Add module with an info file parser

7 files changed, 325 insertions, 87 deletions

diff --git a/Rakefile b/Rakefile
index 29f9aaf..4912b59 100644
--- a/Rakefile
+++ b/Rakefile
@@ -92,61 +92,6 @@ module SlackBuilder
     end
   end
 
-  class UniversalCtags < Updater
-    def update(version)
-      package = create_package version
-
-      uri = "https://github.com/universal-ctags/ctags/archive/#{version}/ctags-#{version}.tar.gz"
-      tarball = "slackbuilds/development/universal-ctags/ctags-#{version}.tar.gz"
-      checksum = SlackBuilder.download URI(uri), tarball
-      download = "https://download.dlackware.com/hosted-sources/universal-ctags/ctags-#{version}.tar.gz"
-
-      write_info package, downloads: [Download.new(download, checksum)]
-      update_slackbuild_version 'development/universal-ctags', version
-      sh 'scp', tarball, "#{CONFIG[:remote_path]}/universal-ctags"
-
-      commit 'development/universal-ctags', version
-    end
-
-    private
-
-    def create_package(version)
-      Package.new 'development/universal-ctags',
-        version: version,
-        homepage: 'https://ctags.io/',
-        requires: ['%README%']
-    end
-  end
-
-  class Composer < Updater
-    def update(version)
-      package = Package.new 'development/composer',
-        version: version,
-        homepage: 'https://getcomposer.org/'
-
-      uri = "https://getcomposer.org/download/#{version}/composer.phar"
-      checksum = SlackBuilder.download URI(uri), 'slackbuilds/development/composer/composer.phar'
-      write_info package, downloads: [Download.new(uri, checksum)]
-      update_slackbuild_version 'development/composer', version
-
-      commit 'development/composer', version
-    end
-  end
-
-  class JitsiMeetDesktop < Updater
-    def update(version)
-      package = Package.new 'network/jitsi-meet-desktop',
-        version: version,
-        homepage: 'https://jitsi.org/'
-      uri = "https://github.com/jitsi/jitsi-meet-electron/releases/download/v#{version}/jitsi-meet-x86_64.AppImage"
-      checksum = SlackBuilder.download URI(uri), 'slackbuilds/network/jitsi-meet-desktop/jitsi-meet-x86_64.AppImage'
-
-      write_info package, downloads: [Download.new(uri, checksum, is64: true)]
-      update_slackbuild_version 'network/jitsi-meet-desktop', version
-      commit 'network/jitsi-meet-desktop', version
-    end
-  end
-
   class PHP < Updater
     def update(version)
       package = Package.new 'development/php82',
@@ -167,15 +112,9 @@ module SlackBuilder
 end
 
 AUTO_UPDATABLE = {
-  'universal-ctags' => [SlackBuilder::GitHub.new('universal-ctags', 'ctags'), SlackBuilder::UniversalCtags.new],
-  'composer' => [SlackBuilder::Packagist.new('composer', 'composer'), SlackBuilder::Composer.new],
   'php82' => [SlackBuilder::GitHub.new('php', 'php-src', 'php'), SlackBuilder::PHP.new],
   'rdiff-backup' => [SlackBuilder::GitHub.new('rdiff-backup', 'rdiff-backup', 'rdiff-backup')],
   'librsync' => [SlackBuilder::GitHub.new('librsync', 'librsync')],
-  'jitsi-meet-desktop' => [
-    SlackBuilder::GitHub.new('jitsi', 'jitsi-meet-electron'),
-    SlackBuilder::JitsiMeetDesktop.new
-  ],
   'dmd' => [SlackBuilder::LatestText.new('https://downloads.dlang.org/releases/LATEST')]
 }.freeze
 
