Cabal-2.0.0.2: A framework for packaging Haskell software

CopyrightIsaac Jones Simon Marlow 2003-2004
Duncan Coutts 2008
LicenseBSD3
Maintainercabal-devel@haskell.org
Portabilityportable
Safe HaskellNone
LanguageHaskell2010

Distribution.Version

Contents

Description

Exports the Version type along with a parser and pretty printer. A version is something like "1.3.3". It also defines the VersionRange data types. Version ranges are like ">= 1.2 && < 2".

Synopsis

Package versions

data Version Source #

A Version represents the version of a software entity.

Instances of Eq and Ord are provided, which gives exact equality and lexicographic ordering of the version number components (i.e. 2.1 > 2.0, 1.2.3 > 1.2.2, etc.).

This type is opaque and distinct from the Version type in Data.Version since Cabal-2.0. The difference extends to the Binary instance using a different (and more compact) encoding.

Since: 2.0

Instances

Eq Version Source # 

Methods

(==) :: Version -> Version -> Bool #

(/=) :: Version -> Version -> Bool #

Data Version Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Version -> c Version #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Version #

toConstr :: Version -> Constr #

dataTypeOf :: Version -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c Version) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Version) #

gmapT :: (forall b. Data b => b -> b) -> Version -> Version #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Version -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Version -> r #

gmapQ :: (forall d. Data d => d -> u) -> Version -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Version -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Version -> m Version #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Version -> m Version #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Version -> m Version #

Ord Version Source # 
Read Version Source # 
Show Version Source # 
Generic Version Source # 

Associated Types

type Rep Version :: * -> * #

Methods

from :: Version -> Rep Version x #

to :: Rep Version x -> Version #

Binary Version Source # 

Methods

put :: Version -> Put #

get :: Get Version #

putList :: [Version] -> Put #

NFData Version Source # 

Methods

rnf :: Version -> () #

Text Version Source # 
type Rep Version Source # 

mkVersion :: [Int] -> Version Source #

Construct Version from list of version number components.

For instance, mkVersion [3,2,1] constructs a Version representing the version 3.2.1.

All version components must be non-negative. mkVersion [] currently represents the special null version; see also nullVersion.

Since: 2.0

mkVersion' :: Version -> Version Source #

Variant of Version which converts a Data.Version Version into Cabal's Version type.

Since: 2.0

versionNumbers :: Version -> [Int] Source #

Unpack Version into list of version number components.

This is the inverse to mkVersion, so the following holds:

(versionNumbers . mkVersion) vs == vs

Since: 2.0

nullVersion :: Version Source #

Constant representing the special null Version

The nullVersion compares (via Ord) as less than every proper Version value.

Since: 2.0

alterVersion :: ([Int] -> [Int]) -> Version -> Version Source #

Apply function to list of version number components

alterVersion f == mkVersion . f . versionNumbers

Since: 2.0

Backwards compatibility

Version ranges

data VersionRange Source #

Instances

Eq VersionRange Source # 
Data VersionRange Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> VersionRange -> c VersionRange #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c VersionRange #

toConstr :: VersionRange -> Constr #

dataTypeOf :: VersionRange -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c VersionRange) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c VersionRange) #

gmapT :: (forall b. Data b => b -> b) -> VersionRange -> VersionRange #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> VersionRange -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> VersionRange -> r #

gmapQ :: (forall d. Data d => d -> u) -> VersionRange -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> VersionRange -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> VersionRange -> m VersionRange #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> VersionRange -> m VersionRange #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> VersionRange -> m VersionRange #

Read VersionRange Source # 
Show VersionRange Source # 
Generic VersionRange Source # 

Associated Types

type Rep VersionRange :: * -> * #

Binary VersionRange Source # 
NFData VersionRange Source # 

Methods

rnf :: VersionRange -> () #

Text VersionRange Source # 
type Rep VersionRange Source # 
type Rep VersionRange = D1 * (MetaData "VersionRange" "Distribution.Version" "Cabal-2.0.0.2-2Zlp9pb6VMT53EjzrKmvLM" False) ((:+:) * ((:+:) * ((:+:) * (C1 * (MetaCons "AnyVersion" PrefixI False) (U1 *)) (C1 * (MetaCons "ThisVersion" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Version)))) ((:+:) * (C1 * (MetaCons "LaterVersion" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Version))) (C1 * (MetaCons "EarlierVersion" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Version))))) ((:+:) * ((:+:) * (C1 * (MetaCons "WildcardVersion" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Version))) (C1 * (MetaCons "MajorBoundVersion" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * Version)))) ((:+:) * (C1 * (MetaCons "UnionVersionRanges" PrefixI False) ((:*:) * (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * VersionRange)) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * VersionRange)))) ((:+:) * (C1 * (MetaCons "IntersectVersionRanges" PrefixI False) ((:*:) * (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * VersionRange)) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * VersionRange)))) (C1 * (MetaCons "VersionRangeParens" PrefixI False) (S1 * (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 * VersionRange)))))))

Constructing

anyVersion :: VersionRange Source #

The version range -any. That is, a version range containing all versions.

withinRange v anyVersion = True

noVersion :: VersionRange Source #

The empty version range, that is a version range containing no versions.

