Provided by: node-semver_5.5.1-1_all bug


       semver - The semantic versioner for npm


         npm install --save semver


       As a node module:

         const semver = require('semver')

         semver.valid('1.2.3') // '1.2.3'
         semver.valid('a.b.c') // null
         semver.clean('  =v1.2.3   ') // '1.2.3'
         semver.satisfies('1.2.3', '1.x || >=2.5.0 || 5.0.0 - 7.2.3') // true'1.2.3', '9.8.7') // false'1.2.3', '9.8.7') // true
         semver.valid(semver.coerce('v2')) // '2.0.0'
         semver.valid(semver.coerce('')) // '42.6.7'

       As a command-line utility:

         $ semver -h

         SemVer 5.3.0

         A JavaScript implementation of the specification
         Copyright Isaac Z. Schlueter

         Usage: semver [options] <version> [<version> [...]]
         Prints valid versions sorted by SemVer precedence

         -r --range <range>
                 Print versions that match the specified range.

         -i --increment [<level>]
                 Increment a version by the specified level.  Level can
                 be one of: major, minor, patch, premajor, preminor,
                 prepatch, or prerelease.  Default level is 'patch'.
                 Only one version may be specified.

         --preid <identifier>
                 Identifier to be used to prefix premajor, preminor,
                 prepatch or prerelease version increments.

         -l --loose
                 Interpret versions and ranges loosely

         -c --coerce
                 Coerce a string into SemVer if possible
                 (does not imply --loose)

         Program exits successfully if any valid version satisfies
         all supplied ranges, and prints all satisfying versions.

         If no satisfying versions are found, then exits failure.

         Versions are printed in ascending order, so supplying
         multiple versions to the utility will just sort them.


       A "version" is described by the v2.0.0 specification found at

       A leading "=" or "v" character is stripped off and ignored.


       A version range is a set of comparators which specify versions that satisfy the range.

       A comparator is composed of an operator and a version.  The set of primitive operators is:

       · < Less than

       · <= Less than or equal to

       · > Greater than

       · >= Greater than or equal to

       · =  Equal.   If  no  operator is specified, then equality is assumed, so this operator is
         optional, but MAY be included.

       For example, the comparator >=1.2.7 would match the  versions  1.2.7,  1.2.8,  2.5.3,  and
       1.3.9, but not the versions 1.2.6 or 1.1.0.

       Comparators  can  be  joined by whitespace to form a comparator set, which is satisfied by
       the intersection of all of the comparators it includes.

       A range is composed of one or more comparator sets, joined by ||.   A  version  matches  a
       range  if and only if every comparator in at least one of the ||-separated comparator sets
       is satisfied by the version.

       For example, the range >=1.2.7 <1.3.0 would match the versions 1.2.7, 1.2.8,  and  1.2.99,
       but not the versions 1.2.6, 1.3.0, or 1.1.0.

       The  range  1.2.7  || >=1.2.9 <2.0.0 would match the versions 1.2.7, 1.2.9, and 1.4.6, but
       not the versions 1.2.8 or 2.0.0.

   Prerelease Tags
       If a version has a prerelease tag (for  example,  1.2.3-alpha.3)  then  it  will  only  be
       allowed to satisfy comparator sets if at least one comparator with the same [major, minor,
       patch] tuple also has a prerelease tag.

       For example, the range >1.2.3-alpha.3 would be allowed to match the version 1.2.3-alpha.7,
       but  it  would not be satisfied by 3.4.5-alpha.9, even though 3.4.5-alpha.9 is technically
       "greater than" 1.2.3-alpha.3 according to the SemVer sort rules.  The version  range  only
       accepts  prerelease tags on the 1.2.3 version.  The version 3.4.5 would satisfy the range,
       because it does not have a prerelease flag, and 3.4.5 is greater than 1.2.3-alpha.7.

