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62 lines
2.0 KiB
Go
62 lines
2.0 KiB
Go
package spdxlicense
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import (
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"strings"
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)
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// https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/#license-short-name
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// License generated in license_list.go uses a regular expression to help resolve cases where
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// x.0.0 and x are supplied as version numbers. For SPDX compatibility, versions with trailing
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// dot-zeroes are considered to be equivalent to versions without (e.g., “2.0.0” is considered equal to “2.0” and “2”).
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// EX: gpl-2+ ---> GPL-2.0+
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// EX: gpl-2.0.0-only ---> GPL-2.0-only
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// See the debian link for more details on the spdx license differences
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const (
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LicenseRefPrefix = "LicenseRef-" // prefix for non-standard licenses
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)
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//go:generate go run ./generate
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// ID returns the canonical license ID for the given license ID
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// Note: this function is only concerned with returning a best match of an SPDX license ID
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// SPDX Expressions will be handled by a parent package which will call this function
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func ID(id string) (value string, exists bool) {
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// first look for a canonical license
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if value, exists := licenseIDs[cleanLicenseID(id)]; exists {
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return value, exists
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}
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// we did not find, so treat it as a separate license
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return "", false
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}
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func cleanLicenseID(id string) string {
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id = strings.TrimSpace(id)
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id = strings.ToLower(id)
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return strings.ReplaceAll(id, "-", "")
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}
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// LicenseInfo contains license ID and name
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type LicenseInfo struct {
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ID string
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}
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// LicenseByURL returns the license ID for a given URL.
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// It first checks supplemental mappings (user-contributed URLs not in the official
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// SPDX list), then the auto-generated SPDX license list mappings.
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func LicenseByURL(url string) (LicenseInfo, bool) {
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url = strings.TrimSpace(url)
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// Check supplemental mappings first (user-contributed URLs)
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if id, exists := supplementalURLToLicense[url]; exists {
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return LicenseInfo{ID: id}, true
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}
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// Fall back to auto-generated SPDX mappings
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if id, exists := urlToLicense[url]; exists {
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return LicenseInfo{ID: id}, true
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}
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return LicenseInfo{}, false
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}
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