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Brought to you by a comma-command in the REPL and the REPL startup
function.
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On the racket side, we use a custom print handler to print
images (convertible? values; see file/convertible) in a special format:
#<Image: filename>
On the geiser side, we add a comint post-output hook to search for
that filename and replace it with inline images.
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This one probably requires Racket 5.3, and incorporates some
parameterization to the module compilation and evaluation code in
Geiser's version of enter.rkt. I'm mostly mirroring what the latter
does, and i'm probably not completely understanding all corner cases,
so the two users of Geiser should keep an eye open for possible
breakage introduced by this patch.
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It's not perfect and undocumented, but useful nonetheless.
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This bugs was exposed by using rackunit, where all the output of, say,
check-eq? was lost for good (it was being sent to the stderr black
hole).
Hat tip Grant Retkke.
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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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As Stanisław Halik reported, autodoc was receiving a mlist (instead of
a list) as its argument when invoked in an R5RS context. Turns out we
were evaluating geiser-eval's arguments in the wrong context (the
procedure being applied and the arglist belong to the same namespace).
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Thanks to Caleb Reach.
We were using current-input-port, which is not the right port in
graphical environments.
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And we take the chance to lightly document the existence of this
new command in the user manual.
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The catch here is that one cannot use #%variable-reference inside an
R5RS module, and, as a consequence, namespace->module-path-name was
failing badly. The solution is to take note of the module name being
entered before hand, and use that name in case of error (we could
actually use that name always, but then cheaters using Racket's enter!
would see an inconsistent name (which probably they deserve)).
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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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When the symbol is imported and re-exported by a second module, we
display its definition name and original module, besides the name of
the module re-exporting it.
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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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Refreshing the cache on form evaluation (had been deactivated by error
since the introduction of meta-commands). The current behaviour is not
yet completely correct: if one evaluates a form in a modified buffer,
geiser won't notice the new definition's signature, not even after the
buffer is saved if one has gone around asking for autodoc before that.
An improvement would be to make the cache sensitive to file write
times, as suggested back in the day by Eli & Neil.
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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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Spinning up from correct fontification of [else in this brave Racket
world.
I'm keeping the list of extra keywords lean and mean, but making it
customizable in both Racket and Guile.
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Inferior schemes weren't really a good idea, were they? With remote
connections one can launch an external scheme to debug Geiser anyway.
And everything is (ahem, will be) simpler when we add new
implementations.
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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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Conflicts:
elisp/geiser-guile.el
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