       The purpose for this behavior is  twofold.   First,  prerelease  versions  frequently  are
       updated  very quickly, and contain many breaking changes that are (by the author's design)
       not yet fit for public consumption.  Therefore, by default, they are excluded  from  range
       matching semantics.

       Second,  a  user  who  has opted into using a prerelease version has clearly indicated the
       intent to use that specific set of alpha/beta/rc versions.  By including a prerelease  tag
       in  the  range,  the  user  is indicating that they are aware of the risk.  However, it is
       still not appropriate to assume that they have opted into taking a  similar  risk  on  the
       next set of prerelease versions.

   Prerelease Identifiers
       The  method .inc takes an additional identifier string argument that will append the value
       of the string as a prerelease identifier:
'1.2.3', 'prerelease', 'beta')
         // '1.2.4-beta.0'

       command-line example:

         $ semver 1.2.3 -i prerelease --preid beta

       Which then can be used to increment further:

         $ semver 1.2.4-beta.0 -i prerelease

   Advanced Range Syntax
       Advanced range syntax desugars to primitive comparators in deterministic ways.

       Advanced ranges may be combined in the same way as primitive comparators using white space
       or ||.

   Hyphen Ranges X.Y.Z - A.B.C
       Specifies an inclusive set.

       · 1.2.3 - 2.3.4 := >=1.2.3 <=2.3.4

       If  a  partial  version  is provided as the first version in the inclusive range, then the
       missing pieces are replaced with zeroes.

       · 1.2 - 2.3.4 := >=1.2.0 <=2.3.4

       If a partial version is provided as the second version in the inclusive  range,  then  all
       versions  that  start  with the supplied parts of the tuple are accepted, but nothing that
       would be greater than the provided tuple parts.

       · 1.2.3 - 2.3 := >=1.2.3 <2.4.0

       · 1.2.3 - 2 := >=1.2.3 <3.0.0

   X-Ranges 1.2.x 1.X 1.2.* *
       Any of X, x, or * may be used to "stand in" for one of the numeric values in  the  [major,
       minor, patch] tuple.

       · * := >=0.0.0 (Any version satisfies)

       · 1.x := >=1.0.0 <2.0.0 (Matching major version)

       · 1.2.x := >=1.2.0 <1.3.0 (Matching major and minor versions)

       A  partial  version  range  is  treated as an X-Range, so the special character is in fact

       · "" (empty string) := * := >=0.0.0

       · 1 := 1.x.x := >=1.0.0 <2.0.0

       · 1.2 := 1.2.x := >=1.2.0 <1.3.0

   Tilde Ranges ~1.2.3 ~1.2 ~1
       Allows patch-level changes if a minor version is  specified  on  the  comparator.   Allows
       minor-level changes if not.

       · ~1.2.3 := >=1.2.3 <1.(2+1).0 := >=1.2.3 <1.3.0

       · ~1.2 := >=1.2.0 <1.(2+1).0 := >=1.2.0 <1.3.0 (Same as 1.2.x)

       · ~1 := >=1.0.0 <(1+1).0.0 := >=1.0.0 <2.0.0 (Same as 1.x)

       · ~0.2.3 := >=0.2.3 <0.(2+1).0 := >=0.2.3 <0.3.0

       · ~0.2 := >=0.2.0 <0.(2+1).0 := >=0.2.0 <0.3.0 (Same as 0.2.x)

       · ~0 := >=0.0.0 <(0+1).0.0 := >=0.0.0 <1.0.0 (Same as 0.x)

       · ~1.2.3-beta.2  :=  >=1.2.3-beta.2 <1.3.0 Note that prereleases in the 1.2.3 version will
         be allowed, if they are greater than or equal to  beta.2.   So,  1.2.3-beta.4  would  be
         allowed,  but  1.2.4-beta.2 would not, because it is a prerelease of a different [major,
         minor, patch] tuple.

