| Copyright | Isaac Jones Simon Marlow 2003-2004 Duncan Coutts 2008 |
|---|---|
| License | BSD3 |
| Maintainer | cabal-devel@haskell.org |
| Portability | portable |
| Safe Haskell | None |
| Language | Haskell2010 |
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".
- data Version
- mkVersion :: [Int] -> Version
- mkVersion' :: Version -> Version
- versionNumbers :: Version -> [Int]
- nullVersion :: Version
- alterVersion :: ([Int] -> [Int]) -> Version -> Version
- showVersion :: Version -> String
- data VersionRange
- anyVersion :: VersionRange
- noVersion :: VersionRange
- thisVersion :: Version -> VersionRange
- notThisVersion :: Version -> VersionRange
- laterVersion :: Version -> VersionRange
- earlierVersion :: Version -> VersionRange
- orLaterVersion :: Version -> VersionRange
- orEarlierVersion :: Version -> VersionRange
- unionVersionRanges :: VersionRange -> VersionRange -> VersionRange
- intersectVersionRanges :: VersionRange -> VersionRange -> VersionRange
- differenceVersionRanges :: VersionRange -> VersionRange -> VersionRange
- invertVersionRange :: VersionRange -> VersionRange
- withinVersion :: Version -> VersionRange
- majorBoundVersion :: Version -> VersionRange
- betweenVersionsInclusive :: Version -> Version -> VersionRange
- withinRange :: Version -> VersionRange -> Bool
- isAnyVersion :: VersionRange -> Bool
- isNoVersion :: VersionRange -> Bool
- isSpecificVersion :: VersionRange -> Maybe Version
- simplifyVersionRange :: VersionRange -> VersionRange
- foldVersionRange :: a -> (Version -> a) -> (Version -> a) -> (Version -> a) -> (a -> a -> a) -> (a -> a -> a) -> VersionRange -> a
- foldVersionRange' :: a -> (Version -> a) -> (Version -> a) -> (Version -> a) -> (Version -> a) -> (Version -> a) -> (Version -> Version -> a) -> (Version -> Version -> a) -> (a -> a -> a) -> (a -> a -> a) -> (a -> a) -> VersionRange -> a
- hasUpperBound :: VersionRange -> Bool
- hasLowerBound :: VersionRange -> Bool
- removeUpperBound :: VersionRange -> VersionRange
- removeLowerBound :: VersionRange -> VersionRange
- asVersionIntervals :: VersionRange -> [VersionInterval]
- type VersionInterval = (LowerBound, UpperBound)
- data LowerBound = LowerBound Version !Bound
- data UpperBound
- data Bound
- data VersionIntervals
- toVersionIntervals :: VersionRange -> VersionIntervals
- fromVersionIntervals :: VersionIntervals -> VersionRange
- withinIntervals :: Version -> VersionIntervals -> Bool
- versionIntervals :: VersionIntervals -> [VersionInterval]
- mkVersionIntervals :: [VersionInterval] -> Maybe VersionIntervals
- unionVersionIntervals :: VersionIntervals -> VersionIntervals -> VersionIntervals
- intersectVersionIntervals :: VersionIntervals -> VersionIntervals -> VersionIntervals
- invertVersionIntervals :: VersionIntervals -> VersionIntervals
Package versions
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: 2.0.0.2
mkVersion :: [Int] -> Version #
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: 2.0.0.2
mkVersion' :: Version -> Version #
Variant of Version which converts a Data.Version Version
into Cabal's Version type.
Since: 2.0.0.2
versionNumbers :: Version -> [Int] #
nullVersion :: Version #
Constant representing the special null Version
The nullVersion compares (via Ord) as less than every proper
Version value.
