package licenses

import "golang.org/x/pkgsite/internal/licenses"

Package licenses detects licenses and determines whether they are redistributable. The functions in this package do not return errors; instead, they log any problems they encounter and fail closed by reporting that the module or package is not redistributable.

Example (modproxy):

d := licenses.NewDetector(modulePath, version, zipReader, log.Infof)
modRedist := d.ModuleIsRedistributable()

Example (discovery):

d := licenses.NewDetector(modulePath, version, zipReader, log.Infof)
modRedist := d.ModuleIsRedistributable()
lics := d.AllLicenses()
pkgRedist, pkgMetas := d.PackageInfo(pkgSubdir)

Index ¶

• Variables
• func DetectFile(contents []byte, filename string, logf func(string, ...interface{})) ([]string, licensecheck.Coverage)
• func Redistributable(licenseTypes []string) bool
• type AcceptedLicenseInfo
• func AcceptedLicenses() []AcceptedLicenseInfo
• type Detector
• func NewDetector(modulePath, version string, zr *zip.Reader, logf func(string, ...interface{})) *Detector
• func (d *Detector) AllLicenses() []*License
• func (d *Detector) Files(which WhichFiles) []*zip.File
• func (d *Detector) ModuleIsRedistributable() bool
• func (d *Detector) ModuleLicenses() []*License
• func (d *Detector) PackageInfo(dir string) (isRedistributable bool, lics []*License)
• type License
• func (l *License) RemoveNonRedistributableData()
• type Metadata
• type WhichFiles

Package Files ¶

exceptions.gen.go exceptions.go licenses.go

Variables ¶

var (
    FileNames = []string{
        "COPYING",
        "COPYING.md",
        "COPYING.markdown",
        "COPYING.txt",
        "LICENCE",
        "LICENCE.md",
        "LICENCE.markdown",
        "LICENCE.txt",
        "LICENSE",
        "LICENSE.md",
        "LICENSE.markdown",
        "LICENSE.txt",
        "LICENSE-2.0.txt",
        "LICENCE-2.0.txt",
        "LICENSE-APACHE",
        "LICENCE-APACHE",
        "LICENSE-APACHE-2.0.txt",
        "LICENCE-APACHE-2.0.txt",
        "LICENSE-MIT",
        "LICENCE-MIT",
        "LICENSE.MIT",
        "LICENCE.MIT",
        "LICENSE.code",
        "LICENCE.code",
        "LICENSE.docs",
        "LICENCE.docs",
        "LICENSE.rst",
        "LICENCE.rst",
        "MIT-LICENSE",
        "MIT-LICENCE",
        "MIT-LICENSE.md",
        "MIT-LICENCE.md",
        "MIT-LICENSE.markdown",
        "MIT-LICENCE.markdown",
        "MIT-LICENSE.txt",
        "MIT-LICENCE.txt",
        "MIT_LICENSE",
        "MIT_LICENCE",
        "UNLICENSE",
        "UNLICENCE",
    }
)

func DetectFile ¶ Uses

func DetectFile(contents []byte, filename string, logf func(string, ...interface{})) ([]string, licensecheck.Coverage)

DetectFile return the set of license types for the given file contents. It also returns the licensecheck coverage information. The filename is used solely for logging.

func Redistributable ¶ Uses

func Redistributable(licenseTypes []string) bool

Redistributable reports whether the set of license types establishes that a module or package is redistributable. All the licenses we see that are relevant must be redistributable, and we must see at least one such license.

type AcceptedLicenseInfo ¶ Uses

type AcceptedLicenseInfo struct {
    Name string
    URL  string
}

AcceptedLicenseInfo describes a license that is accepted by the discovery site.

func AcceptedLicenses ¶ Uses

func AcceptedLicenses() []AcceptedLicenseInfo

AcceptedLicenses returns a sorted slice of license types that are accepted as redistributable. Its result is intended to be displayed to users.

type Detector ¶ Uses

type Detector struct {
    // contains filtered or unexported fields
}

A Detector detects licenses in a module and its packages.

func NewDetector ¶ Uses

func NewDetector(modulePath, version string, zr *zip.Reader, logf func(string, ...interface{})) *Detector

NewDetector returns a Detector for the given module and version. zr should be the zip file for that module and version. logf is for logging; if nil, no logging is done.

func (*Detector) AllLicenses ¶ Uses

func (d *Detector) AllLicenses() []*License

AllLicenses returns all the licenses detected in the entire module, including package licenses.

func (*Detector) Files ¶ Uses

func (d *Detector) Files(which WhichFiles) []*zip.File

Files returns a list of license files from the zip. The which argument determines the location of the files considered.

func (*Detector) ModuleIsRedistributable ¶ Uses

func (d *Detector) ModuleIsRedistributable() bool

ModuleIsRedistributable reports whether the given module is redistributable.

func (*Detector) ModuleLicenses ¶ Uses

func (d *Detector) ModuleLicenses() []*License

ModuleLicenses returns the licenses that apply to the module.

func (*Detector) PackageInfo ¶ Uses

func (d *Detector) PackageInfo(dir string) (isRedistributable bool, lics []*License)

PackageInfo reports whether the package at dir, a directory relative to the module root, is redistributable. It also returns all the licenses that apply to the package.

type License ¶ Uses

type License struct {
    *Metadata
    Contents []byte
}

A License is a classified license file path and its contents.

func (*License) RemoveNonRedistributableData ¶ Uses

func (l *License) RemoveNonRedistributableData()

RemoveNonRedistributableData methods removes the license contents if the license is non-redistributable.

type Metadata ¶ Uses

type Metadata struct {
    // Types is the set of license types, as determined by the licensecheck package.
    Types []string
    // FilePath is the '/'-separated path to the license file in the module zip,
    // relative to the contents directory.
    FilePath string
    // The output of oldlicensecheck.Cover.
    OldCoverage oldlicensecheck.Coverage
    Coverage    licensecheck.Coverage
}

Metadata holds information extracted from a license file.

type WhichFiles ¶ Uses

type WhichFiles int

WhichFiles describes which files from the zip should be returned by Detector.Files.

const (
    // Only files from the root (contents) directory.
    RootFiles WhichFiles = iota
    // Only files that are not in the root directory.
    NonRootFiles
    // All files; the union of root and non-root.
    AllFiles
)