   Caret Ranges ^1.2.3 ^0.2.5 ^0.0.4
       Allows changes that do not modify the left-most  non-zero  digit  in  the  [major,  minor,
       patch]  tuple.  In other words, this allows patch and minor updates for versions 1.0.0 and
       above, patch updates for versions 0.X >=0.1.0, and no updates for versions 0.0.X.

       Many authors treat a 0.x version as if the x were the major "breaking-change" indicator.

       Caret ranges are ideal when an author may make breaking changes between  0.2.4  and  0.3.0
       releases,  which  is  a  common  practice.   However,  it  presumes that there will not be
       breaking changes between 0.2.4 and 0.2.5.  It allows for changes that are presumed  to  be
       additive (but non-breaking), according to commonly observed practices.

       · ^1.2.3 := >=1.2.3 <2.0.0

       · ^0.2.3 := >=0.2.3 <0.3.0

       · ^0.0.3 := >=0.0.3 <0.0.4

       · ^1.2.3-beta.2  :=  >=1.2.3-beta.2 <2.0.0 Note that prereleases in the 1.2.3 version will
         be allowed, if they are greater than or equal to  beta.2.   So,  1.2.3-beta.4  would  be
         allowed,  but  1.2.4-beta.2 would not, because it is a prerelease of a different [major,
         minor, patch] tuple.

       · ^0.0.3-beta := >=0.0.3-beta <0.0.4  Note that prereleases in the 0.0.3 version only will
         be allowed, if they are greater than or equal to beta.  So, 0.0.3-pr.2 would be allowed.

       When  parsing caret ranges, a missing patch value desugars to the number 0, but will allow
       flexibility within that value, even if the major and minor versions are both 0.

       · ^1.2.x := >=1.2.0 <2.0.0

       · ^0.0.x := >=0.0.0 <0.1.0

       · ^0.0 := >=0.0.0 <0.1.0

       A missing minor and patch values will desugar to zero, but also allow  flexibility  within
       those values, even if the major version is zero.

       · ^1.x := >=1.0.0 <2.0.0

       · ^0.x := >=0.0.0 <1.0.0

   Range Grammar
       Putting  all  this  together, here is a Backus-Naur grammar for ranges, for the benefit of
       parser authors:

         range-set  ::= range ( logical-or range ) *
         logical-or ::= ( ' ' ) * '||' ( ' ' ) *
         range      ::= hyphen | simple ( ' ' simple ) * | ''
         hyphen     ::= partial ' - ' partial
         simple     ::= primitive | partial | tilde | caret
         primitive  ::= ( '<' | '>' | '>=' | '<=' | '=' ) partial
         partial    ::= xr ( '.' xr ( '.' xr qualifier ? )? )?
         xr         ::= 'x' | 'X' | '*' | nr
         nr         ::= '0' | ['1'-'9'] ( ['0'-'9'] ) *
         tilde      ::= '~' partial
         caret      ::= '^' partial
         qualifier  ::= ( '-' pre )? ( '+' build )?
         pre        ::= parts
         build      ::= parts
         parts      ::= part ( '.' part ) *
         part       ::= nr | [-0-9A-Za-z]+


       All methods and classes take a final loose boolean argument that, if true,  will  be  more
       forgiving  about not-quite-valid semver strings.  The resulting output will always be 100%
       strict, of course.

       Strict-mode Comparators and Ranges will be strict  about  the  SemVer  strings  that  they

       · valid(v): Return the parsed version, or null if it's not valid.

       · inc(v,  release): Return the version incremented by the release type (major,   premajor,
         minor, preminor, patch, prepatch, or prerelease), or null if it's not valid

       · premajor in one call will bump the version up to the next major version and  down  to  a
         prerelease of that major version.  preminor, and prepatch work the same way.

       · If  called from a non-prerelease version, the prerelease will work the same as prepatch.
         It increments the patch version, then makes  a  prerelease.  If  the  input  version  is
         already a prerelease it simply increments it.

