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Using cond-expand to provide support for the new world of guile 2.2
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Soooo, the long delay experienced when evaluating long string lists in
Guile had nothing to do with the time took by emacs to read the response
from the scheme process; that process is always a breeze, no matter or
its format or number of newlines. The delay was provoked by an innocent
looking function that scans the received string (which includes a prompt
at the end as an EOT marker) to check whether Guile (or any other
scheme) has just entered the debugger (that's done inside
`geiser-con--connection-update-debugging`). For some reason,
`string-match` on that kind of string using Guile's regexp for a debug
prompt takes forever. Instead of trying to optimize the regular
expression, i've just applied it to the *second* line of the received
string, which is the one that contains the response's prompt.
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Should fix issue #85
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We use the same trick as chicken for guile, and pretty-print the
evaluation results before writing them. The trick wasn't working at all
until i specified a value for the undocumented keyword parameter
`#:max-expr-width`, which makes me think i might be missing something.
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We add the paths in geiser-guile-load-path also to %load-compiled-path,
and new directories added to the load path via geiser-add-to-load-path
are added to both %load-path and %load-compiled-path.
Here's hope Ludovic will like all these additions!
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I must admit this is yet another excuse to check geiserbot over at
freenode.
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We were just ignoring it so far!
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Actually, i'm not even sure the calls to format i was using were
correct at all!
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This is a 2.0 fluid that governs how warning messages are displayed.
In Geiser, we need the prefix set to an empty string so that file
paths are clickable (and the display in a separate emacs buffer is nicer).
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As per Andy's request. Adding it to Racket (and to the user manual),
shouldn't be difficult).
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We avoid using elisp's read for symbols, reading uninterned ones
instead. And then, we cannot use symbols as keys in responses from
scheme: we're using strings instead.
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We put the value of the identifier where it belongs, and add a missing
period. Works, but geiser/doc.scm is in sore need of a refactoring.
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We have a new "manual lookup" command, and Racket now displays a doc
browser buffer for help with a button activating it. In the process,
we've cleaned-up a little mess in geiser-eval.el and geiser-doc.el,
and refactored the affected Racket modules.
Next in line is providing manual lookup for Guile.
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We now display procedure signatures in module help, and keep a cache
in Guile, using procedure properties.
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Separate connections for the REPL and Geiser commands was kind of
neat, but it had the problem of synchronising the current namespace
for both connections. A quick fix would have been to ask the scheme
for the current namespace for every Geiser command in the REPL, but
that, besides clunky, would add potentially prohibitive overhead for
(real) remote connections.
As it happens, using a single connection turned out to be not that
difficult and relatively clean code-wise. We could even turn back to
not use inferior schemes, and the net result of this refactoring would
be the replacement of comint-redirect (which wasn't able to match the
whole EOT token if it didn't arrive all at once) by transaction queues
(which also makes geiser-connection's implementation cleaner).
But using an inferior scheme has a dog-food value, and allows external
processes to connect to the scheme being used by Geiser without
further ado, which could be useful for debugging (although this is a
lame excuse: nothing prevents you from starting a REPL server from
emacs if you want). We'll see.
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Or the importance of EOL. Switching to a transaction queue for
communication with the Scheme process means that i had to care about
sending eols in the queries... Guile was waiting for ever reading a
metacommand taking a variable number of arguments. Argh: this has
taken me a few hours -- i'm getting old.
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geiser-connect (or its specialisation, connect-to-guile) working for
Guile, where the external process is started with the new --listen
flag.
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Temporary modules with fancy gensym names have kind #f.
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