mirror of
https://github.com/anchore/syft.git
synced 2026-11-02 07:26:34 +01:00
William Murphy
878df69330
* chore: stop re-exporting wfn.Attributes Previously, Syft re-exported wfn.Attributes from the nvdtools package as a member of the Package struct. However, Syft doesn't own this struct, and so after Syft 1.0, might be forced to bump a semver major version due to a breaking change in wfn.Attributes. Rather than incur this risk going into 1.0, instead replace Syft's use of wfn.Attributes with Syft's own cpe.CPE type. That type has some pass-through calls to wfn.Attributes, but hides the dependency from the rest of the application. Signed-off-by: Will Murphy <will.murphy@anchore.com> * chore: make cpe.CPE type a Stringer Previously, the cpe.CPE type was an alias for wfn.Attributes from nvdtools. Now that it is a type we control, make the String method take the CPE as a receiver, rather than as a normal parameter, so that Syft's cpe.CPE type implements Stringer. Signed-off-by: Will Murphy <will.murphy@anchore.com> --------- Signed-off-by: Will Murphy <will.murphy@anchore.com>
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package cpe
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import (
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"sort"
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)
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var _ sort.Interface = (*BySpecificity)(nil)
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type BySpecificity []CPE
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func (c BySpecificity) Len() int { return len(c) }
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func (c BySpecificity) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
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func (c BySpecificity) Less(i, j int) bool {
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iScore := weightedCountForSpecifiedFields(c[i])
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jScore := weightedCountForSpecifiedFields(c[j])
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// check weighted sort first
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if iScore != jScore {
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return iScore > jScore
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}
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// sort longer fields to top
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if countFieldLength(c[i]) != countFieldLength(c[j]) {
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return countFieldLength(c[i]) > countFieldLength(c[j])
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}
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// if score and length are equal then text sort
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// note that we are not using String from the syft pkg
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// as we are not encoding/decoding this CPE string so we don't
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// need the proper quoted version of the CPE.
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return c[i].BindToFmtString() < c[j].BindToFmtString()
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}
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func countFieldLength(cpe CPE) int {
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return len(cpe.Part + cpe.Vendor + cpe.Product + cpe.Version + cpe.TargetSW)
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}
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func weightedCountForSpecifiedFields(cpe CPE) int {
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checksForSpecifiedField := []func(cpe CPE) (bool, int){
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func(cpe CPE) (bool, int) { return cpe.Part != "", 2 },
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func(cpe CPE) (bool, int) { return cpe.Vendor != "", 3 },
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func(cpe CPE) (bool, int) { return cpe.Product != "", 4 },
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func(cpe CPE) (bool, int) { return cpe.Version != "", 1 },
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func(cpe CPE) (bool, int) { return cpe.TargetSW != "", 1 },
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}
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weightedCount := 0
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for _, fieldIsSpecified := range checksForSpecifiedField {
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isSpecified, weight := fieldIsSpecified(cpe)
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if isSpecified {
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weightedCount += weight
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}
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}
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return weightedCount
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}
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