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(.module:
[lux (#- Module Code)
["@" target]
[abstract
[monad (#+ Monad do)]]
[control
["." try (#+ Try)]
["ex" exception (#+ Exception exception:)]
[security
["!" capability]]]
[data
["." text ("#;." hash)
["%" format (#+ format)]
["." encoding]]]
[world
["." file (#+ Path File)]
[binary (#+ Binary)]]
[type (#+ :share)]]
["." // (#+ Context Code)
["#/" // #_
[archive
[descriptor (#+ Module)]]
["#/" // (#+ Input)]]])
(template [<name>]
[(exception: #export (<name> {module Module})
(ex.report ["Module" module]))]
[cannot-find-module]
[cannot-read-module]
)
(type: #export Extension Text)
(def: lux-extension
Extension
".lux")
(def: #export (path system context module)
(All [m] (-> (file.System m) Context Module Path))
(|> module
(//.sanitize system)
(format context (:: system separator))))
(def: (find-source-file monad system contexts module extension)
(All [!]
(-> (Monad !) (file.System !) (List Context) Module Extension
(! (Try [Path (File !)]))))
(case contexts
#.Nil
(:: monad wrap (ex.throw ..cannot-find-module [module]))
(#.Cons context contexts')
(do monad
[#let [path (format (..path system context module) extension)]
file (!.use (:: system file) path)]
(case file
(#try.Success file)
(wrap (#try.Success [path file]))
(#try.Failure _)
(find-source-file monad system contexts' module extension)))))
(def: #export (find-any-source-file monad system contexts partial-host-extension module)
(All [!]
(-> (Monad !) (file.System !) (List Context) Text Module
(! (Try [Path (File !)]))))
(let [full-host-extension (format partial-host-extension lux-extension)]
(do monad
[outcome (find-source-file monad system contexts module full-host-extension)]
(case outcome
(#try.Success output)
(wrap outcome)
(#try.Failure _)
(find-source-file monad system contexts module ..lux-extension)))))
(def: #export (read monad system contexts partial-host-extension module)
(All [!]
(-> (Monad !) (file.System !) (List Context) Text Module
(! (Try Input))))
(do (try.with monad)
[## TODO: Get rid of both ":share"s ASAP
path,file (:share [!]
{(Monad !)
monad}
{(! (Try [Path (File !)]))
(find-any-source-file monad system contexts partial-host-extension module)})
#let [[path file] (:share [!]
{(Monad !)
monad}
{[Path (File !)]
path,file})]
binary (!.use (:: file content) [])]
(case (encoding.from-utf8 binary)
(#try.Success code)
(wrap {#////.module module
#////.file path
#////.hash (text;hash code)
#////.code code})
(#try.Failure _)
(:: monad wrap (ex.throw ..cannot-read-module [module])))))
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