Add "minimum_runtime" option to Python target settings

examples/package.toml

@@ -2,3 +2,4 @@ version = "0.3.0"
 
 [targets.python]
 name = "nirum-examples"
+minimum_runtime = "0.3.9"

src/Nirum/Package/Metadata.hs

@@ -39,6 +39,7 @@ module Nirum.Package.Metadata ( Author (Author, email, name, uri)
                               , readMetadata
                               , stringField
                               , tableField
+                              , versionField
                               ) where
 
 import Data.Proxy (Proxy (Proxy))

src/Nirum/Targets/Python.hs

@@ -30,6 +30,7 @@ module Nirum.Targets.Python ( Code
                             , insertLocalImport
                             , insertStandardImport
                             , insertThirdPartyImports
+                            , minimumRuntime
                             , runCodeGen
                             , stringLiteral
                             , toAttributeName
@@ -104,6 +105,7 @@ import Nirum.Package ( BoundModule
                      )
 import Nirum.Package.Metadata ( Author (Author, name, email)
                               , Metadata (authors, target, version)
+                              , MetadataError (FieldError)
                               , Target ( CompileError
                                        , CompileResult
                                        , compilePackage
@@ -113,11 +115,16 @@ import Nirum.Package.Metadata ( Author (Author, name, email)
                                        , toByteString
                                        )
                               , stringField
+                              , versionField
                               )
 import qualified Nirum.Package.ModuleSet as MS
 
-newtype Python = Python { packageName :: T.Text
-                        } deriving (Eq, Ord, Show, Typeable)
+minimumRuntime :: SV.Version
+minimumRuntime = SV.version 0 3 9 [] []
+
+data Python = Python { packageName :: T.Text
+                     , minimumRuntimeVersion :: SV.Version
+                     } deriving (Eq, Ord, Show, Typeable)
 
 type Package' = Package Python
 type CompileError' = T.Text
@@ -900,7 +907,7 @@ setup(
     package_dir=\{'': SOURCE_ROOT},
     packages=[$pPackages],
     provides=[$pPackages],
-    requires=[$pInstallRequires],
+    requires=[$pRequires],
     setup_requires=setup_requires,
     install_requires=install_requires,
     extras_require=extras_require,
@@ -924,8 +931,17 @@ setup(
                             ]
     pPackages :: Code
     pPackages = strings $ toImportPaths $ MS.keysSet $ modules package
+    runtimeVer :: SV.Version
+    runtimeVer = minimumRuntimeVersion $ target metadata'
+    pRequires :: Code
+    pRequires = strings $ S.toList deps
     pInstallRequires :: Code
-    pInstallRequires = strings $ S.toList deps
+    pInstallRequires = strings
+        [ case p of
+              "nirum" -> [qq|nirum >= {SV.toText runtimeVer}|]
+              p' -> p'
+        | p <- S.toList deps
+        ]
     pPolyfillRequires :: Code
     pPolyfillRequires = T.intercalate ", "
         [ [qq|($major, $minor): [{strings $ S.toList deps'}]|]
@@ -988,7 +1004,12 @@ instance Target Python where
     targetName _ = "python"
     parseTarget table = do
         name' <- stringField "name" table
-        return Python { packageName = name' }
+        minRuntime <- case versionField "minimum_runtime" table of
+            Left (FieldError _) -> Right minimumRuntime
+            otherwise' -> otherwise'
+        return Python { packageName = name'
+                      , minimumRuntimeVersion = max minRuntime minimumRuntime
+                      }
     compilePackage = compilePackage'
     showCompileError _ e = e
     toByteString _ = encodeUtf8

test/Nirum/Package/MetadataSpec.hs

@@ -37,6 +37,7 @@ import Nirum.Package.Metadata ( Metadata (Metadata, version)
                               , readFromPackage
                               , readMetadata
                               , stringField
+                              , versionField
                               )
 
 stripPrefix :: String -> String
@@ -174,6 +175,21 @@ spec =
             stringField "bar" table `shouldBe`
                 Left (FieldTypeError "bar" "string" "integer (1)")
             stringField "qux" table `shouldBe` Left (FieldError "qux")
+        specify "versionField" $ do
+            let Right table = parseTomlDoc "<string>"
+                                           [q|a = "1.0.0"
+                                              b = "1.2.3"
+                                              c = "1.0"
+                                              d = 1.0
+                                              e = "1.2.3.4"|]
+            versionField "a" table `shouldBe` Right (SV.version 1 0 0 [] [])
+            versionField "b" table `shouldBe` Right (SV.version 1 2 3 [] [])
+            versionField "c" table `shouldBe` Left (FieldValueError "c"
+                "expected a semver string (e.g. \"1.2.3\"), not \"1.0\"")
+            versionField "d" table `shouldBe`
+                Left (FieldTypeError "d" "string" "float (1.0)")
+            versionField "e" table `shouldBe` Left (FieldValueError "e"
+                "expected a semver string (e.g. \"1.2.3\"), not \"1.2.3.4\"")
   where
     parse :: Text -> Either MetadataError (Metadata DummyTarget)
     parse = parseMetadata "<string>"

test/Nirum/PackageSpec.hs

@@ -45,7 +45,7 @@ import Nirum.Package.ModuleSet ( ImportError (MissingModulePathError)
                                )
 import Nirum.Package.ModuleSetSpec (validModules)
 import Nirum.Parser (parseFile)
-import Nirum.Targets.Python (Python (Python))
+import Nirum.Targets.Python (Python (Python), minimumRuntime)
 
 createPackage :: Metadata t -> [(ModulePath, Module)] -> Package t
 createPackage metadata' modules' =
@@ -61,7 +61,7 @@ createValidPackage t = createPackage Metadata { version = SV.initial
 
 spec :: Spec
 spec = do
-    testPackage (Python "nirum-examples")
+    testPackage (Python "nirum-examples" minimumRuntime)
     testPackage DummyTarget
 
 testPackage :: forall t . Target t => t -> Spec

test/Nirum/Targets/PythonSpec.hs

@@ -59,15 +59,16 @@ import Nirum.Targets.Python ( Source (Source)
                             , addOptionalDependency
                             , compilePrimitiveType
                             , compileTypeExpression
+                            , insertLocalImport
+                            , insertStandardImport
+                            , insertThirdPartyImports
+                            , minimumRuntime
+                            , runCodeGen
                             , stringLiteral
                             , toAttributeName
                             , toClassName
                             , toNamePair
                             , unionInstallRequires
-                            , insertLocalImport
-                            , insertStandardImport
-                            , insertThirdPartyImports
-                            , runCodeGen
                             )
 
 codeGen :: a -> CodeGen a
@@ -89,7 +90,7 @@ makeDummySource' pathPrefix m =
                     , uri = Nothing
                     }
               ]
-        , target = Python "sample-package"
+        , target = Python "sample-package" minimumRuntime
         }
     pkg :: Package Python
     pkg = createPackage