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parse.go
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parse.go
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package lockfile
import (
"errors"
"fmt"
"path/filepath"
"sort"
"strings"
)
func FindParser(pathToLockfile string, parseAs string) (PackageDetailsParser, string) {
if parseAs == "" {
parseAs = filepath.Base(pathToLockfile)
}
return parsers[parseAs], parseAs
}
// this is an optimisation and read-only
var parsers = map[string]PackageDetailsParser{
"buildscript-gradle.lockfile": ParseGradleLock,
"Cargo.lock": ParseCargoLock,
"composer.lock": ParseComposerLock,
"conan.lock": ParseConanLock,
"Gemfile.lock": ParseGemfileLock,
"go.mod": ParseGoLock,
"gradle.lockfile": ParseGradleLock,
"mix.lock": ParseMixLock,
"Pipfile.lock": ParsePipenvLock,
"package-lock.json": ParseNpmLock,
"packages.lock.json": ParseNuGetLock,
"pdm.lock": ParsePdmLock,
"pnpm-lock.yaml": ParsePnpmLock,
"poetry.lock": ParsePoetryLock,
"pom.xml": ParseMavenLock,
"pubspec.lock": ParsePubspecLock,
"renv.lock": ParseRenvLock,
"requirements.txt": ParseRequirementsTxt,
"yarn.lock": ParseYarnLock,
}
func ListParsers() []string {
ps := make([]string, 0, len(parsers))
for s := range parsers {
ps = append(ps, s)
}
sort.Slice(ps, func(i, j int) bool {
return strings.ToLower(ps[i]) < strings.ToLower(ps[j])
})
return ps
}
var ErrParserNotFound = errors.New("could not determine parser")
type Packages []PackageDetails
func toSliceOfEcosystems(ecosystemsMap map[Ecosystem]struct{}) []Ecosystem {
ecosystems := make([]Ecosystem, 0, len(ecosystemsMap))
for ecosystem := range ecosystemsMap {
if ecosystem == "" {
continue
}
ecosystems = append(ecosystems, ecosystem)
}
return ecosystems
}
func (ps Packages) Ecosystems() []Ecosystem {
ecosystems := make(map[Ecosystem]struct{})
for _, pkg := range ps {
ecosystems[pkg.Ecosystem] = struct{}{}
}
slicedEcosystems := toSliceOfEcosystems(ecosystems)
sort.Slice(slicedEcosystems, func(i, j int) bool {
return slicedEcosystems[i] < slicedEcosystems[j]
})
return slicedEcosystems
}
type Lockfile struct {
FilePath string `json:"filePath"`
ParsedAs string `json:"parsedAs"`
Packages Packages `json:"packages"`
}
func (l Lockfile) String() string {
lines := make([]string, 0, len(l.Packages))
for _, details := range l.Packages {
ecosystem := details.Ecosystem
if ecosystem == "" {
ecosystem = "<unknown>"
}
ln := fmt.Sprintf(" %s: %s", ecosystem, details.Name)
if details.Version != "" {
ln += "@" + details.Version
}
if details.Commit != "" {
ln += " (" + details.Commit + ")"
}
lines = append(lines, ln)
}
return strings.Join(lines, "\n")
}
// Parse attempts to extract a collection of package details from a lockfile,
// using one of the native parsers.
//
// The parser is selected based on the name of the file, which can be overridden
// with the "parseAs" parameter.
func Parse(pathToLockfile string, parseAs string) (Lockfile, error) {
parser, parsedAs := FindParser(pathToLockfile, parseAs)
if parser == nil {
if parseAs != "" {
return Lockfile{}, fmt.Errorf("%w, requested %s", ErrParserNotFound, parseAs)
}
return Lockfile{}, fmt.Errorf("%w for %s", ErrParserNotFound, pathToLockfile)
}
packages, err := parser(pathToLockfile)
if err != nil && parseAs != "" {
err = fmt.Errorf("(extracting as %s) %w", parsedAs, err)
}
sort.Slice(packages, func(i, j int) bool {
if packages[i].Name == packages[j].Name {
return packages[i].Version < packages[j].Version
}
return packages[i].Name < packages[j].Name
})
return Lockfile{
FilePath: pathToLockfile,
ParsedAs: parsedAs,
Packages: packages,
}, err
}