diff --git a/app/Main.hs b/app/Main.hs
index c82a4e9..e8cd335 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -70,6 +70,25 @@ autoUpdatable =
         , requires = mempty
         , reupload = False
         }
+    , Package
+        { latest =
+            let ghArguments = GhArguments
+                    { owner = "jitsi"
+                    , name = "jitsi-meet-electron"
+                    , transform = Nothing
+                    }
+                latest' = latestGitHub ghArguments $ Text.stripPrefix "v"
+                template = Package.DownloadTemplate
+                    $ Package.StaticPlaceholder "https://github.com/jitsi/jitsi-meet-electron/releases/download/v"
+                    :| Package.VersionPlaceholder
+                    : [Package.StaticPlaceholder "/jitsi-meet-x86_64.AppImage"]
+             in Package.Updater latest' template
+        , category = "network"
+        , name = "jitsi-meet-desktop"
+        , homepage = Just [uri|https://jitsi.org/|]
+        , requires = mempty
+        , reupload = False
+        }
     ]
 
 up2Date :: SlackBuilderT ()
@@ -134,8 +153,6 @@ main = do
     Text.IO.putStrLn $ fromMaybe "" latestVersion
   where
     executeCommand = \case
-        PackagistCommand packagistArguments ->
-            latestPackagist packagistArguments
         TextCommand textArguments -> latestText textArguments
         GhCommand ghArguments@GhArguments{ transform }
             -> latestGitHub ghArguments $ chooseTransformFunction transform
diff --git a/app/SlackBuilder/CommandLine.hs b/app/SlackBuilder/CommandLine.hs
index 48881e2..8624cb8 100644
--- a/app/SlackBuilder/CommandLine.hs
+++ b/app/SlackBuilder/CommandLine.hs
@@ -20,8 +20,7 @@ import Options.Applicative
     )
 
 data SlackBuilderCommand
-    = PackagistCommand PackagistArguments
-    | TextCommand TextArguments
+    = TextCommand TextArguments
     | GhCommand GhArguments
     | SlackBuildCommand Text Text
     | CommitCommand Text Text
@@ -47,11 +46,6 @@ data GhArguments = GhArguments
 newtype TextArguments = TextArguments Text
     deriving (Eq, Show)
 
-packagistArguments :: Parser PackagistArguments
-packagistArguments = PackagistArguments
-    <$> argument str (metavar "VENDOR")
-    <*> argument str (metavar"NAME")
-
 textArguments :: Parser TextArguments
 textArguments = TextArguments <$> argument str (metavar "URL")
 
