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feat(golang): add license parsing from vendor dirs (#3522)

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Signed-off-by: Dominik Schmidt <dev@dominik-schmidt.de>
Signed-off-by: Keith Zantow <kzantow@gmail.com>
Co-authored-by: Keith Zantow <kzantow@gmail.com>
This commit is contained in:
Dominik Schmidt 2025-01-18 02:25:05 +01:00 committed by GitHub
parent 8198a706d6
commit 19a75fe504
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9 changed files with 562 additions and 11 deletions
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2
cmd/syft/internal/options/catalog.go
View File

@ -156,6 +156,8 @@ func (cfg Catalog) ToPackagesConfig() pkgcataloging.Config {
Golang: golang.DefaultCatalogerConfig().
WithSearchLocalModCacheLicenses(*multiLevelOption(false, enrichmentEnabled(cfg.Enrich, task.Go, task.Golang), cfg.Golang.SearchLocalModCacheLicenses)).
WithLocalModCacheDir(cfg.Golang.LocalModCacheDir).
WithSearchLocalVendorLicenses(*multiLevelOption(false, enrichmentEnabled(cfg.Enrich, task.Go, task.Golang), cfg.Golang.SearchLocalVendorLicenses)).
WithLocalVendorDir(cfg.Golang.LocalVendorDir).
WithSearchRemoteLicenses(*multiLevelOption(false, enrichmentEnabled(cfg.Enrich, task.Go, task.Golang), cfg.Golang.SearchRemoteLicenses)).
WithProxy(cfg.Golang.Proxy).
WithNoProxy(cfg.Golang.NoProxy).

7
cmd/syft/internal/options/golang.go
View File

@ -10,6 +10,8 @@ import (
type golangConfig struct {
SearchLocalModCacheLicenses *bool `json:"search-local-mod-cache-licenses" yaml:"search-local-mod-cache-licenses" mapstructure:"search-local-mod-cache-licenses"`
LocalModCacheDir string `json:"local-mod-cache-dir" yaml:"local-mod-cache-dir" mapstructure:"local-mod-cache-dir"`
SearchLocalVendorLicenses *bool `json:"search-local-vendor-licenses" yaml:"search-local-vendor-licenses" mapstructure:"search-local-vendor-licenses"`
LocalVendorDir string `json:"local-vendor-dir" yaml:"local-vendor-dir" mapstructure:"local-vendor-dir"`
SearchRemoteLicenses *bool `json:"search-remote-licenses" yaml:"search-remote-licenses" mapstructure:"search-remote-licenses"`
Proxy string `json:"proxy" yaml:"proxy" mapstructure:"proxy"`
NoProxy string `json:"no-proxy" yaml:"no-proxy" mapstructure:"no-proxy"`
@ -24,6 +26,9 @@ func (o *golangConfig) DescribeFields(descriptions clio.FieldDescriptionSet) {
descriptions.Add(&o.SearchLocalModCacheLicenses, `search for go package licences in the GOPATH of the system running Syft, note that this is outside the
container filesystem and potentially outside the root of a local directory scan`)
descriptions.Add(&o.LocalModCacheDir, `specify an explicit go mod cache directory, if unset this defaults to $GOPATH/pkg/mod or $HOME/go/pkg/mod`)
descriptions.Add(&o.SearchLocalVendorLicenses, `search for go package licences in the vendor folder on the system running Syft, note that this is outside the
container filesystem and potentially outside the root of a local directory scan`)
descriptions.Add(&o.LocalVendorDir, `specify an explicit go vendor directory, if unset this defaults to ./vendor`)
descriptions.Add(&o.SearchRemoteLicenses, `search for go package licences by retrieving the package from a network proxy`)
descriptions.Add(&o.Proxy, `remote proxy to use when retrieving go packages from the network,
if unset this defaults to $GOPROXY followed by https://proxy.golang.org`)
@ -49,6 +54,8 @@ func defaultGolangConfig() golangConfig {
return golangConfig{
SearchLocalModCacheLicenses: nil, // this defaults to false, which is the API default
LocalModCacheDir: def.LocalModCacheDir,
SearchLocalVendorLicenses: nil, // this defaults to false, which is the API default
LocalVendorDir: def.LocalVendorDir,
SearchRemoteLicenses: nil, // this defaults to false, which is the API default
Proxy: strings.Join(def.Proxies, ","),
NoProxy: strings.Join(def.NoProxy, ","),

