* gash/arithmetic.scm: New file.
* Makefile.am (SOURCES): Add it.
* gash/lexer.scm (get-arithmetic-expansion): New procedure.
(get-expansion): Check for "$((" and use the new procedure to read an
arithmetic expansion.
* gash/eval.scm (word->qword): Handle '<sh-arithmetic>'.
* tests/unit/eval.scm: Add tests.
* tests/spec/Makefile.am (TESTS): Add 'arith'.
* tests/spec/oil.scm: Patch seven of its tests and filter out fifteen
others.
* doc/gash.texi, doc/syntax.txt: Add '<sh-arithmetic>' syntax.
* doc/gash.texi (Internal representation examples): In the section
on pipelines, change a redirect in the result to "ice-cream.txt" to
match its input.
* doc/gash.texi: Add an introduction, add a discussion of included and
missing features, document the parser interface, and remove the
indexes.
* doc/syntax.txt: Update to match the manual.
This commit brings in the entire history of the Gash project. There
are a few conflicts, which are explained below.
* .dir-locals.el: Combine both files.
* .gitignore: Combine both files.
* COPYING: Use the Geesh version with HTTPS URLs.
* README: Use the Gash README.
* guix.scm: Use the Geesh package definition (the Gash one is
preserved in gash.guix.scm).
The AST generated by the parser did not match the syntax document.
However, neither were right. This commit updates the syntax document
to describe a more consistent form, and fixes the code to follow it.
* doc/syntax.txt (word): Make the children of '<sh-cmd-sub>' a
possibly empty list of 'list's.
* geesh/lexer.scm (get-bracketed-command): Splice in children for
'<sh-cmd-sub>'.
(get-backquoted-command): Ditto.
* geesh/parser.scm (read-sh/bracketed): Make sure that result is
always a list.
(read-sh/backquoted): Ditto.
* tests/lexer.scm: Update tests accordingly.
* tests/parser.scm: Ditto.
Timothy Sample
Stephen J. Scheck
Jan Nieuwenhuizen