Since: 2.0.0.2
alterVersion :: ([Int] -> [Int]) -> Version -> Version #
Apply function to list of version number components
alterVersion f == mkVersion . f . versionNumbers
Since: 2.0.0.2
Backwards compatibility
showVersion :: Version -> String #
Version ranges
data VersionRange #
Constructors
| AnyVersion | Deprecated: Use |
| ThisVersion Version | Deprecated: Use |
| LaterVersion Version | Deprecated: Use |
| EarlierVersion Version | Deprecated: Use |
| WildcardVersion Version | Deprecated: Use |
| MajorBoundVersion Version | |
| UnionVersionRanges VersionRange VersionRange | Deprecated: Use |
| IntersectVersionRanges VersionRange VersionRange | Deprecated: Use |
| VersionRangeParens VersionRange |
Instances
Constructing
The version range -any. That is, a version range containing all
versions.
withinRange v anyVersion = True
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 #
The version range == v
withinRange v' (thisVersion v) = v' == v
notThisVersion :: Version -> VersionRange #
The version range || v
withinRange v' (notThisVersion v) = v' /= v
laterVersion :: Version -> VersionRange #
The version range > v
withinRange v' (laterVersion v) = v' > v
earlierVersion :: Version -> VersionRange #
The version range < v
withinRange v' (earlierVersion v) = v' < v
orLaterVersion :: Version -> VersionRange #
The version range >= v
withinRange v' (orLaterVersion v) = v' >= v
orEarlierVersion :: Version -> VersionRange #
The version range <= v
withinRange v' (orEarlierVersion v) = v' <= v
unionVersionRanges :: VersionRange -> VersionRange -> VersionRange #
The version range vr1 || vr2
withinRange v' (unionVersionRanges vr1 vr2) = withinRange v' vr1 || withinRange v' vr2
intersectVersionRanges :: VersionRange -> VersionRange -> VersionRange #
The version range vr1 && vr2
withinRange v' (intersectVersionRanges vr1 vr2) = withinRange v' vr1 && withinRange v' vr2
differenceVersionRanges :: VersionRange -> VersionRange -> VersionRange #
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 #
The inverse of a version range
withinRange v' (invertVersionRange vr) = not (withinRange v' vr)
withinVersion :: Version -> VersionRange #
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]) tmajorBoundVersion :: Version -> VersionRange #
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: 2.0.0.2
betweenVersionsInclusive :: Version -> Version -> VersionRange #
Deprecated: In practice this is not very useful because we normally use inclusive lower bounds and exclusive upper bounds
Inspection
withinRange :: Version -> VersionRange -> Bool #
Does this version fall within the given range?
This is the evaluation function for the VersionRange type.
isAnyVersion :: VersionRange -> Bool #
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 #
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 #
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 #
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'
Arguments
| :: a |
|
| -> (Version -> a) | "== v" |
| -> (Version -> a) | "> v" |
| -> (Version -> a) | "< v" |
| -> (a -> a -> a) |
|
| -> (a -> a -> a) |
|
| -> 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.
Arguments
| :: a |
|
| -> (Version -> a) | "== v" |
| -> (Version -> a) | "> v" |
| -> (Version -> a) | "< v" |
| -> (Version -> a) | ">= v" |
| -> (Version -> a) | "<= v" |
| -> (Version -> Version -> a) |
|
| -> (Version -> Version -> a) |
|
| -> (a -> a -> a) |
|
| -> (a -> a -> a) |
|
| -> (a -> a) |
|
| -> 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 #
Does the version range have an upper bound?
Since: 1.24.0.0
hasLowerBound :: VersionRange -> Bool #
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 #
Given a version range, remove the highest upper bound. Example: (>= 1 && <
3) || (>= 4 && < 5) is converted to (>= 1 && || (= 4).
Version intervals view
asVersionIntervals :: VersionRange -> [VersionInterval] #
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 = FalseisSpecificVersion vr
| [(LowerBound v InclusiveBound
,UpperBound v' InclusiveBound)] <- asVersionIntervals vr
, v == v' = Just v
| otherwise = Nothingtype VersionInterval = (LowerBound, UpperBound) #
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 #
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.
Instances
toVersionIntervals :: VersionRange -> VersionIntervals #
Convert a VersionRange to a sequence of version intervals.
fromVersionIntervals :: VersionIntervals -> VersionRange #
Convert a VersionIntervals value back into a VersionRange expression
representing the version intervals.
withinIntervals :: Version -> VersionIntervals -> Bool #
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] #
Inspect the list of version intervals.
mkVersionIntervals :: [VersionInterval] -> Maybe VersionIntervals #
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.