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https://github.com/babashka/SCI - also see #babashka and #nbb
Markus Agwin 2021-05-31T13:40:21.078800Z
In attempting to create a Scittle plugin, (sci/copy-var some-macro sci-created-ns) (where some-macro is a symbol created by :refer-macros) results in an "Unable to resolve var" error. Just to be sure: it's not possible to expose macros of an arbitrary cljs-library in a Scittle plugin, right?
borkdude 2021-05-31T13:47:19.079300Z
To be sure, just re-implement the macro in terms in CLJS as a normal function
borkdude 2021-05-31T13:47:39.079600Z
and then use :sci/macro as metadata on that function to expose it to sci
borkdude 2021-05-31T13:48:20.080500Z
(defn my-macro [_form _env x y & zs] `(do ...))
(with-meta my-macro {:sci/macro true})Markus Agwin 2021-06-01T08:48:31.080900Z
I cannot get this to work:
(ns scittle.makro-plugin
(:require
[sci.core :as sci]
[scittle.core :as scittle]))
(defn add-low-fn [_env _form x y & zs] `(str "__" ~x ~y ~zs))
(def add-low-makro (with-meta add-low-fn {:sci/macro true}))
(def rns (sci/create-ns 'makro-plugin.core nil))
(def makro-plugin-namespace
{'add-low-fn (sci/copy-var add-low-fn rns)
'add-low-makro (sci/copy-var add-low-makro rns)})
(scittle/register-plugin!
::makro-plugin
{:namespaces {'makro-plugin.core makro-plugin-namespace}})add-low-makro behaves the same way as add-low-fn . Do I need to add something in order to SCI recognise a macro?borkdude 2021-06-01T08:53:17.081200Z
you should not use copy-var with add-low-makro
borkdude 2021-06-01T08:53:24.081400Z
as it only copies the var metadata to the sci var
borkdude 2021-06-01T08:56:49.081900Z
@markus.agwin So:
scittle.makro-plugin=> (defn add-low-fn [_env _form x y & zs] `(str "__" ~x ~y ~@zs))
#'scittle.makro-plugin/add-low-fn
scittle.makro-plugin=> (sci/eval-string "(add-low-makro 1 2 3 4)" {:bindings {'add-low-makro (with-meta add-low-fn {:sci/macro true})}})
"__1234"borkdude 2021-06-01T08:59:17.082300Z
This also works:
scittle.makro-plugin=> (defn ^:macro add-low-fn [_env _form x y & zs] `(str "__" ~x ~y ~@zs))
#'scittle.makro-plugin/add-low-fn
scittle.makro-plugin=> (sci/eval-string "(add-low-makro 1 2 3 4)" {:bindings {'add-low-makro (sci/copy-var add-low-fn rns)}})
"__1234"Markus Agwin 2021-06-01T09:28:55.082500Z
Great! For the record, this works now:
(ns scittle.makro-plugin
(:require
[sci.core :as sci]
[scittle.core :as scittle]))
(defn add-low-fn [_env _form x y] `(str "_" ~x ~y))
(defn ^:macro add-low-makro [_env _form x y] (add-low-fn _env _form x y))
(def rns (sci/create-ns 'makro-plugin.core nil))
(def makro-plugin-namespace
{'add-low-fn (sci/copy-var add-low-fn rns)
'add-low-makro (sci/copy-var add-low-makro rns)})
(scittle/register-plugin!
::makro-plugin
{:namespaces {'makro-plugin.core makro-plugin-namespace}})borkdude 2021-06-01T09:30:20.082700Z
:thumbsup:
Markus Agwin 2021-06-01T13:45:42.082900Z
@borkdude is env meant to be empty when I print it via
(defn add-low-fn [form env x y]
`(str "_ form: " ~(str form) " env: " ~(str env) ~x ~y))borkdude 2021-06-01T13:47:52.083100Z
it depends where you call it from
borkdude 2021-06-01T13:48:00.083300Z
it contains the locals
borkdude 2021-06-01T13:48:26.083500Z
these arguments are called &form and &env in normal Clojure macros
Markus Agwin 2021-06-01T14:00:05.083800Z
But in this specific Scittle example I cannot improve my code to (for example) have the name of some namespace appear via (:name (:ns env)), right?
borkdude 2021-06-01T14:01:55.084Z
Maybe this example helps? https://gist.github.com/borkdude/c97da85da67c7bcc5671765aef5a89ad
Markus Agwin 2021-06-01T14:19:44.084200Z
that helps, thank you!