Does not parse some versions properly

[nikolay]

Example: 5.5.9-1ubuntu4.1.

[nikolay]

I think one issues is that SemVer incorrectly suggests that periods can't be allowed in the pre-release component although their examples have them.

[Ariel-Rodriguez]

Testing using OSX

FAIL

./semver.sh 1.0.2-rc.1 1.0.2
1.0.2-rc.1 -> M: 1.1 m:0.1 p:2.1 s:-rc.1
1.0.2 -> M: 1 m:0 p:2 s:
./semver.sh: line 29: [: 1.1: integer expression expected
./semver.sh: line 33: [: 0.1: integer expression expected
./semver.sh: line 37: [: 2.1: integer expression expected
1.0.2-rc.1 == 1.0.2 -> 1.
./semver.sh: line 64: [: 1.1: integer expression expected
./semver.sh: line 68: [[: 1.1: syntax error: invalid arithmetic operator (error token is ".1")
./semver.sh: line 72: [[: 1.1: syntax error: invalid arithmetic operator (error token is ".1")
1.0.2-rc.1 < 1.0.2 -> 0.
./semver.sh: line 29: [: 1.1: integer expression expected
./semver.sh: line 33: [: 0.1: integer expression expected
./semver.sh: line 37: [: 2.1: integer expression expected
./semver.sh: line 64: [: 1.1: integer expression expected
./semver.sh: line 68: [[: 1.1: syntax error: invalid arithmetic operator (error token is ".1")
./semver.sh: line 72: [[: 1.1: syntax error: invalid arithmetic operator (error token is ".1")
1.0.2-rc.1 > 1.0.2 -> 1.

1.0.2-rc.1 == 1.0.2 -> 1
Fail because is expected to return 0. Because 1.0.2-rc.1 is older than 1.0.2

I created a simplified semver compare in bash here: https://gist.github.com/Ariel-Rodriguez/9e3c2163f4644d7a389759b224bfe7f3

---

http://semver.org/

A pre-release version MAY be denoted by appending a hyphen and a series of dot separated identifiers immediately following the patch version. Identifiers MUST comprise only ASCII alphanumerics and hyphen [0-9A-Za-z-]. Identifiers MUST NOT be empty. Numeric identifiers MUST NOT include leading zeroes. Pre-release versions have a lower precedence than the associated normal version. A pre-release version indicates that the version is unstable and might not satisfy the intended compatibility requirements as denoted by its associated normal version. Examples: 1.0.0-alpha, 1.0.0-alpha.1, 1.0.0-0.3.7, 1.0.0-x.7.z.92.