@@ -66,8 +60,7 @@ slackBuilderParser = info slackBuilderCommand fullDesc
 
 slackBuilderCommand :: Parser SlackBuilderCommand
 slackBuilderCommand = subparser
-    $ command "packagist" (info (PackagistCommand <$> packagistArguments) mempty)
-    <> command "text" (info (TextCommand <$> textArguments) mempty)
+    $ command "text" (info (TextCommand <$> textArguments) mempty)
     <> command "github" (info (GhCommand <$> ghArguments) mempty)
     <> command "slackbuild" (info slackBuildCommand mempty)
     <> command "commit" (info commitCommand mempty)
diff --git a/lib/SlackBuilder/Info.hs b/lib/SlackBuilder/Info.hs
new file mode 100644
index 0000000..bedbc48
--- /dev/null
+++ b/lib/SlackBuilder/Info.hs
@@ -0,0 +1,156 @@
+module SlackBuilder.Info
+    ( PackageInfo(..)
+    , generate
+    , parseInfoFile
+    , update
+    , updateDownloadVersion
+    ) where
+
+import Control.Monad.Combinators (sepBy)
+import qualified Data.ByteArray as ByteArray
+import Data.ByteString (ByteString)
+import qualified Data.ByteString as ByteString
+import qualified Data.ByteString.Char8 as Char8
+import qualified Data.List.NonEmpty as NonEmpty
+import Data.Maybe (mapMaybe)
+import Data.Text (Text)
+import qualified Data.Text as Text
+import qualified Data.Text.Encoding as Text
+import qualified Data.Text.Lazy as Lazy.Text
+import qualified Data.Text.Lazy.Builder as Text.Builder
+import qualified Data.Text.Lazy.Builder as Text (Builder)
+import Crypto.Hash (Digest, MD5, digestFromByteString)
+import Data.Void (Void)
+import Data.Word (Word8)
+import Numeric (readHex, showHex)
+import Text.Megaparsec (Parsec, count, eof, takeWhile1P)
+import Text.Megaparsec.Byte (space, string, hexDigitChar)
+import Text.URI
+    ( Authority(..)
+    , URI(..)
+    , mkPathPiece
+    , parserBs
+    , render
+    , unRText
+    )
+
+type GenParser = Parsec Void ByteString
+
+data PackageInfo = PackageInfo
+    { pkgname :: String
+    , version :: Text
+    , homepage :: Text
+    , downloads :: [URI]
+    , checksums :: [Digest MD5]
+    } deriving (Eq, Show)
+
+variableEntry :: ByteString -> GenParser ByteString
+variableEntry variable = string (Char8.append variable "=\"")
+    *> takeWhile1P Nothing (0x22 /=)
+    <* string "\"\n"
+
+variableSeparator :: GenParser ()
+variableSeparator = string " \\" *> space
+
+packageDownloads :: GenParser [URI]
+packageDownloads = string "DOWNLOAD=\""
+    *> sepBy parserBs variableSeparator
+    <* string "\"\n"
+
+hexDigit :: GenParser Word8
+hexDigit =
+    let digitPair = count 2 hexDigitChar
+     in fst . head . readHex . fmap (toEnum . fromIntegral) <$> digitPair
+
+packageChecksum :: GenParser ByteString
+packageChecksum = ByteString.pack <$> count 16 hexDigit
+
+packageChecksums :: GenParser [ByteString]
+packageChecksums = string "MD5SUM=\""
+    *> sepBy packageChecksum variableSeparator
+    <* string "\"\n"
+
+parseInfoFile :: GenParser PackageInfo
+parseInfoFile = PackageInfo
+    <$> (Char8.unpack <$> variableEntry "PKGNAM")
+    <*> (Text.decodeUtf8 <$> variableEntry "VERSION")
+    <*> (Text.decodeUtf8 <$> variableEntry "HOMEPAGE")
+    <*> packageDownloads
+    <*> (mapMaybe digestFromByteString <$> packageChecksums)
+    <* eof 
+
+updateDownloadVersion :: PackageInfo -> Text -> Maybe String -> [URI]
+updateDownloadVersion package toVersion gnomeVersion
+    = updateDownload (version package) toVersion gnomeVersion
+    <$> downloads package
+
+updateDownload :: Text -> Text -> Maybe String -> URI -> URI
+updateDownload fromVersion toVersion gnomeVersion
+    = updateCoreVersion fromVersion toVersion gnomeVersion
+    . updatePackageVersion fromVersion toVersion gnomeVersion
+
+updatePackageVersion :: Text -> Text -> Maybe String -> URI -> URI
+updatePackageVersion fromVersion toVersion _gnomeVersion download = download
+    { uriPath = uriPath download >>= traverse (traverse updatePathPiece)
+    }
+  where
+    updatePathPiece = mkPathPiece
+        . Text.replace fromMajor toMajor
+        . Text.replace fromVersion toVersion
+        . unRText
+    fromMajor = major fromVersion
+    toMajor = major toVersion
+
+major :: Text -> Text
+major = Text.intercalate "." . take 2 . Text.splitOn "."
+
+updateCoreVersion :: Text -> Text -> Maybe String -> URI -> URI
+updateCoreVersion _fromVersion _toVersion (Just gnomeVersion) download
+    | Just (False, pathPieces) <- uriPath download
+    , (beforeCore, afterCore) <- NonEmpty.break (comparePathPiece "core") pathPieces
+    , _ : _ : _ : sources : afterSources <- afterCore
+    , comparePathPiece "sources" sources && not (null afterSources)
+    , Right Authority{..} <- uriAuthority download
+    , ".gnome.org" `Text.isSuffixOf` unRText authHost
+    , Nothing <- authPort =
+        download { uriPath = buildPath beforeCore afterSources }
+  where
+    comparePathPiece this that = Just that == mkPathPiece this
+    buildPath beforeCore afterSources = do
+        core <- mkPathPiece "core"
+        let textGnomeVersion = Text.pack gnomeVersion
+        minorGnomeVersion <- mkPathPiece $ major textGnomeVersion
+        patchGnomeVersion <- mkPathPiece textGnomeVersion
+        sources <- mkPathPiece "sources"
+        let afterCore = core : minorGnomeVersion : patchGnomeVersion : sources : afterSources
+        (False,) <$> NonEmpty.nonEmpty (beforeCore ++ afterCore)
+updateCoreVersion _ _ _ download = download            
+
+update :: PackageInfo -> Text -> [URI] -> [Digest MD5] -> PackageInfo
+update old toVersion downloads' checksums' = old
+    { version = toVersion
+    , downloads = downloads'
+    , checksums = checksums'
+    }
+
+generate :: PackageInfo -> Text
+generate pkg = Lazy.Text.toStrict $ Text.Builder.toLazyText builder
+  where
+    digestToText = Text.pack . foldr hexAppender "" . ByteArray.unpack
+    hexAppender x acc
+      | x > 15 = showHex x acc
+      | otherwise = '0' : showHex x acc
+    builder = "PKGNAM=\"" <> Text.Builder.fromString (pkgname pkg) <> "\"\n"
+        <> "VERSION=\"" <> Text.Builder.fromText (version pkg) <> "\"\n"
+        <> "HOMEPAGE=\"" <> Text.Builder.fromText (homepage pkg) <> "\"\n"
+        <> generateMultiEntry "DOWNLOAD" (render <$> downloads pkg)
+        <> generateMultiEntry "MD5SUM" (digestToText <$> checksums pkg)
+
+generateMultiEntry :: Text -> [Text] -> Text.Builder
+generateMultiEntry name entries = Text.Builder.fromText name
+    <> "=\""
+    <> Text.Builder.fromText (Text.intercalate separator entries)
+    <> "\"\n"
+  where
+    padLength = Text.length name + 2
+    separator = " \\\n" <> Text.replicate padLength " "
diff --git a/lib/up2date.rb b/lib/up2date.rb
index d9eab15..5d63da3 100644
--- a/lib/up2date.rb
+++ b/lib/up2date.rb
@@ -35,20 +35,6 @@ module SlackBuilder
     end
   end
 
