- ${#v}, ${v#p} ${v##p} ${v%p} ${v%%p}, ${v/p/r} ${v//p/r} ${v/#p/r}
${v/%p/r}, ${v:off:len}, ${v-w} ${v:=w} ${v:+w} ${v:?msg}; nested ${}
- arithmetic expansion $((...)) with the C operators, ** and assignments
- set -e, set -x, set -o pipefail (also as gosh options, passed on to
subshells); set shows variables, set -o the options
- trap for EXIT and signals; scripts with an EXIT trap run it on
SIGINT/SIGTERM/SIGHUP too
- eval, exec (also exec > file without a command), $!, wait pid
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- new parser (parser.go) for lists, pipelines, ! and if/elif/else/fi,
for ... in ... do/done, while/until ... do/done; simple commands are
kept as text and expanded when they run (in every iteration)
- break [n], continue [n] and the : builtin
- incomplete input (open control structure, trailing &&, |, quote or
backslash) continues on the next line: prompt "> " in interactive
shells, scripts and startup files read on
- Ctrl+C aborts the whole command line, including loops
- aliases are expanded at the start of every simple command, also inside
control structures
- control structures in pipelines, with redirections or in the
background are reported as not supported
- completion: commands after if, then, do etc.
- main_test.go reformatted with gofmt
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- $(command) is replaced by the output of command, which runs in a
subshell (gosh -c), so cd/set in it do not change the shell
- trailing newlines are removed; unquoted the output is split into words
at blanks and newlines, "$(...)" stays one word; wildcards in the
output are not expanded
- nested substitutions, quotes and operators inside are handled; the
list, alias and brace scanners skip $(...) as a whole
- a command that consists only of a substitution has its exit status,
Ctrl+C in a substitution aborts the command
- $((...)) is reported as not supported
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Florian WaltherandClaude Opus 5.5