Function applyPackageOverride

pkg/packages/packages.go:409–466

(packages []*StepPackageVersion, override *PackageVersionOverride)

}

func applyPackageOverride(packages []*StepPackageVersion, override *PackageVersionOverride) []*StepPackageVersion {
	if override.Version == "" {
		return packages // not specifying a version is technically an error, but we'll just no-op it for safety; should have been filtered out by ParsePackageOverrideString before we get here
	}

	var matcher func(pkg *StepPackageVersion) bool = nil

	switch {
	case override.PackageID == "" && override.ActionName == "": // match everything
		matcher = func(pkg *StepPackageVersion) bool {
			return true
		}
	case override.PackageID != "" && override.ActionName == "": // match on package ID only
		matcher = func(pkg *StepPackageVersion) bool {
			return pkg.PackageID == override.PackageID
		}
	case override.PackageID == "" && override.ActionName != "": // match on step only
		matcher = func(pkg *StepPackageVersion) bool {
			return pkg.ActionName == override.ActionName
		}
	case override.PackageID != "" && override.ActionName != "": // match on both; shouldn't be possible but let's ensure it works anyway
		matcher = func(pkg *StepPackageVersion) bool {
			return pkg.PackageID == override.PackageID && pkg.ActionName == override.ActionName
		}
	}

	if override.PackageReferenceName != "" { // must also match package reference name
		if matcher == nil {
			matcher = func(pkg *StepPackageVersion) bool {
				return pkg.PackageReferenceName == override.PackageReferenceName
			}
		} else {
			prevMatcher := matcher
			matcher = func(pkg *StepPackageVersion) bool {
				return pkg.PackageReferenceName == override.PackageReferenceName && prevMatcher(pkg)
			}
		}
	}

	if matcher == nil {
		return packages // we can't possibly match against anything; no-op. Should have been filtered out by ParsePackageOverrideString
	}

	result := make([]*StepPackageVersion, len(packages))
	for i, p := range packages {
		if matcher(p) {
			result[i] = &StepPackageVersion{
				PackageID:            p.PackageID,
				ActionName:           p.ActionName,
				PackageReferenceName: p.PackageReferenceName,
				Version:              override.Version, // Important bit
			}
		} else {
			result[i] = p
		}
	}
	return result
}