-  # Request the latest version from the packagist API.
-  class Packagist < Repository
-    def initialize(vendor, name)
-      super()
-
-      @vendor = vendor
-      @name = name
-    end
-
-    def latest
-      `./bin/slackbuilder packagist #{@vendor} #{@name}`.strip
-    end
-  end
-
   # Reads a remote LATEST file.
   class LatestText < Repository
     def initialize(latest_url)
diff --git a/slackbuilder.cabal b/slackbuilder.cabal
index b56c39d..0a7cdb5 100644
--- a/slackbuilder.cabal
+++ b/slackbuilder.cabal
@@ -18,9 +18,13 @@ extra-source-files: CHANGELOG.md
 common dependencies
   build-depends:
     base ^>= 4.16.4.0,
+    bytestring ^>= 0.11.0,
     cryptonite >= 0.30,
     filepath ^>= 1.4.2,
+    megaparsec ^>= 9.5,
     modern-uri ^>= 0.3.6,
+    memory ^>= 0.18,
+    parser-combinators ^>= 1.3,
     text ^>= 2.0,
     tomland ^>= 1.3.3,
     transformers ^>= 0.5.6
@@ -28,18 +32,21 @@ common dependencies
   default-extensions:
     DataKinds
     DuplicateRecordFields
+    ExplicitForAll
     LambdaCase
     NamedFieldPuns
     OverloadedStrings
     RecordWildCards
     QuasiQuotes
     TemplateHaskell
+    TupleSections
     TypeApplications
 
