Replace static _PROMPT/_PROMPT2 with dynamic __prompt(exitcode)/__prompt2(exitcode)
functions. Fallback chain: __prompt() → _PROMPT → "> ". Install a default __prompt
that shows the current directory with ~ abbreviation. Track last exit code from the
REPL loop and pass it to the prompt function.
Add !command syntax that runs commands with inherited terminal (no
capture). The lexer treats ! as a statement-starting token, reading
to end-of-line with the same interpolation/escape/pipe support as
backtick commands. The C function sets _ = {code=N, stdout="", stderr=""}.
Add split_pipeline() to split command strings on unquoted | and
exec_pipeline() to fork N children connected by inter-stage pipes.
Only the last stage's stdout/stderr are captured; middle stages'
stderr is inherited. Exit code comes from the last stage.
Redesign issue #10: bare-word commands now work in both scripts and
the REPL via a parser-level heuristic (identifier + non-exception-list
token → shell command). Add runtime fallback for string-arg syntax
(echo "hello"), double-dash flag handling, and classification examples.
Add issue #12 for path-based command execution (./script, /bin/ls, ~/bin/deploy).
Add testes/lush/commands-interactive.lua as a design playground covering
result table structure, exit codes, commands inside Lua blocks, _ behaviour,
runtime fallback, Lua variable shadowing, and interleaved Lua/shell.
Use uname -s to select Linux vs macOS build flags instead of
hardcoding. Add -undefined dynamic_lookup for test shared libs
on macOS. Set _port=true automatically on non-Linux in ./all.
Add test suite under testes/lush/ covering backtick commands, argv
parsing, ${} interpolation, and $NAME environment variables. Wire
them into testes/all.lua so they run with the full Lua 5.5 suite.
Skip /dev/full test in files.lua when the device doesn't exist
(macOS has no /dev/full).
When calling 'luaK_storevar', the 'expdesc' for the variable must be
created before the one for the expression, to satisfy the assumptions
for register allocation. So, in a statement like 'global a = exp', where
'a' is actually '_ENV.a', this variable must be handled before the
initializing expression 'exp'.
The check for limit of local variables is made after generating code to
initialize them. If there are too many local variables not initialized,
the coding of instruction OP_LOADNIL could overflow an argument.
A vararg table can be virtual. If the vararg table is used only as
a base in indexing expressions, the code does not need to create an
actual table for it. Instead, it compiles the indexing expressions
into direct accesses to the internal vararg data.
- LUAMOD_API defined as 'extern "C"' in C++.
- "ANSI C" is in fact "ISO C" (comments)
- Removed option -std from makefile in testes/libs. (Easier to change
to C++ for tests).
A bad actor could fill only a few entries in a table (power of twos in
decreasing order, see tests) and produce a small table with a huge
length. If your program builds a table with external data and iterates
over its length, this behavior could be an issue.
That complicates a little object equality (and therefore table access
for long strings), but the old behavior was somewhat weird. (Short
strings, a concept otherwise absent from the manual, could not be
external.)
External strings created by DLLs may need the DLL code to be
deallocated. This implies that a DLL can only be unloaded after all
its strings were deallocated, which happen only after the run of all
finalizers. To ensure that order, we create a 'library string' to
represent each DLL and keep it locked. When this string is deallocated
(after the deallocation of any string created by the DLL) it closes its
corresponding DLL.
All-weak tables are not being revisited after being visited during
propagation; if it gets a new metatable after that, the new metatable
may not be marked.
No thread started with pcall (instead of resume) can be closed,
because coroutine.close would not respect the expected number of
results from the protected call.
A goto cannot jump into the scope of any variable declaration,
including 'global *'. To report the error, it needs a "name" for
the scope it is entering.