This can be constructed using any unsatisfiable version range expression, for example > 1 && < 1.

withinRange v noVersion = False

thisVersion :: Version -> VersionRange Source #

The version range == v

withinRange v' (thisVersion v) = v' == v

notThisVersion :: Version -> VersionRange Source #

The version range || v

withinRange v' (notThisVersion v) = v' /= v

laterVersion :: Version -> VersionRange Source #

The version range > v

withinRange v' (laterVersion v) = v' > v

earlierVersion :: Version -> VersionRange Source #

The version range < v

withinRange v' (earlierVersion v) = v' < v

orLaterVersion :: Version -> VersionRange Source #

The version range >= v

withinRange v' (orLaterVersion v) = v' >= v

orEarlierVersion :: Version -> VersionRange Source #

The version range <= v

withinRange v' (orEarlierVersion v) = v' <= v

unionVersionRanges :: VersionRange -> VersionRange -> VersionRange Source #

The version range vr1 || vr2

  withinRange v' (unionVersionRanges vr1 vr2)
= withinRange v' vr1 || withinRange v' vr2

intersectVersionRanges :: VersionRange -> VersionRange -> VersionRange Source #

The version range vr1 && vr2

  withinRange v' (intersectVersionRanges vr1 vr2)
= withinRange v' vr1 && withinRange v' vr2

differenceVersionRanges :: VersionRange -> VersionRange -> VersionRange Source #

The difference of two version ranges

  withinRange v' (differenceVersionRanges vr1 vr2)
= withinRange v' vr1 && not (withinRange v' vr2)

Since: 1.24.1.0

invertVersionRange :: VersionRange -> VersionRange Source #

The inverse of a version range

  withinRange v' (invertVersionRange vr)
= not (withinRange v' vr)

withinVersion :: Version -> VersionRange Source #

The version range == v.*.

For example, for version 1.2, the version range == 1.2.* is the same as >= 1.2 && < 1.3

withinRange v' (laterVersion v) = v' >= v && v' < upper v
  where
    upper (Version lower t) = Version (init lower ++ [last lower + 1]) t

majorBoundVersion :: Version -> VersionRange Source #

The version range ^>= v.

For example, for version 1.2.3.4, the version range ^>= 1.2.3.4 is the same as >= 1.2.3.4 && < 1.3.

Note that ^>= 1 is equivalent to >= 1 && < 1.1.

since 2.0

betweenVersionsInclusive :: Version -> Version -> VersionRange Source #

Deprecated: In practice this is not very useful because we normally use inclusive lower bounds and exclusive upper bounds

Inspection

withinRange :: Version -> VersionRange -> Bool Source #

Does this version fall within the given range?

This is the evaluation function for the VersionRange type.

isAnyVersion :: VersionRange -> Bool Source #

Does this VersionRange place any restriction on the Version or is it in fact equivalent to AnyVersion.

Note this is a semantic check, not simply a syntactic check. So for example the following is True (for all v).

isAnyVersion (EarlierVersion v `UnionVersionRanges` orLaterVersion v)

isNoVersion :: VersionRange -> Bool Source #

This is the converse of isAnyVersion. It check if the version range is empty, if there is no possible version that satisfies the version range.

For example this is True (for all v):

isNoVersion (EarlierVersion v `IntersectVersionRanges` LaterVersion v)

isSpecificVersion :: VersionRange -> Maybe Version Source #

Is this version range in fact just a specific version?

For example the version range ">= 3 && <= 3" contains only the version 3.

simplifyVersionRange :: VersionRange -> VersionRange Source #

Simplify a VersionRange expression. For non-empty version ranges this produces a canonical form. Empty or inconsistent version ranges are left as-is because that provides more information.

If you need a canonical form use fromVersionIntervals . toVersionIntervals

It satisfies the following properties:

withinRange v (simplifyVersionRange r) = withinRange v r
    withinRange v r = withinRange v r'
==> simplifyVersionRange r = simplifyVersionRange r'
 || isNoVersion r
 || isNoVersion r'

foldVersionRange Source #

Arguments

:: a

"-any" version

-> (Version -> a)
"== v"
-> (Version -> a)
"> v"
-> (Version -> a)
"< v"
-> (a -> a -> a)

"_ || _" union

-> (a -> a -> a)

"_ && _" intersection

-> VersionRange 
-> a 

Fold over the basic syntactic structure of a VersionRange.