 library
   import: dependencies
   exposed-modules:
     SlackBuilder.Config
+    SlackBuilder.Info
     SlackBuilder.Package
     SlackBuilder.Trans
   hs-source-dirs: lib
@@ -58,7 +65,6 @@ executable slackbuilder
     SlackBuilder.Updater
   build-depends:
     aeson ^>= 2.2.0,
-    bytestring ^>= 0.11.0,
     conduit ^>= 1.3.5,
     http-client ^>= 0.7,
     optparse-applicative ^>= 0.18.1,
@@ -77,10 +83,12 @@ test-suite slackbuilder-test
   main-is: Spec.hs
 
   other-modules:
+    SlackBuilder.InfoSpec
     SlackBuilder.PackageSpec
   hs-source-dirs: tests
   build-depends:
     hspec >= 2.10.9 && < 2.12,
+    hspec-megaparsec ^>= 2.2,
     slackbuilder
 
   ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
diff --git a/tests/SlackBuilder/InfoSpec.hs b/tests/SlackBuilder/InfoSpec.hs
new file mode 100644
index 0000000..28167b5
--- /dev/null
+++ b/tests/SlackBuilder/InfoSpec.hs
@@ -0,0 +1,139 @@
+module SlackBuilder.InfoSpec
+    ( spec
+    ) where
+
+import Crypto.Hash (Digest, MD5, digestFromByteString)
+import qualified Data.ByteString as ByteString
+import Data.ByteString.Char8 (ByteString)
+import Data.Maybe (maybeToList)
+import qualified Data.Text.Encoding as Text
+import Data.Void (Void)
+import SlackBuilder.Info
+import Test.Hspec (Spec, describe, it, shouldBe)
+import Test.Hspec.Megaparsec (parseSatisfies, shouldSucceedOn)
+import Text.Megaparsec (parse)
+import Text.Megaparsec.Error (ParseErrorBundle)
+import Text.URI (mkURI)
+
+parseInfoFile'
+    :: ByteString
+    -> Either (ParseErrorBundle ByteString Void) PackageInfo
+parseInfoFile' = parse parseInfoFile ""
+
+infoDownload0 :: ByteString
+infoDownload0 = "PKGNAM=\"pkgnam\"\n\
+    \VERSION=\"1.2.3\"\n\
+    \HOMEPAGE=\"homepage\"\n\
+    \DOWNLOAD=\"\"\n\
+    \MD5SUM=\"\"\n"
+
+infoDownload1 :: ByteString
+infoDownload1 = "PKGNAM=\"pkgnam\"\n\
+    \VERSION=\"1.2.3\"\n\
+    \HOMEPAGE=\"homepage\"\n\
+    \DOWNLOAD=\"https://dlackware.com/download.tar.gz\"\n\
+    \MD5SUM=\"0102030405060708090a0b0c0d0e0f10\"\n"
+
+maybeToDoubleList :: forall a. Maybe a -> [a]
+maybeToDoubleList xs = [y | x <- maybeToList xs, y <- [x, x]]
+
+checksumSample :: [Digest MD5]
+checksumSample = maybeToList $ digestFromByteString (ByteString.pack [1 .. 16])
+
+spec :: Spec
+spec = do
+    describe "parseInfoFile" $ do
+        it "returns package on a valid input" $
+            parseInfoFile' `shouldSucceedOn` infoDownload1
+
+        it "returns an array with one element if one download is given" $
+            let condition = (== 1) . length . checksums
+             in parseInfoFile' infoDownload1 `parseSatisfies` condition
+
+        it "translates checksum characters into the binary format" $
+            let expected = "0102030405060708090a0b0c0d0e0f10"
+                condition = (== expected) . show . head . checksums
+             in parseInfoFile' infoDownload1 `parseSatisfies` condition
+
+        it "accepts an empty downloads list" $
+            parseInfoFile' `shouldSucceedOn` infoDownload0
+
+    describe "generate" $ do
+        it "generates an .info file without downloads" $
+            let given =  PackageInfo "pkgnam" "1.2.3" "homepage" [] []
+             in generate given `shouldBe` Text.decodeUtf8 infoDownload0
+
+        it "splits multiple downloads into multiple lines" $
+            let downloads' = maybeToDoubleList
+                    $ mkURI "https://dlackware.com/download.tar.gz"
+                checksums' = maybeToDoubleList
+                    $ digestFromByteString (ByteString.pack [1.. 16])
+                given = PackageInfo
+                    "pkgnam" "1.2.3" "homepage" downloads' checksums'
