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|
(.module:
[lux (#- Name)
["." host (#+ import:)]
[abstract
[codec (#+ Codec)]
[monad (#+ do)]]
[control
["." io (#+ IO)]
["." try (#+ Try)]
["." exception (#+ Exception exception:)]
["<>" parser
["<.>" xml (#+ Parser)]]]
[data
["." binary (#+ Binary)]
["." name]
["." maybe]
[text
["%" format (#+ format)]
["." encoding]]
[number
["." i64]
["n" nat]]
[format
["." xml (#+ Tag XML)]]
[collection
["." dictionary (#+ Dictionary)]
["." set]]]
[world
[net (#+ URL)
["." uri]]]]
["." // (#+ Repository Dependency)
["/#" // #_
["/" profile]
["#." hash]
["#." pom]
["#." artifact
["#/." extension]]]])
(import: java/lang/String)
(import: java/lang/AutoCloseable
(close [] #io #try void))
(import: java/io/InputStream)
(import: java/net/URL
(new [java/lang/String])
(openStream [] #io #try java/io/InputStream))
(import: java/io/BufferedInputStream
(new [java/io/InputStream])
(read [[byte] int int] #io #try int))
(def: buffer-size
(n.* 512 1,024))
(def: (download url)
(-> URL (IO (Try Binary)))
(do {@ (try.with io.monad)}
[input (|> (java/net/URL::new url)
java/net/URL::openStream
(:: @ map (|>> java/io/BufferedInputStream::new)))
#let [buffer (binary.create ..buffer-size)]]
(loop [output (:: binary.monoid identity)]
(do @
[bytes-read (java/io/BufferedInputStream::read buffer +0 (.int ..buffer-size) input)]
(case bytes-read
-1 (do @
[_ (java/lang/AutoCloseable::close input)]
(wrap output))
_ (if (n.= ..buffer-size bytes-read)
(recur (:: binary.monoid compose output buffer))
(do @
[chunk (:: io.monad wrap (binary.slice 0 (.nat bytes-read) buffer))]
(recur (:: binary.monoid compose output chunk)))))))))
(template [<name>]
[(exception: #export (<name> {dependency Dependency} {hash Text})
(let [artifact (get@ #//.artifact dependency)
type (get@ #//.type dependency)]
(exception.report
["Artifact" (format (get@ #///artifact.group artifact)
" " (get@ #///artifact.name artifact)
" " (get@ #///artifact.version artifact))]
["Type" (%.text type)]
["Hash" (%.text hash)])))]
[sha1-does-not-match]
[md5-does-not-match]
)
(type: #export Package
{#library Binary
#pom XML
#dependencies (List Dependency)
#sha1 Text
#md5 Text})
(def: (verified-hash dependency library url hash codec exception)
(All [h]
(-> Dependency Binary URL
(-> Binary (///hash.Hash h)) (Codec Text (///hash.Hash h))
(Exception [Dependency Text])
(IO (Try Text))))
(do (try.with io.monad)
[#let [expected (hash library)]
actual (..download url)]
(:: io.monad wrap
(do try.monad
[output (encoding.from-utf8 actual)
actual (:: codec decode output)
_ (exception.assert exception [dependency output]
(:: ///hash.equivalence = expected actual))]
(wrap output)))))
(def: #export (resolve repository dependency)
(-> Repository Dependency (IO (Try Package)))
(let [[artifact type] dependency
prefix (format repository uri.separator (///artifact.path artifact))]
(do (try.with io.monad)
[library (..download (format prefix (///artifact/extension.extension type)))
sha1 (..verified-hash dependency library (format prefix ///artifact/extension.sha1) ///hash.sha1 ///hash.sha1-codec ..sha1-does-not-match)
md5 (..verified-hash dependency library (format prefix ///artifact/extension.md5) ///hash.md5 ///hash.md5-codec ..md5-does-not-match)
pom (..download (format prefix ///artifact/extension.pom))]
(:: io.monad wrap
(do try.monad
[pom (encoding.from-utf8 pom)
pom (:: xml.codec decode pom)
profile (<xml>.run ///pom.parser pom)]
(wrap {#library library
#pom pom
#dependencies (set.to-list (get@ #/.dependencies profile))
#sha1 sha1
#md5 md5}))))))
(type: #export Resolution
(Dictionary Dependency Package))
(def: #export empty
Resolution
(dictionary.new //.hash))
(exception: #export (cannot-resolve {dependency Dependency})
(let [artifact (get@ #//.artifact dependency)
type (get@ #//.type dependency)]
(exception.report
["Artifact" (%.text (///artifact.format artifact))]
["Type" (%.text type)])))
(def: (resolve-any repositories dependency)
(-> (List Repository) Dependency (IO (Try Package)))
(case repositories
#.Nil
(|> dependency
(exception.throw ..cannot-resolve)
(:: io.monad wrap))
(#.Cons repository alternatives)
(do io.monad
[outcome (..resolve repository dependency)]
(case outcome
(#try.Success package)
(wrap outcome)
(#try.Failure error)
(resolve-any alternatives dependency)))))
(def: #export (resolve-all repositories dependencies resolution)
(-> (List Repository) (List Dependency) Resolution (IO (Try Resolution)))
(case dependencies
#.Nil
(:: (try.with io.monad) wrap resolution)
(#.Cons head tail)
(do (try.with io.monad)
[package (case (dictionary.get head resolution)
(#.Some package)
(wrap package)
#.None
(..resolve-any repositories head))
#let [resolution (dictionary.put head package resolution)]
resolution (resolve-all repositories (get@ #dependencies package) resolution)]
(resolve-all repositories tail resolution))))
|