This provides a syntactic view of the expression defining the version range. The syntactic sugar ">= v", "<= v" and "== v.*" is presented in terms of the other basic syntax.

For a semantic view use asVersionIntervals.

foldVersionRange' Source #

Arguments

:: a

"-any" version

-> (Version -> a)
"== v"
-> (Version -> a)
"> v"
-> (Version -> a)
"< v"
-> (Version -> a)
">= v"
-> (Version -> a)
"<= v"
-> (Version -> Version -> a)

"== v.*" wildcard. The function is passed the inclusive lower bound and the exclusive upper bounds of the range defined by the wildcard.

-> (Version -> Version -> a)

"^>= v" major upper bound The function is passed the inclusive lower bound and the exclusive major upper bounds of the range defined by this operator.

-> (a -> a -> a)

"_ || _" union

-> (a -> a -> a)

"_ && _" intersection

-> (a -> a)

"(_)" parentheses

-> VersionRange 
-> a 

An extended variant of foldVersionRange that also provides a view of the expression in which the syntactic sugar ">= v", "<= v" and "== v.*" is presented explicitly rather than in terms of the other basic syntax.

hasUpperBound :: VersionRange -> Bool Source #

Does the version range have an upper bound?

Since: 1.24.0.0

hasLowerBound :: VersionRange -> Bool Source #

Does the version range have an explicit lower bound?

Note: this function only considers the user-specified lower bounds, but not the implicit >=0 lower bound.

Since: 1.24.0.0

Modification

removeUpperBound :: VersionRange -> VersionRange Source #

Given a version range, remove the highest upper bound. Example: (>= 1 && < 3) || (>= 4 && < 5) is converted to (>= 1 && || (= 4).

removeLowerBound :: VersionRange -> VersionRange Source #

Given a version range, remove the lowest lower bound. Example: (>= 1 && || (= 4 && < 5) is converted to (>= 0 && || (= 4 && < 5).

Version intervals view

asVersionIntervals :: VersionRange -> [VersionInterval] Source #

View a VersionRange as a union of intervals.

This provides a canonical view of the semantics of a VersionRange as opposed to the syntax of the expression used to define it. For the syntactic view use foldVersionRange.

Each interval is non-empty. The sequence is in increasing order and no intervals overlap or touch. Therefore only the first and last can be unbounded. The sequence can be empty if the range is empty (e.g. a range expression like && 2).

Other checks are trivial to implement using this view. For example:

isNoVersion vr | [] <- asVersionIntervals vr = True
               | otherwise                   = False
isSpecificVersion vr
   | [(LowerBound v  InclusiveBound
      ,UpperBound v' InclusiveBound)] <- asVersionIntervals vr
   , v == v'   = Just v
   | otherwise = Nothing

data Bound Source #

Instances

Eq Bound Source # 

Methods

(==) :: Bound -> Bound -> Bool #

(/=) :: Bound -> Bound -> Bool #

Show Bound Source # 

Methods

showsPrec :: Int -> Bound -> ShowS #

show :: Bound -> String #

showList :: [Bound] -> ShowS #

VersionIntervals abstract type

The VersionIntervals type and the accompanying functions are exposed primarily for completeness and testing purposes. In practice asVersionIntervals is the main function to use to view a VersionRange as a bunch of VersionIntervals.

data VersionIntervals Source #

A complementary representation of a VersionRange. Instead of a boolean version predicate it uses an increasing sequence of non-overlapping, non-empty intervals.

The key point is that this representation gives a canonical representation for the semantics of VersionRanges. This makes it easier to check things like whether a version range is empty, covers all versions, or requires a certain minimum or maximum version. It also makes it easy to check equality or containment. It also makes it easier to identify 'simple' version predicates for translation into foreign packaging systems that do not support complex version range expressions.

toVersionIntervals :: VersionRange -> VersionIntervals Source #

Convert a VersionRange to a sequence of version intervals.

fromVersionIntervals :: VersionIntervals -> VersionRange Source #

Convert a VersionIntervals value back into a VersionRange expression representing the version intervals.

withinIntervals :: Version -> VersionIntervals -> Bool Source #

Test if a version falls within the version intervals.

It exists mostly for completeness and testing. It satisfies the following properties:

withinIntervals v (toVersionIntervals vr) = withinRange v vr
withinIntervals v ivs = withinRange v (fromVersionIntervals ivs)

versionIntervals :: VersionIntervals -> [VersionInterval] Source #

Inspect the list of version intervals.

mkVersionIntervals :: [VersionInterval] -> Maybe VersionIntervals Source #

Directly construct a VersionIntervals from a list of intervals.

Each interval must be non-empty. The sequence must be in increasing order and no intervals may overlap or touch. If any of these conditions are not satisfied the function returns Nothing.