+                expected = "PKGNAM=\"pkgnam\"\n\
+                    \VERSION=\"1.2.3\"\n\
+                    \HOMEPAGE=\"homepage\"\n\
+                    \DOWNLOAD=\"https://dlackware.com/download.tar.gz \\\n\
+                    \          https://dlackware.com/download.tar.gz\"\n\
+                    \MD5SUM=\"0102030405060708090a0b0c0d0e0f10 \\\n\
+                    \        0102030405060708090a0b0c0d0e0f10\"\n"
+             in generate given `shouldBe` expected
+
+        it "prints the checksum as a sequence of hexadecimal numbers" $
+            let downloads' = maybeToList
+                    $ mkURI "https://dlackware.com/download.tar.gz"
+                given = PackageInfo
+                    "pkgnam" "1.2.3" "homepage" downloads' checksumSample
+             in generate given `shouldBe` Text.decodeUtf8 infoDownload1
+
+    describe "updateDownloadVersion" $ do
+        it "replaces the version" $
+            let downloads' = maybeToList
+                    $ mkURI "https://dlackware.com/download-1.2.3.tar.gz"
+                testPackage = PackageInfo
+                    "pkgnam" "1.2.3" "homepage" downloads' checksumSample
+                expected = maybeToList
+                    $ mkURI "https://dlackware.com/download-2.3.4.tar.gz"
+                actual = updateDownloadVersion testPackage "2.3.4" Nothing
+             in actual `shouldBe` expected
+
+        it "updates the major version" $
+            let downloads' = maybeToList
+                    $ mkURI "https://dlackware.com/1.2/download.tar.gz"
+                testPackage = PackageInfo
+                    "pkgnam" "1.2.3" "homepage" downloads' checksumSample
+                expected = maybeToList
+                    $ mkURI "https://dlackware.com/2.3/download.tar.gz"
+                actual = updateDownloadVersion testPackage "2.3.4" Nothing
+             in actual `shouldBe` expected
+
+        it "updates gnome version" $
+            let downloads' = maybeToList
+                    $ mkURI "https://download.gnome.org/core/3.36/3.36.0/sources/gnome-calendar-3.36.0.tar.xz"
+                testPackage = PackageInfo
+                    "gnome-calendar" "3.36.0" "https://wiki.gnome.org/Core/Calendar" downloads' checksumSample
+                expected = maybeToList
+                    $ mkURI "https://download.gnome.org/core/3.36/3.36.4/sources/gnome-calendar-3.36.2.tar.xz"
+                actual = updateDownloadVersion testPackage "3.36.2" $ Just "3.36.4"
+             in actual `shouldBe` expected
+
+        it "updates versions without a patch number" $
+            let downloads' = maybeToList
+                    $ mkURI "https://dlackware.com/gnome-contacts-3.36.tar.xz"
+                testPackage = PackageInfo
+                    "gnome-contacts" "3.36" "homepage" downloads' checksumSample
+                expected = maybeToList
+                    $ mkURI "https://dlackware.com/gnome-contacts-3.36.2.tar.xz"
+                actual = updateDownloadVersion testPackage "3.36.2" Nothing
+             in actual `shouldBe` expected
+
+    describe "update" $
+        it "replaces the version" $
+            let downloads' = maybeToList
+                    $ mkURI "https://dlackware.com/1.2/download.tar.gz"
+                testPackage = PackageInfo
+                    "pkgnam" "1.2.3" "homepage" downloads' checksumSample
+                expected = PackageInfo
+                    "pkgnam" "2.3.4" "homepage" downloads' checksumSample
+                given = update testPackage "2.3.4" downloads' checksumSample
+             in given `shouldBe` expected