15
syft/pkg/cataloger/golang/config.go
View File

@ -22,6 +22,8 @@ var (
type CatalogerConfig struct {
SearchLocalModCacheLicenses bool `yaml:"search-local-mod-cache-licenses" json:"search-local-mod-cache-licenses" mapstructure:"search-local-mod-cache-licenses"`
LocalModCacheDir string `yaml:"local-mod-cache-dir" json:"local-mod-cache-dir" mapstructure:"local-mod-cache-dir"`
SearchLocalVendorLicenses bool `yaml:"search-local-vendor-licenses" json:"search-local-vendor-licenses" mapstructure:"search-local-vendor-licenses"`
LocalVendorDir string `yaml:"local-vendor-dir" json:"local-vendor-dir" mapstructure:"local-vendor-dir"`
SearchRemoteLicenses bool `yaml:"search-remote-licenses" json:"search-remote-licenses" mapstructure:"search-remote-licenses"`
Proxies []string `yaml:"proxies,omitempty" json:"proxies,omitempty" mapstructure:"proxies"`
NoProxy []string `yaml:"no-proxy,omitempty" json:"no-proxy,omitempty" mapstructure:"no-proxy"`
@ -108,6 +110,19 @@ func (g CatalogerConfig) WithLocalModCacheDir(input string) CatalogerConfig {
return g
}
func (g CatalogerConfig) WithSearchLocalVendorLicenses(input bool) CatalogerConfig {
g.SearchLocalVendorLicenses = input
return g
}
func (g CatalogerConfig) WithLocalVendorDir(input string) CatalogerConfig {
if input == "" {
return g
}
g.LocalVendorDir = input
return g
}
func (g CatalogerConfig) WithSearchRemoteLicenses(input bool) CatalogerConfig {
g.SearchRemoteLicenses = input
return g

33
syft/pkg/cataloger/golang/config_test.go
View File

@ -10,11 +10,12 @@ import (
func Test_Config(t *testing.T) {
type opts struct {
local bool
cacheDir string
remote bool
proxy string
noProxy string
local bool
cacheDir string
vendorDir string
remote bool
proxy string
noProxy string
}
homedirCacheDisabled := homedir.DisableCache
@ -45,10 +46,15 @@ func Test_Config(t *testing.T) {
"GOPRIVATE": "my.private",
"GONOPROXY": "no.proxy",
},
opts: opts{},
opts: opts{
// defaults to $cwd/vendor, we need to set it to make the output predictable
vendorDir: "/vendor",
},
expected: CatalogerConfig{
SearchLocalModCacheLicenses: false,
LocalModCacheDir: filepath.Join("/go", "pkg", "mod"),
SearchLocalVendorLicenses: false,
LocalVendorDir: "/vendor",
SearchRemoteLicenses: false,
Proxies: []string{"https://my.proxy"},
NoProxy: []string{"my.private", "no.proxy"},
@ -64,15 +70,18 @@ func Test_Config(t *testing.T) {
"GONOPROXY": "no.proxy",
},
opts: opts{
local: true,
cacheDir: "/go-cache",
remote: true,
proxy: "https://alt.proxy,direct",
noProxy: "alt.no.proxy",
local: true,
cacheDir: "/go-cache",
vendorDir: "/vendor",
remote: true,
proxy: "https://alt.proxy,direct",
noProxy: "alt.no.proxy",
},
expected: CatalogerConfig{
SearchLocalModCacheLicenses: true,
LocalModCacheDir: "/go-cache",
SearchLocalVendorLicenses: true,
LocalVendorDir: "/vendor",
SearchRemoteLicenses: true,
Proxies: []string{"https://alt.proxy", "direct"},
NoProxy: []string{"alt.no.proxy"},
@ -92,6 +101,8 @@ func Test_Config(t *testing.T) {
got := DefaultCatalogerConfig().
WithSearchLocalModCacheLicenses(test.opts.local).
WithLocalModCacheDir(test.opts.cacheDir).
WithSearchLocalVendorLicenses(test.opts.local).
WithLocalVendorDir(test.opts.vendorDir).
WithSearchRemoteLicenses(test.opts.remote).
WithProxy(test.opts.proxy).
WithNoProxy(test.opts.noProxy)

