v2.7

• Renamed trap and untrap to sig trap, sig untrap;
• Added sig mask;
• Added defer;
• Added /dev/tcp and /dev/udp;
• Added coproc (coprocesses, like in Bash);
• Added bindkey -l;
• Added <> (open for both reading and writing);
• Added str <s> * <n>;
• Fixed select behaviour;
• Fixed arr := not clearing the old array;
• Fixed @ bugs;
• Fixed regexp behaviour;
• Made str complain less, added list -= ...;
• Less careless error handling;
• read now consumes separators the same way as sh;
• Made wait be more than just while (wait(NULL)) {};
• Made command lookup less slow and fixed other inefficiencies;
• Nicer job control notifications;
• Added more demos;
• Fixed issues regarding named pipe lifetimes;
• Make the shell escape \cX in lists.

v2.6h

Hotfix for v2.6

• Fixed more job control;
• Job notifications now show the pipeline on stop/signal;
• Subshells can now be stopped, resumed, etc. in interactive mode;
• fn sig<name> replaced with trap/untrap;
• Added unfn for deleting functions to avoid confusing use of fn with one argument;
• Added async-safe signal trapping mechanism (achieved with self-pipe trick);
• Refactor everything to use incremental build;
• No more semaphores for sync.

v2.6

This is a big one, boys.

• Added regex match operator =~ in the str command;
• fn prompt is now replaced with two variables, $prompt1 and $prompt2;
• Cygwin support (+ some weird behaviour, and also an .ico);
• Rewrote a lot of code to use RAII and scope cleanup, replaced old-school C idioms where appropriate;
• expr overhaul:
  • ** precedence and associativity change;
  • Added hyperbolic trig functions (e.g. sinh, argth), all with their many worldwide aliases;
  • Added symbolic constants e, pi;
  • Total rewrite of this command in pure C++ with a cool X-macro table for the operators, the command no longer relies on flex and bison being installed (which also lead to a slight speedup).
• Source is now compileable with only a POSIX toolchain plus ISO C++11 (I think);
• New example scripts in the examples folder, they are now also installed to /usr/share/doc/zrc alongside the LICENSE and README when installing the AUR package;
• Made break/continue work with repeat;
• Stuff related to lexing:
  • All looping constructs now cache the lexer's work to avoid redundant parsing;
  • The lexer uses more move semantics than before;
• Fixed many gnarly job control cases, added semaphores to avoid controlling terminal race;
• Line editor now uses poll API instead of select, to not break with big FD's;
• Fixed bugs with lists where certain characters were not escaped;
• Fixed certain variables crashing the shell when exported;
• The interpreter now prints an error when a script file contains an unclosed brace/quote/square bracket.

v2.5h

v2.5 very small hotfix

• Fixed some job control bugs regarding SIGHUP;
• Fixed behaviour when running some programs that take stdin
• Added disown;
• $0, $1, ... are now aliases for ${argv 0}, ${argv 1}, etc.

v2.5

New update with a bunch of features added!

• Added .= to set for string concatenation;
• Added caller command, for Bash style stack traces;
• Added try/catch and throw;
• Added logical (non-bitwise) ^^ XOR operator in expr;
• > actually opens files in O_TRUNC now (rookie mistake);
• fn prompt no longer forces its output to stderr, user can choose where his prompt goes now;
• FD management no longer does manual counting, uses fcntl instead;
• More RAII in the codebase, reducing bugs.

v2.4

This is a very big update (also I definitely didn't just steal a bunch of Bash features)

• Added select like in Bash (new control flow for simple number menus);
• Added fc, for command correction using an external text editor, as well as histfile juggling (might add history in the future too);
• Added logout, which is like exit but only works from a login shell session;
• Added login shell detection: ~/.zrc_(profile/login/logout) scripts get automatically sourced on login/logout now;
• make install now puts the binary's name in /etc/shells;
• help command souped up even more, now shows alias definitions;
• Added $ifs (input field separator)
• Some bugfixes.

v2.3h

Hotfix for v2.3. Not enough features for a full version number

• Added the getopts command, which works like in Bash, as well as an example. This is probably the only major addition except for some fixes in the codebase
• Speaking of getopt, the builtins that call it now use RAII to restore its special globals
• Fixed cd behaviour if home dir not found (potential UB)
• Removed opportunities for buffer overflows in the code
• Fixed integer comparisons with NaN
• Fixed some bugs in regexp, str, read, rlimit, help
• Reimplemented some ctrl flow to not use goto
• Builds with clang++ no longer complain with a lot of purple warnings

v2.3

A pretty small update, should've called it something else

• Added apply (lambda functions)
• Added list map, list filter, list reduce (functional paradigm)
• Added cot as an alias for ctg in expr evaluator
• Re-added some old example scripts to the repo
• Fixed custom signal handler behaviour for SIGINT and SIGTSTP
• Fixed some minor issues

v2.2

v2.2 is now done. Very few bugs remain :)

• The help command can now output the contents (script) of functions, and it can now list functions as well as builtins.
• Added Tcl-style unknown command.
• Re-added regexp.
• Re-added shift.
• Job control improved. Scripts can actually be stopped now.
• Background eval-blocks/non-external commands are handled properly again. All commands are homogenously treated now.
• New stack-based phrase (logical line) reader, which is more robust and similar to Tcl.

v2.1

New version, though a pretty small update. Here's the new stuff in v2.1.

• Added repeat command (evaluates a floor expression and uses it as a counter)
• Added sgn as a new expr math function/operator
• Fixed a buffer bug which could have led to UB
• Better arrays:
  • Added arr <a> (returns key/value pairs)
  • Added arr <a> keys (returns keys)
  • Added arr <a> vals (return values)
  • Array keys are now sorted by numeric value (if possible), or by string index otherwise

Have fun! ;)