen at the point the subshell started. However, if a subshell +starts its own background jobs, the parent state is discarded in order +to report on those new jobs. + +Changes from 5.8 to 5.8.1 +------------------------- + +CVE-2021-45444: Some prompt expansion sequences, such as %F, support +'arguments' which are themselves expanded in case they contain colour +values, etc. This additional expansion would trigger PROMPT_SUBST +evaluation, if enabled. This could be abused to execute code the user +didn't expect. e.g., given a certain prompt configuration, an attacker +could trick a user into executing arbitrary code by having them check +out a Git branch with a specially crafted name. + +This is fixed in the shell itself by no longer performing PROMPT_SUBST +evaluation on these prompt-expansion arguments. + +Users who are concerned about an exploit but unable to update their +binaries may apply the partial work-around described in the file +Etc/CVE-2021-45444-VCS_Info-workaround.patch included with the shell +source. [ Reported by RyotaK <security@ryotak.me>. Additional thanks to +Marc Cornellà <hello@mcornella.com>. ] + +A regression was introduced in 5.8.1 in which, when reading a script +from standard input, zsh itself would consume lines that should otherwise +have been consumed by commands executed earlier in the script. This was +not intentional and has been fixed in subsequent versions. Changes from 5.7.1-test-3 to 5.8 -------------------------------- @@ -571,7 +685,7 @@ Here is a summary of the most significant changes: - The zshroadmap manual page provides a slightly more helpful introduction to the shell manual than was previously available. -- There have been some notable enhancements to POSIX comptability +- There have been some notable enhancements to POSIX compatibility when the shell is in a corresponding emulation (e.g. "emulate sh"). Expansion (parameters, globbing, etc.) and redirection |