46
syft/pkg/cataloger/golang/licenses.go
View File

@ -42,6 +42,7 @@ type goLicenseResolver struct {
catalogerName string
opts CatalogerConfig
localModCacheDir fs.FS
localVendorDir fs.FS
licenseCache cache.Resolver[[]goLicense]
lowerLicenseFileNames *strset.Set
}
@ -52,10 +53,25 @@ func newGoLicenseResolver(catalogerName string, opts CatalogerConfig) goLicenseR
localModCacheDir = os.DirFS(opts.LocalModCacheDir)
}
var localVendorDir fs.FS
if opts.SearchLocalVendorLicenses {
vendorDir := opts.LocalVendorDir
if vendorDir == "" {
wd, err := os.Getwd()
if err != nil {
log.Warn("unable to get CWD while resolving the local go vendor dir: %v", err)
} else {
vendorDir = filepath.Join(wd, "vendor")
}
}
localVendorDir = os.DirFS(vendorDir)
}
return goLicenseResolver{
catalogerName: catalogerName,
opts: opts,
localModCacheDir: localModCacheDir,
localVendorDir: localVendorDir,
licenseCache: cache.GetResolverCachingErrors[[]goLicense]("golang", "v1"),
lowerLicenseFileNames: strset.New(lowercaseLicenseFiles()...),
}
@ -103,6 +119,17 @@ func (c *goLicenseResolver) getLicenses(ctx context.Context, scanner licenses.Sc
}
}
// look in the local vendor directory...
if c.opts.SearchLocalVendorLicenses {
goLicenses, err = c.getLicensesFromLocalVendor(ctx, scanner, moduleName)
if err != nil {
log.WithFields("error", err, "module", moduleName, "version", moduleVersion).Trace("unable to read golang licenses vendor")
}
if len(goLicenses) > 0 {
return toPkgLicenses(goLicenses)
}
}
// download from remote sources
if c.opts.SearchRemoteLicenses {
goLicenses, err = c.getLicensesFromRemote(ctx, scanner, moduleName, moduleVersion)
@ -133,6 +160,25 @@ func (c *goLicenseResolver) getLicensesFromLocal(ctx context.Context, scanner li
return c.findLicensesInFS(ctx, scanner, "file://$GOPATH/pkg/mod/"+subdir+"/", dir)
}
func (c *goLicenseResolver) getLicensesFromLocalVendor(ctx context.Context, scanner licenses.Scanner, moduleName string) ([]goLicense, error) {
if c.localVendorDir == nil {
return nil, nil
}
subdir := processCaps(moduleName)
// get the local subdirectory containing the specific go module
dir, err := fs.Sub(c.localVendorDir, subdir)
if err != nil {
return nil, err
}
// if we're running against a directory on the filesystem, it may not include the
// user's homedir / GOPATH, so we defer to using the localModCacheResolver
// we use $GOPATH/pkg/mod to avoid leaking information about the user's system
return c.findLicensesInFS(ctx, scanner, "file://$GO_VENDOR/"+subdir+"/", dir)
}
func (c *goLicenseResolver) getLicensesFromRemote(ctx context.Context, scanner licenses.Scanner, moduleName, moduleVersion string) ([]goLicense, error) {
return c.licenseCache.Resolve(fmt.Sprintf("%s/%s", moduleName, moduleVersion), func() ([]goLicense, error) {
proxies := remotesForModule(c.opts.Proxies, c.opts.NoProxy, moduleName)

47
syft/pkg/cataloger/golang/licenses_test.go
View File

@ -68,6 +68,8 @@ func Test_LicenseSearch(t *testing.T) {
wd, err := os.Getwd()
require.NoError(t, err)
localVendorDir := filepath.Join(wd, "test-fixtures", "licenses-vendor")
licenseScanner := licenses.TestingOnlyScanner()
tests := []struct {
@ -168,6 +170,51 @@ func Test_LicenseSearch(t *testing.T) {
Locations: file.NewLocationSet(),
}},
},
{
name: "github.com/someorg/somename",
version: "v0.3.2",
config: CatalogerConfig{
SearchLocalVendorLicenses: true,
LocalVendorDir: localVendorDir,
},
expected: []pkg.License{{
Value: "Apache-2.0",
SPDXExpression: "Apache-2.0",
Type: license.Concluded,
URLs: []string{"file://$GO_VENDOR/github.com/someorg/somename/LICENSE"},
Locations: file.NewLocationSet(),
}},
},
{
name: "github.com/CapORG/CapProject",
version: "v4.111.5",
config: CatalogerConfig{
SearchLocalVendorLicenses: true,
LocalVendorDir: localVendorDir,
},
expected: []pkg.License{{
Value: "MIT",
SPDXExpression: "MIT",
Type: license.Concluded,
URLs: []string{"file://$GO_VENDOR/github.com/!cap!o!r!g/!cap!project/LICENSE.txt"},
Locations: file.NewLocationSet(),
}},
},
{
name: "github.com/someorg/strangelicense",
version: "v1.2.3",
config: CatalogerConfig{
SearchLocalVendorLicenses: true,
LocalVendorDir: localVendorDir,
},
expected: []pkg.License{{
Value: "Apache-2.0",
SPDXExpression: "Apache-2.0",
Type: license.Concluded,
URLs: []string{"file://$GO_VENDOR/github.com/someorg/strangelicense/LiCeNsE.tXt"},
Locations: file.NewLocationSet(),
}},
},
}
for _, test := range tests {

21
syft/pkg/cataloger/golang/test-fixtures/licenses-vendor/github.com/!cap!o!r!g/!cap!project/LICENSE.txt generated Normal file
View File

@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2014 Someone Cool <someone@cool.net.com.exe>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

201
syft/pkg/cataloger/golang/test-fixtures/licenses-vendor/github.com/someorg/somename/LICENSE generated Normal file
View File

@ -0,0 +1,201 @@
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syft/pkg/cataloger/golang/test-fixtures/licenses-vendor/github.com/someorg/strangelicense/LiCeNsE.tXt generated Normal file
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@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
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the copyright owner that is granting the License.
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other entities that control, are controlled by, or are under common
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