Stack.Types.SourceMap

A sourcemap maps a package name to how it should be built, including source code, flags, options, etc. This module contains various stages of source map construction. See the build_overview.md doc for details on these stages.

Different source map types

data SMWanted

A source map with information on the wanted (but not actual) compiler. This is derived by parsing the stack.yaml file for packages, extra-deps, their configuration (e.g., flags and options), and parsing the snapshot it refers to. It does not include global packages or any information from the command line.

Invariant: a PackageName appears in either smwProject or smwDeps, but not both.

Constructors

SMWanted

Fields

• smwCompiler :: !WantedCompiler
• smwProject :: !(Map PackageName ProjectPackage)
• smwDeps :: !(Map PackageName DepPackage)
• smwSnapshotLocation :: !RawSnapshotLocation

  Where this snapshot is loaded from.

data SMActual global

Adds in actual compiler information to SMWanted, in particular the contents of the global package database.

Invariant: a PackageName appears in only one of the Maps.

Constructors

SMActual

Fields

• smaCompiler :: !ActualCompiler
• smaProject :: !(Map PackageName ProjectPackage)
• smaDeps :: !(Map PackageName DepPackage)
• smaGlobal :: !(Map PackageName global)

data Target

How a package is intended to be built

Constructors

TargetAll !PackageType

Build all of the default components.

TargetComps !(Set NamedComponent)

Only build specific components

data PackageType

Constructors

PTProject

PTDependency

Instances

Eq PackageType

Defined in Stack.Types.SourceMap

Methods

(==) :: PackageType -> PackageType -> Bool

(/=) :: PackageType -> PackageType -> Bool

Show PackageType

Defined in Stack.Types.SourceMap

Methods

showsPrec :: Int -> PackageType -> ShowS

show :: PackageType -> String

showList :: [PackageType] -> ShowS

data SMTargets

Builds on an SMActual by resolving the targets specified on the command line, potentially adding in new dependency packages in the process.

Constructors

SMTargets

Fields

• smtTargets :: !(Map PackageName Target)
• smtDeps :: !(Map PackageName DepPackage)

data SourceMap

The final source map, taking an SMTargets and applying all command line flags and GHC options.

Constructors

SourceMap

Fields

• smTargets :: !SMTargets

  Doesn't need to be included in the hash, does not affect the source map.

• smCompiler :: !ActualCompiler

  Need to hash the compiler version _and_ its installation path. Ideally there would be some kind of output from GHC telling us some unique ID for the compiler itself.

• smProject :: !(Map PackageName ProjectPackage)

  Doesn't need to be included in hash, doesn't affect any of the packages that get stored in the snapshot database.

• smDeps :: !(Map PackageName DepPackage)

  Need to hash all of the immutable dependencies, can ignore the mutable dependencies.

• smGlobal :: !(Map PackageName GlobalPackage)

  Doesn't actually need to be hashed, implicitly captured by smCompiler. Can be broken if someone installs new global packages. We can document that as not supported, _or_ we could actually include all of this in the hash and make Stack more resilient.

Helper types

data FromSnapshot

Flag showing if package comes from a snapshot needed to ignore dependency bounds between such packages

Constructors

FromSnapshot

NotFromSnapshot

Instances

Show FromSnapshot

Defined in Stack.Types.SourceMap

Methods

showsPrec :: Int -> FromSnapshot -> ShowS

show :: FromSnapshot -> String

showList :: [FromSnapshot] -> ShowS

data DepPackage

A view of a dependency package, specified in stack.yaml

Constructors

DepPackage

Fields

• dpCommon :: !CommonPackage
• dpLocation :: !PackageLocation
• dpHidden :: !Bool

  Should the package be hidden after registering? Affects the script interpreter's module name import parser.

• dpFromSnapshot :: !FromSnapshot

  Needed to ignore bounds between snapshot packages See https://github.com/commercialhaskell/stackage/issues/3185

data ProjectPackage

A view of a project package needed for resolving components

Constructors

ProjectPackage

Fields

• ppCommon :: !CommonPackage
• ppCabalFP :: !(Path Abs File)
• ppResolvedDir :: !(ResolvedPath Dir)

data CommonPackage

Common settings for both dependency and project package.

Constructors

CommonPackage

Fields

• cpGPD :: !(IO GenericPackageDescription)
• cpName :: !PackageName
• cpFlags :: !(Map FlagName Bool)

  overrides default flags

• cpGhcOptions :: ![Text]
• cpCabalConfigOpts :: ![Text]
• cpHaddocks :: !Bool

newtype GlobalPackageVersion

Constructors

GlobalPackageVersion Version

data GlobalPackage

A view of a package installed in the global package database also could include marker for a replaced global package (could be replaced because of a replaced dependency)

Constructors

GlobalPackage !Version

ReplacedGlobalPackage ![PackageName]

Instances

Eq GlobalPackage

Defined in Stack.Types.SourceMap

Methods

(==) :: GlobalPackage -> GlobalPackage -> Bool

(/=) :: GlobalPackage -> GlobalPackage -> Bool

isReplacedGlobal :: GlobalPackage -> Bool

newtype SourceMapHash

A unique hash for the immutable portions of a SourceMap.

Constructors

SourceMapHash SHA256

smRelDir :: MonadThrow m => SourceMapHash -> m (Path Rel Dir)

Returns relative directory name with source map's hash