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system.go
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system.go
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package mockos
import (
"encoding/json"
"fmt"
"io/ioutil"
"machinerun.io/disko"
)
// System returns a mock os implementation of the disk.System interface.
func System(layout string) disko.System {
file, err := ioutil.ReadFile(layout)
if err != nil {
panic(err)
}
sys := &mockSys{}
if err := json.Unmarshal(file, sys); err != nil {
panic(err)
}
return sys
}
type mockSys struct {
Disks disko.DiskSet `json:"disks"`
}
func (ms *mockSys) ScanAllDisks(filter disko.DiskFilter) (disko.DiskSet, error) {
disks := disko.DiskSet{}
for n, d := range ms.Disks {
if filter == nil || filter(d) {
disks[n] = d
}
}
return disks, nil
}
func (ms *mockSys) ScanDisks(filter disko.DiskFilter, paths ...string) (disko.DiskSet, error) {
disks := disko.DiskSet{}
for _, p := range paths {
d, e := ms.ScanDisk(p)
if e != nil {
return nil, e
}
if filter(d) {
disks[d.Name] = d
}
}
return disks, nil
}
func (ms *mockSys) ScanDisk(path string) (disko.Disk, error) {
// Find the disk from the disk set
for _, d := range ms.Disks {
if d.Path == path {
return d, nil
}
}
return disko.Disk{}, fmt.Errorf("disk %s not found", path)
}
func (ms *mockSys) CreatePartition(d disko.Disk, p disko.Partition) error {
if disk, ok := ms.Disks[d.Name]; ok {
if _, ok := disk.Partitions[p.Number]; ok {
return fmt.Errorf("partition %d already exists", p.Number)
}
disk.Partitions[p.Number] = p
// Ignore free spaces for mock
return nil
}
return fmt.Errorf("disk %s does not exist", d.Name)
}
func (ms *mockSys) CreatePartitions(d disko.Disk, pSet disko.PartitionSet) error {
for _, p := range pSet {
if err := ms.CreatePartition(d, p); err != nil {
return err
}
}
return nil
}
func (ms *mockSys) UpdatePartition(d disko.Disk, p disko.Partition) error {
cur, ok := d.Partitions[p.Number]
if !ok {
return fmt.Errorf("partition %d did not exist on disk %s", p.Number, d)
}
emptyGUID := disko.GUID{}
emptyType := disko.PartType{}
upd := cur
if p.Name != "" {
upd.Name = p.Name
}
if p.ID != emptyGUID {
upd.ID = p.ID
}
if p.Type != emptyType {
upd.Type = p.Type
}
d.Partitions[p.Number] = upd
return nil
}
func (ms *mockSys) UpdatePartitions(d disko.Disk, pSet disko.PartitionSet) error {
for _, p := range pSet {
if err := ms.UpdatePartition(d, p); err != nil {
return err
}
}
return nil
}
func (ms *mockSys) DeletePartition(d disko.Disk, number uint) error {
if disk, ok := ms.Disks[d.Name]; ok {
if _, ok := disk.Partitions[number]; !ok {
return fmt.Errorf("partition %d does not exist", number)
}
delete(disk.Partitions, number)
// Ignore free space for mock
return nil
}
return fmt.Errorf("disk %s does not exist", d.Name)
}
func (ms *mockSys) Wipe(d disko.Disk) error {
// later mate
return nil
}