       · prerelease(v):  Returns  an  array  of  prerelease  components,  or  null if none exist.
         Example: prerelease('1.2.3-alpha.1') -> ['alpha', 1]

       · major(v): Return the major version number.

       · minor(v): Return the minor version number.

       · patch(v): Return the patch version number.

       · intersects(r1, r2, loose): Return  true  if  the  two  supplied  ranges  or  comparators

       · gt(v1, v2): v1 > v2

       · gte(v1, v2): v1 >= v2

       · lt(v1, v2): v1 < v2

       · lte(v1, v2): v1 <= v2

       · eq(v1,  v2):  v1 == v2 This is true if they're logically equivalent, even if they're not
         the exact same string.  You already know how to compare strings.

       · neq(v1, v2): v1 != v2 The opposite of eq.

       · cmp(v1, comparator, v2): Pass in a comparison string, and it'll call  the  corresponding
         function  above.   "==="  and  "!=="  do  simple string comparison, but are included for
         completeness.  Throws if an invalid comparison string is provided.

       · compare(v1, v2): Return 0 if v1 == v2, or 1 if v1 is greater, or -1 if  v2  is  greater.
         Sorts in ascending order if passed to Array.sort().

       · rcompare(v1,  v2):  The  reverse  of  compare.  Sorts an array of versions in descending
         order when passed to Array.sort().

       · diff(v1, v2): Returns difference between  two  versions  by  the  release  type  (major,
         premajor,  minor, preminor, patch, prepatch, or prerelease), or null if the versions are
         the same.

       · intersects(comparator): Return true if the comparators intersect

       · validRange(range): Return the valid range or null if it's not valid

       · satisfies(version, range): Return true if the version satisfies the range.

       · maxSatisfying(versions, range): Return the highest version in the  list  that  satisfies
         the range, or null if none of them do.

       · minSatisfying(versions, range): Return the lowest version in the list that satisfies the
         range, or null if none of them do.

       · gtr(version, range): Return true if version is greater than all the versions possible in
         the range.

       · ltr(version,  range):  Return  true if version is less than all the versions possible in
         the range.

       · outside(version, range, hilo): Return true if the version is outside the bounds  of  the
         range  in either the high or low direction.  The hilo argument must be either the string
         '>' or '<'.  (This is the function called by gtr and ltr.)

       · intersects(range): Return true if any of the ranges comparators intersect

       Note that, since ranges may be non-contiguous, a version  might  not  be  greater  than  a
       range, less than a range, or satisfy a range!  For example, the range 1.2 <1.2.9 || >2.0.0
       would have a hole from 1.2.9 until 2.0.0, so the version 1.2.10 would not be greater  than
       the range (because 2.0.1 satisfies, which is higher), nor less than the range (since 1.2.8
       satisfies, which is lower), and it also does not satisfy the range.

       If you want to know if  a  version  satisfies  or  does  not  satisfy  a  range,  use  the
       satisfies(version, range) function.

       · coerce(version): Coerces a string to semver if possible

       This  aims  to  provide  a very forgiving translation of a non-semver string to semver. It
       looks for the first digit in a string, and consumes all remaining characters which satisfy
       at  least  a  partial  semver  (e.g.,  1,  1.2, 1.2.3) up to the max permitted length (256
       characters).  Longer versions are simply truncated ( becomes 4.6.3).   All
       surrounding  text is simply ignored (v3.4 replaces v3.3.1 becomes 3.4.0).  Only text which
       lacks digits will fail coercion (version one is not valid).  The maximum  length  for  any
       semver  component  considered  for  coercion  is  16 characters; longer components will be
       ignored (10000000000000000.4.7.4  becomes  4.7.4).   The  maximum  value  for  any  semver
       component  is Integer.MAX_SAFE_INTEGER || (2**53 - 1); higher value components are invalid
       (9999999999999999.4.7.4 is likely invalid).

                                          November 2018                                 SEMVER(1)