mirror of
https://github.com/anchore/syft.git
synced 2026-11-02 15:36:41 +01:00
Alex Goodman
b2f4d7eda2
* follow convention for naming catalogers Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com> * fix cataloger name example Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com> --------- Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package debian
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import (
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"bufio"
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"io"
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"regexp"
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"sort"
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"strings"
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"github.com/scylladb/go-set/strset"
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"github.com/anchore/syft/internal"
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)
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// For more information see: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/#license-syntax
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var (
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licensePattern = regexp.MustCompile(`^License: (?P<license>\S*)`)
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commonLicensePathPattern = regexp.MustCompile(`/usr/share/common-licenses/(?P<license>[0-9A-Za-z_.\-]+)`)
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)
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func parseLicensesFromCopyright(reader io.Reader) []string {
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findings := strset.New()
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scanner := bufio.NewScanner(reader)
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for scanner.Scan() {
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line := scanner.Text()
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if value := findLicenseClause(licensePattern, "license", line); value != "" {
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findings.Add(value)
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}
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if value := findLicenseClause(commonLicensePathPattern, "license", line); value != "" {
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findings.Add(value)
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}
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}
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results := findings.List()
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sort.Strings(results)
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return results
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}
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func findLicenseClause(pattern *regexp.Regexp, valueGroup, line string) string {
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matchesByGroup := internal.MatchNamedCaptureGroups(pattern, line)
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candidate, ok := matchesByGroup[valueGroup]
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if !ok {
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return ""
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}
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return ensureIsSingleLicense(candidate)
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}
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func ensureIsSingleLicense(candidate string) (license string) {
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candidate = strings.TrimSpace(candidate)
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if strings.Contains(candidate, " or ") || strings.Contains(candidate, " and ") {
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// this is a multi-license summary, ignore this as other recurrent license lines should cover this
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return
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}
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if candidate != "" && strings.ToLower(candidate) != "none" {
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// the license may be at the end of a sentence, clean . characters
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license = strings.TrimSuffix(candidate, ".")
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}
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return license
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}
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