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parse-gradle-lock.go
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parse-gradle-lock.go
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package lockfile
import (
"bufio"
"fmt"
"os"
"path/filepath"
"strings"
)
const (
gradleLockFileCommentPrefix = "#"
gradleLockFileEmptyPrefix = "empty="
)
func isGradleLockFileDepLine(line string) bool {
ret := strings.HasPrefix(line, gradleLockFileCommentPrefix) ||
strings.HasPrefix(line, gradleLockFileEmptyPrefix)
return !ret
}
func parseToGradlePackageDetail(line string) (PackageDetails, error) {
parts := strings.SplitN(line, ":", 3)
if len(parts) < 3 {
return PackageDetails{}, fmt.Errorf("invalid line in gradle lockfile: %s", line)
}
group, artifact, version := parts[0], parts[1], parts[2]
version = strings.SplitN(version, "=", 2)[0]
return PackageDetails{
Name: fmt.Sprintf("%s:%s", group, artifact),
Version: version,
Ecosystem: MavenEcosystem,
CompareAs: MavenEcosystem,
}, nil
}
type GradleLockExtractor struct{}
func (e GradleLockExtractor) ShouldExtract(path string) bool {
base := filepath.Base(path)
for _, lockfile := range []string{"buildscript-gradle.lockfile", "gradle.lockfile"} {
if lockfile == base {
return true
}
}
return false
}
func (e GradleLockExtractor) Extract(f DepFile) ([]PackageDetails, error) {
pkgs := make([]PackageDetails, 0)
scanner := bufio.NewScanner(f)
for scanner.Scan() {
lockLine := strings.TrimSpace(scanner.Text())
if !isGradleLockFileDepLine(lockLine) {
continue
}
pkg, err := parseToGradlePackageDetail(lockLine)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to extract from lockline: %s\n", err.Error())
continue
}
pkgs = append(pkgs, pkg)
}
if err := scanner.Err(); err != nil {
return []PackageDetails{}, fmt.Errorf("failed to read: %w", err)
}
return pkgs, nil
}
var _ Extractor = GradleLockExtractor{}
//nolint:gochecknoinits
func init() {
registerExtractor("gradle.lockfile", GradleLockExtractor{})
}
func ParseGradleLock(pathToLockfile string) ([]PackageDetails, error) {
return extractFromFile(pathToLockfile, GradleLockExtractor{})
}