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/**

* Provides logic for working SemVer (Semantic Versioning).

*/

overlay[local?]

module;

bindingset[str]

private string leftPad(string str) { result = ("0000" + str).suffix(str.length()) }

/**

* Gets the major number of a SemVer string.

*/

bindingset[s]

string getMajor(string s) { result = s.regexpCapture("v?(\\d+).*", 1) }

/**

* Gets the minor number of a SemVer string.

*/

bindingset[s]

string getMinor(string s) { result = s.regexpCapture("v?(\\d+)\\.(\\d+).*", 2) }

/**

* Gets the patch number of a SemVer string.

*/

bindingset[s]

string getPatch(string s) { result = s.regexpCapture("v?(\\d+)\\.(\\d+)\\.(\\d+).*", 3) }

/**

* Normalizes a SemVer string such that the lexicographical ordering

* of two normalized strings is consistent with the SemVer ordering.

*

* Pre-release information and build metadata is not yet supported.

*/

bindingset[orig]

string padSemVer(string orig, string major, string minor, string patch) {

major = getMajor(orig) and

(

minor = getMinor(orig)

or

not exists(getMinor(orig)) and minor = "0"

) and

(

patch = getPatch(orig)

or

not exists(getPatch(orig)) and patch = "0"

) and

result = leftPad(major) + "." + leftPad(minor) + "." + leftPad(patch)

}

/**

* Normalizes a SemVer string such that the lexicographical ordering

* of two normalized strings is consistent with the SemVer ordering.

*

* Pre-release information and build metadata is not yet supported.

*/

bindingset[orig]

string padSemVer(string orig) { result = padSemVer(orig, _, _, _) }